These ring and pinion sets will fit the following model years:
1932-1939 Packard V12
1927-1936 Packard Super 8's
RPM change calculations based on cruising speeds:
65 mph - 3090 RPMs (4.41:1 ratio)
65 mph - 2845 RPMs (4.06:1 ratio)
65 mph - 2508 RPMs (3.58:1 ratio)
Required Bearings and Races for installation:
Pinion Double-Row BRG #3509 (1 req'd)
Pinion Double-Row BRG #3505 (1 req'd)
Carrier Cone BRG #469 (2 req'd)
Carrier Cup BRG Race #452 (1 req'd)
Carrier Cup BRG Race #453a (1 req'd)
Benefits of choosing Hi-Speed Ring & Pinions:
Improved Fuel Economy
At cruising speeds on the highway, your antique engine will turn fewer revolutions with High-Speed Ring & Pinions. With this reduction of RPM on your engine, your fuel consumption can decrease anywhere from 10-20%.
Improved Driveability
With high-speed ring and pinion ratios, comes increased drivability for your antique automobile. Cruising speeds of 60-70mph are much more attainable for your want-to-be cross-country road warrior. This improved drivability will not only enhance your enjoyment with your vehicle, but it will also give you the confidence to enjoy your piece of automotive history more regularly.
Improved Engine Lifespan
Everyone loves to put as many miles on their dream machines as they can, but not at the extensive cost of wear and tear on your numbers matching drivetrain. With improved high-speed gear ratios in your rear end, turning fewer engine revolutions mean less taxation on your engine and it's internals.
