driveshaft vibrations
CF Veteran
Joined: Sep 2010
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From: NC
Year: 1998
Model: Cherokee
Engine: 4.0 L
I believe that rustys makes a tcase crossmember that lowers your tcase 1" without losing any clearence... If you can't afford to loose a whole inch
Last edited by Jeepxj1234; Aug 1, 2011 at 01:25 PM.
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Model: Cherokee
Someone else posted this recently but had a 2wd Jeep. He put a 3" lift on it an had the stock DS as well and got vibes. I believe what he did was installed the shim the opposite way you normally would with a SYE so he could point the rear pinion down instead of up so the angles were correct again. There is no way we would be able to tell you the exact shim you need. We could be approximate but if it's wrong you'll be doing it again. You really need an angle finder and figure out the shim you need for your specific set up.
I've noticed that the early to mid 90's XJ's can get away more with stock shafts without vibrations. It's odd that at only 3 inches it's that bad. But not all XJ's are the same.
You can absolutely do a TC drop. You will loose about an inch of clearance. I had no problem climbing over stuff with that loss though. I ran one on mine for over a year with my 3 inch and even had it for a short time with the 4.5 inch until I did it correctly and installed the SYE. It's a cheap alternative to help out angles until you can get up the money for the more expensive kit. Let's face it, times are hard and play money is harder to come by sometimes. TC drop approx $25 SYE approx $200. Then you also need a shaft which is more $$$.
Oh and Slick, your PM box is full buddy. I tried to PM you and it wouldn't let my message send to your account.
I've noticed that the early to mid 90's XJ's can get away more with stock shafts without vibrations. It's odd that at only 3 inches it's that bad. But not all XJ's are the same.
You can absolutely do a TC drop. You will loose about an inch of clearance. I had no problem climbing over stuff with that loss though. I ran one on mine for over a year with my 3 inch and even had it for a short time with the 4.5 inch until I did it correctly and installed the SYE. It's a cheap alternative to help out angles until you can get up the money for the more expensive kit. Let's face it, times are hard and play money is harder to come by sometimes. TC drop approx $25 SYE approx $200. Then you also need a shaft which is more $$$.
Oh and Slick, your PM box is full buddy. I tried to PM you and it wouldn't let my message send to your account.
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Joined: Jan 2011
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Thank you. I'll have to figure out how to measure the angle. My u-joints are brand new and i know its the rear shaft giving me problems, since i drove it with out the rear shaft. Winter is coming up, and i will be needing 4-wheel to get around, if i install a t/c drop, will i throw off my front drive shaft angles? and to be clear, if i install the proper shims to make my rear angles equal, it should fix my vibes and save me from re-installing my u-joints every year? Thank you
As far as the rear shaft is concerned, you know for sure that there is nothing wrong with it correct? Just double checking. Also check to see if there is any play in the rear pinion as well. This will also give you vibration.
If you install a TC drop, it should actually help your front shaft angles. It depends on your control arm set up. You should figure out where you plan on going though as far as lift and if you're going to do an SYE before shimming because if you do the TC drop and later on do the SYE, you'll have to shim it again (or remove the shims you put in) Remember, with a TC drop you're changing the angle and height of the drivetrain only but the axles stay in the same position.
Stock drive shafts (no SYE)don't work the same as the double cardan shaft (w/SYE) so the pinion won't work at the same angle for both set ups. Stock shaft you'll be pointing the pinion back down. SYE with the double cardan shaft will have the pinion facing up towards the tail of the transfer case. Basically parellel with the U-joints.
Hope this helps.
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I plan on sticking with my 3-inch series II lift from rough country, which includes new control arms. I will try and use shims to make the rear shaft angles equal again, probably with an angle finder from harbor freight. There is nothing wrong with the rear shaft i believe. if this doesn't work ill have to use a t/c drop. thanks
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I plan on sticking with my 3-inch series II lift from rough country, which includes new control arms. I will try and use shims to make the rear shaft angles equal again, probably with an angle finder from harbor freight. There is nothing wrong with the rear shaft i believe. if this doesn't work ill have to use a t/c drop. thanks
That set up will work fine for you then. That's the exact set up I started with. 3 inch RC Series II and TC Drop. Never had vibes. It rode so nice too. Goodluck to you and keep us posted.
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