My 1998 12 valve diesel has 191,000 miles on it. I developed a vibration in
the ride that persists from around 40 to 75 MPH. I needed new tires so I
purchased a set of LT/MS Michelins. I also had the ball joints replaced and
the shocks are less than 6 months old. The vibration is still there. I pull
a big fifth wheel with this truck. The steering seems a little loose. Anyone
have any ideas or experience with this problem? Thanks in advance.
Yes and if it is a 4x4 check all the the joints on the front axle too
because they always turn and do not forget the inner spindle bearings
as well as they can cause a vibration as well when they are dry (the
front axle shafts on a 4x4 dodge always turn) LAso on the steering
looseness, check front axle pivot studs because on a 4x4 the weight of
the deisel is hard on them and Dodge upgraded the axle because of this
Posted using the http://www.autoforumz.com interface, at author's request
Articles individually checked for conformance to usenet standards
The steering looseness could be the steering box. I had to replace the ball
joints on my 1996 2500 at 141,000 miles. Went down to have a front end
alignment and the service guy showed me that pitman arm on the steering box
had a lot of slop in it. Couldn't align it until I replaced the steering
gear box. Ordered a new PSC gearbox (they have an outstanding reputation).
Before the new gear arrived I sold the truck......Couldn't turn down the new
employee pricing. So now have a new PSC steering box (couldn't return it)
Thanks for the help and here's an update with clarification. It is a 2WD
model. The shocks were less than 3 months old. I got the tires in early July
at Discount Tire. They've been really good about trying to balance them, but
the vibration remained even after 2 road force balancings. I took it to a
drive train specialist who test drive it and decided a wheel was out of
balance. He told me to bring it in the next day and he'd check it out. I
drove back to Discount Tire to talk with the manager one more time. I
decided I wanted custom wheels and I thought it might help. I bought them
and Discount tire mounted them and performed the road force balancing again.
The shake remained. I have had the ball joints replaced and the front end
I took it back to the drive train specialist who checked the axles and drive
shaft. He said the u-joints were too tight and he adjusted them. He also
balanced the drive shaft. Then, he replaced the transmission mounts. The
vibration is still there. He suggested it might be the torque converter or
fan clutch. He suggested I take it to a diesel engine specialist here in
Vegas, which I've been trying to do for a week and a half. He's really busy,
but may get to it Sunday. The vibration is barely noticeable until I get up
to about 20 mph and gets progressively worse up to 70 mph. It's tolerable at
The engine feels OK. There may be a little shimmy at about 2,000 rpm. The
good thing about all this is the preventive maintenance that's been
performed. Those u-joints were original equipment at 191K. Any ideas?
Thanks in advance,
Adjustable u joints?
This is just a thought that has worked on newer trucks.
Loosen the tranmission mount bolts and the through bolt on the engine
mounts. Start the truck and drive it 100 feet at a very slow speed. Stop
gently and back up the same 100 feet, put the transmission in neutral, set
the parking brake and shut off the truck. Torque the bolts that you loosened
to factory spec's and see what happens.
I own an '04 3500 and have noticed multiple complaints among RAM owners
about drive shaft balence. I bought my truck new and the vibration could
just barely be detected, but as I used the truck, the vibretion has become
more pronounced. I am certain that my vibretion is shaft balence, but it
only occurs at very high speed. (I have 4.10s) So, I live with it.
Typically when a drive shaft is out of balance, it will make itself
known only at certain speeds if it is not too far out of balance. Most
drive shafts are not well balanced from the factory.
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.