I'll tell them to shoot for that, assuming the front shaft is the source of the vibe. Thx
Chasing Front D/S Vibration Demons
- Thread starter JK_Dave
- Start date
I'll tell them to shoot for that, assuming the front shaft is the source of the vibe. Thx
New u-joint style double cardan shaft, too much positive caster and running a much higher gear ratio - it's a guarantee that it's your front shaft. That is of course, unless you are also running a new rear drive shaft without your pinion set but, I don't recall you saying anything about replacing your rear.
I just checked your profile and see that you have a front AND rear shaft. IF you still had vibrations after pulling off your front shaft, your rear must be off as well. IF you are sure that your pinion is set correctly, I would have it rebalanced as well.
Wizard
New member
Yeah I had both balanced Eddie, and also a uni in each replaced. Still got a very very fine vibration (which I'm putting down to pinion angle) but massive improvement on what it was like.
Hmmm, if that's the case and your rear shaft is for sure balanced well, could be you've got a lot of slop in your control arm bushings. If that is the case, I might purposefully set your pinion off a degree so that it sits inline when you are driving.
Wizard
New member
Appreciate all the advice and suggestions. Brilliant!
2007blackJk
Member
I thought it was not good to run a driveshaft u-joint at 0 degrees (inline with pinion) Something about the needle bearings and lubrication.
I see both recommended when setting rear pinion angle. Inline (0) and -2*. What is correct ?
I see both recommended when setting rear pinion angle. Inline (0) and -2*. What is correct ?
So run your driveshaft however you think is best.
You sound like the expert here, why not you tell me.
EDIT: :cheesy: I just remembered why your name rings a bell. Are things really so dead over on JKO that you have to spend so much of your time here now? I mean seriously, being that the information there is so much better, why do us all a favor and spend more of your time there.
http://wayalife.com/showthread.php?19704-2007blackJk-I-m-not-known-for-starting-shit-on-any-forum
2007blackJk
Member
Just asked a question Ed. I thought that JKO shit was behind us. I don't get involved anymore.
noroad
New member
its kinda like herpes once you got it is with ya for life.
:cheesy: And so did I, whatever your real name is. Being that you're the expert here, what is the correct way to run a rear drive shaft and why?
Sorry, I guess I missed the part where it was behind us. I mean, I see now that you had said something about it and asked to be banned from here but beyond that, I had totally forgotten who you were.
2007blackJk
Member
Ha!! That's fine. Have a safe and happy New Year guys. I'm out.
:cheesy: Will it be for good this time?
FWIW, you can blame all this on jkrossi. I had totally forgotten about both of you but he got me digging through some of the old hater threads.
noroad
New member
:cheesy: Will it be for good this time?
FWIW, you can blame all this on jkrossi. I had totally forgotten about both of you but he got me digging through some of the old hater threads.
You can only suppress the symptoms but like i said for life! lol
TheDuff
New member
:cheesy: Will it be for good this time?
FWIW, you can blame all this on jkrossi. I had totally forgotten about both of you but he got me digging through some of the old hater threads.
They seem to always come in pairs now...
jims68
New member
Here is my experience and heed my words! If you want pain and sorrow follow my experience. If you want a more pleasurable experience follow what Eddie has said over and over again and again in many a thread and write up. I have slightly different angles and lengths of drive shafts because of the V8 conversion. Tom Woods front and rear also went from 5.13's to 4.10's but probably should have only gone back to 4.88's. Same issues and after getting rear happy, just a small vibe to fix from rear, went to front. The front was WAY out of balance but this just narrowed the RPM spectrum of the vibe. Started at 4.5 degrees and worked my way down one turn on lower arms at a time to just above zero on caster. Now what? Bump steer is terrible! So I turned the C's, gusseted the C's and trussed the axle. Now if I would have listened and saved for the Pro Rock I wouldn't have a 30, wouldn't have wasted all the time modifying it and wasted money on parts I can barely recoup cents on the dollar for! You know the saying real world higher education is expensive and yes it is! Point being every change you make causes 2 more problems which lead to 4 to 8 on and on so you need to stop the cycle before this happens. Knowing what I know now I would have gone the different axle route and probably a different aftermarket DS. Its great you guys are asking questions its the listening I have found personally, myself, that can be lacking. Food for thought I guess! Good Luck!
P.S. Some may be wondering if all this worked out? Yes it did but two wrongs don't make a right!
P.S. Some may be wondering if all this worked out? Yes it did but two wrongs don't make a right!
Sucks that you had to find out the hard way but at least now, you have first hand experience.