Question about 1998 Chevrolet C1500

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Has Trouble Shifting in any gear, and shifts hard!

Got a 99' 1500 Silverado 4x4 that got stuck in some mud, got it out and the fuel pump went out. I changed that out, and now the trannsmission is haveing a hard time. when i start her up it idles at 1000rpms, naturally she stays at 550 rpms. However when i throw it in any gear she drops back down to 550rpms. When I take of at any speed weather slow or fast it shifts real high and really hard. I have a number of things i could think of being the problem, just need an extra opinion please!

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  • racinggoddes Sep 09, 2009

    Not always in 4x4 infact the transfercase definatly needs some work done on it. Pryer to the fuel pump going out was running just fine, guessing somewhere it may have sucked something up when or may of overheated the tranny. It has a 4L60E in her, and has history lol bad sign right, Have a shift kit in it, had to back the pressure off because it shifted hard, then was normaly for awhile then the Pump went out on it had that replaced and now im back to the shifting hard. While it was in the mud it sank down to the skid plates before we broke the backhoe out to pull me out.

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Well i guess check your vaccum lines. Is it always in 4x4 or can u switch out to rear. If so unlock it by putting it in reverse from 4 wheel to 2 wheel then go forward. Maybe you clogged the tranny maybe a flush might help what about the transfer case maybe it needs a good cleaning? just guesses

Posted on Sep 09, 2009

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Posted on Jan 02, 2017

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