5 ton differential ?

[bob599]

Hello I'm new to the site. I am purchasing a M 939A2 tractor. I was looking to put a M109 box or S280 on it. However I just saw a video on YouTube about a crew cab conversion that stated the short wheelbase tractor units did not have locking differentials. Haven't heard this before. Is this true, or do you know where I could verify this information?

Thanks and and love the site!

 

[SLOrazorsedge]

Not true in the M939 series trucks. Many USMC and Navy Seabee M939 trucks to include M931, M931A1 & M931A2 truck-tractors have locking differentials. I have a M931A1 w/o anti-lock brakes, with fording kit and lockers.

 

[MWMULES]

Most but not all of the 939's with lockers I have seen (former USMC ones) also have a sticker on inside of drivers door stating that it has lockers.

 

[bob599]

Thanks for the responses! So then some 5 tons have locking differentials and some do not?

 

[DJones]

Thanks for the responses! So then some 5 tons have locking differentials and some do not?

That is correct and most don't have them.

 

[Csm Davis]

But you can buy them and add them to any of the 939 series.

 

[TheUgly]

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[porkysplace]

Where can you buy them from?

Searching the classifieds here would be a good place to start .

 

[Csm Davis]

Me or Google

 

[TheUgly]

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[Csm Davis]

Call or text

 

[TheUgly]

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[Stevepala]

I have a set of air locking type axles if your interested.

 

[TheUgly]

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