1989 Silverado S2500 Tranny only works after 15 minute warmup???

michelschevy · 12-08-2005, 08:43 PM

I'm considering buying a 1989 Silverado with Automatic Tranny.
It wouldn't move in any gear until it warmed up 15 minutes. All gears
worked after that warm up time. The ATF was a bit on the low side but
I don't think that the ATF level was the problem although I have no clue.

Does anyone have any experience with this or have any suggestions?
Thanks!

michelschevy · 12-08-2005, 08:48 PM

Forgot to add that it is a two wheel drive...

mrjohnwayne · 12-08-2005, 08:51 PM

Plan on rebuilding the tranny if you do buy it. Depending on how low it was it could be a major issue as well.

YngPiggyZ71 · 12-13-2005, 11:48 PM

Sounds like the tranny is full of sludge. Id start with a complete tranny flush and seal check, may an internal seal leak. Depending on the mileage, you might just want to dump the tranny and go with a remanufactured one. Stay away from rebuilts, unless you personally know the builder and trust him and his work or youll be replacing the tranny again in a year or two. Start out small and have a local shop pressure test your tranny and its seals. If its a seal problem then go ahead with the repair and make sure they clean out all of the old fluid and particals.

Keep 'em rollin!!!

gmtech · 12-30-2005, 11:32 PM

seals are probably hard, will need to be rebuilt. Some of the trany additives my the seals more pliable for awhile but its not a long term fix

chevyguy · 01-02-2006, 12:09 PM

I agree with gmtech. Just leaking back and unable to hold pressure

gmctrucks · 12-12-2006, 03:41 AM

Change fluild and add LUCAS transmission addivtive im a true believer of it it fixed my wifes van it was slipping bad cheaper than replacing the trans. Do a search on LUCAS and read what people have written about it this stuff is GREAT.

DonEllis · 12-12-2006, 08:52 AM

I hope the guy selling it is willing to knock some off the price for a bad tranny
take the money you save to put toward having tranny replaced
can try to have flushed and new filter and keep money in bank till it goes out
Don

mudseeker · 12-13-2006, 06:20 AM

year old!

12-08-2005, 08:43 PM	#1
michelschevy Junior Member Join Date: Dec 2005 Posts: 2	1989 Silverado S2500 Tranny only works after 15 minute warmup??? I'm considering buying a 1989 Silverado with Automatic Tranny. It wouldn't move in any gear until it warmed up 15 minutes. All gears worked after that warm up time. The ATF was a bit on the low side but I don't think that the ATF level was the problem although I have no clue. Does anyone have any experience with this or have any suggestions? Thanks!

12-08-2005, 08:51 PM	#3
mrjohnwayne Moderator Join Date: Apr 2005 Location: Texas Posts: 3,114	Plan on rebuilding the tranny if you do buy it. Depending on how low it was it could be a major issue as well. __________________ John Wayne 2000 F-350 7.3L Powerstroke 4x4

12-13-2005, 11:48 PM	#4
YngPiggyZ71 Full Member Join Date: Mar 2005 Posts: 12	Tranny woes! Sounds like the tranny is full of sludge. Id start with a complete tranny flush and seal check, may an internal seal leak. Depending on the mileage, you might just want to dump the tranny and go with a remanufactured one. Stay away from rebuilts, unless you personally know the builder and trust him and his work or youll be replacing the tranny again in a year or two. Start out small and have a local shop pressure test your tranny and its seals. If its a seal problem then go ahead with the repair and make sure they clean out all of the old fluid and particals. Keep 'em rollin!!!

01-02-2006, 12:09 PM	#6
chevyguy Senior Member Join Date: Sep 2005 Location: ALABAMA Posts: 3,160	I agree with gmtech. Just leaking back and unable to hold pressure __________________ When i die, i dont want to walk gracefully thu the pearly gates and turn in a unused body. i want to go sliding thru sideways and turn in a body that has been completely used up.

12-13-2006, 06:20 AM	#9
mudseeker mod-o-tator Join Date: Feb 2006 Location: michigan Posts: 4,059	year old! __________________ member map add yourself

12-08-2005, 08:48 PM	#2
michelschevy Junior Member Join Date: Dec 2005 Posts: 2	Forgot to add that it is a two wheel drive...

12-30-2005, 11:32 PM	#5
gmtech Senior Member Join Date: Dec 2005 Location: farmville Va Posts: 343	seals are probably hard, will need to be rebuilt. Some of the trany additives my the seals more pliable for awhile but its not a long term fix

12-12-2006, 03:41 AM	#7
gmctrucks Senior Member Join Date: Nov 2006 Location: Houston,Texas Posts: 1,722	Change fluild and add LUCAS transmission addivtive im a true believer of it it fixed my wifes van it was slipping bad cheaper than replacing the trans. Do a search on LUCAS and read what people have written about it this stuff is GREAT.

12-12-2006, 08:52 AM	#8
DonEllis Full Member Join Date: Nov 2006 Posts: 10	I hope the guy selling it is willing to knock some off the price for a bad tranny take the money you save to put toward having tranny replaced can try to have flushed and new filter and keep money in bank till it goes out Don

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