Ok here it goes sit back and enjoy. Laugh if you want but just please give me some advice.
First off I have a 1994 Supercab Flareside F-150 (2wd). I lowered the rear of the truck four inches with DJM lowering shackles and spring hangers. I also installed new shocks. The original two-piece shaft was in bad shape due to previous owner abuse so I removed it and the carrier bearing and had a new one-piece shaft made. THEN THE FUN BEGAN!!! I have a vibration that is not at a specific speed but moving from one speed to another. I have checked the pinion angle and shim back to as close to stock as possible. I have rebuilt the rear-end with all new bearings, seals and gears due to chipped ring and pinion. I replaced the trans tailhousing due to partially worn out bushing. I have replaced to drop shocks and checked balance of my tires. For the time being I unhooked the rear sway bar because the endlinks where now too long. Please help with any information you could. I am at a dead end.

Thanks Chad.

 

Pull the driveshaft and go get it rebalanced.

 

I will let yall know how the driveshaft thing does in alittle bit. I am headed to the Fabrication Shop now so they can take a look at it.

 

Well I took the drive shaft back to the Fab shop. They looked at it and decided something was wrong but couldn't tell exactly what so they made another whole new shaft. I cam home and put it in. And there it was. THE VIBRATION was still there. I pulled the tranny out of the truck tonight and the flywheel has a small bow in it. Not sure how or why but going to put a new one in it tomorrow night. While I am in there I am going to put a new torque converter in also. I ordered new components to reinstall the original two piece drive shaft and I am planning on installing that on Friday or Saturday so I will again let yall know how it goes in a few days.

Thanks,
Chad

 

Well just wanted to let everyone know that I finally got rid of the vibration. I went to the local salvage yard and got lucky. I purchased a used driveshaft that was actually just like new. It came out of a wrecked truck that the guy that owned it just replaced the driveshaft about 6 months before wrecking it. Anyways with the new driveshaft, a carrier bearing bracket and 3 degree shims. BYE BYE VIBRATION. Well talk to yall later.