Hello everyone!
After dropping a new high HP/Torque motor in my 1970 Cougar last summer, I'm looking to have the rear end upgraded as well. Currently, the car has 28-spline axles and a 3.0 open differential. I bought a set of 3.7 gears which I've been waiting to have installed until I had the cash put aside. Also, I'd like to install some type of traction control differential. So, the questions:
1) Will the 28 spline shafts hold up to 500 HP/ft lb or do I need to upgrade to 31 spline shafts?
2) Are the gear sets the same between 28-spline axles and 31-spline axles or do the gears have to be changed as well if I upgrade to 31 spline axles? I've seen reference to "28 spline pinion gears" and don't know it that has to be changed if I go to 31 spline axles. I hope not!
2) Any suggestions for what type of differential to get? The car is street driven/cruised, I just want to be able to get power to both wheels when I mash the gas rather than a one tire fire for those burnout contests and traffic light theatrics.
Thanks!
After dropping a new high HP/Torque motor in my 1970 Cougar last summer, I'm looking to have the rear end upgraded as well. Currently, the car has 28-spline axles and a 3.0 open differential. I bought a set of 3.7 gears which I've been waiting to have installed until I had the cash put aside. Also, I'd like to install some type of traction control differential. So, the questions:
1) Will the 28 spline shafts hold up to 500 HP/ft lb or do I need to upgrade to 31 spline shafts?
2) Are the gear sets the same between 28-spline axles and 31-spline axles or do the gears have to be changed as well if I upgrade to 31 spline axles? I've seen reference to "28 spline pinion gears" and don't know it that has to be changed if I go to 31 spline axles. I hope not!
2) Any suggestions for what type of differential to get? The car is street driven/cruised, I just want to be able to get power to both wheels when I mash the gas rather than a one tire fire for those burnout contests and traffic light theatrics.
Thanks!