Novak Conversions Jeep Wrangler TJ engine mounts

Yukon Free Spin / Wheel Suggestions

Soldmytaco

TJ Enthusiast
Original poster
Joined
Apr 18, 2022
Messages
127
Location
North Carolina
Long story short - I am one of the unlucky people that got stuck with vibes after my re gear. I am down to having to go with the free spin kit in order to solve this problem. I have run into an issue with trying to find wheels that will be compatible with the free spin kit without having to bore out the center wider. I would also like to try and stick with 5x4.5 and 15x8. I was looking at mammoth boulders. Apparently these would work on paper but I saw someone on the forum saying that they actually aren't wide enough. Should I be too concerned with steel vs aluminum? I have really tried to keep my build light and nimble and would prefer aluminum. But I would be curious on others thoughts that know more than me. Thank you
 
How have you ruled out pinion angle as causing the vibrations? The front end can be sensitive to pinion angle when RPMs increase at highway speed. The right DS balancing shop might also be a cure if you haven't already tried that. Getting the balance done at a higher than normal speed can also make difference.
 
Unfortunately I don't have the proper tools to do that. I have never installed a free spin kit so I am having to rely on a shop for the install. They wouldn't get into boring out the center.

Let me know if you need any help . I can make a CAD template for you, similar to the one I made for my build. While it was to bore out the brake rotor, a similar template can be used for a wheel. I'm starting another build using a HP Dana 44 out of an older ford (5x5.5"). It has a 88mm hub and I'm going to put wheel adapters on it to get the axle a little wider and run a JK 5x5 beadlock with a 72mm hub bore so I'll have to bore out the wheel to 88mm (~3.5")

https://wranglertjforum.com/threads/stretched-tjk-bigger-rubber-extra-inches.59716/post-1623210
 
How have you ruled out pinion angle as causing the vibrations? The front end can be sensitive to pinion angle when RPMs increase at highway speed. The right DS balancing shop might also be a cure if you haven't already tried that. Getting the balance done at a higher than normal speed can also make difference.

Pinion angle in the rear is perfect or really good. Front drive shaft is brand new from Olivers , Rear drive shaft is brand new from Adams. Pinion angle on the rear is good. Front is good as can be I believe. Both driveshafts were balanced at Olivers Driveline and gear. When front shaft is removed all vibes go away and Jeep drives as it should. As soon as front driveshaft is connected the vibes are very bad around 50 - 60 mph and get worse as you go faster. This all began after regearing to 4.88. Before that I didn't have vibrations. Turned into a cyclical harmonic vibration after re gearing.
 
Let me know if you need any help . I can make a CAD template for you, similar to the one I made for my build. While it was to bore out the brake rotor, a similar template can be used for a wheel. I'm starting another build using a HP Dana 44 out of an older ford (5x5.5"). It has a 88mm hub and I'm going to put wheel adapters on it to get the axle a little wider and run a JK 5x5 beadlock with a 72mm hub bore so I'll have to bore out the wheel to 88mm (~3.5")

https://wranglertjforum.com/threads/stretched-tjk-bigger-rubber-extra-inches.59716/post-1623210

Thank you Sierra!
 
Novak Conversions Jeep Wrangler TJ engine mounts