where is the TCU?? i guess im gonna check it next but dont know where its at....
yes i'm still trying to fix my 91 jeep transmission and its getting to the point were im ready to give up.....

things i've done so far.....

checked grounds
checked TPS
re-checked to see if plugs matched up

im stumped......please help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

older post to this one >>>VVVV
https://www.cherokeeforum.com/f2/new...7/#post1758373

 

I want to say it's behind the dash somewhere on the passenger side. Not positive though

 

That's where it is. Passenger side far right.

 

thank you... im gonna check it out monday i think. I got a volt meter reader thingy to check it out. im PRAYING that i can fix my problem finally!!!!!!
when i go to check it what should my readings be if anyone knows?

 

What's wrong with the trans?

 

Iknow on a 96 gc it is under center console.

 

ok well.... its a auto and when i put it in drive it acts like it is taking off in 3rd gear. so I put it down in 1-2 and it takes off fine! go to 3rd and it shifts than to drive once again...with no problems. So here i'am testing and re-testing.

 

if its starting out in 3rd when in Drive, its in limp mode. it'll go to limp mode if the 10A fuse (underhood junction block) is open, the transmission gets too hot, or the TCU is shot. it could possibly be a fault with the trans itself, solenoid stuck, etc, but from my experience the aw4 is a pretty reliable trans.

check the fuse, and if its ok check the cooler lines to & from the trans/radiator. if you've ever bottomed out your front suspension, the passenger upper control arm will hit the cooler lines & pinch them; had that happen on all 3 of my jeeps lol

 

thank you!! YES the AW4 is an amazing/reliable tranny. im going to check all of that... but how do i know if my TCU is shot?? i got a volt meter whats the normal amps when its running??

 

went under the passenger side dash and didnt spot anything that looked like a TCU....

anyone got a pic?

also checked the fuses... they are all fiiiiiiiiiiiiiiiiiiiiiiine.

 

decided to google some more stuff.... and this website is calling what i thought was a "TCU" a "TCM(TRANNY CONTROL MODULE).... so i've been asking for the wrong thing lol.....

......aaaaand if i only just searched for the right thing i'd see that its already been asked on CF..........someone just shoot me!!! xD

https://www.cherokeeforum.com/f2/where-heck-tcm-35961/

 

TCC signal goes through your brake switch. If the contacts are not closed when there's no pressure on the brake pedal the toque converter will not lock up.

Try lifting the brake pedal with your left foot while driving and see if the T/C locks up.

 

i'll give it a shot tomorrow.................... thanks

 

checked the peddle.. and still acting the same. Anyone got any idea how i check my TCM?