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Rear Gear

Forum: C3 Engines, Driveline and Handling

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Rear Gear

Posted: 8/12/13 4:49pmMessage 1 of 3
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Lake Ariel, PA - USA
Joined: 7/22/2012
Posts: 8
Vette(s): An original L-48 1977 Vette. Everything is original with 19,000 miles
Hi,
Would anybody know what the gear ratio of the rear end on a stock 1977 C-3 350, automatic would be? Thank you.
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Re: Rear Gear

Posted: 8/12/13 5:51pmMessage 2 of 3
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Woodland, WA - USA
Joined: 10/14/2003
Posts: 1171
Vette(s): 1977 T-Top,350,Auto Black Ruby Pearl,Steeroids R&P conversion
I think 4 Sp 3.36:1 Auto 3.08:1
 
Here are the codes if you can get the ID of the differential
 
OA 3.08:1
OD 3.36:1
LR  3.36:1
OB 3.55:1
OC 3.70:1
 
 
 


|UPDATED|8/12/2013 5:51:33 PM (AZT)|/UPDATED|
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Re: Rear Gear

Posted: 8/12/13 7:47pmMessage 3 of 3
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Duncanville, TX - USA
Joined: 11/8/2003
Posts: 22715
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas
Depends on the engine...
The L48 only had the 3.08 rear gear set, while the L82 had the 3.55 rear gears. The L48 also only came with the 350 trans, but the L82 came with the 400 trans. 
If you want to crawl under it(or put it on a lift), you can check the codes stamped on the bottom, and see what it had originally. That doesn't mean that's what it has now, since a lot of rear gears have been changed over the years, so the only real way to know for sure what it has is to open it up and look. Thumbs Up

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