Which is the 3.73 that fits my diff??? Which one should I buy? Where to buy???
opinions on quality???

Thanks

 

I was told, that for quiteness, the motive were the best way to go. And that they were a pretty solid gear. You can get a "harder" gear that whines a little more...richmond(was steered away from these because of noise), strange, and moser to name a few. I am going to go with the motives just because of their reputation for being quite.

 

Of course you can always go with a Richmond. The name has been around for a long time. I had 4.10s in my car a while back and it whined a little. Now I have 3.73's and there is no noise at all. I think it was how it was installed that made the noise.

 

I have the GM 3.73's

 

Part number for the GM?