On AmericanMuscle website i noticed they are selling two different type of Gears.. from FRPP and Motive Performance. The last one works good? i want a set of 3.73

 

FRPP

 

IMO, its not the brand as much as the install. Most prefer FRPP though. I think the Motives with work fine if you have an experienced person install 'em.

 

Install is the most important part...if done wrong, bad news for your rear end.Make sure you TRUST the person who's installing it.However, I'd go with the FRPP just because they are probably the best you can go with.

 

You will have very little potential of problems if you stick with the FRPP gears. Typically you do not even have re-shim atall to achieve proper gear mesh. Good Luck!

 

I went with Motive....FRPP didn't have 3.90's and that's what I wanted....But the install was fine and no matter what setup you choose you still have to calc shim thickness using MHD (don't worry about that unless you plan on doing it yourself). I'll be posting when I get some more miles on the Motives

 

Ask your installer. If he prefers one over the other, get it. If he doesn't have a preference, get Motives, they will do fine.

 

Trust has little to do with it. Its about their skill level. Even if you trust the guy, if he doesnt have the skills or experience, unless he gets extremely lucky, the gears will whine.
Take it to an EXPERIENCED shop that deals with nothing BUT rear axles. If you dont have one of those, a highly recommended trans shop.
-P.

 

Isnt FRPP = Motive or vice versa?? who cares, as long as its qualityparts and installed corretly. And 3.90's are a waste of money.. might as well go 4.10's the difference between 3.73 and 3.90 is <200rpms at any given point.

 

It's a good thing you didn't pay for it then!