Question about 1992 GMC Sierra
Your highway acceleration problem could be a coil problem. Not sure if that year of chev has coil packs or not but experienced same thing with ford 5.4L. went through 3 coil packs and did the same thing each time before biting the dust. Transmission seems to be sticking on the 1to2 upshift and could be a sticking solenoid in the valve body of the tranny. If the shifting problem persists then the tranny deffinately has to be rebuilt. It's made it quite far if tha is the original tranny, you cant expect too much life out of it if it has been worked hard. I highly doubt a fluid change would help at all. Or if you want, you can buy a can of new truck from GM for about 25 to 35 thousand bucks! Typically works great!
Posted on Oct 19, 2009
The vibration may not neccessarily be coming from the transmission,sometimes when the cooling fan clutch bearings go bad it will vibrate as well,is the fan seem loose?But,that truck has a 700r4 transmission and ive heard of alot of them with mileage over 130,000 MILES shifting weird and\or losing overdrive.
Posted on Apr 23, 2009
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Posted on Jan 02, 2017
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