How long can you store a trans? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

D13 · 12-01-2017, 02:25 PM

I'm looking at downsizing my parts collection and building a truck my way. One of those steps is rebuilding some of my auto trans'. But I know it will be a while before I use them. How long can one sit on the shelf before all the internal seals need to be replaces due to taking a set? Is there some trick Like using transgel on the seal lips) to extend this time? Shaft Teflon seals? Talking 700R4 and particularly my 2004R's.

68gmsee · 12-01-2017, 07:25 PM

I'm sort of interested in this post also. I have a TH350 that has been sitting unused for about 5 years.

I will say that this same transmission was in a 75 impala for about 2 or 3 years without being used and ran perfect when I installed it in my 69 Chevy truck. Also, my next door neighbor installed a salvage yard transmission in his Dodge truck that sat in the yard for several years and ran great.

My guess is it depends on the condition of the transmission before storage and how well it's sealed so moisture doesn't get inside.

GASoline71 · 12-01-2017, 07:48 PM

External seals? Some O-rings (dip stick tube and kickdown/TV cable) and a front and rear shaft seal? Just replace the seals and O-rings when you're ready to huck it back in a rig.

Gary

12-01-2017, 02:25 PM	#1
D13 Registered User Join Date: Feb 2007 Location: Memphis MI Posts: 1,851	How long can you store a trans? I'm looking at downsizing my parts collection and building a truck my way. One of those steps is rebuilding some of my auto trans'. But I know it will be a while before I use them. How long can one sit on the shelf before all the internal seals need to be replaces due to taking a set? Is there some trick Like using transgel on the seal lips) to extend this time? Shaft Teflon seals? Talking 700R4 and particularly my 2004R's. __________________ 1987 2 ton 1982 250/TH350 beater in progress Dad's 1981 3/4 L6 3 on tree posi and no options, awaiting restoration or scrapping Plus a mess o' tractors

12-01-2017, 07:25 PM	#2
68gmsee Active Member Join Date: Jul 2007 Location: Centrally located between Houston, Austin and Waco. BCS area. Posts: 7,947	Re: How long can you store a trans? I'm sort of interested in this post also. I have a TH350 that has been sitting unused for about 5 years. I will say that this same transmission was in a 75 impala for about 2 or 3 years without being used and ran perfect when I installed it in my 69 Chevy truck. Also, my next door neighbor installed a salvage yard transmission in his Dodge truck that sat in the yard for several years and ran great. My guess is it depends on the condition of the transmission before storage and how well it's sealed so moisture doesn't get inside. __________________ 68 GMC 250/3 speed Saginaw p/b p/s 69 Chevy 350/350 currently in pieces still lookin for a cab 06 Trailblazer I just want a vehicle that I can work on, that won't talk to me, leave error msgs or keep track of how I drive...



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