What gears could I have?

[Thumper]

I'm showing 3.73, or 4.27 in the 1972 book I have. I have a '72 CJ5 , AMC 258 i6 / 4.2l (AMC 258 i6 / 4.2l ), 3spd/Dana 20 , and Dana 30 /Dana 44 axles. Does anyone have a number so I can pull the diffs and see what I have, if that's what I need to do?

 

[IOPort51]

on the Dana 44 rear axle there should be a tag that is between two cover bolts. the last three numbers on the bottom line are your ratio numbers.

turn the wheel , you should be able to see if the wheel turns once for every 3 3/4 turns or 4 1/4 turns. doyou have one piece axles? or tapered two piece axlesin the Dana 44 ??

 

[mylittlecj5]

Dana 44 will not have tapered 2 piece axles...

 

[Thumper]

I'll be working on the CJ a little today so I'll look for a tag on the axle.

 

[IOPort51]

yea they will.

Jeep Axle: Dana 44 - - Jeep at Off-Road.com

CJ Dana 44

Before 1972 all CJ Dana 44s had an offset differential since the Dana 18 Transfer Case has the rear output shaft offset to the passenger side. Before mid 1970, they used a 19 spline or 27 spline, two piece axle shaft. After mid 1970, they used a superior 30 spline flanged axle shaft.

Dana 44 will not have tapered 2 piece axles...

 

[Old Dog]

If I were you I would pull the covers off and count teeth. Thats the only sure way of knowing.
The jeep will thank you for the new diff. oil.

 

[IOPort51]

It's always a good idea to look at the oil from time to time and be sure you are not making a "milkshake "in the rear axle. Of course that goes for both axles , tranny and TC too.

If I were you I would pull the covers off and count teeth. Thats the only sure way of knowing.
The jeep will thank you for the new diff. oil.

 

[CJ]

You don't really have to actually count the teeth - the ring gear will have the number of teeth stamped on it for both the ring and the pinion.

Example - 4111 = a 3.73 ratio (41 / 11 = 3.73)