Shaking between 25-35 (2000, 6cyl. Sahara) - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > TJ Jeep Wrangler Forum > TJ General Discussion Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 04-16-2011, 01:52 PM   #1
Newb
 
Join Date: Jan 2009
Posts: 11
Shaking between 25-35 (2000, 6cyl. Sahara)

Jeep: 2000, Sahara, MT, 70k hard miles.

Issue: My Wrangler has been shaking from about 25-35 miles an hour and it's making noise as soon as I start moving. The shaking goes away if I put it in neutral.

Background Info: Clutch replaced two weeks ago; I went on a 1,600 mile trip and the day after I got back it starting making an odd clanking noise and lightly shaking at about 30 mph. Within about 4 miles it was shaking violently at any speed. I took it to AAMCO and they said that I needed to have the tranny rebuilt (it was rebuilt 12 months ago). I got a second opinion and by the time the guy came to pick it up it wasn't doing anything wrong. He checked the fluid and the transfer case was almost empty. He gave it back and aside from some minor noises it drove fine for about a day or two. Now, it shakes pretty bad from 25-35mph but the shaking goes away if I put it in neutral.

Other considerations: It has a 3 inch lift on it so there is a good angle between the transfer case and rear diff. Also, I'm pretty sure it's possessed by the devil.

Something to laugh at: Last year the rear differential and rear right axle ripped off at about 50mph, nearly killing me. This Jeep hates me.

WilmingtonJeep is offline   Quote Quick Reply
Old 04-16-2011, 02:00 PM   #2
Jeeper
 
perkalator's Avatar
 
Join Date: Jan 2011
Location: kennewick
Posts: 157
I had vibrations at the same speed with a 2" budget boost lift. Once I installed a lift with adjustable upper and lower control arms and installed a cv driveshaft the problem was gone. I had to pitch the rear pinion angle up quit a bit. I would check out your rear drive line u-joints, transfer case output shaft, and your pinion yoke shaft for play.

__________________
2' budget boost wanting to grow up
4" on 33 x12.50
perkalator is offline   Quote Quick Reply
Old 04-16-2011, 02:08 PM   #3
Knows a couple things...

WF Supporting Member
 
Jerry Bransford's Avatar
 
Join Date: Nov 2005
Location: Escondido, Calif.
Posts: 30,898
Images: 2
First, NEVER go to AAMCO to have something diagnosed that you don't have a clue what it is. OF COURSE they're going to say the transmission needs an overhaul, that's what they do and they're there to take your $$$.

Since you have a 3" suspension lift and you have not mentioned that you did anything to get rid of the usual vibrations a 3" suspension lift causes, I would suspect your driveshaft angle where it connects to the transfer case and axle is excessive from the lift. I'd first try dropping the transfer case skidplate 1" with either washers stacked over 1" longer bolts, or buy a transfer case lowering kit. That will reduce the angles I'm referring to which may (!) take care of your vibrations. If it helps but doesn't entirely cure the vibrations, we're at least on the right track and there is a bit more we can do after that.
__________________
When you have a choice, buy American.

Jerry Bransford is online now   Quote Quick Reply
Old 04-16-2011, 02:42 PM   #4
Newb
 
Join Date: Jan 2009
Posts: 11
Lift installed over 3 years ago

Thanks for the advice. I should have mentioned that the lift has been on for the past 3+ years and I'm just now running into issues. Do you still think it's the lift? Also, do you recommend any specific T-Case lowering kits?
WilmingtonJeep is offline   Quote Quick Reply
Old 04-16-2011, 02:46 PM   #5
Knows a couple things...

WF Supporting Member
 
Jerry Bransford's Avatar
 
Join Date: Nov 2005
Location: Escondido, Calif.
Posts: 30,898
Images: 2
You may have had vibrations you just didn't pay attention to before so if that's the case, you might have a bad rear driveshaft u-joint or two. But without actually being able to feel the vibes, it's hard to make an armchair diagnoses.

So you've had a 3" suspension lift for 3+ years and never did anything like a t-case drop or anything else to counteract the steepened driveshaft/u-joint angles? I don't know how you could have had 3" of suspension lift without having had vibrations before this point. Or did it have less serious vibrations before now?
__________________
When you have a choice, buy American.

Jerry Bransford is online now   Quote Quick Reply
Old 04-16-2011, 03:12 PM   #6
Newb
 
Join Date: Jan 2009
Posts: 11
No, never any vibrations before now. It's actually a 2.5 inch susp. and 1 inch body lift. It came with the lift and I haven't messed with it. I had a similar thought on the u-joints, but the vibration goes away in neutral and the u-joint is still spinning? Plus, this happened in basically a day (not a slow buildup of vibration) and there doesn't seem to be any play in the u-joints. This is kind of an odd issue, but I'll probably try to tackle it as cheaply as possible at first (e.g., t-case lowering kit and new u-joints).
WilmingtonJeep is offline   Quote Quick Reply
Old 04-16-2011, 04:13 PM   #7
Knows a couple things...

WF Supporting Member
 
Jerry Bransford's Avatar
 
Join Date: Nov 2005
Location: Escondido, Calif.
Posts: 30,898
Images: 2
A u-joint can suddenly go bad, I'd at least check the two out on your driveshaft. Even one of the front u-joints might be bad since that driveshaft spins all the time even in 2wd.

That the vibration goes away when you shift into neutral isn't really proof it's not a u-joint since the load is removed from them when coasting in neutral. I'm not guaranteeing it's a bad u-joint but it's worth a look.
__________________
When you have a choice, buy American.

Jerry Bransford is online now   Quote Quick Reply
Old 04-16-2011, 04:19 PM   #8
Newb
 
Join Date: Jan 2009
Posts: 11
Thanks, I'll let you know how it turns out.
WilmingtonJeep is offline   Quote Quick Reply
Old 04-16-2011, 05:28 PM   #9
Newb
 
Join Date: Jan 2009
Posts: 11
Just checked the u-joint going into the rear diff. and it's definitely shot...
WilmingtonJeep is offline   Quote Quick Reply
Old 04-16-2011, 05:32 PM   #10
Knows a couple things...

WF Supporting Member
 
Jerry Bransford's Avatar
 
Join Date: Nov 2005
Location: Escondido, Calif.
Posts: 30,898
Images: 2
Good find. A Spicer 5-785x u-joint would be a superb replacement u-joint choice. Get your rear pinion angles sorted out first though so it doesn't happen again.

__________________
When you have a choice, buy American.

Jerry Bransford is online now   Quote Quick Reply
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Jeep Wrangler Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
6 cyl 2000 Jeep Sahara oil pressure and stall issues VNO TJ Tech Forum 4 11-16-2013 04:22 PM
Cylinder 1 Misfire on 1999 6cyl Sahara JDaviesspy TJ General Discussion Forum 3 12-11-2010 03:29 PM
New stock 2000 sahara tj questions? Shokker TJ Tech Forum 12 10-29-2010 11:45 AM
"New" 2000 TJ Sahara Manual zznalg TJ General Discussion Forum 12 11-26-2008 06:24 PM
Tan TJ Hard Top Wanted For 2000 Sahara Rickster49426 Classifieds Archive 0 03-19-2008 08:32 AM


logo carid shop wrangler parts carid fender flares custom wheels store avs deflectors at carid
» Rates
Get low rates on auto insurance in Canada!

» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 02:23 PM.



Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC