Question about 1998 GMC Sierra

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1998 gmc sierra slow shifting when cold acts normal when warmed up, 305 auto

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Have the transmission fluid and filter changed

Posted on Feb 26, 2009

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2002 gmc tranny slow to go in rev only when cold(-10) when oil warm no trouble, but on cold mornings can take 30 sec or more,but ok when oil warm-been this way for a few years


Is your fluid level low? Does it have a burnt smell - clutches burnt. Your trns filter may need changing and the oil replaced.

Nov 17, 2010 | 2002 GMC Sierra

2 Answers

1988 GMC Sierra shifts strange when cold normal when warm


You always add transmission fluid while the car is at running temps because transmission fluid expands when it's hot.

Jul 15, 2009 | 1998 GMC Sierra

1 Answer

1998 GMC Sierra (C1500) 5.0L 305 V8-right rear brake line


i dont know of any recall for that
and yes it can be replaced without removing the bedeasy wasy too do it is go too auto zone and buy a roll of brake line and run it along side of the old one and just leave the old one in the hangers and use tie straps too hang the new one!!!

Apr 20, 2009 | 1998 GMC Sierra

2 Answers

Trans. shifting problem


try a fluid and filter change and also a modulator valve and make sure you have vaccume going too it

Feb 27, 2009 | 1995 GMC Sierra C1500

1 Answer

Slow shifting when engine is cold


I have the same problem with my 97.... especially shifting from 3rd to O/D... I've had the tranny serviced and flushed.... It still does it until the tranny warms up.... the tranny's in them are temperature picky!!!!! It's the nature of the beast!!! Wait until spring and everything will be good until next winter!!! If you're really concerned with it you can put a "cold front" on it or block half (NO MORE THAN HALF) of the tranny cooler with cardboard thru the winter months

Feb 21, 2009 | 1998 GMC Sierra

1 Answer

1995 GMC Siera Truck Transmission


i gather its an auto transmission ,which mean your loosing oil pressure from the convertor inside the tranny housing.

Jan 22, 2009 | 1995 GMC Sierra C1500

1 Answer

Transmission slow to go into first gear unless auto is warmed up


change fluid & filter. no dipstick, sealed tranny. can remove both pans from underneath to access filter.

It is a GM 4L30E trans. used on Isuzu Rodeo and Cadillac Catera. BMW, in their inifinite wisdom, markets it as lifetime fluid. The second biggest bunch of **** advertising that ever was. Heat and friction will wear out ANY fluid!

BTW, it will delay shifting into highest gear when cold. this is normal

Dec 23, 2008 | 1998 BMW 5 Series

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