Chaffee Transmission Questions

[Bob Phillips]

why dont you compare a chaffee tranny parts book against a G749 hydramatic transmission book and see if there are common parts in both transmissions. If so call Brian Asbury who may still have some old rebuilt G749 transmissions available to strip for parts. Just a thought.

[Malcolm Towrie]

Thanks, Bob. My problem is I don't have a parts manual for the tranny. Also, I can tell from the photos and info in my 1945 Chaffee tranny manual that I don't have an original tranny. I assume it's a later model. And I'm finding that GM tweaked their newly-designed hydramatic every year, so by the time they were being installed in the deuces, there were a lot of differences.

Anyway, I got lucky. The damaged apply piston has the part number cast into the aluminum and I found a NOS one on eBay for reasonable money!

Rebuild gasket and seal kits and clutch plates are still available so I should be ok now, although the blistered cooler worries me. I'll just have to pressure test It (gently) and reuse it.

Fingers crossed the other tranny, which is also acting up, doesn't need any hard parts.

Malcolm

[Frank v R]

try calling Bob Rubino in NJ tell him I told you to call, Milspec Restoration
908-475-2799 he may be able to shed some light on the cooler , and if you need parts try calling Brent Mullins jeep parts, he does a lot of Armour and has lots of NOS parts
regards Frank

[Bob Phillips]

i used to have a couple of used transmissions for the Chaffee and I think they were shorter than most hydramatic transmissions and had no reverse gear, the reverse being in the transfer case. would a later transmission still work in a \chaffee or is this a non Chafee application?

[Bob Phillips]

So I just checked my G749 ord 9 and the oil cooler for the G749 which appears identical to the picture posted is identifed as G200-5608479 cooler assy, oil
This means it is the same in both applications. Used G749 transmissions are still widely available in Ontario junkyards, no need to go far. If you can't find one pm me for more leads.

[Malcolm Towrie]

Thanks, Frank.

Bob, these trannies are in a Chaffee. Yes, your right, the reverse gear is in the transfer case. The tranny connects directly to the t/c with a short stub shaft so there is no room for a reverse-equipped Hydramatic.

That's great info about the cooler because we have some old M135's here at the museum I can steal parts from. I'll check them out and see how easy it's is to drop the pan. I may even pull a tranny because the outer torus has worn splines and I'd like to replace it too.

Malcolm

[Malcolm Towrie]

Originally Posted by Bob Phillips

So I just checked my G749 ord 9 and the oil cooler for the G749 which appears identical to the picture posted is identifed as G200-5608479 cooler assy, oil
This means it is the same in both applications. Used G749 transmissions are still widely available in Ontario junkyards, no need to go far. If you can't find one pm me for more leads.

Bob, can you give the document number for the "G749 ord 9" you refer to? I'd like to get myself a copy.

Also, can I ask a favour, does the ord 9 show part numbers for the seals for the cooler? These seal around the two cooler nozzles, separating the water side of the pan from the oil side. Each nozzle has a flat fibre washer and an unusual chevron-shaped sealing ring.

Thanks, Malcolm

[Frank v R]

if you have problems with some of the seal number give me a call , I have a old school seal cross over book,