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08-01-2018, 01:10 PM | #1 |
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Join Date: Aug 2017
Location: ohio
Posts: 986
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overdrive gear oil
This has probably been beat to death, but, can i use 140 instead of 90 in my 1952 o/d tranny? It leaks a little & i'm think'n the heavier stuff may help . ?
Only driven in 60 to 85 degree weather. Thanks guys !!!!!!!!!!! mike |
08-01-2018, 03:33 PM | #2 |
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Join Date: Jun 2010
Location: San Antonio, Texas
Posts: 16,436
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Re: overdrive gear oil
It might help with leaks but it may not help with function. The transmission and overdrive have different fill ports but they still basically share oil. GL-4 is the mild EP API rating that replaced GL-3. GL-5 rated hypoid lube is a no-no in the old BW electric OD transmissions.
The cooler it gets the thinner you use. If it's leaking real bad, you may consider repairing the leak. Most of them weep a bit but not a lot. SAE-140 might make your shifting sluggish. |
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08-01-2018, 04:07 PM | #3 |
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Join Date: Aug 2017
Location: ohio
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Re: overdrive gear oil
Thanks rotorwrench ! Is it possible to over fill a B/W trans.?
By the way; love the B 17 avatar. Knew a guy who was a tail gunner in one; the skip ground looped it and whacked the tail section off. My friend crawled out with a few scratches & dizzy from the spinning of the tail section. Thanks again, mike |
08-01-2018, 04:52 PM | #4 |
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Join Date: Jun 2010
Location: San Antonio, Texas
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Re: overdrive gear oil
It is possible. They give an exact amount in the Ford manuals. A lot of folks fill till it's at the bottom of the fill port but in most cases that's more than the amount they call out. A person has to measure the amount they put in and most folks don't do it that way.
The B-17 was the Miss U. My Pop and crew flew it over to Italy from the USA and on a lot of their missions over Europe during the war. It made it over and all the way back but was wrecked after it came back to the USA. |
08-01-2018, 04:55 PM | #5 |
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Join Date: Jun 2013
Location: Reno
Posts: 171
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Re: overdrive gear oil
GL1 is the proper gear oil. You can get it at NAPA. Leaks will continue until you change the gaskets and or seal, not the grease.
Stryker |
08-01-2018, 06:48 PM | #6 |
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Location: San Antonio, Texas
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Re: overdrive gear oil
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