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I've replaced ALL of the steering linkages forward of the drag link - everything new. I've installed a drag link refurb kit. So, I'm at the pitman arm and steering box. I should have looked here first as there is much play between the casing bushings and the segment shaft - when I turn the wheel I can see the shaft move radially before it rotates (bushings and shaft wear) and I can see play between the segment shaft and the pitman arm. I'd like to replace EVERYTHING so my question is: I need a segment, bearings, bushings and seal kit, pitman arm and I believe there is a bearing at the top of the steering shaft (between shaft and tube) - correct? I'd like to replace the horn switch (I have the rod through steering shaft down to switch on steering box housing) as the wiring is falling apart - it works but I don't think it's worth the time and hassle to try to fix - and I'll replace the steering shaft if the worm gear portion appears to be worn (I will assume the worst). And lubrication - I'm going the oil route. I have found enough info on the net to guide me through the overhaul - it seems pretty simple but, again, I'll assume the worst - like chiseling out the bushings, or having to fabricate some special tool!!!

They are as simple a steering box as you will ever find. Easy to overhaul. No mysterys. All the overhaul data and procedures are in your TM 9-1804B. The rod and lower end horn switch are also simple to repair ans set up. You will need to be sure which box you have. They were swapped and traded a lot over the years. There's an early unsealed hard button M38 assy and a late sealed rubber button M38 Assy. The M38A1 uses a much more robust unit but the ratio is a bit too scary with the M38 chassis.

You'll find the worms once in awhile FS and the pitman arm can be found occasionally as well. The sector pins can be welded up and reshaped. DeBella, MWM and AJP have the button kits, switches, bearings, bushings and gaskets. I believe MWM has replacement horn rods as well.