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Unread 03-04-2011, 12:12 PM   #1
Ulricn1
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1992 YJ Wrangler 
 
Join Date: Feb 2011
Location: Dubai, N.a.
Posts: 5
Tire Size

Ok... I have been quite stupid of late with my mod's, and I kept thinking bigger is better! so I went and got some 33" shoes for my baby; however...

while I have no problem with the clearance (sometimes it rubs a bits, when the springs are tight - i have a 2.5" lift) it goes pear-shape on the road...

At "high" speed, the steering wheel vibrates heavily and I can hardly reach 70mph (110 kph) on the road. Also, i think it weaken my performance in soft sand!

Have I made a mistake? Are YJ not advised with that kind of tire size?

thanks for the future help!

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Unread 03-04-2011, 12:22 PM   #2
scubamc
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1991 YJ Wrangler 
 
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Location: USA
Posts: 1,399
When you put on the lift you change your driveline angles. You may need to install a transfer case drop or install a slip yoke eliminator.
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Unread 03-04-2011, 12:26 PM   #3
iDriveYJ
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1992 YJ Wrangler 
 
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The tires might also be improperly balanced, I have 33x12.50s, have had them for years, your wheel bearing might also be worn out.
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Unread 03-07-2011, 10:02 AM   #4
Ulricn1
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Join Date: Feb 2011
Location: Dubai, N.a.
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Tires Size VS. Re-gearing

After doing some research it seem that I may have to re-gear my axles, as I am running the std Dana 30/35 set-up.

If I do a re-gear, will I also need to upgrade my brake system? Also, if I re-gear a Dana 30/35, they are still quite weak (or so it seems), so wouldn't be better simply get a better axle?

If so, which axles could I use on a 92 YJ...

VERY confused...
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Unread 03-07-2011, 10:25 AM   #5
glenn-91YJ
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1991 YJ Wrangler 
 
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Location: , MA
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Quote:
Originally Posted by Ulricn1 View Post
After doing some research it seem that I may have to re-gear my axles, as I am running the std Dana 30/35 set-up.

If I do a re-gear, will I also need to upgrade my brake system? Also, if I re-gear a Dana 30/35, they are still quite weak (or so it seems), so wouldn't be better simply get a better axle?

If so, which axles could I use on a 92 YJ...

VERY confused...
Well you're not alone. I have a 4" lift with 5/8" booms and 33s, I don't have any issues with vibrations as I currently have a TC drop and 4* shims on the rear leafs. With the 4.0 we have 3.07 gears which really need to be 4.10s with 33s. You have a few options. I went out and picked up a nice D30 out of a 4 cyl which has 4.10 gears for $100. The guy needed to get out of his garage. I'm going to go through it and replace seals and check bearings.

For the rear I picked up a Ford 8.8 out of a 2001 Explorer with 4.10 gears. There's some fabrication work to swap in the 8.8 but well worth it and there's plenty of documentation here and online. I just rebuilt a TC but didn't do an SYE because I'm waiting until I get the 8.8 in.

As far as brakes go...yea an upgrade is probably the smart thing to do. I'm in the process of swapping in a dual diaphragm booster/MC from an 06 TJ. I have a thread documenting the swap. I'm at the point were it's ready to go in, make a couple new lines and bleed the system. Hopefully I get it done before the weekend.

Here's the thread...
http://www.jeepforum.com/forum/f12/0...my-yj-1177891/
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Unread 03-07-2011, 11:14 AM   #6
TheNewbie
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1995 YJ Wrangler 
 
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Your gearing won't effect steering vibrations. I'd start with making sure your wheels are balanced properly, and make sure your steering alignment is OK.
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Unread 03-07-2011, 11:30 AM   #7
glenn-91YJ
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Location: , MA
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X2 with TheNewbie...The steering wheel vibration is usually due to improperly balanced tires, bad wheel bearings, ball joints and tie rod/drag link ends. Did you have and vibration/shaking in the steering wheel before you put the 33" tires on?
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