From: Bjorn Brandstedt (super_deuce@hotmail.com)
Date: Sun Jun 13 2004 - 14:13:48 PDT
Sonny,
It's the drive shaft between the tandem axles. Without a differential in
this connection, the bogie resists any turning motion. The front tires have
to work overtime and get worn out very quickly.
The theoretical turning circle for this truck with a wheel base of 154
inches and a steering angle of 24 degrees is about 64 feet.
The manual calls out 74 feet so something isn't performing even close to the
ideal. When I removed this drive shaft on my deuce, the new turning circle
was measured to be 66 feet. Much better!
Bjorn
>From: "Ida Heath" <spike@defuniak.com>
>To: "Military Vehicles Mailing List" <mil-veh@mil-veh.org>
>Subject: Re: [MV] Bjorn's recipe for long front tire life (M35)
>Date: Sun, 13 Jun 2004 14:34:53 -0500
>
>Bjorn,
>
>Which driveshaft are you talking about taking out? The one going from the
>intermediate differential to the rear differential?
>
>Sonny
>
>
>----- Original Message -----
>From: Bjorn Brandstedt <super_deuce@hotmail.com>
>To: Military Vehicles Mailing List <mil-veh@mil-veh.org>
>Sent: Sunday, June 13, 2004 10:16 AM
>Subject: Re: [MV] Bjorn's recipe for long front tire life (M35)
>
>
> > You are welcome.
> >
> > By far the most important fix is the removal of the interaxle drive
>shaft.
> > With it installed the truck suffers from severe understeer and is pushed
> > forward through the turns. That's what causes the cupping and tire wear.
> > Without the driveshaft, the turning radius is reduced to 33 feet (in my
> > case, measured repeatedly in a paved parking lot). The manual calls out
>a
> > turning radius of 37 feet.
> > As far as I know, the A3 version has the same problem.
> > A good front end alignment is just "gravy".
> > Lowering the tire pressure in the rear will put more tread on the road
>for
> > an even wear.
> > More pressure in the front because 50 psi just isn't enough for the
>load,
>at
> > highway speed, anyway.
> > If you have any questions, let me know.
> > Bjorn
> >
> >
> > >From: Marc Strangfeld <curlyjoe98@yahoo.com>
> > >To: "Military Vehicles Mailing List" <mil-veh@mil-veh.org>
> > >Subject: Re: [MV] Bjorn's recipe for long front tire life (M35)
> > >Date: Sun, 13 Jun 2004 07:25:04 -0700 (PDT)
> > >
> > >Thanks Bjorn
> > >
> > >I am in the process of putting 11.00 singles on mine
> > >and will follow your advice, except for replacing the
> > >springs. My trip out west is a good test due to the
> > >constant driving and extreme heat. Last year two 80%
> > >fronts were trashed in 3,000 miles from the exteme
> > >cupping.
> > >
> > >Marc
> > >
> > >
> > >
> > >--- Bjorn Brandstedt <super_deuce@hotmail.com> wrote:
> > > > Friends,
> > > > Following research for a future article in the
> > > > Military Vehicles Magazine, I
> > > > have come up with a recipe that will reduce the
> > > > front tire wear on the M35
> > > > 6x6 trucks:
> > > >
> > > > 1) Remove interaxle propeller shaft (most
> > > > important!)
> > > > 2) Replace shocks and springs if they are originals.
> > > > 3) Tighten front wheel bearings 1/8 turn on the
> > > > adjusting ring (check for
> > > > abnormal heating after the first couple of test
> > > > drives). This will reduce
> > > > camber and toe-in errors.
> > > > 4) Adjust toe-in to 1/8 inch max.
> > > > 5) Increase front tire pressure to 60 psi and lower
> > > > rear (duals) tire
> > > > pressure to 40 psi (9.00-20 tires)
> > > > (Run on 60 psi on all tires if they are single
> > > > 900's or 70 psi on all if
> > > > single 1100's)
> > > >
> > > > This will also give you a turning radius, which is
> > > > much closer to the ideal.
> > > > Keep the front drive flanges installed for 4x4
> > > > action when needed.
> > > > Your fuel milage will also improve.
> > > >
> > > > Have a great day!
> > > >
> > > > Bjorn
> > > > MVPA 19212
> > > > Meadows of Dan, Virginia
> > > >
> > > >
> > > >
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> > >
> > >
> > >
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