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Unread 01-25-2013, 12:14 PM   #1
NExOBLIVISCARIS
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Axle spline count?

how do i know which spline count my axle has? (inb4 count them) i need to order a new differential and I remember something about the 1970 has a normal axle and a flanged axle

i have a 1970 cj-5 with the offset dana 44...and it says it was built in april (it says they switched halfway through the year for the axles)

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Unread 01-25-2013, 12:39 PM   #2
CSP
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If nothing sticks out beyond the center of the wheel you have a flanged axle, which will be 30 spline.
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Unread 01-25-2013, 12:48 PM   #3
NExOBLIVISCARIS
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Like this?
20130125_114417.jpg  
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Unread 01-25-2013, 01:10 PM   #4
CSP
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You'll have to take that center cap off of the wheel to see if the mounting face for the wheel is flat or it if has a nut on the end.

This is the non-flanged axle (10 spline or 19 spline)


The flanged version (30 spline)
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Unread 01-25-2013, 05:00 PM   #5
NExOBLIVISCARIS
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Looks like I got the flanged version, what does this mean besides I have only got 30 splines?
20130125_155104.jpg   20130125_155147.jpg  
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Unread 01-25-2013, 06:39 PM   #6
CSP
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The flanged axles are stronger than the two-piece, tapered version. The tapered D44 axles aren't nearly as bad as the AMC 20 tapereds though, as far as breakage goes.
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Unread 01-25-2013, 07:18 PM   #7
NExOBLIVISCARIS
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Quote:
Originally Posted by CSP View Post
The flanged axles are stronger than the two-piece, tapered version. The tapered D44 axles aren't nearly as bad as the AMC 20 tapereds though, as far as breakage goes.
Thats what I like to hear, so far what I have for the rebuild kit is
http://www.amazon.com/gp/aw/d/B009X1...omotive&sr=1-1

And

m.summitracing.com/parts/sag-d44489

Will these parts work cause I don't know what the spline count is for the pinion gear
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Unread 01-25-2013, 07:27 PM   #8
CSP
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Your summit link doesn't work. You probably need to post a link from their regular website, not the one that's an app for your phone.
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Unread 01-25-2013, 08:05 PM   #9
NExOBLIVISCARIS
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sorry, I didn't realize that it put a mobile link instead of a normal one
http://www.summitracing.com/parts/sag-d44489

also dont i need some sort of rebuild and shim kit for when it all goes back together?
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Unread 01-26-2013, 08:45 AM   #10
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Why do you want to replace the ring and pinion? Are you just trying to rebuild it or are you wanting to change the gear ratio? Unless you're looking for a gear ratio change, or you have noisy pinion bearings, leave the internal alone. There's really no need to touch anything on the rear axle unless you have leaky seals, bad bearings, etc. Pop the cover off, drain the old gear oil out and clean up the inside a bit and call it good work 99% of the time.
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Unread 01-26-2013, 11:14 AM   #11
NExOBLIVISCARIS
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Quote:
Originally Posted by CSP View Post
Why do you want to replace the ring and pinion? Are you just trying to rebuild it or are you wanting to change the gear ratio? Unless you're looking for a gear ratio change, or you have noisy pinion bearings, leave the internal alone. There's really no need to touch anything on the rear axle unless you have leaky seals, bad bearings, etc. Pop the cover off, drain the old gear oil out and clean up the inside a bit and call it good work 99% of the time.
this is why, teeth on the ring gear are damage,teeth on the pinion gear are cracked, the carier is sheared into 2 pieced, and the spider gears show ALOT of wear. also im keeping the gear ratio the same, just figured since everything in my diff is screwed i might as well try to go for a limited slip


also i resized the pics this time
1359223327029.jpg   1359223365929-1-.jpg   1359223409500.jpg   1359223498934.jpg   1359223457409.jpg  

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Unread 01-28-2013, 08:01 AM   #12
CSP
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Ouch!

Go to this page and download the Yukon Installation Kit instructions to see what all is involved in swapping a ring and pinion. You'll need some specialized tools and a lot of patience to do it correctly.
http://www.ringpinion.com/TechnicalHelp/HowTo.aspx
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Unread 01-29-2013, 04:10 PM   #13
NExOBLIVISCARIS
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but will the ring and pinion/ differential fit into my jeep? it says the differential is for a 30 spline dana 44, is that all i need to know? and how do i know if the ring and pinion is compatible?
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Unread 01-30-2013, 07:45 AM   #14
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The ring and pinion will work with the fact that they are standard cut (vs reverse cut used in Ford front 44s).

The carrier (differential) description doesn't give any information whether it's for 3.73 and lower (numerically) gearsets or 3.92 and higher gearsets. I can't say that I'd be buying from Amazon on a part like that either, along with the fact that Trac Locs aren't the most robust limited slip that you can buy. There's a lot of info on this site regarding them.

Another thing you'll need is a complete rebuild kit (what you called a rebuild kit above is NOT a rebuild kit). This will include any bearings, seals, and shims you'll need. Hopefully you read the .pdf file I referenced as it isn't a matter of unbolting the old and bolting the new back in its place.
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Unread 01-30-2013, 01:15 PM   #15
chromegrille
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another one bites the dust.....
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