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Avanti rear axle gear ratio

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  • Avanti rear axle gear ratio

    I am considering replacing the 3.73 gear set in my 1964 R-2. How many different ratio's were available as stock items and what would the best combination be for highway speeds. I have an extra set of 3.3 (43 ring & 13 pinion) gears that came with the car. Any suggestions?. Floyd

  • #2
    quote:Originally posted by floydjaehnert

    I am considering replacing the 3.73 gear set in my 1964 R-2. How many different ratio's were available as stock items and what would the best combination be for highway speeds. I have an extra set of 3.3 (43 ring & 13 pinion) gears that came with the car. Any suggestions?. Floyd
    Auto or 4 speed? If 4 speed close or wide ratio?

    The best for highway speeds ONLY would be as low numberically as you can get...maybe 2.90's or so. The problem with that is you wouldn't have a good time getting the car moving with a 4 speed and it would feel pretty doggy up to 40MPH or so even with the auto.

    The 3.31's you have would be a pretty good compromise for an auto.

    I wouldn't go below 3.73's with a close ratio 4 speed (2.20 low) or below 3.54 with a wide ratio box (2.54 low).



    Dick Steinkamp
    Bellingham, WA

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    • #3
      Dick: Thank you for your reply, my R-2 has an automatic transmission. I would'nt want the car to be a complete dog in town so I will run the 3.31 ratio past my mechanic. Floyd

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      • #4
        My Avanti had the 3:73s in it also when I got it, it was a "peg-leg"
        and revved too high on the freeway. I swapped axles with my Hawk when
        I totalled the Hawk, it had a 3:31 twin traction axle. Even with the
        T-86 3 speed stick, the car is much more well behaved, and still has
        enough pick-um-up to beat a new Chevy Colorado after I gave him a head
        start off the line. Its 'only' an R1.[:I]

        Tom

        1963 Studebaker Avanti, 102,000, custom made brake brackets to mount 1998 Mustang GT 4 wheel disc brakes (soon to get 13" Cobra front brakes, 2003 Mustang Cobra 17" wheels, GM altenator, will be getting : 97 Camaro Z28 tan leather seats, 97 Camaro Z28 T-56 6-speed trans, Ported 'R3' style Avanti heads with stainless full flow valves, 'R3' 276 duration cam w/chrysler solid lifters, shortened push rods, aluminum cam gear, Edelbrock AFB Carb, GM HEI distributor, 8.8mm plug wires, waiting in the garage.
        '63 Avanti R1, '03 Mustang Cobra 13" front disc/98 GT rear brakes, 03 Cobra 17" wheels, GM alt, 97 Z28 leather seats, TKO 5-spd, Ported heads w/SST full flow valves.
        Check out my disc brake adapters to install 1994-2004 Mustang disc brakes on your Studebaker!!
        http://forum.studebakerdriversclub.c...bracket-update
        I have also written many TECH how to articles, do a search for my Forum name to find them

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