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Joined: Oct 2007
Posts: 397
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Can someone please instruct me on how to service (not remove/rebuild) a vintage 1946 three speed manual transmission? I have never done this before and need to find out how one checks the lubricating fluid, where the access points are for servicing etc. I don't have a clue at all of what I'm looking at. I think the unit is OK by the way it works, but until I mess around with it I really won't be able to tell just what condition it truely is in. I really don't want to pull it if I don't have to. Seems to function alright, just sounds a bit noisey but that could be the nature of the beast. Any helpful tips to guide me through this will be greatly appreciated.


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David Wolff
1946 Chevy 1/2-ton
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There should be a square pipe plug about half way up on the passenger side of the tranny. Remove that plug and fill with 90w gear lube until it starts running out of the plug hole. In stall plug and your done. That will tell you that the tranny is full of lube. The noise is probably normal for that old of truck. This might make the transmission a little more quiet also.

Last edited by 235 Fat Fenders; 12/05/2007 10:48 PM.
Joined: Oct 2007
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Thanks Tom!

BTW, is there any kind of drain plug to drain out the old transmission fluid before I add new fluid?


"Lucille" ..... Proud Member of the "Southern Stovebolts"

David Wolff
1946 Chevy 1/2-ton
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Yes. There is a similar plug on the bottom you can drain out the old grease.


They say money can't buy happiness. It can buy old Chevy trucks though. Same thing.
1972 Chevy c10 Cheyenne Super
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George,

Thanks for the info about the drain plug. Hopefully "something" will come out of there when I open it! I'm catching up on a whole bunch of neglect.


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David Wolff
1946 Chevy 1/2-ton
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Use a paint strainer to get an idea of what is coming apart inside.


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