[Guest]

hi there.
I have an 88 commanche pioneer with the 8' bed. i believe this is relatively the same as an XJ.
it's a 4.0 with an automatic.

my problem is the tranny doesnt shift itself automatically, but if you move through the gears it will shift fine, but stays in that gear. from what i know a few years ago the tranny was replaced. I've been changing the tranny fluid regularly, so it's a nice reddish color. what has happened is it used to shift like sluggishly before it stopped. i was going through a toll booth and it felt like it was slipping. So dad brought it to a tranny place and he replaced a tranny computer. BAM, the thing was a hot rod, shifting just right. But that lasted for a few months and now it wont shift automatically again. So could it be possilbe that this module went again? it was a used piece.

I want to drop the tranny pan to verify the kick down cable is connected or didn't come apart.

anyone have any thoughts? or a place i can buy this module from? my dealer price was over 700 my cost (i work part time at my friends auto shop, not tranny specialists). I do not have any check engine light or anything, and the motor runs nice, has a firm shift when you shift by hand. so if you are in drive, it's drive and like a slug taking off, go to first and it's fine, just have to shift.

again, any ideas welcomed.

 

[Guest]

Dad was also told there is a wireing harness that connects to the throttle body somewhere that can be a culprit. he was told to get that from the dealer, around 100.

he told me tried another module (again used from the J-yard) and it was doing the same thing. so now i'm wondering if this module thing is good, and it's possibly that wiring harness. figured i'd add this incase someone here is knowledgeable on these trannies

 

[2719]

Assuming this is the AW4 transmission - which I think it is...
Rather than starting the the Tranny computer I would test to see if it is getting power. The computer is under the glove box. Pull the lower trim piece of the dash off and you will see it. Disconnect the wiring harness and test to see if there is current coming from the yellow wire (D16)when the ignition is on. If there is current I would suspect the computer. If not then trace that wire and see where it is shorting out or broken.

Some one please correct me if I am wrong, but I beleive this should work. Some people like to shift manaully at times and put a interupter switch on this wire to prevent the computer from working.

AW4 Mod webpage

Good Luck

 

[Guest]

thanks
i'll try to take a look at that. i like that page you linked in there.

just wondering if anyone else had issues like this?

 

[Guest]

Ok, looks like it's fixed, there was an inline fuse to that wired yellow color, fused looked good, but was actually broken, not allowing the voltage.

up and running.

that was a very helpful link you sent
THANKS a mil

 

[2719]

No problem - glad it fixed the problem