The RAM Coupler is a compact, lightweight clutch system featuring splined lock-up engagement. The cone clutch provides the initial engagement to get the vehicle moving when the clutch pedal is depressed. Positive lock-up is achieved when the pedal is released and the splined cone engages the splined top plate. The RAM Coupler is just five pounds and 4 ¾ inches in diameter - about the size of the crank flange itself! RAM recommends that the coupler be used in vehicles under 2600 pounds, or with adequate low gearing to avoid overloading the cone clutch.
A few things to consider:
Car weight and gearing-
The heavier the vehicle, the more pronounced wear will be on the friction cone. We recommend using the Coupler in vehicles 2600 pounds and under, or with adequate low gearing to avoid overloading the cone clutch.
Start out in low gear-
If you only use third and fourth gear and your car is heavy, accelerated wear will occur to the friction lining.
Because the direct drive connection is not synchronized, engine and input speeds must match before re-engagement.
|Chevrolet (early)||1 1/8-10||28510|
|Chevrolet (early)||1 1/8-26||28540|
|Chevrolet (late)||1 1/8-10||28590|
|Chevrolet (late)||1 1/8-26||28595|
|Chevrolet (late)||1 3/8-10||28525|
|Ford SB||1 3/8-10||28550|
|Ford SB||1 1/16-10||28545|
|Ford BB||1 3/8-10||28570|
|Ford 2000cc||1 1/16-10||28555|
|Ford 2300cc||1 1/16-10||28560|
|Chysler 6 bolt||1-23||28585|