3 speed trans question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

davidh · 01-23-2009, 10:45 AM

Okay I pulled my tranny out with my motor yesterday. I wanted to drain the old fluid and add new. How much does it hold? what kind do you suggest? also is there a seal at the back of the trans tail shaft? I dont want to add to it and it all leak out say like a automatic. If I have to add to it when its back in the truck where do I do that? I just see a drain plug. 66 trans

TimE · 01-23-2009, 11:25 AM

I don't recall right off how much it holds. There should be a fill plug on the side of the tranny. Fill it until fluid just starts to run out and you're good to go.

davidh · 01-23-2009, 11:49 AM

Hmm. what about the something purple oil, 20W-50 stuff.?? purple maxx?

jason65 · 01-23-2009, 01:35 PM

Quote:

Originally Posted by davidh

Hmm. what about the something purple oil, 20W-50 stuff.?? purple maxx?

Isn't it Royal purple? My wife's son swares by it. But I haven't tried it.

*LILRED66* · 01-23-2009, 11:51 AM

Try posting a picture of the tranmission you have and you can get some good input on the model, fluid amount and type to use.

davidh · 01-23-2009, 02:31 PM

pics of tranny here

**MikeN** · 01-23-2009, 04:23 PM

Fill plug is on the opposite side from the side shown in the photos. The rear seal is easily replaced...pry the old one out with a screwdriver, and gently tap the new one in with a hammer. As stated above, fill it until lube just begins to dribble out of the fill hole. You need two bottle of plain old 80W-90 gear lube. Personally, I'd stay away from synthetics in an older tranny like that.

ol Curt · 01-23-2009, 04:39 PM

Are you sure that's not one the recovered aircraft engines from the Hudson?

MacAttack · 01-23-2009, 05:47 PM

Quote:

Originally Posted by MikeN

You need two bottle of plain old 80W-90 gear lube. Personally, I'd stay away from synthetics in an older tranny like that.

+1 (a waste of good cash)

01-23-2009, 10:45 AM	#1
davidh Senior Member Join Date: Feb 2004 Location: Ponca city now kingfisher Oklahoma Posts: 1,221	3 speed trans question Okay I pulled my tranny out with my motor yesterday. I wanted to drain the old fluid and add new. How much does it hold? what kind do you suggest? also is there a seal at the back of the trans tail shaft? I dont want to add to it and it all leak out say like a automatic. If I have to add to it when its back in the truck where do I do that? I just see a drain plug. 66 trans __________________ Even the nicest dodge-chrysler is only 2years away from being parked outside of Section 8 housing.

01-23-2009, 11:25 AM	#2
TimE Hey Y'all!! Join Date: Dec 2007 Location: Bay Minette, Alabama Posts: 1,755	Re: 3 speed trans question I don't recall right off how much it holds. There should be a fill plug on the side of the tranny. Fill it until fluid just starts to run out and you're good to go. __________________ Just hopin' I live long enough to finish something!!!

01-23-2009, 11:49 AM	#3
davidh Senior Member Join Date: Feb 2004 Location: Ponca city now kingfisher Oklahoma Posts: 1,221	Re: 3 speed trans question Hmm. what about the something purple oil, 20W-50 stuff.?? purple maxx? __________________ Even the nicest dodge-chrysler is only 2years away from being parked outside of Section 8 housing.

01-23-2009, 11:51 AM	#5
LILRED66 Account Suspended Join Date: May 2005 Location: Kansas City, KS Posts: 3,906	Re: 3 speed trans question Try posting a picture of the tranmission you have and you can get some good input on the model, fluid amount and type to use.

01-23-2009, 02:31 PM	#6
davidh Senior Member Join Date: Feb 2004 Location: Ponca city now kingfisher Oklahoma Posts: 1,221	Re: 3 speed trans question pics of tranny here Attached Images __________________ Even the nicest dodge-chrysler is only 2years away from being parked outside of Section 8 housing.

01-23-2009, 04:23 PM	#7
MikeN Senior Member Join Date: Oct 2007 Location: Marietta, GA Posts: 803	Re: 3 speed trans question Fill plug is on the opposite side from the side shown in the photos. The rear seal is easily replaced...pry the old one out with a screwdriver, and gently tap the new one in with a hammer. As stated above, fill it until lube just begins to dribble out of the fill hole. You need two bottle of plain old 80W-90 gear lube. Personally, I'd stay away from synthetics in an older tranny like that.

01-23-2009, 04:39 PM	#8
ol Curt Junior Member Join Date: Dec 2006 Location: Newburgh, IN Posts: 1,247	Re: 3 speed trans question Are you sure that's not one the recovered aircraft engines from the Hudson?

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