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-   -   Axle swap problem (http://www.wranglerforum.com/f210/axle-swap-problem-255811.html)

97tjsport 07-14-2013 08:51 PM

Axle swap problem
 
Ok so I just swapped in a D44 into my 97 TJ and now the pinion angle is way off. The D44 came out of a stock 01 TJ. The pinion angle was fine with the D35 before I took it out. All I did was swap the D35 out for the D44. What is the Different in the stock TJ D44 versus the Stock D35 that it throws the pinion angle off so much that I need adjustable uppers to fix it. I'm just confused, There both stock TJ axles and the D44 I thought would bolt right up with no problems. I'm hoping someone will help me understand what the difference is or what I have wrong. Here is some pics.

This is what it looked like before the swap D35
http://i19.photobucket.com/albums/b1...psa0f3011d.jpg
After swap D44
http://i19.photobucket.com/albums/b1...ps03a46005.jpg
http://i19.photobucket.com/albums/b1...ps2831f74f.jpg

NJO 07-14-2013 09:00 PM

WTF is going on with those rear lower control arms? The ones pictured with the D44 installed..........

97tjsport 07-14-2013 09:06 PM

there pro comp boxed control arms

Big Cole 07-14-2013 09:12 PM

Did you replace the stock LCAs with the pro comp arms during the swap? If so, the pro comp arms are longer this rotating your pinion angle down.

97tjsport 07-14-2013 09:24 PM

Quote:

Originally Posted by Big Cole (Post 3962238)
Did you replace the stock LCAs with the pro comp arms during the swap? If so, the pro comp arms are longer this rotating your pinion angle down.

I put them side by side before I installed them and they where the same length. I stuck the bolt in the stock arms and the bolt lined up with the pro comp ones. So how are they longer?

Big Cole 07-14-2013 09:41 PM

My bad. Figured the pro comp arms would be longer.

All Terrain JK 07-14-2013 09:43 PM

I don't know if it's enough to cause that much misalignment but I'm pretty sure the D44 yoke is an inch or so closer to the tcase than the D35. Either larger housing or longer pinion.

97tjsport 07-14-2013 09:46 PM

Quote:

Originally Posted by Big Cole (Post 3962362)
My bad. Figured the pro comp arms would be longer.

its cool, trust me I thought of that to lol

97tjsport 07-14-2013 09:48 PM

Quote:

Originally Posted by All Terrain TJ (Post 3962372)
I don't know if it's enough to cause that much misalignment but I'm pretty sure the D44 yoke is an inch or so closer to the tcase than the D35. Either larger housing or longer pinion.

yea but it came out of another TJ that is set up just like mine.

All Terrain JK 07-14-2013 09:57 PM

If I'm understanding correctly the donor TJ was factory with D44 while yours was D35. If that's correct, when you swapped in the D44 it shortened your drive shaft and caused a steeper angle.

solman 07-14-2013 09:57 PM

Did you reattach your rear sway bar and take it for a ride yet?

solman 07-14-2013 09:59 PM

Quote:

Originally Posted by All Terrain TJ (Post 3962453)
If I'm understanding correctly the donor TJ was factory with D44 while yours was D35. If that's correct, when you swapped in the D44 it shortened your drive shaft and caused a steeper angle.

Looking at the exposed area of the shaft where the slip is Id say they look the same length to me.

All Terrain JK 07-14-2013 10:01 PM

It does look that way but while researching to do the same swap I was sure I read that.

97tjsport 07-14-2013 10:06 PM

Quote:

Originally Posted by All Terrain TJ (Post 3962453)
If I'm understanding correctly the donor TJ was factory with D44 while yours was D35. If that's correct, when you swapped in the D44 it shortened your drive shaft and caused a steeper angle.

im not sure it doesn't look like enough of a difference to change the angle that much

Quote:

Originally Posted by solman (Post 3962454)
Did you reattach your rear sway bar and take it for a ride yet?

yes and I get drive line vibration under acceleration from about 1500 to just over 2500 rpm.

All Terrain JK 07-14-2013 10:14 PM

Ok I found the thread I was thinking of. The posters TJ was an auto and the donor d44 was from a manual. The drive shaft was one inch to long. I apologize. :)

97tjsport 07-14-2013 10:19 PM

Quote:

Originally Posted by All Terrain TJ (Post 3962538)
Ok I found the thread I was thinking of. The posters TJ was an auto and the donor d44 was from a manual. The drive shaft was one inch to long. I apologize. :)

ahhh ok. yes both donor and mine are manuals. hopefully someone will know why im having this problem. Plus I have a SYE. I have upper adjustable ones on the way but im trying to figure out why I even need them at all.

All Terrain JK 07-14-2013 10:31 PM

Looking very closely i see old springs on the floor near the old axle and new springs on the Jeep. Did you install a lift?

97tjsport 07-14-2013 10:34 PM

it already had a lift I just swapped springs.

All Terrain JK 07-14-2013 10:38 PM

Did you gain any height? Not trying to pester you just help work though the problem.

97tjsport 07-14-2013 10:40 PM

Quote:

Originally Posted by All Terrain TJ (Post 3962641)
Did you gain any height? Not trying to pester you just help work though the problem.

no your good. no its the same height 4in. just new springs with less miles on them.

97tjsport 07-15-2013 07:51 AM

bump. hopefully someone can help

O_M_Jeep 07-15-2013 08:18 AM

If your running a 4" lift and a SYE then it's past time you had adjustable control arms, perhaps you should find out what the stock arm length is on a TJ equipped with a D-44, the Procomp arms may be the same as your old arms, but your old arms were holding in a D-35, not a 44.

00silverTJ 07-15-2013 05:38 PM

Bump. I am curious as to what is going on. Good luck

97tjsport 07-15-2013 09:21 PM

Quote:

Originally Posted by O_M_Jeep (Post 3963620)
If your running a 4" lift and a SYE then it's past time you had adjustable control arms, perhaps you should find out what the stock arm length is on a TJ equipped with a D-44, the Procomp arms may be the same as your old arms, but your old arms were holding in a D-35, not a 44.

its a stock D44 out of a TJ. My question is what is the difference in the D44 that it would do this? When you order a lift, you order it for a TJ. It doesn't ask if it has a D44 or D35 in it. So obviously there shouldn't be any difference in the two. Everything is the same in the suspension regardless of what rear-end is in it. Ive been running a 4in lift for 5 yrs with no adjustable uppers and at least 6 months with the lift and SYE with no problems. I pull the D35 out and swap in a D44 and this is what happens.

Mulvihill64 07-15-2013 10:15 PM

You didn't happen to do anything to change the height of the transfer case did u? If not, maybe your old springs had sagged?

TJDave 07-15-2013 10:25 PM

Weird for sure. Should not be that big of a difference if swapping stock for stock.

Did you happen to compare the control arm brackets on both axles while they were sitting next to each other on the garage floor?

I know you said your D44 is all stock, but sometimes people weld different brackets on if they tear one off.

My control arm brackets were all aftermarket on my D44 donor axle. But I had adjustable arms so it didn't really matter.

Definitely curious to find out what it is. Good luck.

2JeepsThatRun 07-15-2013 10:36 PM

I've talked to my local driveline shop before about this your drive shaft needs to be shortened about 1.5-2 inches the dana 44 is longer at the yoke and the reason a lift is able to be put on either a d35 or d44 jeep is because the stock driveshafts are different for each. Also when you buy a cv shaft that is pre-measured for a lift height it asks or tells you what axle it is for.

All Terrain JK 07-16-2013 06:21 AM

Quote:

Originally Posted by 2JeepsThatRun (Post 3966626)
I've talked to my local driveline shop before about this your drive shaft needs to be shortened about 1.5-2 inches the dana 44 is longer at the yoke and the reason a lift is able to be put on either a d35 or d44 jeep is because the stock driveshafts are different for each. Also when you buy a cv shaft that is pre-measured for a lift height it asks or tells you what axle it is for.

As I stated in my first post, I thought that was the case. Then I second guessed myself. Thanks for the confirmation. :thumb:

00silverTJ 07-16-2013 06:31 AM

If your willing to start from zero and entertain some questions, it could be helpful but could also be annoying and frustrating.

How do you know what the axle came from? Did you take it off? Can you be sure it was stock? Can you post a pic of the diff cover?

Again, I don't mean to insult or annoy, but, just going from memory, that pumpkin doesn't strike me a resembling a d44.

Just trying to help, it's quite the mystery.

NJO 07-16-2013 09:42 AM

Need a lot more pics......closeups of the brackets on the new axle, the pumpkin.......pics that allow you to see the orientation between the pumpkin and the brackets etc........


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