DriveLine Left The Scene!!

[StrokedInMT]

ok, this is gonna be long,,,

Situation/what happened: traveling with cruise control set at about 73mph, empty i heard a terrible noise start. i had enough time to turn radio down to determine the issue when all of a sudden a loud bang and i was powerless. pulling over and observed NO driveline anywhere to be found.(had to walk back about 100yrd and out in farm field to retrieve)

Lead Up: after installing a 4" four-link BDS suspension lift in the front and 2" taller blocks in the rear and about 3/8"(per instructions) spacer in the carrier bearing i had a slight vibration/shimmy under Moderate to Heavy acceleration. (also running 35"tires MT tires)

Followup: Battling with Ford we agreed to split the bill 50/50 since i had barely 5,000 miles since mod and only 30,000 on truck total. and it was a minor size lift. they had to replace the complete rear driveline and yoke. Now i do still have a slight vibration/shimmy under hard acceleration.

The BIG QUESTION: what is the cause of this?? about 1/2 people say its axle wrap, other 1/2 say it isn't.. pics to follow..

[StrokedInMT]

[StrokedInMT]

[Austin G]

I feel your pain...

[StrokedInMT]

ha, at least you saw the problem right away,, when its completely missing,, little harder to notice,,haha

maybe we need to start a support group,,,

[palady6.4]

Two piece drive shafts suck. I had the same problems tryed all kinds of stuff, bottom line lose the 2 piece and have a custom 1 piece no vibes pricless.

[StrokedInMT]

pursued that idea pretty hard also,, but everyone says thats too long for a one piece. so does it have that double u-joint thing at one end?
thanks

[palady6.4]

Your truck is the same as mine ccsb right? You should have no problem local shop did mine, just cut of the ends on my stock shaft welded them to a one piece shaft. High speed balanced done cost me like 300 bucks I think, best money spent. A lot of places I called told me the same thing it was to long, as long as its not a cclb that a different story. Not sure where you are but try any local big rig truck parts store that carry drive line parts etc. Thats who did mine.

[palady6.4]

Here few pics

[peteoreo]

try a 1 inch shim in carrier, I have 6 inch block in rear and 1 inch shim and no vib at all. Shaft is straight.