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post #1 of (permalink) Old 02-12-2001, 02:43 PM Thread Starter
 
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Baaad Vibrations

I just finished putting a 4 inch suspension lift, a T-19 tranny and a 1 inch body lift in order to lift the tranny off the ground for clearance. I built my own crossmember in order to get the tranny snuggled up to the body. Oh...this is on a 74 cj-5. After getting all of this done, I hop in and when I got going about 20 mph I thought my teeth were going to rattle out. I assume it is the angle of my rear drive line. I called a mechanic to get some prices on CV joints or even finding a donor with a CV and he said since the drive line is "in line" I could not use a CV joint. Is what he is saying true and if so how do I and what do I do to correct the vibration problem?

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post #2 of (permalink) Old 02-12-2001, 03:04 PM
 
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Re: Baaad Vibrations

You're right, most likely your driveline angles are off now. A url to help you understand pinion angles in relation to the transfer case:
http://www.outdoorwire.com/4x4/tech/pinionangle/

this was also discussed in great detail a week or so ago; try searching the forum.

Max

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post #3 of (permalink) Old 02-12-2001, 03:25 PM Thread Starter
 
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Re: Baaad Vibrations

That angle stuff blows my mind. I sat down with a guy who did it all the time and after 2 hours I think I was more confused than when I got there. That is why I was wanting to put on a CV. If my thinking is correct, angles are less important with a CV. I could be wrong and probably am, but wouldn't a CV be better here. My rear drive shaft is only about 16 inches long and is at a pretty good angle right now. HELP!!

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post #4 of (permalink) Old 02-12-2001, 04:11 PM
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Re: Baaad Vibrations

You really need to sit down and figure out what is wrong. It may be just as simple as needing to put some shims in the rear. Or could be in need of a CV shaft. No need of doing something you don't need though. You are on the right track though, one of the driveshaft angles is off.

Here is another link that may help, lots of tech stuff here:
http://www.4xshaft.com

That discussion that occured here was good as well, make sure to read it. Very informative.




Jason

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<font color=green>[]llll[] '90 YJ</font color=green>
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