| Author |
|
72badcat
Newbie
Joined: Apr 24 2011
Online Status: Offline
Posts: 1
Member's Gallery:
View Gallery
Location:
U.S. - Virginia
|
| Posted: Apr 24 2011 at 4:21pm | IP Logged
|
|
|
Hey all: My 97 Hardbody 4x4 vibrates between 2100-2600 rpm, most noticable at 35-45mph. Shakes the truck noticablely. Vacant passenger seat headrest moves back and forth about 1/2 inch. Had tires rebalanced and swapped around at shop 3 times. Also checked for roundness and tires OK. Driveline is 2 piece and longer shaft was rebalanced. Mechanic said carrier bearing is OK. Truck has 110,000 on it. 4 cyl, that runs smooth and great. Vibration less when clutch pushed in, less when under hard acceleration or deacceleration. Seems to be the worst with just lightly pushing the gas. Higher RPMs reduces problem but still there.
Have read a whole bunch of posts here and at other forums. My chief suspect is a harmonic balancer (not too costly) or a out of balance flywheel (big $$). One other thing posted is an out of alignment short driveshaft because of the carrier bearing. Seems to be 1/4 inch of movement in carrier bearing.
Any other ideas or tools for diagnosing. Local Big O did the tire balancing but are at the end of their knowledge. Have to solve it myself or go to another shop.
Help much appreciated.
__________________
Too many trucks, not enough staturdays
|
| Back to Top |
|
| |
frontierguy
Senior Member
Master Mechanic
Joined: May 20 2008
Online Status: Offline
Posts: 2591
Member's Gallery:
View Gallery
Location:
U.S. - Pennsylvania
|
| Posted: Apr 25 2011 at 8:46pm | IP Logged
|
|
|
The u-joints in the rear shaft have to be in the same
"plane", meaning the cross joints have to be parallel to
each other(no twist). I don't know how else to explain it.
__________________
'10 Altima SL
Traded 08 Frontier for 16 Frontier SV CC Long box, quite an upgrade. I do miss the 6 speed and Dynomax ex.
Nissan Technician 25 + years
2011 John Deere X720SE
|
| Back to Top |
|
| |
kbwhipple
Newbie
Joined: Jan 17 2011
Online Status: Offline
Posts: 12
Member's Gallery:
View Gallery
|
| Posted: Apr 25 2011 at 9:16pm | IP Logged
|
|
|
i dont know if this matters or not but i used to have an old square body truck. (isuzu to be exact) but besides that... it had a two peice drive shaft too and since the carrier bearring is not and exact fitting bearring, no ball bearrings and such there is a tendancy for it to have some "play" i wouldnt worry about the 1/4". mine had probably 1\2" lol it didnt vibrate at any speed or what not.. i know if the drive shaft isnt balanced that could cause lots of problems but who on earth would install a unbalanced drive shaft is beyond me..
|
| Back to Top |
|
| |
Active Topics 
Memberlist 
Search 
Help 
Register 
Login
Nissan Frontier Forums : HardBody (The Frontier Predecessor)
Topic: Vibration at 35mph with details
