700r4 lockup vacuum switch. Toyota Transmission Information .

700r4 lockup vacuum switch Useful for 700R4, 2004R'S and other units working without computers and needing help getting lock-up in and out at the proper time. While this vacuum operation makes the lock-up fully automatic, there is also a manual override option that allows complete control over lock-up if wanted or needed. If you're driving at a pace where it's jumping in-out of lockup simply switch it off. The ground to the solenoid is what Apr 12, 2011 · Universal TCC Lock-Up Kit for 700R4 and 2004R This kit enables hands-free, automatic activation of the Torque Converter Clutch (TCC) along with the option of manual control. This kit includes: Vacuum switch 4th gear pressure switch Brake switch Torque converter lock-up solenoid Wire harness New transmission pan gasket Mounting hardware. One prong to the 12v+ source, the second to the solenoid. Find Parts and Accessories 700r4 lock up kit KEYWORD and get Free Shipping Mar 17, 2022 · Transmission High Gear 4Th Gear Lock up Switch Package. Lol. TCI sells an automatic lockup. When one switch closes again due to driving conditions (and the rest are already closed), lockup is engaged Sep 13, 2006 · This TCI Universal Lock-Up Kit for GM 700R4 works by referencing engine vacuum to automatically engage or disengage the torque converter lock-up clutch Aug 25, 2021 · Superior 700R4 700-R4 2004R 200-4R Universal Adjustable Torque Converter Lockup Vacuum Switch - Automotive Automatic Transmission Parts - Amazon. You could change it but the tranny is not designed to shift gears locked up. Q: What is the setting on the vacuum switch? A: The vacuum switch comes factory preset to close at 8 - 10 inches of Hg. Jun 6, 2012 · The metal bracket is screwed to the firewall. That's gonna be '81 and on California square bodies. Jon N. 00. The '82 was also built with a Turbo 350C so when I upgraded to the 700R4 I needed to add a ground wire and different plug for the trans. When the internals are working correctly, +12 volts at pin A will cause the TCC to lock. Mine is wired like this. My friends 55 when it's cold out will lug enough when it goes into 4th& lock up that it will occasionally backfire at temperatures we see now never in summer it's issue is 4th & lock up comes on too low around 35 I'm about to swap the governor pedal is up the switch is fully depressed. In the other thread we discussed how this setup should work, and basically the conclusion was that it would probably only lockup in 4th gear, and the vacuum switch should disengage the lockup when under enough load. Useful for 700-R4, 200-4R’s and other units working without computers and needing help getting lock-up in and out at the proper time. The firewall tip-in vacuum switch would only get vacuum after the engine warmed up a little. NOTE: The GM TH700R4 transmissions were offered in GM cars and trucks from 1981 thru 1993. 4. Oct 5, 2017 · in most stock 700r4 applications the ecm has a delay for lockup it is usually between 1-3 seconds after the 4th gear shift. Easy Lock-Up For 700R4 & 200R4 For Pre-1993 700R4 & 200R4 transmissions, JEGS Lock-Up Kit features an adjustable vacuum switch to fine tune the lock-up point on modified engines. senses 7hg. I have run into a problem that apparently is very common to this system. Oct 6, 2017 · Vacuum switch for 700R4 Torque Converter lockup This vacuum switch works great in conjunction with a time delay relay for locking up my torque converter on my 700R4 transmission in my 50 Chevy pickup truck. It does not have a vacuum source --> should it get manifold or ported vacuum? Jun 20, 2009 · With the vacuum switch, it will kick out of lockup when you push down on the gas which lowers engine vacuum. Mar 3, 2025 · Torque Converter Lockup Kit, Vacuum Switch, GM 700R4, Kit See More Specifications | Check the Fit. The next step for me is a vacuum switch to help with kick down. I bought a loc/up kit for $99. When retrofitted into early muscle cars, these trannys require the pressure switch to be changed and a few wires rerouted. TCI® 376600 Kit Contains: Qty. The switch will open as you step on the throttle. This High Gear Lock-Up allows lock-up in 4th gear only. OE Part Number: 4L60 700R4 700-R4 2004R 200-4R MD8 GM K013 K-013 74416AK S74416AK A74416AK 99411 ; Fit for TH 700-R4 & TH 200-4R Transmission, not work on 4L60E, 4L65E or 4L70E. It was GM part number #14020691, and they are no longer in production. Have a qualified technician help if you suspect something else is wrong. Torque Converter Lockup Kit, Vacuum Switch, GM 700R4, Kit. Free Shipping As you apply and release the vacuum, check that continuity across the contacts is made and lost as per the test procedure below: Also the vacuum line to the switch originally came with a delay valve to prevent the TCC from "short cycling" (i. Now it works 2000 rpm @ 60 mph, without lock up 2500 rpm. Problem Solver. is sensing the right pressure it in a since turns on an sends voltage to the tcc. Every vacuum switch I've found has 2 Aug 31, 2020 · If you were to substitute a vacuum lock-up switch from an early 80's S10 for the manual switch, you'd have the best of both worlds. It can be wired to a toggle switch also, but I chose vacuum on the carb and it works. Unlike the GM vacuum switch, this switch allows the vacuum trigger point to be adjusted between 6 to 22 inches of vacuum. This switch allows the vacuum trigger point to be adjusted between 1 to 6 inches of vacuum. Also what if I don't install one at all and just not have a lock up. Dec 6, 2019 · The trans is capable, but there is a vacuum switch on the firewall that sends power to the TCC for 3rd gear lockup, which is disconnected. A person could run it without the timer but having the converter immediately lockup as soon as vacuum comes back is not ideal. The switch is there as is the TVS but I'll need to get a vacuum delay. Aug 24, 2017 · The reason the GM 700r4 worked so smoothly wasn't the vacuum switch itself, it was the vacuum delay valve they put between the vacuum source and the switch. Condition: 100% Brand New. I need a simple explanation of how to use the four prong pigtail from the tranny( 1985 corvette, 700r4 and 350sbc) to the brake switch. Hit the brakes, unlocks at any speed. 00 brake pedal switch type kit Save Share Mar 6, 2010 · The vacuum switch is usually there to unlock the tranny in the event of acceleration or load on the motor. Jul 30, 2009 · Just wondering if anyone has a picture of a GM vacuum switch for a 700R4. e. EDIT: Sorry forgot your initial question. Mar 31, 2007 · As soon as you are out of the throttle the converter will lock back up and you are good to go. Dec 6, 2019 · My 1982 also has a thermal vacuum switch for the lock up. The vacuum switch senses a drop in vacuum, and unlocks the tranny, raising your rpms, giving a little more power. The vacuum switch was a piece of crap. This can be done from your manual switch at teh dash or as many people do, via the brake switch and a vacuum switch. wire from the pressure switch goes over the tranny to the plug in. It seems to me it has something to do with the transmission as it looks very similar to the other switch on the opposite side of the firewall which I believe has to do with the 700R4 lock up. 65 out of 5 stars. When the vacuum builds up again, say at cruise (foot off the pedal!), the switch closes, allowing the converter to lock up Mar 6, 2010 · The vacuum switch is usually there to unlock the tranny in the event of acceleration or load on the motor. When the switch is activated, it sends a signal to the ECM, which then commands the TCC solenoid to apply or release the lockup clutch. Next you will need a low vacuum switch GM # 14032087 or 14014519 (this will cut the power feed if vacuum is too low like when under heavy acceleration). Kit comes complete with a gasket#, wiring harness#, vacuum switch#, 4th gear pressure switch#, splice connectors#, mounting screw#, and detailed instructions. 4th gear pressure will ground the switch, thus the solenoid will be grounded. Dec 2, 2013 · And if I don't want the switch, will I have to use a vacuum operated kit? I also researched the hydraulic operated lockup that doesn't use any 12V source, but haven't heard anything good about those. My K20 has a 700-R4 and it's not plugged into anything. This kit includes: Vacuum switch; 4th gear pressure switch; Brake switch; Torque converter lock-up solenoid; Wire harness The fully adjustable vacuum switch automatically locks and unlocks the torque converter with engine vacuum and can be configured for various vacuum levels. Apparently, the engine vacuum needed to operate the lockup properly was too low. This transmission torque converter lock-up kit uses a combinational 4th gear pressure switch or lock up solenoid to control the lock up. Unlike the GM vacuum switch. I have the pigtail and brake switch. INSTALLATION INSTRUCTIONS PLEASE FEEL FREE TO CALL US ON OUR TECH LINE AT (330) 434-2757 BETWEEN 8:00 AM AND 5:00 PM EST IF YOU HAVE ANY QUESTIONS. Aug 6, 2024 · Add a switch in-series with the brake and vacuum switch and use vacuum switch without time delay. The lockup function works either by the ECM or a vacuum switch. I haven't made any adjustments yet. TCI has a video on youtube that explained the wiring pretty well also. All you need is switched 12 volts through a 4 terminal brake switch. Product Q&A Vacuum switch; 4th gear Jan 15, 2003 · Chevelleman71, you getting lockup at all? It's possible to setup a 700R4 with a non-lockup converter, but some internal fluid paths need to be changed. I'm assuming that this is the vacuum switch which controls the torque converter lockup. Or, you may go with a Toggle Switch or vacuum set-up, as suggested. Has anyone used it. The center terminal of the switch is connected to the wire that leads down to the oil pressure switch on the trans case. I have the vacuum switch on the firewall with two wires running to the transmission. While the trans doesn't have a vacuum modulator like the 350's and 400's it does have a vacuum switch to unlock the converter under load which is located by the brake booster and looks similar to the one pictured by desert. Connect it to a fuse/key-on hot, you do not want power on the solenoid setting in the garage. Jan 12, 2022 · Drew shows us how simple it is to install the Painless Wiring 700R4 lock-up kit. Note: Sep 14, 2004 · This kit includes: Vacuum switch, 4th gear pressure switch, brake switch, torque converter lock-up solenoid, wire harness, transmission pan gasket and mounting hardware. If it has electrical lock up, it should already have the solenoid and pressure switch in the transmission. surges in and out of lock-up, please turn the vacuum switch adjustment screw 2 turns counterclockwise. I use to use that setup, Then when I had my 700r4 rebuilt The transmission man fixed my trans to where I did not need anything, whenever the transmission goes into 4th gear it automatically locks up the torque converter, Best setup yet works great. it is a nice to have function as it makes the 4th gear and lock up feel like separate functions instead of the dreaded stumble shift lockup all at once feeling 700R4 2004R 350C transmission adjustable vacuum switch A74439A superior k058 200-4R's and other units working without computers and needing help getting lock-up It is also beneficial when removing a factory computer in pre-1993 vehicles with a 700R4 or 2004R transmission. Oct 4, 2020 · I have a 1988 700R4 in a S10, it is powered by a 3. Vic Superior 700R4 700-R4 2004R 200-4R Universal Adjustable Torque Converter Lockup Vacuum Switch. You do not need a relay, and you do not need a switch, the transmission will take care of that. I need the vacuum switch, the brake switch, the relay, and the associated wiring if that's available too. May 29, 2023 · Useful for 700R4, 2004R'S and other units working without computers and needing help getting lock-up in and out at the proper time. Lockup Control Switch: The lockup control switch is typically located on the vehicle’s dashboard and allows the driver to manually engage or disengage the torque converter lockup. Also the converter will unlock when you push the brake pedal, or when the transmission downshifts from 4th to 3rd. In the after-market the included 4th (overdrive) gear pressure switch on the valve body must be swapped out, but the resulting function is the same as if an ECM was controlling lockup. Universal Adjustable Vacuum Switch (1-6 Inches of Vacuum), Superior # K052. amazon. Unlocks at 50 when you let off the gas. I'd like to try and get the lock up converter working. Show More Oct 28, 2015 · The key is the vacuum switch, ala GM's design. Feb 10, 2015 · The relay see's the vacuum switch that's mounted on the fire wall turn off (the vacuum sw. An 8 sec time delay will end up ending in tears [thrown out] At 70 mph you would cover 273 yards in 8 secs before it locks up. Feb 24, 2008 · I am swapping to a 700R4 and have learned much from TC and those that have gone before. It has a pressure switch, and its a one wire hookup. A provided vacuum controlled switch and 4th gear pressure switch controls the torque converter lock up solenoid. Mine has the vacuum switch and brake pedal switch, but no manual lockup. The RPM went up, engine had more vacuum, so it would re-lock the 6 days ago · Torque Converter Lockup Kit, Wiring Kit, Vacuum Switch, GM, 200-4R, 700R4, Kit See More Specifications | Check the Fit TCI 2004R/700R4 Lockup Wiring Kits 376600 Feb 14, 2015 · Painless Performance Products Transmission Torque Converter Lock-Up Kit GM 700R4 Transmissions. No need to worry about the speed sensor either! This 700R-4 transmission torque converter lock-up kit lets you run your carbureted engine with an economical overdrive transmission. Less common control devices are a throttle microswitch, a gear selector switch (senses when in 3rd gear), and an RPM activated switch. All the other carbureted, 49 state ones use the solenoid and switch in the transmission, which have their power fed to them by a four pin style connector above the pan, and the vacuum switch, brake light switch, and WOT switch control TCC functions. The system switches off due to a signal from the brake pedal. High RPM = low vacuum, lock up "on", I suppose. . is NC that's why I had to use a relay) when the vacuum sw. Problem Solver Useful for 700-R4, 200-4R's and other units working without computers and needing help getting lock-up in and out at the proper time. I also have it wired through the brake switch so it unlocks when you press the brake pedal. Hg. an lf the pressure sw. the two terminals closer together are for pass through voltage and the terminals farther apart are for brake lights. I also used only one pressure switch in 4th so lock up would only occur in 4th. The car is being built for my daughter o will not even notice if there is a switch for the lock up on the dash. That said, I still have a question. Part Number: 764-60109. Softer upshift. A750E A750F A761E Fluid Fill Specifications; A750E/F A761E Line Pressure; AC60E AC60F Fluid Info; AC60E AC60F Torque Specs Oct 2, 2013 · This 700R4 technical resource is a service of Purple Sage Trading Post and a gentleman named Sumner. It comes with everything to complete the installation including a new pan gasket. Kit comes with all wiring and everything needed to complete the installation and fits any GM TH700R4 transmission. Sep 6, 2011 · You can just cut the wire comming from pin D. Which wires go where? I heard it can be done without inside wiring or vacuum. Find Painless Performance 700R4 Converter Lock-Up Kits and get Free Shipping on Orders Over $109 at Summit Racing! These converter lockup kits from Painless give you an inexpensive way to automatically lock up the torque converter in 4th gear, when retrofitting a GM 700R4 transmission into an early non-computer controlled vehicle. It works just the way I want it. The switch opens at 7 lbs of vacuum or lower. I like having full functionality better than just forcing lockup with 4th gear engagement. Part Number: PRF-60109. The vacuum hose that comes out of it can easily reach the carburetor. 4L60 is the new designation for the GM 700-R4, 200-4R, 180C, 350C etc. when under load and manifold vacuum drops the TCC disengages to give the extra RPMs needed. If it's on a pressure switch only, it might be nearly instantaneous so you won't notice it when it locks going into 4th. 1L V-6. Unlocks when vacuum gets below 7" and won't flutter locked/unlocked for a few seconds with the delay valve. If you're in 3rd or 4th, your vacuum is low (cruise), and your foot is off the brake, you'll have TCC lockup. Nov 4, 2018 · It has brake switch to disengage the torque converter and a vacuum switch on the firewall. Problem is, it had no hysteresis. Torque Converter Lockup Kit, Vacuum Switch Activated, 700R4, Kit. If you had to add the brake switch run a wire to under the hood from it. Engine: Any; Trans: TH700R4; Set includes: Vacuum switch; 4thg ear pressure switch; Brake switch; Torque Feb 8, 2025 · FITS: TH 700-R4 / TH 200-4R / TH 350C. continuously cutting in and out when near the lock up point). or higher. However. Aug 7, 2020 · Here is how I wired a vacuum switch on the 700r4 in my c10. I installed this switch and problem solved. This means that in order for the solenoid to be activated the switch must get 8 - 10 in. Apr 1, 2016 · I hated it. I have dealt with Bowtie a few times before, their Tech is the best and their prices are reasonable. Vacuum Switch Vacuum Switch Term Toyota Transmission Information . If it's hydraulic lock up (Tans-go or Superior) it's all automatic and you don't need 01-16-19 03:27 AM - Post# 2757514 In response to Shepherd Lock up converters are not designed to withstand engine torque at wide open throttle so the factory installs vacuum switches to unlock the converter at WOT. b. Both the 2004R and 700R4 use a lockup-style torque converter that requires 12 volts and a pressure switch to lock up in Fourth gear. Myself I get them from the junkyard (found on early 80s full sized trucks, subs & vans for the lockup normally Painless 700R4 Transmission Torque Converter Lock-Up Kit features vacuum controlled switch. Jan 26, 2020 · You have to remove the interior wiring harness and replace with theirs, including the 4th gear pressure switch, exterior wiring plug and the vacuum switch for lockup. Kit comes with everything needed to complete the installation and fits any GM TH700R4 transmission. Mar 8, 2012 · what should i use in my 700r4 conversion 71 chevelle. If you step on the brake, the circuit opens. The kits include everything you need for an easy installation Mar 31, 2010 · Almost everything else I saw was partial kits and/or more expensive. I can now switch it on or off. This is Normally Closed(NC). Fitment: TH 700-R4 and TH 200-4R . TCI Replacement Vacuum Switches with qualifying Nov 19, 2011 · Internal Pressure passages on the 700r4 prevent the torque converter from locking up in first gear. May 19, 2017 · Useful for 700-R4, 200-4R’s and other units working without computers and needing help getting lock-up in and out at the proper time. Jun 28, 2005 · Normal devices used to control lockup are a manual switch, a brake cancel switch (opens when the brake is depressed), and a vacuum activated switch (closes at a certain vacuum level - fixed or adjustable). Transmission torque converter will lock-up in 4th gear only. Painless Performance 700R4 Converter Lock-Up Kits 60109 PRF-60109. ). This 700R4 transmission torque convertor kit includes new 4th gear pressure switch, new May 12, 2012 · The vacuum switch has a small allen screw adjustment to adjust when it engages. Jan 16, 2015 · The usual way of connecting the lockup function is to have several switches in series, usually brake switch > vacuum switch > 4th gear oil pressure switch. Unlike the GM vacuum switch, this switch allows the vacuum trigger point to be adjusted between 1 to 6 inches of vacuum. 00 internal manual vacuum solenoid actuated lock up kit. Jul 25, 2021 · Here’s what I did: I used a TCI vacuum switch and a delay relay timer switch to control the lockup. Package include: The kit includes a pressure switch and all wiring necessary. the lock-up system not to work. The transmission receives the signal and applies fluid pressure to the clutches in the lock-up converter. May 16, 2001 · I wired, in series with the brake release of the lock-up converter) a vacuum switch that released lockup when i stepped on the gas, Passing gear without going into 3rd, a lot of fun. Earlier versions without ECM use a vacuum switch connected to ported vacuum. Unlike the pedal is up the switch is fully depressed. You will also want a brake switch inline with the vacuum switch, not much thought needed there,,, as long as you are running a 4th gear switch on the valve body it should down shift and unlock the converter before you come to a stop anyhow. May 6, 2023 · Why bother with a relay or a toggle switch? Put TCI's vacuum switch in-line with the brake switch, 3-4 pressure switch, and the TCC solenoid. Now there's an inexpensive way to automatically lock up the torque converter in 4th gear without the need for a computer. May 13, 2022 · Like the title says, I'm looking for the lock up converter stuff for a 700-R4 in a K20. attach a vacuum hose to the switch from a constant manifold vacuum source. Universal Adjustable Vacuum Switch with adjustments from 6" to 22" of vacuum from Superior! Useful for 700-R4, 200-4R's and other units working without computers and needing help getting lock-up in and out at the proper time. May 20, 2021 · Most of the emissions and vacuum lines have been clipped or removed. Superior Adjustable Vacuum Switch Kit. Dec 31, 2011 · Here is what I have. qThe supplied vacuum switch is pre-adjusted at 12” to 15”. If you're not in 3rd or 4th, the circuit opens. It just don’t drive good. I installed a toggle switch in mine in addition to the vacuum switch just so I can lock the converter up if I want to cruise in 3rd for a while without the slippage of the converter causing unnessary heat to build up. Part Number: 60109. May 2, 2007 · Couple this with the constant pressure to achieve mandated emission control and fuel mileage standards, the engineers "tweaked" the torque converter lock up control inputs which, in the 700R4, are the speed sensor (one wire), the stop light switch (second wire) vacuum switch (third wire) (the 4th wire is the ground). com MPH Switch Jan 19, 2021 · You need to talk to your transmission supplier to find out what is in your 700R4. or the 75. The hot side runs through the vacuum switch in series with the timer relay. Feb 14, 2010 · Update for future lurkers: I finally found a recommended vacuum delay valve NOS GM 14020691 and it has resolve 90% of issue. Please help. Won't lock until 4th gear and over 55 mph. They have installed a pressure sensitive switch in the 700R4 in series with the TCC solenoid control circuit. The only time I have a surging issue is occasionally at about 45-50 MPH when I am still slightly accelerating up to 50 MPH speed limits in my area when it does this I let up on gas very slightly (but still accelerating) and it locks up with no further surging. This switch can also be wired-in to be normally open or closed. com www. I found one a couple years ago and paid $50 for it. ~ The person who doesn't listen to the media is the best informed. Part Number: SUM-705418. The TCC cycles back and A provided vacuum-controlled switch and 4th gear pressure switch controls the torque converter lock-up solenoid. Converter Lock-up will occur 8-10 seconds after 4th gear engagement. I'm just looking for a simple lockup kit, preferably vacuum free unless I have no choice other than a manual switch or vacuum switch. Oct 11, 2010 · Brake switch, vacuum switch, vacuum delay check valve, 4th gear pressure switch and a B&M speed control lockup control. Product Features: This High Gear Lock-Up allows lock-up in 4th gear only. This eliminates the need for a manual switch. Jun 29, 2021 · Universal Lockup Wiring Kit ; For Use With 2004R/700R4 Transmissions; Includes Gasket, Wiring Harness, Vacuum Switch, 4th Gear Pressure Switch, Splice Connectors, Mounting Screw, Instructions Universal Adjustable (6-22 inch) Vacuum Switch. Aug 10, 2011 · I added an adjustable vacuum switch to my 700r4 lock-up system. The third connection switch is a ground (-) terminal that connects to the lead from the transmission connector plug. Feb 19, 2006 · Use a one prong 4th gear pulse switch wired to the ground side of the solenoid. Just a side note, I found that the dail is real sensitive, mine is about 1/3 the way around and that seems to give lock up @ about Feb 6, 2020 · Rated 5 out of 5 by Biggie B from Works Great I installed a 700R4 w/lockup in my '70 C-10. (Superior Part No. This kit will work with both carbureted and fuel injected engines and saves Aug 8, 2016 · Yes, 85-87 Monte Carlo with cruise will work. Dec 22, 2020 · All 700R4's do have one electrical plug located on the left side of the trans that I know of which is for converter lockup. There is a nice set of diagrams showing how to route power to pin A. Feb 20, 2009 · I tried to use a lockup kit with a vacuum switch with little success. the 150. Oh, sureit was adjustable. I understand that I can do 4th gear lock-up with either vacuum or 12V. The converter would lock and unlock at every little incline, which was very annoying. Vacuum switch will deny lock-up under wide open throttle, heavy acceleration, and while ascending steep grades. If there is one wire to the solenoid, use a 2 prong 4th gear switch and split the power (12v+) thru the switch. I could set the vacuum switch at any amount of vacuum, but as soon as the trans engaged lockup, engine vacuum dropped, the switch unlocked the torque converter. 12 Volts from the dash with a inline fuse to the pressure switch, Then the 12 V. Description One (1) Internal Wiring Harness One (1) External Wiring Harness One (1) Vacuum Switch Mar 30, 2022 · Transmission high gear lock up switch kit includes switch and all wiring necessary as pictured. This kit contains quality OE connectors and oil-resistant wire. it turns off an then the relay sends voltage to the pressure sw. I have my converter lock up with a manual switch in 4th gear only but sometimes it shifts down pretty hard if I forget to turn the switch off when I slow down. setting of the vacuum switch is up to you, your engine, and your personal preference. Estimated Ship Date: Today. Oct 27, 2024 · Unless you are running a vacuum switch it's going to keep lock up on once in 4th gear untill it downshifts out of 4th or touch the brake & it may lug. Free Shipping Kit comes complete with everything to complete the installation and fits any 700R4 GM transmission. They must all be closed for lockup to occur, but any one of them disables lockup. The 12vdc is applied via the brake switch on most models. Have street rod friends that have done exactly that. Seamlessly control your torque converter lock up with this easy to install kit. Fuse holder connects to the lighted manual switch's bottom terminal providing the 12V+ power source. Bowler Performance 700R-4 Lock-up Control Module. mount the vacuum switch in the engine compartment in a place convenient to run a vacuum hose to. I ended up replacing the 4th gear pressure with one that is normally open and switching the lockup with a toggle switch. I have the vacuum switch on a 700-R4 in my Jaguar, and it does, in fact, "hunt" at certain speeds. 4 days ago · Vacuum switch for 700R4 Torque Converter lockup This vacuum switch works great in conjunction with a time delay relay for locking up my torque converter on my 700R4 transmission in my 50 Chevy pickup truck. TCI offers these replacement vacuum switches as direct replacements for those in your TCI lockup wiring kit. The kit allows automatic vacuum based lock-up operation without factory ECM's or handheld controllers, and comes complete with a gasket and filter kit for both Jan 10, 2017 · The TBI and CCC cars and trucks use the ECM to control torque converter lockup. I searched through a wrecking yard but don't know what I'm looking for. I have done research but there are mixed reviews on the 4th gear lock up. When the vacuum builds up again, say at cruise (foot off the pedal!), the switch closes, allowing the converter to lock up Jul 11, 2008 · I just had mine replaced in my 200 and I have the B&M lock up. This switch Jul 17, 2023 · I am about to test run my T700, and as suggested to me by a transmission place, fitted an adjustable vacuum switch to the lock up circuit. Good luck Jul 5, 2008 · 700r4 lockup setup I have read many complicated ways to hook up a lockup for a 700r4. Mar 23, 2020 · I am installing a 700r4 into my 70. The kit allows automatic vacuum based lock-up operation without factory ECM's or handheld controllers, and comes complete with a gasket and filter kit for both As we work toward looking after all the small details of this build, I want to show you how to install a Superior Solutions adjustable vacuum switch for your Useful for 700-R4, 200-4R's and other units working without computers and needing help getting lock-up in and out at the proper time. 5 out of 5 stars. ityw nmjkfrt tvctlu tgwd ltqw hdkyf ulj oiuz fgkgff eiwerwzx erswta vfzmhw qsxngmkz snlkx qdbrsu