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Hmm, good point. Maybe I'll be glad that I did the mod in an easily reversible way...

I'd be happy to see even a soft gondola top on my new wrecker, but sadly, that's not one of the things it came with. It did come with all of the snatch blocks (OMFG those are heavy!) and an excess of tow bar feet, though. But no pins for the whiffletree. And no hazard light; I don't recall...

I think my valve is different than yours, then. I thought that I would be able to just rotate the arm like you did, until I found it pinned onto the shaft with a roll pin in a blind hole. On mine, that phillips head screw draws a rectangular wedge against the shaft. The hole that the wedge goes...

The TC PTO lever is the one at the left rear corner of the cab, that engages the crane pump, right? I haven't looked at the mechanism underneath at all yet. Up on top, I've found that the driver's seatbelt retractor is in just the right spot to interfere with grabbing that PTO lever. The safety...

AHA! So that's how the vertical hole is supposed to work. Doh!

Here are pics from my M543A2 and M936A1.

I moved the valve to the other side of its mounting bracket after temporarily disconnecting one of the air lines to reroute it a bit. With the new valve location, the round disc on the transfer shift linkage doesn't contact the valve's roller arm any more. Several drops of oil smelling of gear...

Nobody gets much leg room in a HMMWV. Not even the driver.

I got the valve mounting screws out with difficulty, and impact driver, and vice grip pliers. If one of the air lines was just a tiny bit longer, then I think I could just move the valve to the other side of its mounting bracket so that the disc on the shift linkage would no longer hit it. So...

I'm about 90% sure that it is, so proceed with caution. The air lines could be removed and plugged, but you'd need to study the TM/PSP carefully to make sure the manual front axle engagement will still work. Anything that prevents the round disc from pressing the lever on the valve should work...

Have any of y'all identified a supplier of the raw material that they use to make floor mats in HMMWVs, M939-series trucks, etc? I think it would be ideal for retrofitting trucks with bare floors, as well as repairing worn out mats. It's a very heavy black foam about a half inch thick, with a...

I just tried repositioning the arm on the valve which engages the front axle in low transfer range on my M923. No success yet. Click the pictures below to enlarge them. Here's a wide shot of the valve and the front of the transfer case: Here's a close-up of the valve in high range: Here...

The M923's tow rating is 15k pounds according to the manual. That may be pretty conservative for on-road use, though. You would need to build a receiver hitch for the truck, since it has a rotating pintle hitch mounted much higher than your Dodge's receiver. If the trailer has electric brakes...

LOL! Well, I hope that having two wreckers is only temporary... just like having six deuces was.

I think it would be easier and less destructive to rotate or remove the lever arm on the air valve that the engagement plate bumps into. I haven't tried it yet, so I don't know if that little arm is keyed to only go on the valve's shaft one way. I might try it today...

I think that should be easy to do. I discovered (after some wheel-spinning...) that my M923 front axle wasn't automatically engaging in low range. The cause appears to be that the transfer shift linkage isn't pressing the lever of an air valve under the truck quite far enough. I could fix it by...

I don't think that the locking cylinder being discussed here has anything to do with reverse gear. There is an add-on kit to interlock the transmission/transfer to prevent using reverse in low range, but that's not present on all trucks, and I think it's entirely mechanical. I think that the...

Great work, guys! [thumbzup] P.S.: The trailer in the background is a 101, not a 105.

One of my co-workers suggested that I take a picture of my two wreckers while I still have both of them, with their booms crossed in the air. So, today I did that, but I'm having trouble coming up with a caption for the photo. Maybe y'all could help out? (click the picture to enlarge it) On...

Yeah, that's why I suggest welding something on for a retrofit. I was surprised to see such a thin piece of metal drilled that way. It's doable with a drill press, but would be challenging with a truck welded onto it.