From: Steve & Jeanne Keith (cckw@attbi.com)
Date: Thu Oct 24 2002 - 04:46:51 PDT
It was a noise that was different from the normal (many) ones that it makes.
I can't
really describe it other than to say it was different. I know that this is
not much help
but after a while (50,000+ miles in this truck) you get to know its sounds
and noises
pretty well.
Steve AKA Dr Deuce
----- Original Message -----
From: "Patrick Jankowiak" <eccm@swbell.net>
To: "Military Vehicles Mailing List" <mil-veh@mil-veh.org>
Sent: Thursday, October 24, 2002 1:38 AM
Subject: Re: [MV] CCKW Differential locks...also rear brake&axle O/H
> What does straining in the power train sound like? My M35 makes so many
kinds of noise..
>
> Steve & Jeanne Keith wrote:
> >
> > If you didn't jack up the other rear axle, you cannot rotate one rear
wheel
> > with only one
> > side of one axle jacked up. The back end on the CCKW, M5H6 and M35 et.
al.
> > are in
> > 8 wheel drive all the time in the rear. Jacking only one of the 4 rear
> > positions (wheels) will
> > NOT allow that position to turn because one position on the other rear
axle
> > has to turn the
> > same amount.
> >
> > This is why I tell people to put a matched set of tires on the rear and
> > LEAVE THEM ALONE!
> > The rears on my CCKW will last ~30,000 miles. The front ~4,000-5,000. If
I
> > rotate the fronts
> > to the rear, I will be creating an imbalance in the diameter and cause
great
> > strain on the power train.
> >
> > My CCKW has a matched new set on the outsides and the innner ones are
older
> > and smaller. Last
> > year, I was driving on a smooth highway and commented to my wife that
either
> > something was
> > seriously wrong with the truck OR I had a flat on an outside tire. I
could
> > hear the straining in the
> > power train. I had a flat and so it was riding on the smaller innner
tire
> > causing binding.
> >
> > Now if you have a sprag xfer I think you are SOL....
> >
> > Steve AKA Dr Deuce
> >
> > PS: GMC did have a 'high traction' differential set up, but it was not a
> > locker or posi
> >
> > ----- Original Message -----
> > From: "tonygull" <tonygull@ozemail.com.au>
> > To: "Military Vehicles Mailing List" <mil-veh@mil-veh.org>
> > Sent: Wednesday, October 23, 2002 5:58 AM
> > Subject: [MV] CCKW Differential locks...also rear brake&axle O/H
> >
> > > Greetings,
> > > I am overhauling my CCKW rear brakes and have found something
surprising.
> > > When i tried to turn the wheels i could not do so until i jacked up
both
> > > sides.
> > >
> > > With both sides jacked up on the rear-rear dif if i rotate the wheels
the
> > > other
> > > side wheels rotate in the opposite direction. The propshaft did not
rotate
> > >
> > > On the front axle i can rotate the wheel with only one side jacked up.
> > >
> > > On the intermediate axle i could not rotate the wheel with the other
side
> > on
> > > the ground.
> > > the propshaft wanted to rotate, I did not jack up the othe side.
> > >
> > > I tested a car i know has limited-slip dif, when both sides are jacked
up
> > > the wheels
> > > rotate in opposite directions. (This is what i have been told is proof
dif
> > > spin-limiting devices are fitted
> > >
> > > This strongly suggests to me that both rear axles have locking
(no-spin)
> > > difs.
> > > I have heard Detroit locks are available for GMC 2.5T axles.
> > > I also believe the IH version of the WWII Deuce had rear dif locks
> > standard
> > >
> > > Is there some other explanation?
> > >
> > > My truck has been modified for HEAVY-DUTY off-road use, so it is
possible
> > > Transfield fitted some sort of locking dif...is there an easy way to
> > > tell?..with the dif cover off??
> > >
> > > The other good thing i found was all my rear brake cylinders had been
> > > sleeved
> > > with brass, which was just as well as everything was siezed..it was
very
> > > hard
> > > to get the drums off, cause the adjusters were not operational.
> > >
> > > It must be a common problem..they are Delco-Remy 1.5" cylinders and
the
> > > rotating outer
> > > adjusters rust onto the outside rim of the cylinders..I polished them
with
> > > 400 wet&
> > > dry, then a thin smear of copper anti-sieze, followed by rubber
> > > grease..worked
> > > like magic.
> > >
> > > The pistons were siezed in the cylinders, but cause of the brass
sleeve, a
> > > light
> > > hone and new rubber seals (proceeded by lots of cleaning) now like new
(I
> > > painted the
> > > cylinders and all).
> > >
> > > Fitting new hub seals was a pain, I had to knock out the hub bearing
race
> > > with a punch.
> > > then the wheel did not want to go back on axle flange cause the new
hub
> > > seals were tight, even after soaking in oil.
> > >
> > > Also all the bearings were perfect (and Japanese so i can tell they
have
> > all
> > > been
> > > replaced in the not-so-distant past).
> > >
> > > regards Tony
> > >
> > > ps I saw the 2nd last episode of Band of Brothers, which featured
convoys
> > > of CCKW, DUKW, Jeep, Dodge and APC, by far the best episode for MV
viewing
> > >
> > >
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> > >
> >
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>
> ===Mil-Veh is a member-supported mailing list===
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