Recommendations

[SupermanX24]

Ok, so my ring and pinion gears are slightly sheered, and my posi unit is ready to take a dump. Anyone recommend a certain company? I was thinking SLP ring and pinion, and getting the posi unit from richmond.

[Fast92RS]

Is a 12 bolt in your budget, cause thats what I would do..

[SupermanX24]

i'm on a $1,000 budget. I wanted a 12 bolt (whole rear end) pretty bad, but I don't have THAT much.

Ring and Pinion: 250
Install Kit: 150
Posi Unit: 500

and I have an instructor in school that said he'd do it for me, and have it all done in one day. of course with a fee. So, i'm looking around 1200. lol

[WildBillyT]

Motive ring and pinion, Zexel-Torsen diff.

[Tru2Chevy]

I would do motive gears, and either a zexel-torsen or an auburn pro diff.

- Justin

[Savage_Messiah]

eaton

[SupermanX24]

Damn, so much to choose from. lol

[Mike]

get a ta or other brand aluminum diff cover while you have it apart

[Savage_Messiah]

:stupid:.... forgot about that

[bad64chevelle]

When did mine in, I did an Eaton Posi, Motive Gears, and a TA Girdle, among a few other things. Works great, and It only whines at a little bit of a higher MPH and its BARELY noticable.

[SupermanX24]

When did mine in, I did an Eaton Posi, Motive Gears, and a TA Girdle, among a few other things. Works great, and It only whines at a little bit of a higher MPH and its BARELY noticable.

How much did you wind up spending?

[qwikz28]

he installed it all himself and bought the diff on sale

[bad64chevelle]

How much did you wind up spending?

I spent about $800 total, and they threw in a set of SFCs for half price for me. But that was New Eaton Posi, Motive Gears, TA Girdle, Install kit with a solid spacer, all the fluid I needed, the SFCs, and a few other odds and ends.

**Edit** But like Jake said, the car never left my garage and had a few buddies help me out. I would of spent alot more had I sent the car to someone else.

[alexm]

i have to buy lsd for the car soon its driving me mad all this one wheel spinning. What sort of price is it to get one fitted? not used to paying for things to be fitted but i havent got the tools or the location anymore to complete this task.

[SupermanX24]

i have to buy lsd for the car soon its driving me mad all this one wheel spinning. What sort of price is it to get one fitted? not used to paying for things to be fitted but i havent got the tools or the location anymore to complete this task.

ah yes, I remember my days of the one tire burnout. lol

[alexm]

it is annoying me so bad, the car stays to straight in the wet i miss the lsd fun

[Savage_Messiah]

btw..... go 4.10s

[SupermanX24]

I kinda wanna keep my fuel mileage? Or is it not much difference?

[Bandit]

SLP gears are GM gears, My Motive gears had a bent pinon when it blew, I replaced them with SLP gears and I had a spare new torsen in the garage.

If you drag race go for the Auburn Posi, you can get them on ebay from Horsepower1 for under 300.

Put on a girdle too

[qwikz28]

I kinda wanna keep my fuel mileage? Or is it not much difference?

gears dont effect mileage. driving style does, but its hard to not change your driving style with gears.

[WildBillyT]

gears dont effect mileage. driving style does, but its hard to not change your driving style with gears.

Eh? Care to elaborate?

If you spin 2,000 doing 65 on the highway and you now spin 2,400 at the same speed your milage will be worse...

[Bandit]

Eh? Care to elaborate?

If you spin 2,000 doing 65 on the highway and you now spin 2,400 at the same speed your milage will be worse...

gears do impact mpg, 3.23 to 3.73 my gas mileage dropped about 4mpg.

[WildBillyT]

gears do impact mpg, 3.23 to 3.73 my gas mileage dropped about 4mpg.

Yeah, I know... I'm just wondering why qwik said that... Unless he means around town where you may spend more time in OD then you did before.

[bad64chevelle]

Mine lost a little bit (from 3.23s to 3.73s) but not too much of a loss. What I think Jake (QwikZ) means is that the loss is not that bad, however with the gears sometimes there is more tendency to stab the throttle :-)

[Savage_Messiah]

when i went from 3.42 to 4.10 i noticed maybe a couple MPG change. Nothing that concerned me personally. A lot of people see better around town milage with (numerically) higher gears since the engine doesn't have to work as hard to get the car moving

[Tru2Chevy]

when i went from 3.42 to 4.10 i noticed maybe a couple MPG change. Nothing that concerned me personally. A lot of people see better around town milage with (numerically) higher gears since the engine doesn't have to work as hard to get the car moving

Yes, when Little G went from 3.23s to 4.10s in his '02 V6/M5 he lost a few MPG on the highway, but picked up a few around town.

- Justin

[SupermanX24]

Ok, so I finally found an Eaton Posi, now I'm looking for the gears. What's the difference between thick and thin, and which do you recommend.

[WildBillyT]

Ok, so I finally found an Eaton Posi, now I'm looking for the gears. What's the difference between thick and thin, and which do you recommend.

Thick is for a 2 series carrier, thin is for a 3 series.

[Blacdout96]

Yeah youll go with the thins if your using 3.23 or numerically higher gears. I, tho havent gotten them yet, I would go with 3.42. If your drag racing go 3.73 or 4.10, but if your autocrossing, or just looking for a better takeoff, but nothing insane, go with 3.42.

[Savage_Messiah]

I can't see how 4.10s WOULDN'T help autocross.

[Tru2Chevy]

I can't see how 4.10s WOULDN'T help autocross.

:stupid:

Nothing like quicker acceleration out of a corner.....

- Justin

[Blacdout96]

well like for someone like me, driving all the way up to N. Jersey would kill gas, and yeah itd be nice for autocross, but idk about a daily driver ratio, adn dont 4.10's whine a little?

[WildBillyT]

well like for someone like me, driving all the way up to N. Jersey would kill gas, and yeah itd be nice for autocross, but idk about a daily driver ratio, adn dont 4.10's whine a little?

Whining is not associated with a particular ratio. It has to do with how well the gears are set up, and what the tooth angle is. Some gear installers just put everything in and that's that- regardless of how things like pinion depth and backlash get set. They half ass it and you get noisy gears. They will also make up ******** dismissive excuses if you press them about the noise. Good gear installers will install and tear down as many times as it takes until the measurements fall within the proper range.

[SupermanX24]

How do you measure for backlash?

[Blacdout96]

Whining is not associated with a particular ratio. It has to do with how well the gears are set up, and what the tooth angle is. Some gear installers just put everything in and that's that- regardless of how things like pinion depth and backlash get set. They half ass it and you get noisy gears. They will also make up ******** dismissive excuses if you press them about the noise. Good gear installers will install and tear down as many times as it takes until the measurements fall within the proper range.

Ah, ok, thats why i never put 3.42's or 3.73's ( at first I wanted 3.73's, then decided 3.42 would be more within my range) cause I thought after a certain ratio they would whine, good info, ill keep that in mind.

[WildBillyT]

How do you measure for backlash?

Rather than type it, here is a good explanation:

http://www.rps4wd.com/tech/RandP/backlash.htm

[1QWIKBIRD]

I can't see how 4.10s WOULDN'T help autocross.

One way a set of 4.10's might become a factor is if you run out of rpm which could require a gear change to third gear. The gear change if it occurs at a bad point on the track could unsettle the car, maybe....Or by not shifting you would be on the limiter which is holding you back and potentially putting the valvetrain under undue stress.

Generally, no the 4.10's wouldn't hurt, but every course is different and there could arise a situation where the additional gear could cause a problem on a long blast if you don't have additional rpm range to go with it....

Chris