M1031 driveshaft length?

[Mark3395]

Well, somebody forlifted the contact truck I picked up and the driveshaft is bent. A fellow MVPA member in town had the same problem and had his driveshaft repaired with a new tube.

My question is: how long is the driveshaft? I'd like to have the repair made, but verify the length is correct.

Any body had luck with such an operation?

 

[dependable]

I have bought a couple of 1008's with bent shafts. Sent them to drive shaft jobber and they rebuilt them.

 

[Mark3395]

Thanks. That's reassuring. Sure look forward to getting the truck running. Might need it to service a truck needing repair.

 

[319]

Take the shaft in and have it rebuilt, that's the best solution.

And, don't you know you're supposed to post pictures of your new ride?

 

[Cucvnut]

my M1008's drive shaft is 58 inches from center of one u joint to the other u joint. if you have the NP205 is might be a diff lenght

 

[Mark3395]

Per instructions from the machine shop we inserted the driveshaft fully into the tranny, backed it out an inch, then measured estimated centers of u joints. Came up with 57 1/8.

Don't know what tranny I have... it doesn't have a pto.

Is the 1008 shaft the same as the 1031?

 

[Cucvnut]

since its the same length you might have a NP208 transfercase same as my M1008. so you might have the same set up i have.

 

[acmunro]

Mark3395 - I'm thinking if you are talking about the truck you just got it has the turbo 400 transmission and the NP205 transfer case. In this case your NP205 doesn't have the PTO box on the side. That should not make any difference in the rear driveshaft length anyway. The NP208 is aluminum construction. The NP205 is cast iron. Also the NP205 transfer case shifter is strait up and down when the truck is in two wheel drive. The NP208 transfer case shifter is angled to the front of the cab when in two wheel drive.

I always thought the NP205 used a longer drive shaft than trucks with the NP208. I can measure both and post in a little bit.

 

[Mark3395]

Thanks much. They were going to start cutting tube today, but I'll hold the machine shop off for now. I was going to head down and lay the tube down and measure along the "side" and turn the corner... just to verify the reading my guys got.

I appreciate your help.

And thanks for the info freek.

Next issue will be getting the Wisconsin engine running to power up the generator.

mark

 

[GM72K10]

my M1008's drive shaft is 58 inches from center of one u joint to the other u joint. if you have the NP205 is might be a diff lenght

? beg to differ with you on that 58". My M1008 is more like 54" with a NP208, both my M1031 and K30 civilian are 57 3/4" longest point to longest point on the drive shafts, this is a truck with a NP205, and BOTH have the side cover for the PTO.

 

[acmunro]

My measurements are
M1031 with Turbo 400 trans NP205 transfer case 57 3/8" U joint Center T0 Center
M1008 with Turbo 400 trans NP208 transfer case 54 1/4" U joint Center to center

 

[acmunro]

I think all the NP205 transfer cases had the side cover for the PTO. I don't think his has the PTO. It has the gasoline generator.

 

[Mark3395]

Thanks everybody... this has been educational. I've passed AC's info to the machine shop and get to pick it up tomorrow morning.

Now I gotta figure how to start the Wisconsin engine. I think it'll need to be replaced.

Mark

 

[Mark3395]

GM, I don't understand your term..."Longest point to longest point on the drive shafts"

The machine shop had me seek the distance center to center of the U joint ends... with the tranny splines one inch from fully in. By our measure that came to 57 1/8. 57 3/8 is within a reasonable range.

I sure hope it works... because that's what I'm picking up in the morning. If it's wrong I'll havce the tube cut/spliced as needed.

 

[Cucvnut]

I'm taking mine in also to be rebuilt tomorrow

 

[GM72K10]

MaRK, acmunro's measurements are what I have and a little more exact, hope I didn't screw you up.

 

[Cucvnut]

i dont know why i said 58 when it is 54 sorry for the miss information lol

 

[Cucvnut]

Well its fixed the drive line shop guy hooked me up for 160 bucks he added a half and inch ( he said the yoke seemed a little short ) and new spicer u joints. ill get pictures of it tomorrow when i pick it up

 

[Mark3395]

My guys measured 57 1/8, which I figured was odd but went with it. I installed it this afternoon and so far it works fine. The truck has startlingly low mileage and the engine sounds great. My helper put half the needed ATF in the tranny so it didn't move... until I put in another gallon. Still figure it a quart low.

Engine sounds great, and it drives nice. I think the mission is accomplished.

Mark