6x6 all gears - Steel Soldiers::Military Vehicles Supersite

wharfman · 01-12-2010, 11:19

Hi i have a m818 can i put a switch in so i have the front end engaged in all gears like a m35 does

73m819 · 01-12-2010, 11:35

no need, it will have front wheel drive in all gears anytime it is needed, as soon as the rears slip the front will engage

Barrman · 01-12-2010, 11:35

The 5 ton has the Sprag style tcase. The front axle engages when the rear tires start to spin faster than the fronts. When you put it in reverse, can you hear the air pushing the selector? Actually, it is more of a thunk when you put it into gear and a hssss when you take it out of reverse.

wharfman · 01-12-2010, 12:14

Thanks for the info

kurtkds · 03-04-2010, 23:01

I was wonder about the air selector switch myself. I wasn't sure if I should hear the air shift only when I go from neutral to reverse and back, or if I would also hear the air shift going from neutral to first.

Wasn't sure if I needed to tear into it, but it sounds like it's working normal.

Hammer · 03-05-2010, 14:08

You only hear the thunk going INTO reverse, and the release of air when taking it OUT of reverse.

Also note, just because you hear the hissing air being released, does NOT mean that it is actually engaging the reverse sprag!
On a new-to-me truck, I like to drive the truck a little bit, move the oil around some, then repeatedly shift from reverse to neutral. After a couple of times doing this, it seems to get that sprag to engage like it should. After that I haven't had any problems.

militarysteel · 03-05-2010, 14:27

Yeah i hear ya, i do enjoy the air engagement with the M35A2, you could take it out in the mud and try to see if the front end eve works.
most of the time they do not. The 900 Series was changed to the Air Engagement like the Duce.

wrench · 03-05-2010, 20:12

Just picked up an 818 tractor, was trying to figure out how the front axle engages(on ice) noticed that the front drive shaft didnt turn when the rears were spinning, then tried it in reverse and the front was spinning( I actually had the truck against a cement wall with it throttled up) is something broke??
Thanks.

Alredneck · 03-05-2010, 20:31

There is a old post somewhere on here, that tells you how to convert the 5ton sprag to a air shift switch for positive engagement. I have looked for this post but the search on here still sucks. Hopefully someone will post a link to said post so we all can be wiser! I am trying to do this mod on several 5tons and pics would also be a help if some has done this already!

jwaller · 03-05-2010, 21:45

Quote:

Originally Posted by wrench

Just picked up an 818 tractor, was trying to figure out how the front axle engages(on ice) noticed that the front drive shaft didnt turn when the rears were spinning, then tried it in reverse and the front was spinning( I actually had the truck against a cement wall with it throttled up) is something broke??
Thanks.

sounds like the forward part of the sprag is fubar. same as mine.