Wanted: TCU for 1996 XJ

[Seeker]

Anybody have a spare TCU lying around they want to sell me. They didn't have any newer than 91' at the boneyard today. My says 56041016 on it... thanks. I think 92-96 maybe newer will work.

 

[harrahs23]

Hope this doesn't sound dumb but what's a TCU?

 

[GrimmJeeper]

Hope this doesn't sound dumb but what's a TCU?

transmission control unit, on the 96 and earlier models it is a small silver box mounted to the lower dash panel on the passenger side under the glove box and it controls the shifting of the transmission.

 

[xcm]

No stupid questions, only stupid answers.

 

[Seeker]

So I have a stupid question... does the serial number have to match on the tcu's? I am trying to diagnose if the problem is the transmission or the tcu. My buddy picked up a couple at ecology from 91's (all they had) but it is still having trouble shifting in OD. Each box did something reacted different so I am hoping that it will fix it with the right tcu. Do I need to reset computer? I thought it was plug and play

 

[GrimmJeeper]

96 is a pain in the ass year unfortunately, some of them got the early 95 and earlier wiring and programming, and some of them got the later 97+ parts. 96 was the first year of OBDII on the XJ and is kind of a crapshoot as to whether you got the early or the late model parts depending on when it was built and what they had laying around.

I would say that anything from 92-96 should work fine but because it's a changeover year I can't say for sure. do you have access to alldata or a factory service manual? it's possible you have a shift solenoid failing in the transmission and there are procedures in the manual to test them.

 

[Seeker]

thanks!

 

[Seeker]

Another quick question. Did any of the 96 have a fuse for the tcu? I read some years did. Just want to cover my bases.