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i've had this shaking, wobble feeling when i travel around
40-45 mostly and when braking down to the same speed,
for quite a while been trying to eliminate things front end is tight,
aligned and put new shocks on.
check rotors for run out. no lost weights on drive
shaft, but i did notice that the yoke moves some when i grab
the drive shaft and move it back and forth. there is no fluid leaking at the seal. i checked my explorer and the yoke on it is tight. is there any play suppose to be there or might this be where i am getting some of the shake-wobble feeling. this feels like its the whole truck not the steering wheel shake. sorry so long. thanks
racerguy,
yeah, where the yoke goes in the transfer case.
and yes i did have the tires balanced , i even replaced the
old tires with new ones and they were balanced too.
i tried braking with the emergency brake yesterday to
see if would shake and i did not so i think this should tell
me that it is something in the front end. but things seem
tight, unless me and the mechanic who inspected my truck
thursday are missing something. i've been fighting this for over a year now. thanks
Usually a driveshaft, or driveline related problem will show up as a higher frequency vibration, not a slower shake or wobble or shimmy. A shake or wobble or shimmy is usually tire related.
Of course there are exceptions to every rule. I've seen a seized U-joint act just like a tire that wasnt round when slowing the truck down.
Does your truck have rear discs or drums?
I have rear drums.
i spoke to soon about the emergency brake test,
i did that again today and this time i still felt the shake.
i spun the rear wheels by hand and did not hear bearings making
any noise. i have'nt changed the back shocks yet so i think
that i will try that next. they are still the stock ones. or maybe
i should try having the drums and rotors turned?
Rear driveshaft play on a rear wheel drive vehicle is not normal. How much play are we talking about? I have an old jeep that is missing a few pinion bearing shims and there is a little play, but that doesnt really worry me. You might pull your diff cover and drop the pinion end of the shaft and jack up the vehicle. Turn the gears by hand and see if you see anything abnormal. Inspect the gears carefully for any pits and the fluid for any excessive metal shavings.
If there was any abnormal pinion movement, you'd get a leak forming from a worn pinion seal. It really sounds to me like you might have a warped rotor or an out of round tire.
Thanks for your help racerguy,
i think your right to have the drums turned first to try.
i did check the i.d. and there should be enough material to machine out and still be smaller than the max dia. allowed.
I'd check your u-joints, from what you've said, I'd say the ujoint at the diff is bad.
I had exactly the same thing happen on my rig while on a trip this past weekend, I manged to get to my destination. When I got there, thank goodness there was a Napa, and my father in law had access to a large vise.
The needle bearings in 2 of the cups on my bottom ujoint were nothing but powder, so while I had the drive shaft off I replaced both u-joints with some Napa U-joints with grease zerks for a grand total of 20 bucks.
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