4106 VH to V730 drive shaft length

[Darkspeed]

Hello, I have removed the 6V71 + VH trans from my 4106 and I am getting ready to install a fresh 6V92 + V730.

The V730 looks like it protrudes farther into the rear of the bus than the VH did and I am starting to wonder if the shaft that connects the V730 to the diff will now be too long.

I know it slides on its splines to adjust for angle. Anyone know if I need a shorter shaft for this conversion?

Thank you
Todd

[luvrbus]

I remember it needs to be shorten by 3 or 4 inches I forgot how much exactly

[Utahclaimjumper]

I would not worry about it, there have been many mods of this sort done,(example)  I installed a VS2-8 behind an 8V71 in my 4106, the driveshaft was shortened to 17 inches overall with no harmful affects. That driveshaft is still pushing that bus 18 years later.>>>Dan

[Darkspeed]

Ok I will cut it down and weld it.

Thank you,
Todd

[Barn Owl]

You are going to LOVE that setup! Easily leaves everyone else in the dust and you get decent fuel mileage as a plus. Twelve thousand foot mountain passes get crossed as if you are running at sea level. I did a eight thousand mile trip with "Wheezy" in '09. I will be doing a 8.5K trip this fall with my father in his bus that has the 6v92 w/n95s. Very, very excited I am.

[Barn Owl]

For the guest that read these treads:

4106 = 35' lightweight aluminum bus

6v92T = great power vs the 8v71

4106 + 6v92 = lots of get up and go

[Utahclaimjumper]

I would leave the cutting and welding to a professional, the knuckles have to be timed correctly and the shaft rebalanced.>>>Dan

[luvrbus]

I bet this guy has done a drive shaft before it is not heart surgery   

[Utahclaimjumper]

If its done wrong or poorly, you will think it is.>>>D

[luvrbus]

They are kinda of hard to screw up if one uses a little common sense these little 29 dollars lasers like you buy in HD or Lowes make it a snap nowadays beats the hell out of the old school square and string 

good luck

[chessie4905]

my 4905 with v730 driveshaft is 22 1/4 inches flange to flange with air bags down.

[TomC]

Going from 210hp and 590lb/ft torque (60 injectors) to 350hp and 1000lb/ft torque-I think he'll feel a bit of difference. Have the drive shaft shortened by a drive line shop. The one thing you cannot do is to balance the shaft. And with the overdrive the trans has, that shaft can be turning over 2,600 rpm at 2,300 rpm engine speed. It is relatively cheap to have the shaft shortened professionally-and you'll be pleased by the out come. Good Luck, TomC

[luvrbus]

Most drive shaft shops just spin the shaft from 300 to 1000 rpm, millions of drive shaft out there running with out be so called balance weights  

Just to show you how important balancing is I saw a pallet of brake drums at Freightliner here all the weights were welded on in the very same spot on each drum, we all do our way but I will shorten one in a minute or the owner can take it to a shop most say cut it