2008 3500 Express trans sketching out
#1
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I will start by saying, the transmission was completely rebuilt with all new parts but I don't think the guy replaced the speed sensors on the side of the transmission if I'm correct.. I floored it one time and the trans went into Free Will mode. The engine went to the limiter and as soon as I let off the throttle the trans caught.. since then it has shifted like it had a shift kit in it.. I replaced the sensors to no avail.
Since then, once in a while, the speedometer will get erratic and or not move. Once that happens it will not shift out of first gear by itself. I can manually shift from first to second but that's it.. if I drive for a little while it finally goes away. This mostly happens in cold conditions but it has happened a few times in hot weather
Help!!
Since then, once in a while, the speedometer will get erratic and or not move. Once that happens it will not shift out of first gear by itself. I can manually shift from first to second but that's it.. if I drive for a little while it finally goes away. This mostly happens in cold conditions but it has happened a few times in hot weather
Help!!
#2
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Never go to these rebuild guys. Always buy complete units from the big factories that supply everybody else, which have been dyno tested and come with a warranty. Now it'll have to come out again.
#3
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Never is a strong word. It's better to say, "ask around". I found an excellent AAMCO shop by asking several auto repair shops who they would recommend.
Don't rely on Yelp reviews. Went to a trans shop that had a 5 star yelp rating years ago. Turns out he knew nothing about GM electronic transmissions. After the third failure I took the car to my local Cadillac dealer. Got a factory rebuilt trans with a 3 yr / 36K warranty. Still running good 100,000 miles later.
Don't rely on Yelp reviews. Went to a trans shop that had a 5 star yelp rating years ago. Turns out he knew nothing about GM electronic transmissions. After the third failure I took the car to my local Cadillac dealer. Got a factory rebuilt trans with a 3 yr / 36K warranty. Still running good 100,000 miles later.
Last edited by og52; May 21st, 2022 at 11:44 PM.
#4
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