Reproduction Parts for 1916-1964 Chevrolet Passenger Cars & 1918-1987 Chevrolet & GMC Trucks



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#442332 05/06/20 07:20 AM
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IRR96 Offline OP
Grease Monkey
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good morning,i removed my transmission in my 1946 gmc 1/2 ton that I just bought a month ago to replace the flywheel ring gear,want to change the trans and rear end oil,its a 3 speed trans and 4.11 rears,i,m hearing 90wt mineral oil for trans and 90 wt multi purpose gear for the rear,is this what everyone recommends ?


william a gove
Filling Station - Chevrolet & GMC Reproduction Parts


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IRR96 #442333 05/06/20 07:30 AM
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Just put 90/140 in both.

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IRR96 Offline OP
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thank you,would synthetic be be better ?


william a gove
IRR96 #442369 05/06/20 08:16 PM
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No but it will cost more. It may provide you with a sense of well being but the transmission and differential could care less if it's synthetic or not. They got no money.

Best,

Charlie computer

IRR96 #442370 05/06/20 08:32 PM
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While the synthetic oil does have some benefits over conventional oils you most likely will never put on enough miles on the 46 to notice any.


Steve D
IRR96 #442379 05/06/20 10:26 PM
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iagree


Gene Schneider
IRR96 #442435 05/07/20 10:35 PM
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Make sure it says it is ok for yellow metal. Brass synchro's.


1946 Chevy 3100 1/2 Ton Pickup Purchased 11/18/17 Sold 9/20
1948 Chevy Fleetmaster Coupe, Purchased 6/20/2010
1965 Chevy ll 350 Purchased Feb 2021. 3-speed Saginaw Hurst Floor Shifter 3.08 Rear End

2019 Ford Ranger Lariat Super Crew

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