A little vibration - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep Wrangler Forums > YJ Wrangler Technical Forum > A little vibration

Smittybilt Products at Oconee Off-Road!Alloy USA Still AvailableCurrie Currectlync Steering Upgrade Kits and Currie Anti-R

Reply
Unread 01-21-2010, 02:03 PM   #1
H_Swank
Registered User
1991 YJ Wrangler 
 
Join Date: Dec 2009
Location: VA Beach
Posts: 364
A little vibration

Just got through building my rig. Its got the TJ 4.0L and the AX-15 married to the NP231.

I am getting some vibration, mainly while I am decelerating without pushing the clutch. When I hit the clutch its all quite. I am running Mercron IV ATF in the tranny and xfer case.

Any suggestions would be greatly appreciated.

H_Swank is offline   Reply With Quote
Unread 01-21-2010, 02:50 PM   #2
Mean Max
Don't poke the bear
 
Mean Max's Avatar
1991 YJ Wrangler 
 
Join Date: Jul 2007
Location: Stuart, Florida
Posts: 13,682
What did the AX-15 come out of?

Max
__________________
Click here to see all of my different albums on Photobucket.
Choose any album to see all of my pics!


Quote:
Originally Posted by UltimatE View Post
Max has a picture of every Jeep part ever made.
Quote:
Originally Posted by Benderff View Post
No one here knows what they are talking about. You should try Pirate 4x4 they will be happy to help you.

There is no situation that cannot be improved with a small but well-placed explosive.
Mean Max is offline   Reply With Quote
Unread 01-21-2010, 03:04 PM   #3
ritjobbie
Registered User
1995 YJ Wrangler 
 
Join Date: Jul 2007
Location: Rochester, NY
Posts: 1,283
ATF in a manual gearbox?

I'd check u-joints. Replace them all if it's never been done.
__________________
1995 YJ Rio Grande, 2.5L Low Output Engine
My Jeep Worklog
ritjobbie is offline   Reply With Quote
Unread 01-21-2010, 03:20 PM   #4
postaldave
Registered User
1996 XJ Cherokee 
 
Join Date: Dec 2009
Location: kentucky
Posts: 381
rear diff might be going out.
postaldave is offline   Reply With Quote
Unread 01-21-2010, 04:39 PM   #5
Mean Max
Don't poke the bear
 
Mean Max's Avatar
1991 YJ Wrangler 
 
Join Date: Jul 2007
Location: Stuart, Florida
Posts: 13,682
Quote:
Originally Posted by ritjobbie View Post
ATF in a manual gearbox?
Very common. Many manufacturers (Volvo for one) call out ATF for their manual gearboxes.

I'd check u-joints. Replace them all if it's never been done.
Good idea!

Max
__________________
Click here to see all of my different albums on Photobucket.
Choose any album to see all of my pics!


Quote:
Originally Posted by UltimatE View Post
Max has a picture of every Jeep part ever made.
Quote:
Originally Posted by Benderff View Post
No one here knows what they are talking about. You should try Pirate 4x4 they will be happy to help you.

There is no situation that cannot be improved with a small but well-placed explosive.
Mean Max is offline   Reply With Quote
Unread 01-21-2010, 05:39 PM   #6
mrmud4x4
Registered User
1988 YJ Wrangler 
 
Join Date: Nov 2008
Location: Rocky Mount, NC
Posts: 350
Quote:
Originally Posted by 01Extreme69 View Post
Just got through building my rig. Its got the TJ 4.0L and the AX-15 married to the NP231.

I am getting some vibration, mainly while I am decelerating without pushing the clutch. When I hit the clutch its all quite. I am running Mercron IV ATF in the tranny and xfer case.

Any suggestions would be greatly appreciated.
Make sure your tranny mount bolts are tight.(on the skid plate) When you decel...tranny may be lifting a little, or rotating.
__________________
This forum requires that you wait 60 seconds between searches. Please try again in 1 seconds.
mrmud4x4 is offline   Reply With Quote
Unread 01-21-2010, 05:40 PM   #7
TheDuke17
Registered User
1994 YJ Wrangler 
 
Join Date: Jan 2009
Location: Washington St.
Posts: 29
Mine did the same thing a few months before the rear carrier bearing went out.
__________________
[FONT="Book Antiqua"][SIZE="5"][/SIZE][/FONT][FONT="Impact"]It should be painfull to be STUPID!![/FONT]
TheDuke17 is offline   Reply With Quote
Unread 01-21-2010, 07:32 PM   #8
H_Swank
Registered User
1991 YJ Wrangler 
 
Join Date: Dec 2009
Location: VA Beach
Posts: 364
AX-15 is out of a 97 TJ along with the motor. I wasnt sure what the tranny called for, a friend said he ran ATF in his. Plus the seal on the xfer case input if gone, so I figured I would run the same fluid in both.

It dont sound like ujoints, but I guess anything is possible. I will check the tanny mount since I had to fab something up cause the skid plate was for a BA10.
Any suggestions as far as upgraded ujoints?
H_Swank is offline   Reply With Quote
Unread 01-21-2010, 07:45 PM   #9
MJMPC
Registered User
1991 YJ Wrangler 
 
Join Date: Nov 2008
Location: Elizabethtown, Ky.
Posts: 3,070
I dont think I would run ATF in a man trans .
__________________
MIKE

http://www.dav.org/

MJM Powder Coating
Elizabethtown Ky.

http://www.cityprofile.com/
MJMPC is offline   Reply With Quote
Unread 01-21-2010, 07:46 PM   #10
mrmud4x4
Registered User
1988 YJ Wrangler 
 
Join Date: Nov 2008
Location: Rocky Mount, NC
Posts: 350
I would get a seal in there and drain that ATF out, put in a good synthetic oil or penzoil synchromesh.

jus curious - How does it shift?
__________________
This forum requires that you wait 60 seconds between searches. Please try again in 1 seconds.
mrmud4x4 is offline   Reply With Quote
Unread 01-21-2010, 07:52 PM   #11
4.7stroker
Registered User
1988 YJ Wrangler 
 
Join Date: Apr 2007
Location: Rio Rancho NM
Posts: 4,299
There is nothing wrong with ATF in manual trannies. My Mustang T45 has been using ATF for 14 years and my Jeep AX15 has been using ATF for 2 years and both shift just like new.
I would check mounts, all driveline u-joints and pinion angle, I would also check for slop in the bearings of the xfer case and diff.

Dwayne
4.7stroker is offline   Reply With Quote
Unread 01-21-2010, 08:04 PM   #12
H_Swank
Registered User
1991 YJ Wrangler 
 
Join Date: Dec 2009
Location: VA Beach
Posts: 364
It shifts ok. I think it should be better. A little grind going into reverse, but nothing major. I am going to replace the ATF with Sythetic 10W-30. What should I run in the xfer case?

I havent messed with U joints in forever. How can I check them to see if they are the problem?
H_Swank is offline   Reply With Quote
Unread 01-21-2010, 08:23 PM   #13
mrmud4x4
Registered User
1988 YJ Wrangler 
 
Join Date: Nov 2008
Location: Rocky Mount, NC
Posts: 350
Quote:
Originally Posted by 01Extreme69 View Post
It shifts ok. I think it should be better. A little grind going into reverse, but nothing major. I am going to replace the ATF with Sythetic 10W-30. What should I run in the xfer case?

I havent messed with U joints in forever. How can I check them to see if they are the problem?
The driveshaft ujoints are actually shaped like a cross, they connect the U of the driveshaft with the U of the yoke.

Turn your driveshaft by hand while you hold the yoke steady, see if there is play, any popping/clicking while you rotate shaft back and forth.(jus leave it in gear and on the ground) Also visually look at the "cap" of the ujoint and the cap straps and bolts that hold the straps in place. (small bolts) If the bearings under the cap are worn, there will be play there or a visible gap. The bearings may actually fall out between the cap and ujoint end. There are four bearing caps on each ujoint. At the rearend yoke, two should be strapped/bolted, and two should be held in place at the ends with C-clips.

You'll see, real easy check
__________________
This forum requires that you wait 60 seconds between searches. Please try again in 1 seconds.
mrmud4x4 is offline   Reply With Quote
Unread 01-21-2010, 08:23 PM   #14
4.7stroker
Registered User
1988 YJ Wrangler 
 
Join Date: Apr 2007
Location: Rio Rancho NM
Posts: 4,299
Just grab and wiggle, there should be no slop in the joint. The xfer case should be ATF. I have Mobile1 in mine.

Dwayne
4.7stroker is offline   Reply With Quote
Unread 01-21-2010, 08:42 PM   #15
gearhead1985
Registered User
1992 YJ Wrangler 
 
Join Date: Mar 2009
Location: quincy il
Posts: 281
get the autozone gold for the life time warranty they are decent just make sure to keep them greased

with your vibrations since you used atf not an oil you might of ate up a bearing my input bearing went out and cased the same symptoms
__________________
i want to put a pic here but the computer won't let me so here is the link
[url]http://i641.photobucket.com/albums/u...85/dnsjeep.jpg[/url]
gearhead1985 is offline   Reply With Quote
Reply
Thread Tools


Suggested Threads





Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.