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95 cadillac sts tans shifting problem joe 2-3-13  
My 95 sts just started having a trans shifting issue, when i drove it today it would get to 40 mph and then rev out and wouldnt shift to the next gear. I checked the fluid and it was full, i drive it yesterday and it was fine and then today it wouldnt shift. Any ideas thanks,
Re: 95 cadillac sts tans shifting problem BUBBA THE BUS TECH 2-4-13  
There a hundred things it could be, but it is most likely a "One Way" has failed inside the trans.

This means teardown and repair. Probably an overhaul.

Good Luck
Re: 95 cadillac sts tans shifting problem Phil Feinstein 2-5-13  
40MPH tells a lot about what is going on. At 40, the torque converter lockup (TCC) engages. If the solenoid itself was a problem, there would be a code set. the "Check Engine" light may not come on, however so you'd need to use a scan tool to find if a code for the TCC is set.

If there is a code, the solenoid has either failed or there is a wiring problem. No code and that means the lock up has failed in the torque converter or the front pump may be failing or you could have low line pressure from a clogged filter.

Recommendation: check for codes. If you don't find any codes, change the fluid and filter. Be aware that if the fluid comes out black (particles) or brown (burnt), then new fluid will only make the transmission worse and you will need a rebuild. If you do find codes, fix those first before anything else.

Hope that helps!
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