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Old 01-08-2017, 10:57 AM
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Thick gears vs. Standard

I have searched and found some info, just wanted to double check. I am getting Thick gears for my Dana 44 rear. The place I bought the axles/gears/lockers said they had the 3.73 and lower elocker in stock and would give me the thick, double drilled gears at the same price. So my question is, is there any advantage to thick vs. standard gears?

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Old 01-08-2017, 11:53 AM   #2
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Thick gears are required depending on what gear ratio originally came in the differential from the factory, not because they are stronger or not.

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Old 01-08-2017, 11:58 AM   #3
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It has to do with what is called "carrier break". Basically it's the axle manufacturers gear ratio "line in the sand" where with below a certain ration they had a different sized gear carrier than above that ratio.

In my 1987 Grand Wagoneer d44 axles, carrier break is a 3:73(iirc) so when I ordered 4:88 gears to replace my 2:32 factory ratio (eek! The 70s and 80s sucked for passenger vehicles) I needed "thick" gearset to align the ring gear properly due to carrier offset.

Corrections in vernacular welcome.


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Old 01-08-2017, 04:54 PM
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Cool. I read all about the carrier breaks, I just wanted to get a pulse on the forum. It sounds like from my research if they are stronger, it is only minimally stronger. Thanks!
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Old 01-08-2017, 06:39 PM   #5
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Quote:
Originally Posted by Linderballs View Post
Cool. I read all about the carrier breaks, I just wanted to get a pulse on the forum. It sounds like from my research if they are stronger, it is only minimally stronger. Thanks!
I know of no gear distributor that touts them as stronger. The only reason they are made is to compensate for the carrier break or to solve a carrier break problem like your seller is faced with.

The locker is on the wrong side of the carrier break for the standard thickness gears but he has thick cut gears that will work so he is selling them to solve the problem.

They are a good problem solver especially for folks like TJM who make air lockers and they only make them in one size with no regard to carrier break. Or in this case, 3.73 and numerically lower.
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Old 01-08-2017, 07:04 PM
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Thanks man! You are not just a wizard of brakes!

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