Diff ratio stamps/markings?
Thread Starter
Race Director
Joined: Dec 2007
Posts: 14,345
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From: Hartselle AL
St. Jude Donor '09
Diff ratio stamps/markings?
I feel really stupid asking this :o But does anyone have a picture or better explanation of exactly where the differential stamps/markings are located to tell me what gear ratio I am running?
Everything I have found through search and reading is it is supposed to be on the lower/bottom area of the diff housing, but I can't seem to find mine.
It's a bone stock 78 L-82 4 speed.
Thanks.
Everything I have found through search and reading is it is supposed to be on the lower/bottom area of the diff housing, but I can't seem to find mine.
It's a bone stock 78 L-82 4 speed.
Thanks.
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Joined: Oct 2005
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From: Dallas TX
Thread Starter
Race Director
Joined: Dec 2007
Posts: 14,345
Likes: 4
From: Hartselle AL
St. Jude Donor '09
TexasFlight, thanks had already found that site along with several others listing the same info.
Am asking as I am in the research/shopping stage for a possible 5 speed upgrade and the vendor is recommendation is different if the ratio is above or below 3.50:1
Am asking as I am in the research/shopping stage for a possible 5 speed upgrade and the vendor is recommendation is different if the ratio is above or below 3.50:1
Melting Slicks
Joined: Dec 2000
Posts: 3,363
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From: Lansdale 19446 PA
2024 C3 of the Year Finalist- Unmodified
St. Jude Donor '10-'11, '15, '19
If you look at lower lip of the diff where it meete the diff cover, ther should be a couple letters stamped adjacent to the cover. Not on the cover. You may have to wire brush the bottom to read the stamped letters.
If the diff is 1978 stock:
OK = 3.08
OM = 3.36
OH = 3.55
OJ = 3.70
John
If the diff is 1978 stock:
OK = 3.08
OM = 3.36
OH = 3.55
OJ = 3.70
John
