RW613 Superliner rear crossmember

[FarnorthMN]

Looking for rear suspension crossmember for my 1986 superliner.  its for the rear shocks on NeWay air suspension.

let me know what you have. thanks! 

[Geoff Weeks]

Looks like your going to be needing some torque arm bushings as well!

[FarnorthMN]

25 minutes ago, Geoff Weeks said:

Looks like your going to be needing some torque arm bushings as well!

I am struggling big time finding part numbers 

[Geoff Weeks]

Atro should be able to either get bushing or possibly whole torque arms :

https://atrobushing.com/atro-torque-rod-finder

 

P.S.their older catalog, had the bushing by dimension as well, their newer catalogs I find harder to use.

I might have an old Atro cat on a hard drive, if I can find it I'll post it. 

Edited 6 hours ago by Geoff Weeks

[Vladislav]

What you have at the rear is a common style Mack chassis crossmember. They were used on many trucks with Camelbacks and other rears in the central portion of the chassis. Just were put upside down overthere. More correctly, the very rear crossmember on your truck put upside down to clear up the trailer pin for coupling (and that's a common practice). Those "common" crossmembers may have holes for the shock brackets. If no you just drill them. There's one point though you need to keep in mind. Frame width is different between RW and earlier Mack model such as R, U, DM, F etc (which used to use those members) Those are narrower so you need a parts from a RW2 (after 1985) or MH Ultraliner (similar chassis). Or you can use a R-model part adding spicer plates.

P.S. CH and later models have different distance between the rails too.

[Vladislav]

A couple add ons.

There's a variation of that cross member as a double style when two similar webs are welded together for more rigidness (the 2nd pic). You can use it too paying attention to the shock brackets (using spicers again or so).

And if you find a trouble locating a used part you may contact PG Adams in Vermont. Those folks specialize in fabrication of frame rails for trucks and also offer variety of crossmembers of different styles.

[Vladislav]

17 hours ago, FarnorthMN said:

I am struggling big time finding part numbers 

Check out PAI FKT-4736 and FKT-4737.

I've got a trouble with one rod though when PAI bushing was found loosy in the hole. Another rod pressed in Ok. So seems like there could be different vendors of rods with differences in internal specs.

[Geoff Weeks]

A lot of those bushing all look the same, but there are different O/D's for different rods. IHC used some like that and they had forged rods and fab'd rods (tube) and they bushing were different. Also some of Atro's rods were of their own design and took yet another bushing, all have the same dimensions between mount holes.

I would clean up the forged rods and through the bushing in the freezer for24 hrs, then press them in. Good results doing that. The fab'd rods weren't as good so sometimes would just by Atro's pre made units.