duckvader

iTrader: (1)

will my 10 bolt last longer if i just leave 3.23 gears in vs 3.73 gear. so are the higher gear ratios stronger because larger teeth on gears. i have a 3600 vig stall. i will not go to track alot. installing new panhard,lca,torque arm,lca relocation brackets, ce shocks. this should stop all wheel hop. also car is lt1 383, le2 setup.

FirstYrLS1Z

iTrader: (4)

OEM 3.23s' (7.625") are stronger than aftermarket 3.73s' (7.5"),but since your automatic,it probably doesn't matter.

reference for difference in pinion size

duckvader

iTrader: (1)

so the gm 3.23 gears i have now should be alot better in my setup as far as strenght in my stock 10 bolt is concern . i was thinking that a change to 3.73 would not be worth it , as far as performance vs reliablity. what about girdle.

FirstYrLS1Z

iTrader: (4)

wheel hop destroys rearends,get rid of wheel hop and rearend will last longer.
a 'girdle',nothings ever been proven that it helps,in theory it does,it's a good insurance piece.

krissoto

iTrader: (3)

please correct me if I am wrong, but the 3.23 gear also has a thicker ring gear as well. More teeth, thinner the ring gear, as they have to cut more teeth into it. That's what I have been advised.

chaman

iTrader: (5)

Cool! Mine came with factory 3.23 gears.

Oldsmobility85

iTrader: (1)

Not only does the shear size of the ring gear make it stronger but with a lower ratio you have more teath meshing together which lowers the stress on each tooth.

redbird555

iTrader: (14)

Yes that is true but your missing the fact that cutting more teeth drastically reduces the strength of each one because the teeth have to be cut thinner to fit more on the same size ring. 3.23'S to 3.73's wouldnt be a huge difference in strength especially for an auto. The m6 cars tend to be harder on the rears which is why some people shy away fro 4.10s the teeth are much smaller and they break easier but in an auto i dont see it being too much of an issue.

Oldsmobility85

iTrader: (1)

I was just kinda adding to what had already been said. I run a 600hp 406SBC in my 4th gen and it held up with 4.10s on the motor going 6.90s but spraying it out of the hole trashed the rear. Not even sure as to what broke. Still haven't pulled the cover to look. LOL.

garygnu

good suspension parts and proper set up will lessen will hop.a taller slick will lessen the toque shock also.

duckvader

iTrader: (1)

so until i can save for new rear end, my best bet is to leave stock gm 3.23 in. also you are saying that slicks will absorb more shock than drag radials, and put less strain on 10 bolt at launch.

spy2520

iTrader: (3)

If i remember correctly, there isnt a huge difference in tooth count from 3.23 to 3.73. Something like 1 or 2 teeth difference. Something like 42/13 versus 41/11. I could be wrong but its close.

Oldsmobility85

iTrader: (1)

Also a numericaly higher ratio such as a 4.10 aplies a lot more axle torque which puts a lot more stress on the carrier, axles, lug studs and so on.

01ssreda4

iTrader: (96)

The gears arent what usually breaks, its the posi.

gregrob

iTrader: (8)

Guess that's why mine broke 4 sets of gears and the posi is still fine.

01ssreda4

iTrader: (96)

I cant help it something ELSE was wrong with your rear end

Oldsmobility85

iTrader: (1)

Youd think after 4 sets of gears that it was time to upgrade. Every car is different. I think by the way my car acts that the posi broke rather than the gear.

gregrob

iTrader: (8)

**** no. 10 bolt ftmfw

jim ravencraft

Hi,
i see many varied opinions on this issue. Failure results from fatigue/stress.
Torque/horsepower/traction can cause sudden failure. Having the gears properly set up will eliminate issues but will not prevent them. Hard launches generates alot of wear and tear. It really hurts to play$$$$$$$$$$$$.
23 to 73 equals .2-.3 in the 1/4 mile
give or take a little bit! Enjoy your ride and have a blessed day......
Captain jim 9.56/155.12