Akmj90 Posted January 3, 2016 Share Posted January 3, 2016 So I have a 1990 4x4 with the 4.0 and a auto it was running great until I took it into the car wash and now the Comanche will not shift out of first. I checked the fuse and got underneath it and found nothing obvious disconnected. Does anyone have any ideas? Thanks Link to comment Share on other sites More sharing options...
Crash Posted January 3, 2016 Share Posted January 3, 2016 Check/adjust/replace TPS. Disco TCU and attempt to shift manually. Adjust TV cable. Etc. Link to comment Share on other sites More sharing options...
gogmorgo Posted January 3, 2016 Share Posted January 3, 2016 There are a couple others threads about similar issues from this week. Worth a read. Link to comment Share on other sites More sharing options...
64 Cheyenne Posted January 4, 2016 Share Posted January 4, 2016 Had this issue once on an XJ, cleaned/dried connectors at TB, problem went away. Link to comment Share on other sites More sharing options...
Akmj90 Posted January 6, 2016 Author Share Posted January 6, 2016 Well I just unhooked and sprayed down the connectors of the tps, no luck as of yet. I disconnected the fuse to the tcu and it does not allow me to shift manually. Still trying stuff out. Link to comment Share on other sites More sharing options...
Akmj90 Posted January 6, 2016 Author Share Posted January 6, 2016 Well I found out I pulled the wrong tcu fuse I found the real one and sure enuff I pull it and not I can shift it manually so my best guess is I need a new tcu. Link to comment Share on other sites More sharing options...
64 Cheyenne Posted January 7, 2016 Share Posted January 7, 2016 Still think you should swap out the TPS, it's a common symptom for AW4 not shifting. Link to comment Share on other sites More sharing options...
gogmorgo Posted January 7, 2016 Share Posted January 7, 2016 Forgot that.^^^ When my tps went, the first clue was that my aw4 was shifting as though I had the skinny pedal firmly against the floor. It did shift, but only after sitting on the rev limiter for a bit. Link to comment Share on other sites More sharing options...
64 Cheyenne Posted January 7, 2016 Share Posted January 7, 2016 Forgot that.^^^ When my tps went, the first clue was that my aw4 was shifting as though I had the skinny pedal firmly against the floor. It did shift, but only after sitting on the rev limiter for a bit. When I bought the 98 XJ, thats how the girl drove it....against the rev limiter, changed TPS, all was good. Link to comment Share on other sites More sharing options...
MJCARENA Posted January 8, 2016 Share Posted January 8, 2016 Did you wash the engine down. I had the same problem on my XJ after cleaning the engine. There is a connector for the trans on the passenger side of the engine that got wet ,and when I took it apart and dried it all was well again. Link to comment Share on other sites More sharing options...
Akmj90 Posted January 8, 2016 Author Share Posted January 8, 2016 I just drove it through a automatic car wash in November in Alaska then I shipped the Comanche had it delivered to my door a month later and it did not magically fix it's self for some reason..... I am trying to track down a tcu now, I will look at the plug on the passenger side of the engine now. Link to comment Share on other sites More sharing options...
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