Anybody have 2wd crew cab with one peace drive shaft that viberates like hell around 90-105 but stop past a 105 and viberates on hard accel

 

get that puppy checked for balancing. Tube likely to be bent. It won't look bent by eyballing it, but .040" is a lot at 90+mph. I know this first-hand.

On second thought... have you changed the stance on the truck. I just noticed your avatar. Looks like it's lowered. Nice BTW! Check the pinion angle. May be more than recommended 1 - 3 degrees.

 

don't go that fast with it. it will eventually fly out and destroy stuff. a one piece shaft is too long for the wheelbase. the ONLY SAFE fix for it is a 2 piece conversion.

 

Do go into more detail on this 2 pc setup, you runnin it?

 

It is your driveshaft and it will fly off sooner or later. You need a 2pc from an extended cab, fits like a glove, just need to build a crossmember for it.

 

+ for the 2pc DS

 

The shop that built my 1pc for my RCSB mentioned that they gets all kind of folks trying to run a 1pc on ECSBs. They recommend 2pc shafts w/ crossmember for support. The longer the driveshaft, the more potential for throw-out.

 

So i talked to a guy today at the used parts place, he's got what i need but swears it wont work, (he is a expert you know) ha, anyway has anyone actually done this swap? If so what year did you get your parts from?

 

It does work. There's several friends of mine here running them already. They have used 2pc d/s from a 99-02's. Need to make a support (crossmember). All four wheels need to be on the floor not on jackstands cause you need to get the proper pinion angle and the support needs to be a certain hight.
My cousin just got it done on his NNBS 07 and no vibrations at all.

 

should i be fine with a one-piece driveshaft on a 04 RCSB?