What are the lengths of the stock driveshafts available for the M35, M36

[bugwhacker]

I plan to move my transfer case and tandems back to make room for a larger transmission and was hoping to stay with stock sizes if it works out that way.

 

[m-35tom]

why would you want a larger transmission??

 

[73m819]

With a larger trans, will the front drive shaft clear, will also make for a very lonnnnng drive shaft, what will you do for the front winch pto,

 

[m-35tom]

i still want to know why. adding od gears would be cheaper and far easier in the long run.

 

[bugwhacker]

I am installing a double over 13 speed with a .62 final behind an LDS-465.

Eaton Fuller RTOO-9513

Low reverse 12.66
High reverse 3.43
Low gear 12.10
1st gear 7.28
2nd gear 5.10
3rd gear 3.69
4th gear 2.70
Low 5th 1.97
High 5th 1.66
Low 6th 1.38
High 6th 1.16
Low 7th 1.00
High 7th .84
Low 8th .73
High 8th .62

1100 ft/lbs TQ.
32.10 inches long
660 Lbs

1.) Hydraulic air assisted clutch.
2.) Far better gearing splits that are accessable with the flick of a switch on the shifter instead of reaching to the floor to split the transfer case.
3.) Unsynchronized transmision allows speed shifting with no clutch for much less clutch use.
4.) Clutch brake for easily shifting into low gears and reverse while stopped.

I am hoping to use a rear driveshaft for the front if it works out. Then have a spud shaft made between the transmission and transfer case using the same U-joints as the rear shaft so all my driveshafts have the same U-joints so I can carry less spares.

The winch will most likely become a hydro setup which will work out fine because I want a rear underbody winch set-up.

My project - http://www.steelsoldiers.com/deuce/91064-deuce-d600-dodge-crew-cab-camper-build.html

 

[m-35tom]

save yourself a lot of work and just put a V8 in. the lds won't have enough power for .62 OD. the V8 will be shorter and you won't have to move the transfer.

 

[bugwhacker]

There are other reasons for the swap, keeping the multi-fuel is a must for me.

I am also going over to the 11R22.5 tire size after spending some time down in mexico and south america because that is what is running on all the buses and market trucks down there - no 20 inch tires to be found even when I asked in the tire shops.

Tire I have with this setup-

11R20 g177 tire 43.7 + 6.72 rear end + .62 final transmission ratio @2000 RPM = 62.4 MPH
11R20 g177 tire 43.7 + 6.72 rear end + .73 final transmission ratio @2000 RPM = 53 MPH

Tire I am going to have-

11R22.5 g177 tire 42.3 + 6.72 rear end + .62 final transmission ratio @2000 RPM = 60.4 MPH
11R22.5 g177 tire 42.3 + 6.72 rear end + .73 final transmission ratio @2000 RPM = 51.3 MPH

If I wind my motor out to 2400 rpm with these tires and stay in 8Low (.73) I get this -

11R22.5 g177 tire 42.3 + 6.72 rear end + .73 final transmission ratio @2400 RPM = 61.6 MPH

or

11R20 g177 tire 43.7 + 6.72 rear end + .73 final transmission ratio @2400 RPM = 63.6 MPH

If I wind my motor out to 2400 rpm with these tires and stay in 8Hiw (.62) I get this -

11R22.5 g177 tire 42.3 + 6.72 rear end + .62 final transmission ratio @2400 RPM = 72.5 MPH

or

11R20 g177 tire 43.7 + 6.72 rear end + .62 final transmission ratio @2400 RPM = 74.9 MPH

Your tire and setup I think-

14.5R20XL tire 44 + 6.72 rear end + .69 final transmission ratio @2000 RPM = 56.5 MPH
14.5R20XL tire 44 + 6.72 rear end + .69 final transmission ratio @2400 RPM = 67.8 MPH

All that being said with the 11R22.5 tire I want to use I will run in 8Lo @2000 Rpm and cruise about 50 MPH for good fuel economy or run it up to 2400 and go about 60 MPH and if I really have to I can shift to 8Hi and floor it and it might make it up to a little over 70 but will definatly go at least 65.

 

[gringeltaube]

.....Eaton Fuller RTOO-9513.......32.10 inches long........
I am hoping to use a rear driveshaft for the front if it works out...

Original transm. is almost 22" from SAE#3 mounting surface to face of companion flange.
Now the driveshafts, measured C-C betw. U-joints are:
1)TC to F-R axle = 45" collapsed +4", fully extended.
2)TC to front axle = 36"+ 3"ext.

... so using the rear DS looks like an option, if you can move the T-Case back 10 inches.

Forget the intermediate DS (TC to center bearing) from the M36: it is 33.5" from C of U-joint to companion flange but has no slip joint

3) Interaxle-DS is 25.5"+ 3" but there you still have the smaller 1410 U-joints.


G.

 

[bugwhacker]

Thanks for the info gringeltaube, thats exactly the info I needed. Looks like I might get to use the rear for the front but will still need one for the tandems and from the transmission to the transfer case if I want all the U-joints to be the same. Otherwise I might be able to move the rear tandems back 10 inch and the transfer case back 10 inch and have the original shafts work untill I get some made.