Transmission Upgrade For GMC 4106

[TomC]

Cummins still makes the VT903 for the Bradley tank. They have installed electronic common rail fuel injection and it now puts out 700hp and 1500lb/ft torque. Course, the military only has a 2,000hr life expectancy requirement on their engines too. Actually-2,000hours would be around 100,000 miles-so that would work for the vast majority of us. Still would not run a VT903. The new ISX12 at 500hp and 1650lb/ft torque (RV rating) is far superior.  Good Luck, TomC

[Barn Owl]

Contact Bill Gerrie (I see him Posting alot on BNO), he can tell you all about how to take a V731 to a v730. Not that bad from what I have been told. I agree with many here, find the 6v92ta/v730 setup. Makes a great upgrade, and a hill climber like none other.

[uncle ned]

If you are in Ashville. Just run down to Mills River and see Gene Russell. That will be the end of your troubles.

He works wonders with old gm buses.

ned sanders

[MysteryBus]

Thanks everyone for your input. I wanted to change the trans. for my wife mostly, but with the no power steering she can a bit of a beast, another project i'm looking at (PWR Steering). The mousetrap clutch sounds interesting, would really like to get the 6v92 just don't know if i can afford that right now.  I guess I will mow over these ideas and figure out the best option.

-Jay MysteryBus

[Utahclaimjumper]

 A "moustrap" is not a clutch,, its a spring loaded overcenter device that assistes in releasing the clutch when the clutch pedal is depressed.. There are also air assist mechanisms to accomplish the same results.. The most popular power steering system for the 4106 is the Sheppard intracal system usually robbed from later model coaches,, it makes the 06 steer like a caddie.>>>Dan

[gus]

As Utah says, get a Sheppard. The factory original hyd assist systems do nothing while cruising on straight highways and will tire you out after a long day on the road.

No question though, that they are a great help in low speed maneuvering. I would never want a straight manual, life is too short!