CJ7 gearing - JeepForum.com

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post #1 of 19 Old 05-24-2013, 12:25 PM Thread Starter
justinwatts8282
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CJ7 gearing

im trying to purchase an 83 cj7 and im trying to figure out what rear end gear came in it stock the jeep is an inline 6 with a 5 speed manual transmission with 32x10.50x15 tires also what style of transfer case came in that model i think its a dana 300 single stick but not sure can you help me out please.

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post #2 of 19 Old 05-24-2013, 01:22 PM
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It is hard to say what the stock axle gear ratio was. Mine was 3.31, but they weren't all geared the same. You can check the ID tag on the axle if it is still there, mine was gone.

Either way, jacking it up and spinning the tire is the only way to be sure what is actually in there (other than opening it up and counting the teeth).

Also, you are correct. The transfer case would be a Dana 300.

I hope that helps.
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post #3 of 19 Old 05-24-2013, 01:26 PM
ferday
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the rear AMC 20 (assuming you have one and not a 44) has a stamp on the housing, right where it joins to the axle tube. it is a stamp so it should still be there, may have to clean it up to find it

then go to this page and read the code to find your gearing...this is all assuming that the axles are stock!

otherwise, jack the tires up and count driveshaft revolutions vs. tire revolutions, it'll get you close
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post #4 of 19 Old 05-24-2013, 06:16 PM
82JeepCJ7
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I'd bet someone else's paycheck that it has 3.31 gears in it. After '80 all CJ's had the Dana 300 T-case.

Beat it to fit, paint it to match!

Wheel, Wrench, Repeat.
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post #5 of 19 Old 05-24-2013, 06:30 PM
fourbtgait
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My 83, 5 sd has 3.54. As they say, read the rear code. My front still had the metal tag also.
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post #6 of 19 Old 05-24-2013, 08:31 PM
capt205
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My 83 had the 3.31's, T5, a D300, a D30 front, and a D20 rear

Code was stamped on the tube as mentioned, gears had not been changed
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post #7 of 19 Old 05-25-2013, 06:34 AM
keith460
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Factory ratio for 6 cylinder equipped CJ's in 1983 would be 2.73 standard and 3.31 optional.

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post #8 of 19 Old 05-25-2013, 06:54 AM
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Quote:
Originally Posted by keith460 View Post
Factory ratio for 6 cylinder equipped CJ's in 1983 would be 2.73 standard and 3.31 optional.
Larado's had 4.10's as an option.
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post #9 of 19 Old 05-25-2013, 08:14 AM
keith460
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Quote:
Originally Posted by VooDoo2 View Post
Larado's had 4.10's as an option.
Only if it had a 4 cylinder. My wife's 84 had the 4 cylinder and we ordered it with the optional 4.09 gearing. Standard for CJ's equipped with that engine got 3.54's.

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post #10 of 19 Old 05-25-2013, 10:01 AM Thread Starter
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awesome thank you guys for all the imformation huge help
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post #11 of 19 Old 05-25-2013, 11:51 AM
fourbtgait
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Quote:
Originally Posted by keith460

Only if it had a 4 cylinder. My wife's 84 had the 4 cylinder and we ordered it with the optional 4.09 gearing. Standard for CJ's equipped with that engine got 3.54's.
I never gave this any thought till you wrote it Keith.
Now I understand why, even though my 4.2 engine code on the block is for an '83, certain aspects did not seem right.
When researching just now the standard vs. optional axle ratios of the 4.2/2.5, the material I found shows that for the T5 transmission, first 4 gears are all the same, but 5th is different, .76/.86.
At least the engine swap the PO did was fairly clean.

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post #12 of 19 Old 05-25-2013, 05:24 PM
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Quote:
Originally Posted by keith460 View Post
Only if it had a 4 cylinder. My wife's 84 had the 4 cylinder and we ordered it with the optional 4.09 gearing. Standard for CJ's equipped with that engine got 3.54's.
I have a 83 Larado with factory 4.10 gearing and a factory 258/TF999/D300 driveline. Diff's havent been apart, code stamped into the case is CC. (wide track diff of course)
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post #13 of 19 Old 05-26-2013, 04:44 AM
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Quote:
Originally Posted by VooDoo2 View Post
I have a 83 Larado with factory 4.10 gearing and a factory 258/TF999/D300 driveline. Diff's havent been apart, code stamped into the case is CC. (wide track diff of course)
Maybe in Australia, even though I never heard of that, but not in the United States. Gas crunch years saw poor gearing for the factory equipped I6 engines back in the day. I briefly owned a 79 Toyota 4x4 pickup with a 4 cylinder and factory 4.37 gears. It still was a turd getting up to speed.

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post #14 of 19 Old 05-26-2013, 05:09 PM
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This CJ was built in Toledo and shipped here. We didnt build any CJ7's here so its still a USA manufactured car. Definately CC Widetrack 4.10 Diff's
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post #15 of 19 Old 05-26-2013, 11:04 PM
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Quote:
Originally Posted by VooDoo2
This CJ was built in Toledo and shipped here. We didnt build any CJ7's here so its still a USA manufactured car. Definately CC Widetrack 4.10 Diff's
Ok, that's enough, this is a car.

image-426729532.jpg

This is a Jeep, you guys seem to get confused down under.



image-1555805582.jpg

Bill

1957 WILLYS pickup,
1973 J 4000,
1978 CJ7 DD.
1979 CJ7 360, TH400/Quadratrac.
1979 J20
1980 CJ5 trail Jeep.
1983 CJ7
1989 YJ the CJ to YJ.
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