Posted by Jesse Ybarra
on 6/4/2012, 10:51:31, in reply to "body shock mounts"
205.188.117.15
Mark,
I have found that the M-series trucks came with 1" metal spacers and the 1" rubber body mount bisquets, The wide track and later FCs used these rubber mounts without the spacer and the Narrow tracks used a thin pad. Most Jeep shops sell the stock replacement rubber mounts, but after a year they start to crack.
Because the design of those original rubber mounts was for use as one of eight mounts to be equally spaced under the wieght of a CJ or an Overland Wagon or truck. It is not the best body mount to support the wieght of a very heavy FC cab with only 4 mounting locations. The stock design of an FC is to use the pad between the frame and body only, in front mounting, and the addition of double springs and washers on the rear.
I suggest that you discard the all threaded rod and use real grade 8 bolts and nuts instead.
If you want that look of the extra inch, then I suggest using 1" steel aftermarket body spacers.
Doubling the rubber pads makes for even more of a potential problem because it allows more side with the already small 3/8" bolts allowing movement.
So here is my solution, a non original non conventional way that I set up the front, I use hockey pucks or Semi trailer rear bumper rubber donuts on FCs. I drill the pucks or bumper pads out to have a 7/16" center hole, then I use thick steel construction washers that have 7/16" holes, and you probably already guessed, I use only grade eight 7/16" bolts. I use a dab of wheel bearing grease on the bolts and body hole.
The cab body of an FC is very heavy, but adding the safety of the people is worth more that the cost of good bolts. I had to reread that you had 5/16" all thread for bolts.
Jesse Ybarra
--Previous Message--
: I pulled the bumper and front shroud off the
: 170, quick inspection of brackets, etc.
: Noticed the two front body to frame shock
: mounts were dry rotted and slightly out of
: alignment. The body is not aligned exactly
: over the mounting holes on the frame.
:
: Any suggestions regarding replacement type,
: style for the shock mounts and bolt
: assembly? The existing front cab mounting
: bumpers are a pairing of two, stacked, black
: donuts, about 3" in diameter by 1"
: thick on each side, raising the cab about 1
: 3/4" off the frame / horn. There is no
: inner sleeve in these donuts and the cab
: mounting bolt seems to be a cut length of
: 5/15 (?)threaded rod... I would like to
: retain the distance the body sits off the
: frame, due in part to the bumper mounting
: bracket location. At present, there is no
: rubber shock on the top side, in the cab. I
: can see the threaded rod end and a bolt,
: thats it. Is there any need for the bolt /
: nut in the cab to have some sort of
: isolation doughnut or??? If someone has a
: set of NOS body mount shock assemblies or
: knows who may have some, I would be
: interested or any other aftermarket
: suggestions or sources.
:
: thanks! Happy Motoring
:
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