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[GMCnet] Reminder Torsion Bar installation and other stuff. [message #247123]

Fri, 11 April 2014 14:05

p.huber

Messages: 73
Registered: June 2012
Location: Oakland

Karma: 3

Member

Hi you all,

Just a reminder regarding the installation of the Torsion Bars. Each Torsion
Bar is stamped with an �L� and the other Torsion Bar is stamped with an �R�
.

The torsion bars should be installed with the �L� and �R� going into the
porkchops. �L� stands for drivers side, �R� for passenger side.

Don�t� forget to grease up the hex going into the lower A frame.

I came up with an easier way to have the height adjusted on the GMC. I use a
4X4 X 9 �� long for the front and a 4X4 X 8 1/8� long for the rear.

Adjust the rear first on a level spot, by putting the 4X4 X 8 1/8� wood
under to the frame. Once the rear end is adjusted properly do the same on
the front end.

However you have to put the 4X4 X 9 �� long wood on the side of the frame
and then adjust the Torsion Bar by cranking up the porkchop. After that
drive around to settle the coach and re-check the heights in the rear and
front.

Minor adjustment might be necessary.

Happy GMCing

Peter D. Huber

GMC Royale 1978 403

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Re: [GMCnet] Reminder Torsion Bar installation and other stuff. [message #247160 is a reply to message #247123]

Fri, 11 April 2014 19:08

Richard RV

Messages: 631
Registered: July 2012
Location: Full-timer for 12 years, ...

Karma: -17

Senior Member

Peter,

The TBs arrived! Thanks.

That's interesting about the blocks. So it appears that the different length blocks are meant to account for the GMCs non-level frame (different ride height slot measurements fore and aft).

Please clarify something for me. Your blocks differ in length by 7/8".

The slot height specs are
Front @ 13-1/8"�1/4"
Rear @ 11-11/16"�1/4"

That's a difference of 1-7/16" in fore/aft ride height.

Won't the lower differential length blocks, plus the sag from the torsion bar windup put the front ride height too low?

It would be nice to have blocks cut to a length to set an almost perfect ride height and accounting for torsion bad windup and the "settling in drive drop".

Richard

'77 Birchaven TZE...777; '76 Palm Beach under construction; ‘76 Edgemont waiting its turn

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