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Re: OT Help Truck Transmission Problems!
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Posted by Brokenwrench on December 04, 2006 at 08:41:42 from (69.128.198.218):
In Reply to: OT Help Truck Transmission Problems! posted by Mike in Ind. on December 03, 2006 at 19:01:02:
Hey Mike,
A delayed upshift cold almost certainly doesn`t point toward an internal tranny problem. Get it somewhere where they can do more than just pull codes(chances are there won`t be any).
If it were here, the first thing I would do is let it cool down, then hook a scanner up and watch the live data. I`d watch all the inputs that affect shift timing, if everything looks good, which it probably will, I`d haul her down to a GM dealer and ask them to reflash the computer with the latest calibration or if there are any recals that deal with that specific problem. If anything, it`s relatively inexpensive and surely doesn`t hurt anything.
Alot of shift timing problems are calibration issues on these trucks. Trucks in the same model year can have hundreds of different program calibrations.
I wouldn`t get into putting anything in the oil. Anymore, with all the eletronics, alot of the additives can really raise heck with things.
Most are highly acidic, or create alot of sludge.
Anyway, I wouldn`t get too worried about this being an expensive fix. Hope this helps and let us know if you find the solution to the problem. Brokenwrench
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