Mini Spools and Rear Gear Swap
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Senior Member
Joined: Sep 2000
Posts: 699
Likes: 32
From: McDonough, GA
Car: 1991 Camaro RS
Engine: 305 TBI
Transmission: 700R4
Axle/Gears: 3.42
Mini Spools and Rear Gear Swap
I'm the original owner of a 1991 RS with the original TBI motor. The rear is starting with low whine so I'm considering changing the ring and pinion. It's an automatic car with the original 2.73 gear and I want to go to a 3.73 gear and install a mini spool and obviously a rebuild kit. Has anyone tried this especially in terms of the mini spool. I'm interested in the results and RPM while cruising at 65-70 mph on the highway. Thanks!
Supreme Member
Joined: Oct 2004
Posts: 4,526
Likes: 238
From: Henrietta NY
Car: 1984 Trans Am L69
Engine: Sniper EFI Powered 355
Transmission: WC T5 w/ Steel Support Plate
Axle/Gears: 3.42 10 Bolt Posi
Re: Mini Spools and Rear Gear Swap
I would never put a mini spool on a street car. If you are putting in new gears you might as well get a new POSI. A zexel from a LS1 posi rear will be a good used option. Otherwise eaton or yukon duragrip are popular. Going from 2.73 to 3.73 you are up about 500RPM at the same speed.
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