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Here's some pictures of that poor transmission I just tore down. You see that ring in the case ? That was from the front clutch assembly grinding into it. It was almost through the metal. This oil delivery sleeve has the seal ring welded in ! I have never seen such heat related damage ...

No automatic transmission was ever designed to use 30W oil, including the HydraMatic. GMC just gave the military a "waiver" on using 30W oil since the military mechanics didn't know what to do with an automatic. Plus, it was one less oil the military didn't need to stock up on. If you had ever...

Great !!! Thanks Duuane. It will be nice to see your new place.

Hey if that cab is in decent shape I'll buy it from you. I was just up there at "100 Mile House" in early September. Got some transmissions and other parts from "Lyle" . If you have any questions about the M135 talk with "plowboy" and "Duuane" . Both have extensive experience with these nice...

The design of the "Fuel Density Compensator" was a nice bit of engineering, but the actual part had serious designs flaws. Like no seal for the main shaft. So, after years of use the aluminum housing wears out allowing fuel to go into the crankcase. As far as needing an "FDC" you really just...

Are you buying another truck ? Is this truck for sell ? I'll buy it if you don't. I need a decent cab. I'm still tearing down transmissions trying to get good parts. This last transmission was almost a total loss. I have never seen such destruction before ! The main case was even broken ...

Of course you know I'm a "Game Of Thrones" fan !

Considering I've put on about 50 extra pounds these last few years that's a lot of Gold !

You might want to adjust your transmission linkage. Looks like it is partially in gear.

Well I finally found out what MWO "B" means. MWO "A" means the front clutch has 5 disc's instead of the original 3 the 302M came with, (though the 302M later added a fourth clutch plate, not sure when) . Also the front "servo" was replaced with one having a larger apply piston for more front...

OK "blenderdriver" , I have that information on the ARP bolts.

I'm in the process of tearing down transmission number 3 of the 5 Canadian 303M's I brought home early September. I found the transmission 'Lyle" warned me about that had died during an extraction from the mud. He mentioned the previous owner had tried to "rock" it out and during this procedure...

Tonight's little rant involves the 303M's rear oil pump filter. For you guys running your m135's with the HydraMatic, you need to clean this filter on a regular basis ! It's a small filter and easily clogs up thus depriving your reduction system of oil. Every filter I have removed lately has...

Don't bother with money for freight. It didn't cost much. Just enjoy your new servo.

I plan on rebuilding one more 303M with some special modifications just to do it. Then, I don't know. I might rebuild one for "plowboy" just for grins and giggles. I really want to get back on rebuilding the Allison 1000 transmissions I have. One of them is going into my M35A2 Deuce. By the...

Spent the day cleaning up the outer rear reduction housing on my last teardown. Tomorrow after helping the wife deal with a shipping issue, (hate dealing with Fed Ex) I'll start on another teardown. Three more 303M's to go and then two civilian HydraMatics. Maybe by next summer I'll be able to...

I forgot to get the pictures for this section. OOPS!

Here's some pictures from before the seal decided to blow up. After the large reduction piston is installed, install this thrustwasher and the two seal rings. Then comes the "Direct clutch Drum" assembly or High speed clutch. You can install the piston in there before installing it on the...

I got everything tore back down, and ordered two seals from "Fatsco" . They had eight in stock. Just that one seal. Strange how things work out. The seals will be here by next Thursday, so in the meantime I will start tearing down more 303M transmissions. I still have some information to share...

Well I'm totally pissed off today !!!! I had finished the reduction unit build-up and decided to test the pistons with full air pressure. I blew out the rubber seal on the 13" piston !!!! and it cracked the output bearing support housing !!! AH...