tbrand Posted April 10, 2011 Posted April 10, 2011 I've been getting some vibration lately, both around 35-45 mph in 3rd or 4th, and 65+ mph in 5th. It only happens under load, in gear. Let off the gas, the vibration vanishes. Put it in neutral or clutch in, and I can rev without it vibrating at any vehicle speed. Transmission mount? :???:
Comancheman824 Posted April 10, 2011 Posted April 10, 2011 Hmmm have you checked all your u-joints in the drive shaft or tour double carden joint? I had a similar problem and it ended up being my double carden joint on my drive shaft :???:
mj Mike Posted April 10, 2011 Posted April 10, 2011 :agree: check U joints, :smart: Also check Transmission mount & motor mounts, make shire all the rubber of the mounts look good, no cracks or splits they are not that hard to swap out. support the trans W a floor jack & block of wood, then remove the cross member & Swap out the mount, same process for motor mounts
Cajun Posted April 12, 2011 Posted April 12, 2011 Don't forget to check play on your (two piece) front driveshaft too....
mj Mike Posted April 13, 2011 Posted April 13, 2011 Don't forget to check play on your (two piece) front driveshaft too.... tbrand _________________ 1989 Comanche. 4.0/PukeGoat/2wd. Just a daily driver.
tbrand Posted May 12, 2011 Author Posted May 12, 2011 Ok, so I've finally had a chance to track down some possibilities. The u-joint where the driveshaft connects to the rear axle has more play in it than I suspect it should. Time to go get a new one - what are the idiot mistakes to avoid when changing the u-joint? Should I be doing the U-joint at the tranny as well? It didn't seem like it had play, but why not change it while the shaft is out, right? Speaking of that... tips on pulling the shaft? It all seems reasonably self-explanatory, but as I'm now in an apartment parking lot, instead of my carport at my old house, I'd like to be able to pull it apart and have it buttoned back up in one day.
tbrand Posted May 31, 2011 Author Posted May 31, 2011 Y'all were right. The rear driveshaft/axle u-joint was toast. Popped a new one in there, and boom! No more clunking from the rear end.
mj Mike Posted June 1, 2011 Posted June 1, 2011 good to hear :thumbsup: when u joints go bad there like a ticking time bomb! & when they go they usually mess up the drive shaft also.
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