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On 6/2/2005 18:55, Dan Kramarsky wrote:
| DML:
| sorry, the first message was a dud. here's the real one:
|
| I have the Dak Club Cab with the 2-piece drive shaft. a 46RH at one
end, and a stock
| 3.55 rear gear at the other. NO MODS TO SUSPENSION. its stock
height. and stock
| wheels/tires.
|
| Ever since my 46RH tranny was replaced i get a vibration at 70 to 90
MPH. the vibration
| matches wheel speed. i can feel it when i put my hand on the cab
floor near the "hump"
| or drive shaft tunnel. and i can also hear it faintly. put truck in
neutral while at
| highway speed and the vibration is still there. as truck slows down,
the tone of the
| vibration gets lower and lower. ( its like a faint drone sound )
|
| other work done at the same time as tranny was the u-joints. all of them.
|
| i took the truck back to the shop and the checked driveshaft angles.
they found that the
| driveshaft angles were about 3 degrees off and they corrected it by
inserting some
| spacers between tranny mount and frame. now the drive shaft angles
are within 1 degree
| of perfect. they also looked for any weights on the driveshafts that
may have gotten
| lost. they are all there. looked for dents. no dents in shaft.
|
| but the vibration is still there. so, what can it be? rear gear
backlash -or- that
| drive shaft center support bearing?
|
| when you push up and down on the driveshaft near the center support
bearing should it be
| able to move? or should it be pretty well fixed in one location
within the bearing?
|
| p.s. the driveshafts, rear gear and axles are all original from
manufacturer.
What about U-joints? What kind of shape are they in?
If you maintain speed and turn off overdrive, does the vibration change
at all? That'll at least eliminate the transmission.
- --
- -andy
http://home.rochester.rr.com/alevy/dakota - andy-dml@levyclan.us
- --------------------------------------------
"Whatever Adam does, do the opposite and you'll be fine"
-Bob Tom
- --------------------------------------------
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This archive was generated by hypermail 2b29 : Fri Jul 01 2005 - 09:48:05 EDT