Dana 44 pinion gear pitting |
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ndnchf
Member Sponsor Member x 2 Joined: 22 Sep. 2017 Location: Virginia Status: Offline Points: 2177 |
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Posted: 11 Feb. 2019 at 10:12pm |
I've got this D44 rear axle that I'm tearing down for a rebuild, with hopes of putting in my CJ2A. Everything is in surprisingly good condition except three teeth on the pinion gear. This rear end must have sat for quite a while before I got it. It had oil in it and no water was inside. But three teeth had some rust on them (I assume they were above the oil level for a long time).
I soaked the pinion in evaporust and lightly sanded the rusted areas with 400, then 500 grit. I'd like your opinion - is it useable? Would it tear itself up? Ok, for general purpose use? My plan was to reassemble it with new bearings, seals and clean and repaint the housing. I really hadn't planned on spending another 200-300 on gears. Here is what it looked like when I took it out. Here it is after some clean up. |
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1948 CJ2A - It goes nowhere fast, but anywhere slow.
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duffer
Member Joined: 02 Feb. 2012 Location: Bozeman, MT Status: Offline Points: 1076 |
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If it was mine, I wouldn't run those. IMO, it's just too much work setting a Dana up knowing that the service life of those will very likely be short. Ratio?
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1955 3B: 441sbc,AGE 4 speed transmission, Teralow D18w/Warn OD, 4.11:1 D44's/ARB's, glass tub & fenders, aluminum hood/grill, 8274, York OBA, Premier Power Welder; 67 CJ5: 225,T86AA, D18, 4.88's, OD
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ndnchf
Member Sponsor Member x 2 Joined: 22 Sep. 2017 Location: Virginia Status: Offline Points: 2177 |
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5.38
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1948 CJ2A - It goes nowhere fast, but anywhere slow.
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SE Kansas 46 CJ-2A
Member Sponsor Member x 3 Joined: 22 Jan. 2016 Location: S.E. Kansas Status: Offline Points: 3183 |
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You could run it, but it will more than likely be noisy. Consider also that any material that comes off this gear as it wears at the rust points will go through the bearings as the gear oil circulates in the housing. Bearings are precision ground, polished and close tolerance creatures. If it were me I would replace, save the old gearset so that the setup on the new gearset will be easier because of the headmark on the pinion. If you replace with a genuine Dana-Spicer gearset, it is just a matter of some math to get the pinion depth right on the new gearset by comparing headmarks. Other brands of gears not so easy...
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46 CJ-2A #64462 "Ol' Red" (bought April 1969)(second owner)(12 V, 11" brakes, M-38 frame, MD Juan tub)
U.S. Coast Guard Chief Petty Officer(ret.) U.S. Army Vietnam veteran and damned proud of it. |
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nofender
Member Sponsor Member x 3 Joined: 10 May 2016 Location: Maryland Status: Offline Points: 2018 |
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I've run worse.
All depends on what you are doing with the Jeep. Lots of miles a year? Then not the best idea. Occasional use? Probably last forever. And yes be a bit noisy over time and yes probably be tough to get a good gear pattern on. But I don't see an overall strength concern if the rest of the drivetrain is stock. If you have some time - I can see what my parts 44 R+P look like. Maybe i have a better set for you.
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46 CJ2a rockcrawler
46 CJ2a - 26819 46 Bantam T3c "4366" 47 Bantam T3C - 11800 68-ish CJ5 |
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Stev
Member Sponsor Member Joined: 27 July 2016 Location: Cincinnati Status: Offline Points: 2383 |
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Might try adding Limited slip modifier to see if that helps
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Stev
1946 CJ2A Trail Jeep (The Saint), 1948 CJ2A Lefty Restored |
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ndnchf
Member Sponsor Member x 2 Joined: 22 Sep. 2017 Location: Virginia Status: Offline Points: 2177 |
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All stock drivetrain. Just around town fun driving, no serious off road use. I have a set of 11" brakes to add to it. This is a learning project for me, no big hurry. The axle in the jeep now seems to be fine. My thought is to swap this one in at some point in the future.
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1948 CJ2A - It goes nowhere fast, but anywhere slow.
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berettajeep
Member Sponsor Member Joined: 03 Feb. 2009 Location: Astoria OR Status: Offline Points: 4304 |
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If it were me, I would use it as practice and rebuild it knowing I may have to rebuild it again in the future. I have no real experience with rebuilding axles and would rather mess up on something I know is not in perfect shape to begin with. |
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Mark W.
Member Sponsor Member Joined: 09 Nov. 2014 Location: Silverton, OR Status: Offline Points: 7923 |
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SVL gears are $159.00 from Summit add an install kit for $90 and you have a good axle not chewing itself up.
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Chug A Lug
1948 2A Body Customized 1949 3A W/S 1957 CJ5 Frame Modified Late 50's 134L 9.25"clutch T90A D18 (1.25") D44/30 flanged E-Locker D25 5.38 Since 1962 |
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ndnchf
Member Sponsor Member x 2 Joined: 22 Sep. 2017 Location: Virginia Status: Offline Points: 2177 |
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The two they list are 26 spline pinion. Mine is 10 spline.
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1948 CJ2A - It goes nowhere fast, but anywhere slow.
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Bill2A
Member Joined: 01 Mar. 2018 Location: Fort Worth, Tex Status: Offline Points: 516 |
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Didn't I see in another thread where you had two 44s to tear down?
Maybe the other gear set is better.
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1946 CJ2A 14098
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ndnchf
Member Sponsor Member x 2 Joined: 22 Sep. 2017 Location: Virginia Status: Offline Points: 2177 |
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I wish that were the case, but no. I had two T90s and two D18s, but only one spare D44 and one spare D25.
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1948 CJ2A - It goes nowhere fast, but anywhere slow.
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ndnchf
Member Sponsor Member x 2 Joined: 22 Sep. 2017 Location: Virginia Status: Offline Points: 2177 |
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I see a variety of new 5.38 gear sets available, but most seem to be with 26 spline pinions. Mine is a 10 spline. To use a 26 spline pinion, is it just a matter of changing the yoke or are there other difference that would make it a problem to install these in my early D44?
I also see "reverse cut" gears as well as regular gears. What's the deal with these?
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1948 CJ2A - It goes nowhere fast, but anywhere slow.
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nofender
Member Sponsor Member x 3 Joined: 10 May 2016 Location: Maryland Status: Offline Points: 2018 |
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26 spline should be just fine if you go that route. Reverse cut is a Ford front axle application. Essentially the pinion is moved up and reversed to drive the front. This way power isn't going to the coast side of the gears as is the case with most front axles. Said to be much stronger in a front end applications. These can not be used in a low pinion housing such as yours. Some use the high pinion center sections to build high clearance D44 rear axles. If moved to the rear however you are now running on the coast side of the reverse cut gear - negating it's strength. Never understood that mod other than for clearance. Ford also made a high pinion D60 front. Jeep has played around with reverse cut high pinion front axles stuff in later D30 and D44 application for TJ's, JK's and Cherokees, if my memory serves me correctly.
Edited by nofender - 12 Feb. 2019 at 1:57pm |
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46 CJ2a rockcrawler
46 CJ2a - 26819 46 Bantam T3c "4366" 47 Bantam T3C - 11800 68-ish CJ5 |
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oldtime
Member Joined: 12 Sep. 2009 Location: Missouri Status: Offline Points: 4139 |
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The only problem with using a 26 spline yoke is that your front and rear yokes can no longer be interchanged. I have some genuine NOS Dana 10 spline pinion shaft gear sets available but they are 4.89 ratio for a D44 and 4.88 ratio for a D25 or D23-2.
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Currently building my final F-134 powered 3B .
T98-A Rock Crawler using exclusive factory parts and Approved Special Equipment from the Willys Motors era (1953-1963) Zero aftermarket parts |
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