4.10 vs 4.3 in 20B N/A FC

Christopher W. · 06-12-2008, 05:08 AM

I got a 90" model TII rear end to go in my GTUs. Didn't bother with the S4 because I am thinking about a Guru diff. I want a Torsen not interested in Kaaz or the like. I want quiet and smooth operation. Depending on how it acts with the stock TII rear I might even stay with stock TII viscous lsd. Looking to make in the 350-380hp. Well, I was going to try to stay with the n/a for weight saving by cryoing the stub axle. I think there is a lot of debate how much the n/a can handle.

I decided to go ahead and get a TII rear and not risk trashing a perfectly good low mile GTUs rear.

I was always excited about the 4.33 gearing with the n/a rear. As best I can tell this rear has a 4.10 gear. This car is for all real purposes a street car. I don't see speeds over 150mph being that important.

My question is how much of a real difference is there, real and perceived?

Does anyone think you really get through the gears that much quicker?

What would some of you guys do?

I am leaning toward putting in the 4.3...

06-12-2008, 05:08 AM	#1
Christopher W. Rotary Fan in Training Join Date: Mar 2008 Posts: 98 Rep Power: 18	4.10 vs 4.3 in 20B N/A FC I got a 90" model TII rear end to go in my GTUs. Didn't bother with the S4 because I am thinking about a Guru diff. I want a Torsen not interested in Kaaz or the like. I want quiet and smooth operation. Depending on how it acts with the stock TII rear I might even stay with stock TII viscous lsd. Looking to make in the 350-380hp. Well, I was going to try to stay with the n/a for weight saving by cryoing the stub axle. I think there is a lot of debate how much the n/a can handle. I decided to go ahead and get a TII rear and not risk trashing a perfectly good low mile GTUs rear. I was always excited about the 4.33 gearing with the n/a rear. As best I can tell this rear has a 4.10 gear. This car is for all real purposes a street car. I don't see speeds over 150mph being that important. My question is how much of a real difference is there, real and perceived? Does anyone think you really get through the gears that much quicker? What would some of you guys do? I am leaning toward putting in the 4.3... Last edited by Christopher W.; 06-12-2008 at 10:06 AM.