Re: [MV] Prop Shaft

From: Recovry4x4@aol.com
Date: Thu Jun 13 2002 - 23:24:12 PDT


Here are some considerations with the prop shaft and with the towbar
operations. The reason the front wheels turned was because of the sprag unit
(overrunning clutch) in the transfer case. Pulling the drive shaft was a good
idea as would have been pulling the rear axle shafts. Its easy to unbolt the
shaft from the rear axle and slide it out of the slip yoke but more problems/
work arise from this. My suggestion would be to remove the 4 bolts and take
the slip yoke off the transfer case and reassemble the shaft on the ground.
As Joe Shannon pointed out, you need to unscrew the seal collar off of the
slip yoke and reinstall it on the stub yoke (driveshaft.) Keep in mind that
these 2 pieces have to be assembled in phase. This means that the ujoints
have to be in the exact same direction front and back of the shaft. Harmonic
vibrations will surface if the ujoints aren't phased. As far as the flat
towing with a towbar, just remember, you can do it as long as there are no
driveline deficiencies. For those flat towing a unit with the sprag, be
absolutely sure to cycle your transmission through first gear before going to
neutral. If you were to just pull it out of reverse into neutral, the sprag
action wouldn't reverse and you would be faced with major drive line windup.
If you are going to use a second driver and back a vehicle with a towbar, you
would need to cycle the trans from reverse to neutral before backing to avoid
windup. If you have a sprag unit spend time to understand how it works and
you will be much happier feel much smarter when the next guy starts cussing
at his because of his own operator error.

Kenneth Engle
Loxahatchee, FL U.S.A.
AM General M-35A2
Fruehauf M105A1
MVPA #24371
http://hometown.aol.com/recovry4x4/myhomepage/photo.html



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