locker, gears and confusion...

monkyfart13 · **Posted:** Thu Jan 28, 2010 9:36 pm

So i did my taxes a couple nights ago and it looks like this is gonna be a great year for my jeep. Im definitly set on getting a Detroit Locker for my rear axle, the confusion comes with swapping the gears.. First of all it took me forever to understand why my 3:73 was considered a higher gear ratio than the 4:10, i didnt get why the big number was a small gear and the small number was the big gear.. but whatever... Iv been running my 265/75's with my stock gear ratio of 3:73 and iv read plenty of post that say it is highly recommened to swap for the 4:10.... Rustys offroad offers a gear combo that swaps the dana 30 and the chrysler 8.25 with new ring and pinions and includes overhaul kits. They offer this in the 4:10 and the 4:56 gear ratio. If a hgher gear is recommended, then why doesnt anyone go to the 4:56??? I dont know nearly enough about this so any advice is appreciated.. again.. im definitly Locking the rear with Detroit and while im at it I wanna swap for new gears but dont know what I need.

ATXKJ · **Posted:** Thu Jan 28, 2010 9:43 pm

No one makes a 4.56 for the D30A - the pinion shaft is longer than a D30
available gearsets are 3.55, 3.73. 4.10

monkyfart13 · **Posted:** Thu Jan 28, 2010 11:32 pm

ahhhhhhh... that explains alot

daspes · **Posted:** Fri Jan 29, 2010 10:03 am

Yes make sure that when you order your gearsets its for a D30A not a D30.

tjkj2002 · **Posted:** Fri Jan 29, 2010 9:17 pm

Dana/Spicer is the only company that makes the gears for the KJ's D30A.

locker, gears and confusion...

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