R&P gear replacement - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 09-19-2001, 10:30 AM
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R&P gear replacement

ok folks
someone point me in the right direction to get the best gears at the cheapest price
i think i decided on 3.73s for my 83 CJ with current 2.73s
i'm running 33s and will go to 35s w/258 and auto xmsn.
still welcoming opinions on the gear size and definitely need to know where to shop
thanks
bob

[img]/wwwthreads_images/icons/cool.gif[/img] 83 CJ-7 [img]/wwwthreads_images/icons/cool.gif[/img] <font color=red> IF YOU AREN'T LIVIN' ON THE EDGE YOU'RE TAKING UP TOO MUCH ROOM! </font color=red>

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post #2 of (permalink) Old 09-19-2001, 10:47 AM
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Re: R&P gear replacement

Drivetrain direct has "package" deals for about $410 incl. Front & Rear R&P & install kits. You will also need a new carrier for the rear (I assume AMC20), and if you go numerically higher than 3.73, I believe you will need a new carrier for the front (D30). They had quoted me $50 for the carrier for the rear one time.

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post #3 of (permalink) Old 09-19-2001, 11:28 AM
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Re: R&P gear replacement

Actually he'll need a new front carrier as well, the break on the D30 is 2.73 to 3.54 and 3.73 to 5.38. You may be thinking of the D44 break, which is 2.73 to 3.73 and 3.92 to 5.88.

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post #4 of (permalink) Old 09-19-2001, 11:52 AM
 
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Re: R&P gear replacement

With a 6-cyl and automatic I'd be wanted 4.10 gears at least to run 33s. I'm going to be running 31s with a 258/TF-727 and 4.10 gears soon.

Make it up as you go.
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post #5 of (permalink) Old 09-19-2001, 01:27 PM
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Re: R&P gear replacement

wow thanks all, especially for the link mel
hey sycho what advantage will 4.10s give me over 3.73s?
will it still allow me to travel at interstate speed?
thanx
bob

[img]/wwwthreads_images/icons/cool.gif[/img] 83 CJ-7 [img]/wwwthreads_images/icons/cool.gif[/img] <font color=red> IF YOU AREN'T LIVIN' ON THE EDGE YOU'RE TAKING UP TOO MUCH ROOM! </font color=red>

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post #6 of (permalink) Old 09-19-2001, 01:40 PM
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Re: R&P gear replacement

Bob, it depends on the tranny you're running. The thoughts of lower gearing with an automatic is b/c it has a torque converter. With a 3-speed auto, 4.10s would be the highest I'd go with 33s. With a 4-speed, you've got more options.

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post #7 of (permalink) Old 09-19-2001, 05:58 PM
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Re: R&P gear replacement

hey i learned a little more on gearing today. with the 3 speed auto and no overdrive the 3.73 option looks best to keep the hiway RPM under control
if i had an overdrive i would step up to 4.10s
as is i need new cases in the front and rear so around $800 total
which begs the question....gears first then winch?? naw better use the common sense!
thanks everyone
bob
oh canis LFT is fine but a little soggy and the WX man promised a cool front (RIGHT)

[img]/wwwthreads_images/icons/cool.gif[/img] 83 CJ-7 [img]/wwwthreads_images/icons/cool.gif[/img] <font color=red> IF YOU AREN'T LIVIN' ON THE EDGE YOU'RE TAKING UP TOO MUCH ROOM! </font color=red>

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post #8 of (permalink) Old 09-19-2001, 09:15 PM
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Re: R&P gear replacement

Excuse me(hand in air). Unless I miss my guess the only carrier he is going to need is for the front. The factory carrier in the model 20 is good for all available gear ratios.

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post #9 of (permalink) Old 09-19-2001, 10:34 PM
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Re: R&P gear replacement

spook2,
Nope, from what I have learned the 2.73 AMC20 carrier is only good with that ratio. 3.08 through 4.56 use the same carrier. Kind of sucks 'cause I got 2.73s too.

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post #10 of (permalink) Old 09-19-2001, 11:07 PM
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Re: R&P gear replacement

OK guys, let me throw in my 2 cents.
I just had my 2.73's swapped for 4.10's. I have an 83 CJ7 with the 258 and 4 speed tranny and 33" BFG MTs.
Yes, you will need a new carrier for the front and rear. But check this out, no one has the factory open carrier for the AMC 20. The only carriers available are the Auburn L/S and Detroit Locker. That's it! Unless of course you know where to get a used one. I got the Auburn as it is more streetable and cheaper then the Detroit unit.
Power is great now with the 4.10's but the rpms climb way fast.
A local shop did mine. The total bill was about $1500 including tax. The Auburn alone was $350. Labor was $500. The rest was parts.

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