looking for 391/410 gears

Reply Subscribe

Thread Tools

Search this Thread

Dec 8, 2005 | 09:59 PM

mcbuff47

Thread Starter

Junior Member

Joined: Dec 2005

Posts: 6

Likes: 0

From: Houma, La

Car: 88 bird

Engine: 355

Transmission: 700 R-4

looking for 391/410 gears

Anybody have some new 391 or 410 gears to replace 308 gears in a 88 Firebird posi rear?

Dec 10, 2005 | 07:11 PM

Ricktpi

Supreme Member

Joined: Mar 2002

Posts: 1,654

Likes: 2

From: Lower Salford, PA

Car: 1987 Camaro Z-28

Engine: 6.3L Victor EFI

Transmission: Tremec TKO 600

Axle/Gears: Moser 9"/4.11 Trac-Lok

9 bolt or 10 bolt? 10 bolt ratios are 2.73, 3.08, 3.23, 3.42, 3.73, 4.11. 4.56. there are less choices with a 9 bolt & they are more expensive. The only ratios I know of for 9 bolts are 2.73, 3.27, 3.45 from Randy's Ring & Pinion.

Dec 10, 2005 | 11:02 PM

Kevin91Z

Moderator

iTrader: (1)

Joined: Jul 1999

Posts: 10,950

Likes: 26

From: Orange, SoCal

Car: 1990 Pontiac Trans Am

Engine: 355 TPI siamesed runners

Transmission: Tremec T56

Axle/Gears: 12-Bolt 3.73

You can get new 3.73 and 4.10 ratio gears for 3.08 and lower rear ends from Summit and Jegs.

If you're looking for a private party sale, please post in the classifieds.