dana35 to dana44a - JeepForum.com
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post #1 of 33 Old 10-16-2019, 05:01 PM Thread Starter
joev3211
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dana35 to dana44a

hey guys can anyone tell me if there is an issue swapping in a dana44a from a 98 into my 94 5.2l? both are 4x4 and v8s, i was just looking for a bit of a stronger axle and to eventually run some bigger tires, i plan on adding a truss and skid plate. but as far as the swap itself goes, is there anything that is different or can it really be that easy, just a direct bolt in? is the yoke the same lengths for these years?

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post #2 of 33 Old 10-16-2019, 05:07 PM
riverzj
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Should be bolt in. get the same gears. Might run into issue with driveshaft length/yolk difference.


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post #3 of 33 Old 10-16-2019, 05:13 PM Thread Starter
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so there is a different yoke on the dana44a?
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post #4 of 33 Old 10-16-2019, 05:27 PM
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Originally Posted by joev3211 View Post
so there is a different yoke on the dana44a?


I know that you will have to change driveshaft length. Pretty sure itís shorter by about 3Ē. If you have it lifted 4Ē or more you could be fine. Ujoint at the dana44 is bigger I think. 1310/1330 hybrid?? But all control arms/springs/shocks from a 98 ZJ rear ended bolt into any Zj.


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post #5 of 33 Old 10-16-2019, 05:37 PM Thread Starter
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Originally Posted by riverzj View Post
I know that you will have to change driveshaft length. Pretty sure itís shorter by about 3Ē. If you have it lifted 4Ē or more you could be fine. Ujoint at the dana44 is bigger I think. 1310/1330 hybrid?? But all control arms/springs/shocks from a 98 ZJ rear ended bolt into any Zj.


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Okay the Jeep is going to get a 4.5 inch lift before I install that axle so my driveshaft length should be good then, but what do I do about that u joint? Buy a smaller one?


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post #6 of 33 Old 10-16-2019, 06:16 PM
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Originally Posted by riverzj View Post
If you have it lifted 4” or more you could be fine. Ujoint at the dana44 is bigger I think. 1310/1330 hybrid??
From experience, even 5.5" of lift was not enough to make the old drive shaft work. It will need to be shortened or replaced.

The only ZJ D44As that used a 1330 yoke were the ones installed in the '98 5.9L. All D44As behind 5.2Ls used the standard 1310 yoke.

The axle is basically bolt-in, the only issue you might find (apart from drive shaft length) is that the diff breather vent is on the opposite axle tube compared to the D35.
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post #7 of 33 Old 10-16-2019, 06:19 PM Thread Starter
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Originally Posted by CatSplat View Post
From experience, even 5.5" of lift was not enough to make the old drive shaft work. It will need to be shortened or replaced.

The only ZJ D44As that used a 1330 yoke were the ones installed in the '98 5.9L. All D44As behind 5.2Ls used the standard 1310 yoke.

The axle is basically bolt-in, the only issue you might find (apart from drive shaft length) is that the diff breather vent is on the opposite axle tube compared to the D35.


Thankyou this helps a lot. Could I just use the driveshaft off of the 98 that Iím getting the axle from?


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post #8 of 33 Old 10-16-2019, 06:21 PM
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there will be drive shaft and yoke differences so if you are pulling a used unit pull everything including the tailpiece off the xfer case...
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post #9 of 33 Old 10-16-2019, 06:26 PM
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Originally Posted by joev3211 View Post
Thankyou this helps a lot. Could I just use the driveshaft off of the 98 that I’m getting the axle from?


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You can always measure and find out, but it's very unlikely it will work. Your '94 has a 46RH trans that's quite a bit longer than the later 44RE , so the '98 shaft is probably even longer than your current one.

If you have adjustable rear UCAs and LCAs, you can probably extend your wheelbase enough to make your current shaft work. Otherwise you're best off taking measurements and going junkyard hunting (one of the longer XJ shafts might work), or having your current shaft shortened.

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post #10 of 33 Old 10-16-2019, 06:30 PM
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there will be drive shaft and yoke differences so if you are pulling a used unit pull everything including the tailpiece off the xfer case...
You cannot be serious. Why would he want another too-long drive shaft? What yoke difference? What tailpiece?

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post #11 of 33 Old 10-16-2019, 06:34 PM
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You cannot be serious. Why would he want another too-long drive shaft? What yoke difference? What tailpiece?


Off of the transfer case. Different years have different splines/lengths. If I were him I wouldnít mess around with cutting driveshafts. Just get a custom one built to length, easy to get one these days.


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post #12 of 33 Old 10-16-2019, 06:39 PM
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Off of the transfer case. Different years have different splines/lengths.
Every single ZJ ever produced used the exact same spline design on the rear transfer case output. Yes, some were ESY and some were ISY - still, same splines and it doesn't make a difference to the drive shaft apart from overall length.

That aside, how do you figure one would go about removing said tailpiece, anyway? The splines are milled directly onto the mainshaft, it's not like you can just pop off the rear output and go swap it onto a different case.

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post #13 of 33 Old 10-16-2019, 06:41 PM
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Yes I can be serious, Ive done it, the back of almost every transfer case in a Grand Cherokee has a tail piece, and they can be changed to compensate for shaft length due to axel swaps and lifts. If you spent some time doing research and less time chewing on your foot you would know this.
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post #14 of 33 Old 10-16-2019, 06:45 PM
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Its bolted on to the back of the transfer case, It houses the output shaft of the xfer case, In some cases, it makes up for length differences. And i never said a thing about spline count.
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post #15 of 33 Old 10-16-2019, 06:47 PM
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Originally Posted by RevScott View Post
Yes I can be serious, Ive done it, the back of almost every transfer case in a Grand Cherokee has a tail piece, and they can be changed to compensate for shaft length due to axel swaps and lifts. If you spent some time doing research and less time chewing on your foot you would know this.
Again, the rear output splines are milled into the one-piece mainshaft. The ISY tailcone is just a seal/speed sensor holder and has precisely nothing to do with output length or yoke travel.

But please, I'd love to see some pics of these ZJ "tailpieces" you've swapped.

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