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post #1 of Old 11-08-2011, 05:30 PM Thread Starter
musclenut
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1982 CJ7 
 
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What parts are needed for a regear?

What is the parts list required for regearing a Dana 30 front and a AMC20. So far I have:
Ring and pinion front and rear 4:10
master instalation kit front and rear

I'm going to go on ahead and replace the hub seals and bearings while I'm into it. When I look up parts I keep seeing references to carrier and splines. What is the number of splines for a stock cj7 1982 with 20 and 30 axles? What does the carrier refer to? Thanks!

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post #2 of Old 11-08-2011, 08:39 PM
kickingprop
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What are your current gears? You will probably need at least a new carrier for the Dana 30. If you had 2.73 then you will also need a new carrier for the AMC20 as well.

The Dana 30 is 27 spline stock in stock form and the AMC20 is 29 spline. I believe the dana30 can be upgraded to 30 spline...

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Phase Three: Waggy 44 front, Scout D44 Rear, 4.56's, ARB's (F/R) SOA with YJ Springs, 35x12.50x15 BFG MT - Not Even Close to beginning

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post #3 of Old 11-09-2011, 07:01 AM Thread Starter
musclenut
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I'm running 2.73 with 35"
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post #4 of Old 11-09-2011, 07:10 AM
CSP
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You'll need new carriers, front and rear. This is the part that the ring gear bolts to. Lower gearsets (higher numerically) have smaller pinions and the ring gear needs to be placed closer to the centerline of the pinion and that's why you'll need different carriers.
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post #5 of Old 11-09-2011, 07:23 AM
Renegade82
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Ditto that. I was in the same boat 13 years ago and I went to 3.73's so I had to replace both. If your contemplating a locker of some type (except for the lunchbox type), now would be the time to do it and save yourself buying a carrier and putting that money towards the locker. A locker would be the carrier plus the guts and come as one.

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post #6 of Old 11-09-2011, 09:34 AM
benullman
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also remember, you can order 'thick' cut gears. I ordered a USA Standard 4.20 thick gearset for my Scout Dana 44s for $140 each.

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post #7 of Old 11-09-2011, 09:42 AM
Frenimy
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Is that true for the AMC 20 and the Dana 30? I have not seen thick cut gears or heard people talk about them but if that is the case I might look into that route as well I am trying to find a carrier for an AMC 20 right now.

1981 CJ7 I6 258, NP435, Dana 300 Twin Sticks, AMC 20 & Dana 30 with Lockers, On board air, 33" X 12.50" tires
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post #8 of Old 11-09-2011, 10:15 AM
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Quote:
Originally Posted by Frenimy View Post
Is that true for the AMC 20 and the Dana 30? I have not seen thick cut gears or heard people talk about them but if that is the case I might look into that route as well I am trying to find a carrier for an AMC 20 right now.
No, they do make thick gears for those axles.

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post #9 of Old 11-09-2011, 10:24 AM
Renegade82
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Your right, the carriers aren't easy to find anymore. Try these guys:
http://www.drivetrain.com/parts_cata...d_pinions.html

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post #10 of Old 11-09-2011, 03:37 PM
kcarlsonjeep
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The carrier split for both the amc 20 and the dana 30 at 3.73. So at 3.73 and numerically higher will need a different carrier from what you currently have with 2.73. Randy's Ring and Pinion has good information on carrier splits.
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post #11 of Old 11-09-2011, 03:40 PM
kcarlsonjeep
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Sorry different for amc 20. It has been a while since my Jeep has had that axle. The split is between 2.73 and 3.08.
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post #12 of Old 11-09-2011, 03:59 PM
78treehugger
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An option for your Moel 20 is to either find an axle or carrier from a late 70's era CJ. They will more than likely have 3.54 gears. That carrier will work for your 4.10 gears. Whole model 20 axles are pretty cheap to find and sometimes free. Or the better option is to go with a full locker as suggest above, if feesable.

1980 CJ 7--3" Black Diamond, 1" body, locked both ends, 4.56, 35x12.50x15 SS LTB, "family" cage

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post #13 of Old 11-09-2011, 05:57 PM Thread Starter
musclenut
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I found the carriers on 4wd web site. The price for the two will be $360 I'll keep my eyes open for on old late 70s model.
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post #14 of Old 11-09-2011, 06:08 PM Thread Starter
musclenut
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E-bay has several dana 30 carriers for alot cheeper than a new one. They're no amc 20 carriers listed though. Are all Dana 30 and AMC 20 carriers the same? Do they wear out? Any reason why a used would be bad?
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post #15 of Old 11-09-2011, 09:33 PM
addicted2dunes
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Quote:
Originally Posted by musclenut View Post
E-bay has several dana 30 carriers for alot cheeper than a new one. They're no amc 20 carriers listed though. Are all Dana 30 and AMC 20 carriers the same? Do they wear out? Any reason why a used would be bad?
No, usually they are rebuildable. New bearings, etc. The only time they really go bad is if you loose a shim behind one of the spiders and it scars the carrier casing. Also, a carrier can go bad if a tooth from any gear, or bearing parts are ran in the differential, metal flaking can scar a lot of surfaces.

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