Just a driveshaft or differential died ?

[ioniamichael]

Hi guys,
Recently I started to feel a strong BOOM in my legs when shifting into reverse gear. It only happens when I'm in 4x4, in 2x4 it's not happens.
Today I crawled under the car and this is what I discovered. Do you think overhauling the driveshaft will help here? Or should the front diff be replaced?

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[duderz7]

I wouldn't jump to replacement of either just yet. Definitely doesn't look like a problem with the drive shaft. A little play when switching between forward and reverse at the diffrential yoke is normal. It's hard to say if that's too much. I would first check all mounting hardware and bushings for the front diff as well as fluid level and condition.

 

[ioniamichael]

I wouldn't jump to replacement of either just yet. Definitely doesn't look like a problem with the drive shaft. A little play when switching between forward and reverse at the diffrential yoke is normal. It's hard to say if that's too much. I would first check all mounting hardware and bushings for the front diff as well as fluid level and condition.

Thank you very much, I'm from Israel, what kind of oil for fron diff you can suggest me ? It's very hot here in Israel =]
Jeep liberty 3.6 2006.

 

[duderz7]

I think with the heat I'd stick with the thicker stuff 75w-140. Not synthetic. Have you had a chance to check mounts and bushings?

 

[ioniamichael]

I think with the heat I'd stick with the thicker stuff 75w-140. Not synthetic. Have you had a chance to check mounts and bushings?

Not yet, tomorrow will do

 

[jeepop]

Lets see a picture of the back of that axle. My noise that sounded like the front differential actually came from the back cv on that axle, and that is one that is a wear item, not the front.

 

[ioniamichael]

Lets see a picture of the back of that axle. My noise that sounded like the front differential actually came from the back cv on that axle, and that is one that is a wear item, not the front.

Hi , thanks for your answer, yesterday I film this video that contains both sides of the axle.
The jeep is turned off, transfer in neutral position and gear in neutral too.

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[ioniamichael]

I think with the heat I'd stick with the thicker stuff 75w-140. Not synthetic. Have you had a chance to check mounts and bushings?

Can't find transimision mount , can you please explain where it should be located?

 

[turblediesel]

Can't find transimision mount , can you please explain where it should be located?

In between the bottom of the transmission and top of the crossmember.

 

[duderz7]

I was talking about differential mounts. Here's a picture of a differential and its mounts. As you can see there are 3 brackets that both to the diffrential housing that have bushings. Check hardware and bushings. While you're there take a close look at the diffrential itself, they've been known to crack usually at the back where the drivshaft comes in.

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[ioniamichael]

I was talking about differential mounts. Here's a picture of a differential and its mounts. As you can see there are 3 brackets that both to the diffrential housing that have bushings. Check hardware and bushings. While you're there take a close look at the diffrential itself, they've been known to crack usually at the back where the drivshaft comes in.

Hey, thanks a lot !
You are talking about the 3 mount I marked , right ?

 

[jeepop]

I can barely see the boot on the rear shaft cv, do I see a tear? Also bang the rear up vs just twisting it.

 

[duderz7]

Hey, thanks a lot !
You are talking about the 3 mount I marked , right ?

Yes sir, I thought I saw a little movement in the diffrential as a whole in your first video.

 

[jeepop]

I watched again. I think I see evidence of grease having leaked out the rear cv in the picture, and I kind of think I see some tears in the boot.