I have a 1981 2WD GMC Sierra Classic automatic and I just got the engine replaced yesterday with a 350. When I drive the vehicle, it seems like its not shifting into second gear. The engine revs really high and just stays in 1st gear. Eventually after awhile the truck makes a clunking noise and lunges forward and finally switching into second, but stays in second. Before this it just reved really high and changed, but after I filled up the tranny fluid after it was very low, this problem was produced.
I know for a fact that there is no leaking either. Where could the fluid gone :P
What ya think the problem is?
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Sunday, March 5th, 2006 AT 11:19 PM