97 Ford Ranger, weird drivetrain vibration
Posted March 17, 2008 - 09:16 AM
The truck is a 97 Ranger supercab, 4x4, 4.0L V6 with 5spd manual tranny.
120,000 miles. Stock except for a single piece driveshaft from a later model Ranger
What's happening is that the truck makes a rumbling noise/vibration at speed, but only under power. If I take my foot of the gas it goes away. It is worse when the truck is cold and when driving at low RPMs. The truck still drives fine other than the vibration.
I've ruled out tires being out of balance because the noise isn't consistent with speed, The U joints feel fine, and I don't think it is wheel bearings because the noise isn't consistent with speed.
Anyone have any thoughts?
Thanks in advance
Posted March 17, 2008 - 11:27 AM
pinion angle with the new driveshaft
I would look real close at the orientation of the new shaft. If backwards on some Toyota's, this will happen.
Posted March 17, 2008 - 01:59 PM
also, i know on my shaft that the driveshaft and pinion flange are marked from the factory so when it is removed and re installed that you can line up the marks so that it is in the same postion. if it is off, this may be causing an issue for you. do you have a mark anywhere on your pinion flange?
Posted March 17, 2008 - 02:13 PM
Posted March 17, 2008 - 02:18 PM
Posted March 17, 2008 - 02:49 PM
Posted March 17, 2008 - 06:13 PM
I dropped the rear driveshaft and the U joints feel fine, but the slip yoke has a very small amount of play in it. I drove it around in 4wd (it does NOT like driving fwd only), and the vibration seemed to go away. I think the slip yoke is the problem.
Replacing it tommorow
Posted March 18, 2008 - 07:06 PM
Posted March 19, 2008 - 05:34 AM
edit: rephrase, most of the time it is do to saggy springs, or when someone has beat on it a bit, and leaf wrap occurs
Posted March 19, 2008 - 02:13 PM
Posted March 20, 2008 - 05:03 AM
thats how gm "fixes" thier issue with slip yoke vibrations on thier 1/2 tons (which comes back after a few thousand miles), Hopefully your issue was just with the "U" joints
Greased up Slip yoke and replaced U joints, vibration is gone:ride:
Posted March 21, 2008 - 08:43 PM