Anyone run 33s with auto 4.2l and 3.55 gears? - Page 2 - JeepForum.com
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Unread 04-11-2013, 08:06 PM   #16
kgb_m3
Registered User
1989 YJ Wrangler 
 
Join Date: Dec 2011
Location: San Diego, CA
Posts: 878
Quote:
Originally Posted by bill8bud View Post
What calc are using?
Try this one
http://www.grimmjeeper.com/gears.html
Yep, that's the one. I chose tf999, np231, 31" tires and 3.55 nothing matches up. When I chose 4.10 then everything is on point. Doing driveshaft vs. tire rotation physical test points to 3.55.

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