What is making this happen

[BrunoPizz97]

I've had this rattle for a while now but it wasn't too bad until about a week ago. It would only make the rattle sound letting off in first, but now I would feel it going downhill in neutral. Very weird but this needs to be fixed before something else breaks, has anyone ever experienced this. I have attached videos please watch as this is begging to get really annoying on my drive to work.
The Jeep is sitting on
33" tires
2 1/2" short arm Rough country lift kit
1/4" TC drop
stock drive shaft
https://drive.google.com/file/d/1jvsn_N-RZvLq9GtW6o8TvzW4ya3zezoB/view?usp=sharinghttps://drive.google.com/file/d/1NaXBwSnVBlv9NgmjOKI05MdVl2lx8tpo/view?usp=sharing

 

[mrblaine]

I've had this rattle for a while now but it wasn't too bad until about a week ago. It would only make the rattle sound letting off in first, but now I would feel it going downhill in neutral. Very weird but this needs to be fixed before something else breaks, has anyone ever experienced this. I have attached videos please watch as this is begging to get really annoying on my drive to work.
The Jeep is sitting on
33" tires
2 1/2" short arm Rough country lift kit
1/4" TC drop
stock drive shaft
https://drive.google.com/file/d/1jvsn_N-RZvLq9GtW6o8TvzW4ya3zezoB/view?usp=sharinghttps://drive.google.com/file/d/1NaXBwSnVBlv9NgmjOKI05MdVl2lx8tpo/view?usp=sharing

Classic symptom of an incorrect rear pinion angle. If you can get someone to take off in the rig up a slight hill while you watch the rear pinion from the side, you'll see it jumping up and down. The issue has been there all along but now as the bushings have worn, the hopping is more pronounced.

Probably getting some wear in the trans mount as well.

 

[BrunoPizz97]

Classic symptom of an incorrect rear pinion angle. If you can get someone to take off in the rig up a slight hill while you watch the rear pinion from the side, you'll see it jumping up and down. The issue has been there all along but now as the bushings have worn, the hopping is more pronounced.

Probably getting some wear in the trans mount as well.

what would I have to do to correct the angle? do I drop the TC down more or should I get an SYE?? also I get vibes at at around 60-75mph

 

[mrblaine]

what would I have to do to correct the angle? do I drop the TC down more or should I get an SYE?? also I get vibes at at around 60-75mph

I do it with a SYE and adjustable control arms. Others do it in a variety of ways that I am not well versed in.

 

[BrunoPizz97]

I do it with a SYE and adjustable control arms. Others do it in a variety of ways that I am not well versed in.

any suggestions on sye and shaft setup

 

[BrunoPizz97]

any suggestions on sye and shaft setup

And I have adjustable control arms already

 

[JMT]

JB conversions SYE
Tom Wood DC driveshaft.
Then get rid of TCase drop

 

[BrunoPizz97]

min

JB conversions SYE
Tom Wood DC driveshaft.
Then get rid of TCase drop

mind attaching links so I can just order it, And will do get rid of the TC drop.

 

[mrblaine]

any suggestions on sye and shaft setup

There are many options. I tend to favor Tom Wood for his excellent quality and beyond reproach customer service. He has the AA SYE with shaft package on the site.

 

[BrunoPizz97]

This is what I am looking at, and I have no idea which one to get

 

[kmas0n]

Call up Tom Wood's, they will happily recommend everything you need and probably set up your order over the phone.

 

[tworley]

I recommend JB Conversions super short SYE Part #16-1201-1945
https://www.jbconversions.com/products/sye/np231j_short_sye.php
You will have to measure the length for the correct driveshaft. Plenty of directions here and Tom has been doing this long enough that he would help you easily.
http://www.4xshaft.com/TJWrangler.asp
This setup would change your gear driven speedo to a tone ring/hall sensor. You will need a speedo healer to correct it. Luckily this writeup just happened a week or so ago and details exactly how to make one.
https://wranglertjforum.com/threads/how-to-make-a-speedohealer-harness.27169/page-2#post-444092

 

[rasband]

The folks at Tom Woods can talk it through with you - just give them a call, they were really helpful when I was ordering my rear shaft.