transmission identification help

[half]

Hi everybody,
First off I'd like to say, great site. There is a ton of useful information here, thanks. Now down to business. I have what I believe to be a 5 ton, M809, M55A2, truck. It's a multifuel, 5spd manual, from the early 70's. I am trying to find out who manufactured the transmission, and what the model number is? Any help would be great. Thanks.

 

[Tinstar]

Have you crawled underneath to look?

Should be a data plate on the transmission telling you what your looking for.

 

[half]

Yes I have, the ID plate is gone. From the research I have done it appears to be a Spicer, model 6453. I need to confirm that.

 

[NDT]

6452 would be with the multifuel, direct top hole.

 

[gringeltaube]

It should be a SPICER model #6452 (5th direct) behind that Multifuel.





Oops, NDT, you typed faster!







Edit: I should have said #6352
(thanks, Kenny!)

 

[half]

Thanks for the quick replies.

 

[Recovry4x4]

Isn't 6453 OD and 6352 direct drive?

 

[AMGeneral]

I have seen and owned 2 Multifuel powered 5 tons that were equipped with 6453 OD transmissions,both would run 73 mph at governed speed of 2900 rpm with stock 1100 X 20s.

I believe both of them were Depot rebuilds, those may have been the only transmissions available through the parts system at the time.

NOTE!!

I do not recommend installing an OD trans in a multi powered 5 ton,they are very unstable at those high speeds.

 

[gringeltaube]

Isn't 6453 OD and 6352 direct drive?

Yes, that's correct.

 

[half]

So I could have a 6453, 6352, 6452? The reason I'm trying to identify the model, is to see if I can put a hot shift pto on it.

 

[NDT]

I do believe the PTO is the same gear engagement pattern between the 6452 and 6453. Hot shift????

 

[gringeltaube]

.... a hot shift pto....

Yes, please explain...!

 

[half]

It's an air operated, clutched pto that can be engaged and disengaged while moving.