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73 automatic transmission, 190 HP, nothing fancy. Assuming everything is still standard, what is my gear ratio. I can't find the numbers on the case.
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My book shows standard as a 3.36:1 with optionals of 3.70:1, 3.08:1, 3.55:1 and 4.11:1. Personally I thought the standard ratio was 3.08:1. Put it in the air and give it a spin.
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Duncanville, TX - USA
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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
Most automatic L48s had the 3.36 ratios, but the 3.08 is the standard ratio...
These are the only two ratios available for the 400 with the L48.
The axle code(s) will be on the very bottom of the diff., just in front of the spring, close to where the cover bolts onto the diff housing.
AW = 3.08
AX = 3.36
LR = 3.36Adams' Apple 2006-10-19 18:31:41
These are the only two ratios available for the 400 with the L48.
The axle code(s) will be on the very bottom of the diff., just in front of the spring, close to where the cover bolts onto the diff housing.
AW = 3.08
AX = 3.36
LR = 3.36
Joel Adams
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mine came with a auto and the 3.08 gears. I replaced it with a 3.55 even before I put in the od trans. What rpm's do you see at 70mph? With the 3.55 I was almost 3300rpm's. with a 3.08 you should see around 2700rpm's. Here is a calculator: http://richmondgear.com/101032.html
Brian - NCM Lifetime Member
73 coupe L48, Flat-top pistons, Performer RPM Heads, Crane Cam and roller rockers, Holley 650 vac sec. Performer intake,
3.55 gear BTO 200-4R trans,
Leather seats, Seatbelt Plus 3point seatbelts, Pioneer CD player
Magnaflow Exhuast System
Dewitt radiator and dual electric fans
Borgeson Steering box
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in Forum: C3 Engines, Driveline and Handling
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