I have what appears to be a 5 speed overdrive in my F250. According to the vin this truck had a 4speed all synchro.

This trans has 6 positions, 4 speeds, reverse and one at 12:00 that says "OD". Would this mean it came out of a heavy duty truck like a 500 or 600?

 

Yes the 5sp overdrive was an option in f600 -f750 their were 3 versions, light, medium, heavy duty

The light duty overdrive had the following ratios
6.15
3.64
1.89
1.00
.798
6.00 rev

 

That makes sense, thanks. Any key physical traits I could spot to pin it down? Anything bad about having this trans in the truck?

And BTW, its coupled to a Lincoln V8 with an ECM id no which shows it was off the same era - I guess either out of a Lincoln (valve covers) or out of a big truck as this is a Y Block engine which I guess they used in both.

 

I've never actually seen one, but I wanted one very badly when I had the y-block ... so yes I think you have a very desirable engine / trans. combo.

Are you driving it yet? ..... picture's, we love picture's

BTW welcome to the forum.

 

Engine doesn't run - has been sitting A LONG time.

Unfortunately I'm going to have to sell it as my daily driver just blew an engine and I'm going to need the money.

Heres a few pics just for grins...



https://www.flickr.com/photos/124151559@N04/

 

Looks like a decent truck! Shame you've got to sell it...

That shift pattern just screams clark 5spd.

Sam

 

It is a very decent truck and yes it is a shame. As for the tranny you've got me on that one - Clark 5 spd?

 

Clark supplied heavy duty 5 speed transmissions to many of the medium duty truck builders, Ford used a lot of them, so did Chevy. They're a great transmission, just a bit heavy and slow shifting. You'll never break it though!

Sam

 

Yes, the dead Clark give a way is 1st & rev is on the right and Spicers
1st & rev is on the left on both direct an Od 's -

the other Sam

 

The engine and transmission are a unit from a larger truck. The giveaways on the engine are the water pump and crank pulley, which are set up to mount a wide belt fan from the water pump. Hopefully someone here can purchase it, or the purchaser will join here. A very interesting truck.

 

Well thanks for all of your input. I had a feeling it was a large truck set up but its nice to hear that from the experts!

It also has an aux gas tank mounted under the bed which looks to me like a factory(?) or at least of that era option. Very sanitary with a large glass topped fuel filter mounted in line that looks like it could have been a large truck extra too.