my 88 xj will not shift on its own. aw4

[jimbone]

As title says, it just won't shift. When u put it in od its in od. When in drive its in drive. Only in low 1-2 does it go into 1st. When u take off in low 1-2 it stays in low, never changes into 2nd at all. So I manually upshift into drive and it skips 2nd totally and goes directly into drive. When I upshift to od it feels like the torque converter just locks up w/o ever actually shifting into od. I've replaced the trans, the control module, and neutral safety switch w/o the slightest improvement. Does anyone have any idea what's going on? By the way all parts I swapped were used. Thanks for any advice.

 

[transman731]

tps?

 

[jimbone]

Thanks transman. I didn't see that coming. Tps stands for throttle position sensor I'm assuming.

 

[transman731]

yes, also check you vehicle speed sensor

 

[jimbone]

Thanks for the ideas gonna try them out this afternoon.

 

[jimbone]

Well the tps is a no go. The original sp sensor was pulled w the tranny. I used the sp sensor that came w the other trans, so its not original either. Any other suggestions?

 

[upnover]

TCM(transmission control Modula)
Or and transman can tell you what it was I ordered from him, but there are some switches and solenoids inside the transmission that can have this affect. Chris at Buckeye 828-779-2242 Performance changed mine out, and it shifted perfect!