Dana 44 Gear Sets Question

I've been looking for a while for a set of 4:88 gears for my dana 44 flanged axle. after I bought a set of axles with 4:27's in them and swapped everything into my axles i found a set of 4:88's. needless to say i was bummed but bought them anyways just in case i did not like the 4:27's. i cannot remember what the spline count was on the 4:27's
question i have is that the 4:88's (or 4:89 if you really want to get technical) have a 10 spline pinion shaft and from what oldtime is saying is that a 71 should have a 27 spline pinion? will this 10 spline unit be a drop in or should i look for the right stuff for my axle? the parts i have now are 10 spline pinion with 9 teeth and a ring gear with 44 teeth. the weird thing about the pinion is that i cannot find the 18534 in any of my pdf's but there is another number barely readable stamped on the other side of the shaft and it resembles 32367 which is in the book and is a match with the ring.


http://i890.photobucket.com/albums/...3-4E95-4448-9132-5A6B5403C468_zpsy74nngvq.jpg
http://i890.photobucket.com/albums/...A-6387-4BA5-8293-2E8DF7B60710_zpsfiznegqk.jpg
http://i890.photobucket.com/albums/...7-0999-43B1-A749-C965740FF837_zps3h4nzsjx.jpg
http://i890.photobucket.com/albums/...3-AAA7-4561-B55C-71954B69D777_zpsofaepil4.jpg


also the ring gear bolts have these little washers on there like to fit better on the carrier
http://i890.photobucket.com/albums/...0-81BC-4ABB-86B9-9DB3772AB62F_zps0kbaygy4.jpg

 

My info confirms yours.
Ring 18525 is matched to both pinions 18524 and 32367.
18534 is not listed in my info.

 

so now that we both have the same conclusion that makes me feel better that this is a matching set. makes me wonder if someone else has a different source of info. am i able to use this ring and pinion in my flanged axle or is it specific to the taper axle? and what about those little spacers?
i bought this from craigslist a while back and remembering asking the guy what it came out of but cannot remember if it was a flanged or tapered axle. looks like i really need to start tagging my inventory.

 

The gears will move from tapered to flanged as long as you use the yoke with matching spline count.
The carriers will not. Flanged has 30 spline axles and tapered is either 10 or 19.
So if you put the 4.88 ring on the carrier with the correct axle spline count it should work.
The side gears don't exchange between to carries.

 

CJ RING and PINION (miscellaneous info)

Rings and pinions from one model of Dana axle will not fit any other model of Dana axle.
The only exceptions are the Dana 23-2 and Dana 25 differential gears.
Those two models of axles use fully interchangeable differential components.

The 1941-1945 MB, GPW used a Dana 25 front axle and Dana 23-2 rear axle with 4.88 final drive ratio (FDR )
4.88 FDR = 39/8 tooth count.
All CJ FDR's were standard at 5.38 with no options until 9-1962 (early 1963 model year)
5.38 FDR = 43/8 tooth count

The very early CJ-2A used a Dana 25 front axle and Dana 23-2 rear axle.
CJ-2A very soon went to Dana 41 rear axle.
1949 CJ-3A began with Dana 41 rear axle and changed to the Dana 44 rear axle in 1951.
Beginning in 1951 the Dana 44 rear with Dana 25 became the time proven standard for all CJ's.

In 1961 the Dana 27 front axle was initially introduced for a short time only.
In the 1963 model year the Dana 27 front axle was re-introduced into the CJ line.
This reintroduced Dana 27 uses a fine spline pinion yoke having 26 involute splines.

Early in 1963 model year (9/1962) Willy's made the 4.27 FDR standard on all CJ's with 5.38 FDR as an option.

The Dauntless engine option began production in late 1965.
Post 1965 CJ's with D-225 option were standard with 3.73 FDR having 41/11 tooth count
Post 1965 CJ's with D-225 option were optional with 4.89 FDR having 44/9 tooth count
Post 9-1962 CJ's with F-134 were standard with 4.27 FDR having 47/11 tooth count
Post 9-1962 CJ's with F-134 were optional with 5.38 FDR having 43/8 tooth count

All early CJ's and Jeeps use course splined pinion yokes.
All CJ's use fine splined front pinion yokes after the 1963 Dana 27 re-introduction.
All CJ's use fine splined rear pinion yokes after the change to flanged axles.
The change to flanged rear axles began as early as late 1969 on some CJ's.
All post 1970-1/2 CJ axles use fine splined rear axle pinions regardless of the FDR.

The yoke spline was changed in order to increase the yoke to pinion strength.
The finer splines effectively increases the "minimum" pinion shaft "diameter" by decreasing the spline depth.
The involute splines increases the spline face as compare to a straight cut spline.
Straight cut splines have parallel faces while involute spline faces are tapered.

Note that some early Jeep SW models used Dana 44 rear axle with 4.88 FDR having 39/8 tooth count and course pinion splines.
Early Jeep PU never used Dana 44 rear axles.

Remember ring and pinion gears are machined as matched sets.
Do not mix match ring and pinions having similar tooth counts.

 

This with one exception. The ring gear bolts to the differential CASE. The carrier is the cast "pumpkin" the axle tubes are pressed into and that houses the ring and drive pinion, differential case, bearings, etc.

 

I don't think anyone answered the question about the washers on the ring bolts.

 

I've never seen spacers like those used on a STOCK Dana 44. I have seen them used occasionally in oddball conversions. Especially in Imports where a locker or limited slip from one application is used in another. I never liked them as I feel they allow too much movement between components and risk of bolt failure is high. The other time Ive seen them used us if the ring gear bolt holes were damaged on a differential case and they were machined oversize and spacers were used to compensate.

 

In my previous I forgot to mention that none of the Jeep front axles ever used 4.89 gear sets.(44/9)
D25, D27 and D30 front differentials only hadt 4.88 (39/8 ) and never have 4.89 (44/9).
This brings us to the big question of 4.88 vs 4.89 !
4.88 has fewer teeth so they are obviously thicker at the root.
4.89 has more teeth so that would obviously decrease wear over time because the total area of the tooth faces is slightly increased.
Dana must have determined that increasing tooth contact area was more important than extra shear strength of the 4.88 design.

 

this is what i was thinking too but wanted to make sure as i don't want a failure in the axle. i will have to make sure the diff case holes are the right size for those bolts.

 

Yes jeep most definitely did use (44/9) gears in there front Dana 44 axles.

18524 will be stamped on the yoke.
Used in the 6-226 truck--1960-64-
fc-170 and a few others

 

The reason for this 4:89 ratio used in a front axle is because it is a Dana 44 that is used on the FC170's, and perhaps full-size pickups. The preceding discussions above mainly pertains to the smaller Jeeps that use the Dana 25,27, or 30 in the front axle. You ratio is the same that could be found in a Dana 44 in the rear axle of the smaller (CJ) Jeeps.
-Donny

 

Technically speaking this set seen in link will meet the service standards (optional equipment ) for a 1970 -1971 CJ.
NOS Genuine DANA 44 Ring & Pinion SET # 23053-1X 4.89 Ratio Jeep # 936137

That's because it has the 26 spline pinion.
Jeep used 10 spline pinions in CJ's prior to 1970.
4.88 and 4.89 ratios are not a factory CJ option after 1971.

This part number (936137) came onto the Jeep books in 1965 but CJ's continued to use ten spline rear prior to 1970.
I expect that all Renegades even those early ones manufactured in 1969 use the 26 spline version.

 

You said non of the (JEEP) front axles used 44/9 gears.

That is wrong and could potentially confuse many people that read your words on this website as it did me when I first read it and believed it.

 

I suppose your referring to this:

Well i try to state correct facts but most anything can be misconstrued.
In the very next sentence I noted D25, D27 and D30 and specifically omitted D44 front axles
Truth is this particular post is in under the Early CJ-5 and 6 heading.
So any facts contained herein were basically intended for those particular models of Jeeps.
As you know or should know any D44 front axle assembly was NEVER a CJ option.

So I'm sticking to my guns claiming that no CJ front axles used a 4.89 ratio.

Sorry if you were mislead and thanks for searching out detail

 

I was just trying to clarify that indeed there are 4:89 Dana gears that can be in front axles of Jeeps, but they are only in larger Jeep trucks with the D44 axle in front.
I completely stand by Oldtime's breakdown of ratios by axle series, and that the discussion here centers around the smaller CJ series Jeeps. Sorry for any confusion.
-Donny