Search results

The 700R4 I was building before I decided to go 6L80 had pressure switches on 3rd and 4th gear so it would lock up in 3rd and 4th

All transmissions (that we would be talking about) are 12V even the 4L80 they put in the HMMWV, They should have given you a schematic, all you have to do is wire 12V through the pressure switch to the lockup solenoid, unless they did that for you inside the transmission, again they should have...

Have the transmission built with a 4th gear pressure switch in the valve body, then just wire up the torque converter solenoid to that switch, it will only go into lockup in 4th gear, nothing else needs to be switched, this can also be done after the transmission is built all you have to do is...

I spent 8 years as a POW (prisoner of Waco)

Been a while since I was in Amarillo, almost 700 miles from where I live:ROFLMAO:

What part of central Texas?, that in itself is larger than many states.

Air World transmission in Houston. Not a big shop but I have always been pleased with the work and knowledge. Are you thinking of installing a 700R4? if so I may have something that will get you to a good start.

Should not be necessary the only time that circuit pulls any current is when in 4th gear, I would just use a fused link to the 12V source

The switched power to the alt is 24V, you need 12V for the TC lockup, if you are only running TC in 4th you really do not need switched 12V to the TC lockup wire.

Monitoring the pressures on a 700R4 when installed is a fairly big deal, the TV cable adjustment is critical to the transmission survival, if far enough off it can fry the transmission in just a few miles, I am NOT saying that was the case here but the shop installing it should have monitored...

I have always recommended that folks get their trans built by a local shop and this experience bears that out, having said that because I do all the install work myself I picked a highly recommended shop in Houston, a 4 hour drive yes but in Texas that is "local"

Temp gauge should not be necessary, even Matt admits it never gets close to being hot, the TH400 puts out allot more heat than the 4L60, the beauty of a lockup TC and a much more efficient design. EDIT, now if you have a TH400 and want to scare the crap out of yourself put a temp gauge on it.

So if we follow along, 12V goes into A then it goes through the TC lockup solenoid, the inductor shunted by a protection diode (protects the 12V from high voltage spikes when the 12V is removed) THEN the solenoid is seeking ground to go into lockup, it goes to D where if you had an ECM (engine...

According to your schematic if you put 12V on A it will only lock in 4th, if you ground the ECM ground it will be locked all the time so don't do that.

You need to pick up the brake light signal under the dash at the switch, after that it goes through the turn signal switch and is useless for that purpose anywhere under the vehicle. I have no idea why you would want to disable the TC lock under full throttle, on a long hill for example you...

You can ground it to the engine or transmission, curious did the trans builder specify a brake switch? It seems unnecessary as the transmission will only go into lockup in 4th gear but would possibly be specified for CYA safety reasons. You need to power the converter from a switched source or...

It is all 3/8-16 https://www.ebay.com/itm/232077209088?epid=13005100032&hash=item3608e12e00:g:Iu8AAOSwFdtX0ysB I had to do some mods to clear the drive shaft, of course I have no idea what you will face if you go this route.

This is how I did the 6L80, not sure if the bolt pattern will allow this or not, it is the same as a 4L80 as that is the bell crank from a HMMWV with a 4 speed. The U shaped rod should also work just make it out of all thread the length you need.

All you have to do is supply 12V to A, should be through a switch (and a fuse of course) in case you want to disable the TC lockup, if you do not have 12V to A then your trans is not going into TC lockup and you are causing the trans to heat up unnecessarily. The temp switch is open and...

Was the 700R4 built with a pressure switch to automatically lock the converter in 4th? If so you would usually have leads that would go to a lockup disable switch.