LS1Goat2004

Does anyone know of a good site where I can get some 3.91's? Kinda confusing... searching for them I see them priced at anywhere from 100-150 all the way up to around 600. Doesn't make much sense. Also what brand would you suggest going with? Thanks in advance.

svede1212

iTrader: (3)

You aren't going to find any new that fits our rear end for $100. They are all around $450-600. gForce Engineering is a good place to start.

Jontall

Do not buy Motive gears from Gforce because they will make noise. Andy (A_Vas) has OE Australian gears in stock (3.91 and 3.73). Post #13 and #17 here: http://www.ls1gto.com/forums/showthread.php?t=686545
Send him a PM there or call Complete Street Performance; they are a sponsor on ls1gto.com.

svede1212

iTrader: (3)

Good point although the setup is probably the most important thing. You can also get gears from Difftechnics in Australia.

2QWK4RU 06 GOAT

iTrader: (1)

I have oem gears, and the correct bearings and seals. I build these diffs on a regular basis. Pm me if I can help.

Afaik, the vendors mentioned above don't use all the same parts that I do.

2QWK4RU 06 GOAT

iTrader: (1)

The Motive gears are fairly quiet if set up correctly, there are other install issues with them.

LS1Goat2004

Thanks for all of the responses guys. I will definitely check out some of those links/companies that make em. 3.91's for an A4 2004 isn't too much, is it?

Jontall

I didn't realize you also sold gears and parts.

2QWK4RU 06 GOAT

iTrader: (1)

I do. I also rebuild/mod trutrac and oem lsd units. I've got 3 wavetrac builds this week alone, but they are sealed at the factory and there has been no need to touch them so far.

Jontall

PM me a price on a rebuild with a Wavetrac and the turn-around time. Do I need to buy the Wavetrac from DSS? Do I need to supply a core? I have new gears sitting here.

ULTIMATEORANGESS

iTrader: (4)

its been awhile but last i checked gears were major expensive for these cars thats why i decided against it.

SIC GTO

Same here. I wouldn't mind having 3.91's or even some 3.73's but the cost and after some things I read I decided to just stay stock.

Felix C

For the gain 3.46 to 3.73 is 5% tq increase or 10% for 3.91 IIRC

george g

iTrader: (12)

Motive gears can be had for about $350 on ebay.

GotToGo

You guys know anything about this site?

http://www.nationaldrivetrain.com/start.php

2QWK4RU 06 GOAT

iTrader: (1)

Bought from them twice, would never buy from again; I know that much.

What are you after?

bohnman

iTrader: (5)

Wavetrac and 3.91's in warm Cali headed to cold Chicago right Mike

2QWK4RU 06 GOAT

iTrader: (1)

Soon... very soon.

GotToGo

Nothing. I ran across that site a while back but never used them. I always wondered if they were legit so this seemed like a good time to ask.

A_VAS

iTrader: (16)

I have Dana 3.91 and 3.73 on the shelf, FYI
they aren't cheap, but they aren't noisy either