rear end vibration 97 f350
Hey guys if you go through my old threads you'll see that my old driveshaft blew on the freeway and took my trans along with it. I put a new trans, new 1 piece rear driveshaft, and new driver side rear axle shaft and hub bearings in in the past month.
As soon as I got the truck running again I started feeling a gnarly vibration in the shifter and in the seat at 55 mph, and 65 mph. At 70 mph i could no longer feel the vibration in the seat but no matter what the shifter vibrated violently. Beyond that, it doesn't vibrate on acceleration or deceleration or in neutral, it just vibrates at 55+ no matter what I do.
I learned that my driver side axle was bent a few weeks ago and finally got around to replacing it a few days ago hoping that would solve the issue. Well, it didn't. I jacked up the rear end and could clearly see that at 55 mph the driveshaft was vibrating.
My suspicion is that something besides the driveshaft is messed up, because how could a brand new driveshaft be off balance right? Either way I'm gonna take my driveshaft down to a driveline shop on Friday and have them figure out if it's off balance or not.
My question for you guys is what do I do if it isn't the driveshaft? Could it possibly be transfer case related? Could it possibly be differential related? I just don't know where to go from here if my driveshaft comes back clean.
97 4x4 F350 XLT OBS Powerstroke CCSB- ZF-5 manual trans, 6637 cold air intake, TS6 chip, straight piped 4 inch turboback pretire side exit, 4 pillar gauge w/ diff temp, EGT, boost, and HPOP pressure, ATS diff cover, dual alpine 10'' subs w/ alpine component speakers, B code rear springs