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Username Post: Trans diagnosis        (Topic#351962)
Posts: 135

Loc: Arkansas
Reg: 09-12-10
07-10-18 03:14 PM - Post#2739603    

I have a 1993 Suburban k1500. I am the original owner. I have 268,000 miles. I was about to have my trans rebuilt but after reading about it's common problems it may be a simple fix. The truck was meticulously maintained with regular trans fluid and filter changes at intervals of the severe service schedule and the vehicle has never seen severe service. Think soccer mom.

Here are the symptoms:

1. It seems to be stuck in second gear. I think it starts out in second gear because I can't discern a shift, under load or otherwise. The engine is turning quite a few R's to get it going but it doesn't "break loose" and slip like being out of gear. Eventually ( after 50 feet or so) the truck catches up with the engine. It runs about 50 MPH at 2100 RPM on stock size tires. Normally it runs 70 MPH at 1900 RPM.

2. It's totally normal in reverse.

3. it doesn't display the symptoms of a bad 3/4 clutch pack because it doesn't shift out of 2nd and spin like out of gear..

4. It doesn't display the symptoms of a bad drive shell because it has reverse, and is strong.

5. It doesn't display the symptoms of a ttc valve because the check engine light is off.

Any ideas of what might be the culprit or at least what to check out?

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