July 6, 2020

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Railroad-grade idler arms?

ANYTHING TO DO WITH STEERING, FROM STOCK TO RACK AND PINION UPGRADES

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Bret Schmerker
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Railroad-grade idler arms?

Post by Bret Schmerker » Thu Jun 25, 2020 5:00 pm

:-k General Motors Corporation seems to have undersized the bearings for the M-body steering linkage; even the MOOG® stock-replacement idler arms, which are made of better alloys than the ACDelco®/GM original, give out sooner than ideal. Among the rebuild contingencies I'm preplanning for my 1997 M11006 is a set of larger-than-stock idler arms with needle roller bearings at both the frame attach and the relay rod, built consistently with those Pacific Performance Engineering manufactures for severe service on full-size General Motors K1500/2500 applications but with the addition of the frame-pin brackets necessary on the M-body; and a new-design relay rod as well, if the stock relay rod cannot fit the upgrade arms. Are the severe-duty idler arms (and relay rod if necessary) currently available; or can a fully-equipped machine shop craft them, given the dimensions for the whole system and alloy and hardness specifications for the subparts?
1997 GMC M11006 (Safari SLE, 2WD, V6-4300/4L60-E/7.625" 3.73:1 open)
Acquired Jul 2018 / In service Sep 2018 - present

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timelessbeing
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Re: Railroad-grade idler arms?

Post by timelessbeing » Thu Jun 25, 2020 7:49 pm

Bret Schmerker wrote:
Thu Jun 25, 2020 5:00 pm
can a fully-equipped machine shop craft them, given the dimensions for the whole system and alloy and hardness specifications for the subparts?
a machine shop will make you whatever you like. At a cost more than the van is worth.

The good thing about idler arms is they are cheap as chips and easy to replace. Just get ones with grease fittings.

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okie1
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Re: Railroad-grade idler arms?

Post by okie1 » Fri Jun 26, 2020 11:48 am

timelessbeing wrote:
Thu Jun 25, 2020 7:49 pm
Bret Schmerker wrote:
Thu Jun 25, 2020 5:00 pm
can a fully-equipped machine shop craft them, given the dimensions for the whole system and alloy and hardness specifications for the subparts?
a machine shop will make you whatever you like. At a cost more than the van is worth.

The good thing about idler arms is they are cheap as chips and easy to replace. Just get ones with grease fittings.
This, timelessbeing is correct.! :cheers:

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