M923 13 Speed Swap

[simp5782]

Took some pictures today. Plenty clearance everywhere. From the center of the transmission u joint to the face of the transfer case yoke is 9-1/8”.
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Also got some new rear cab mount bushings. Just thought the difference was kinda funny.
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Cause they gave you transfer case mount bushings. Must have been Memphis equipment

They substitute one for the other

 

[Crf450x]

Cause they gave you transfer case mount bushings. Must have been Memphis equipment

They substitute one for the other

Big mikes motor pool. The web page does say they fit both. But it also shows the same nsn as the tm shows for the cab. Should I get different ones...?

 

[simp5782]

Big mikes motor pool. The web page does say they fit both. But it also shows the same nsn as the tm shows for the cab. Should I get different ones...?

Alot of us use hockey pucks and drill holes in em. Much more flex and same height as original. I order a bag of 10off Amazon when I need em.

 

[Crf450x]

If I leave the output shaft speed sensor hole (I assume that’s what it is) empty will fluid leak out? Or is that sealed? If it’s not sealed any idea what the thread size is?

 

[Crf450x]

@74M35A2 can you post some pictures of the air line routing on your trans?

 

[Dipstick]

Damn, I'm jealous. I dream of putting a 10 sp Road Ranger in my Deuce, but the Spicer trans is so short and as a result, the distance from the bellhousing to the t-case is too close as well. It looks like you're doing a first rate job!

 

[74M35A2]

@74M35A2 can you post some pictures of the air line routing on your trans?

 

[74M35A2]

Sure, will do it Monday.

 

[Crf450x]

Damn, I'm jealous. I dream of putting a 10 sp Road Ranger in my Deuce, but the Spicer trans is so short and as a result, the distance from the bellhousing to the t-case is too close as well. It looks like you're doing a first rate job!

More gears equals more fun! Honestly if these had any manual trans I wouldn’t have started this. I just don’t like automatics.
And thanks! I’m doing the best I can, making it up as I go.

 

[Dipstick]

I agree. I used to drive an old single axle White 4000 with a 238 Detroit and a 10 sp. Loved that truck! I don't want to get too far off your topic, but I'm 67 and I've never owned a vehicle with an auto. Enough of me mucking around with your thread.

 

[Crf450x]

Somewhat off topic but pertains to the cab being off I guess. Started on the dual fuel line today. That plug was fun to get out. Propane torch changed its tone though. Gonna cap it and leave it like that for now. I want to wait until I turn it up a little to see if it actually makes any difference.

Got the starter installed with the .330” spacer. Planning to start it in the next couple days to be sure it’s ok.

Also took all the transfer case linkage pins out and cleaned/greased them. The big one was rusty and almost seized. I put an o ring on each end and a grease hose so I can keep that from happening again. If it’s worth doing, it’s worth overdoing.

 

[Crf450x]

Sure, will do it Monday.

Did you get a chance to take some pictures yet?

 

[74M35A2]

Totally forgot. Will do tomorrow morning.

I just realized the flywheel housing has to use the starter in the high mount position because of the frame rail clearance due to the engine shifted over. Dang it. I’ll have to change what I have, and it does not look like the 8.3L uses a 1” thick spacer ring atop an otherwise standard flywheel housing. Yuck.

 

[Crf450x]

Totally forgot. Will do tomorrow morning.

I just realized the flywheel housing has to use the starter in the high mount position because of the frame rail clearance due to the engine shifted over. Dang it. I’ll have to change what I have, and it does not look like the 8.3L uses a 1” thick spacer ring atop an otherwise standard flywheel housing. Yuck.

I figured. No big deal at all.

That does not sound like fun. At least you discovered it now rather than later with the engine halfway in.

 

[Crf450x]

Finally have a u joint on the way. Went to 2 driveshaft shops and they both laughed when they saw the shaft (story of my life) before I even said what I needed. But a buddy of mine at truck pro found the discontinued spicer joint somewhere in Ohio and it should be here Tuesday. Hopefully that will be all I need.

 

[Crf450x]

Got the u joint today and confirmed it will work. So that’s a relief.

 

[Crf450x]

Put my u joint in today and discovered the jack shaft is too short. Only splined about 3/8” when hooked up. I don’t think that will cut it. Anybody got any ideas? Gonna see if it can be lengthened but I have my doubts.

 

[simp5782]

Put my u joint in today and discovered the jack shaft is too short. Only splined about 3/8” when hooked up. I don’t think that will cut it. Anybody got any ideas? Gonna see if it can be lengthened but I have my doubts.

You need a companion flange for the input on the transfer case and a 1710 companion flange for the shaft and another u joint like you have. That will give you 3 in

 

[Crf450x]

You need a companion flange for the input on the transfer case and a 1710 companion flange for the shaft and another u joint like you have. That will give you 3 in

I believe it would be too long....where would you get a companion flange like that anyway? I couldn’t find one the last time I looked.

 

[simp5782]

You need meritor A-3280-U-7535 companion yoke for the input shaft on the transfer case.

You need companion flange for the driveshaft part #7348215. Its the same flange as the transfer to front tandem uses. 1710. Every other flange on the truck shafts are 1610. I probably have one laying around.

You would be better to ditch that morph joint and make it a full 1710 joint and shaft