Bill,
Thanks a bunch for your detailed reply. While I'm not unhappy with my
1-Ton's steering, I do wish I had the energy, equipment, and, mostly,
skills, to do what you've done. Looking at your album, it's obviously not
something that can easily be "kit-ized". Too bad.
I'm sure many others were glad to get your report.
Ken H.
On Sat, Oct 26, 2019 at 8:47 PM Bill Wevers via Gmclist <
> Hello Ken,
> Tequilla, that would be me. My reason for modifying the front end was that
> my coach wandered,
> and did not go straight and required constant steering corrections with
> the One-Ton front end.
> I thought if I copied the upper control arm geometry from the K2500/3500
> Suburban, it would track better.
>
> The short answer is that it now tracks straight and is not affected much
> by crosswinds or when
> the body rolls when going through turns. But it was a lot of work.
>
> I started by making mounting plates from 3/16" hot rolled steel and
> temporarily bolting them in place
> before welding them to the frame. I made temporary bolt-on plates to check
> the alignment.
> The temporary plates were tack welded to the old upper control arm
> mounting brackets.
> Basically it involved cutting off the old upper mounting brackets and
> welding on new ones.
>
> That solved the camber change problem. But then I encountered a toe-change
> problem.
> The new geometry caused the front suspension to toe-in when braking. This
> is because the
> GMC Motorhome tie rod is lower than the K2500 tie-rod location. To remedy
> this problem,
> I installed a Speedway Motors bump steer kit to lower the tierod ends 5/8".
> No more toe-in under braking.
>
> But I now have Heim Joints and Chrysler adjusting sleeves instead of
> tierod ends.
> I would describe the handling as "it wants to go straight", feels like
> more under-steer in turns.
> And the body roll does not cause it to steer into the turn. Feels like a
> driving a Suburban.
>
> So far no problems in 3 years.
> Regards, Bill
>
>
>
> --
> Bill Wevers GMC49ers, GMC Western States
> 1975 Glenbrook - Manny Powerdrive, OneTon
> 455 F Block, G heads
> San Jose
>
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