373 vs 410

[Virtue]

ok then with a 3200 stall with an a4 for daily driving an occassional track days, 4.11s or 3.73s. does my car take 4.10s or 4.11s. i actually like the idea of the 3.90s

3.90's wouldnt be bad

i have a 3.90
in my rear and i really like it

u gotta think tho with a car your throwing gears in too steep of a gear u can end up shifting in to overdrive (5th)

but.....theres more to it

[JoeliusZ28]

3.90 is weaker than a 4.11 or 3.73, food for thought

39 / 10

[LS1Formulation]

3.90s are NOT weaker than a 4.10 gear in a 7.5" ten bolt. The pinion is larger in diameter and it puts less stress on the teeth. Want to know how I know? 3 sets of 4.10 gears destroyed in my car from racing, so I installed Motive 3.90s. Haven't had a problem since. 3.90s are 43/11, 4.10s are 41/10

[Formula Z]

alright i think im doing Eaton 3.73s since i can get them at cost from work. anyone heard anything about eaton gears?

[my95z28]

do they make 3.90s? or 4.11? I would go with one of those two since they are stronger

[ITSSLOW]

Motive 3.90s FTW! I know a few people with them putting down 400+ RWHP with no problems.

[JoeliusZ28]

3.90s are NOT weaker than a 4.10 gear in a 7.5" ten bolt. The pinion is larger in diameter and it puts less stress on the teeth. Want to know how I know? 3 sets of 4.10 gears destroyed in my car from racing, so I installed Motive 3.90s. Haven't had a problem since. 3.90s are 43/11, 4.10s are 41/10

I said they were weaker than 4.11s not 4.10s.

[LS1Formulation]

Well, both...3.90's are stronger than 4.11's or 4.10's

[JoeliusZ28]

nope:

4.11 = 37 ring gear teeth / 9 pinion gear teeth
3.90 = 39 ring gear teeth / 10 pinion

[Virtue]

well we are talking about a 10 bolt so i cant comment much cause i got a 9incher back therr

[JoeliusZ28]

the tooth counts would be the same but it doesnt really make a difference when they are impossible to break anyway lol