Truck Transmission PTO Units

While we're on the subject of PTO units that bolt to truck transmissions, does anyone know of a database or website with info on these? I have one with zero ID aside from a casting number. Its tag is missing. It has straight-cut gears, so I'm assuming it must match up to an old transmission.

 

I spent hours upon hours looking a couple years ago for info on them. I was never able to find anything on units more then a couple years old.

 

I took mine to a big truck center that sold dump and utility beds. They had catalogs on all different types of pto's. Most common brand i found were Chelsea and Muncie. They are considered 6 bolt.

 

Well, I did the hours-long search last night on this thing and came up with nothing. I didn't find another single unit with a straight-cut gear, and the only transmissions it would concievably fit are obsolete crash boxes, or maybe a rare straight-cut 205 transfer case that no one seems to know when or what they came in. I guess it's scrap.

 

I hope someone finds info on these, it seems like if you could get it to fit between the frame rails, it would be pretty cool for a winch or on board air or something

 

As Howard stated, the case and flange are standard size. The sliding gear should be available for most PTO ready transmissions. A heavy truck or body dealer should be able to help with he correct gear.

 

Muncies are generally blue and aluminum That looks to be a Chelsea. They are usually cast iron and red with the aluminum cover with the little locating pins spaced around the shift cover for use with various brackets. Pull the gear and check for numbers on the gear itself. That will most likely be trans specific and may yield what it fits if you can get a competent parts person.

 

Almost impossible to find info for 40 to 50 year old units. Unless you physically take it off a transmission yourself there really is no way to know what these fit anymore.

 

My vote is also for a Chelsea. That looks pretty close to what I installed on our old '57 Mack B61 when we converted from a road tractor to a dump truck. It too had straight cut gears. I took that thing in and out about 6 times trying to get the shims set correctly. They were real noisy if they weren't set up correctly.
-Donny

 

Agree with the above post, be sure to shim correctly. Too loose is better than too tight.

 

I would contact these guys: Chelsea PTO Parts for Your Vocational Truck and Equipment Applications

 

They generally go back about 10 years. They can sell you one for any current transmission though.