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Engine/Mech : How much torque can the stock axles take
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 Message 1 of 4 in Discussion 
From: brutus  (Original Message)Sent: 9/15/2005 12:22 PM
I am planning to install a 6bt cummins motor but i wonder if the stock axles can take it since the motor produces 48 kgm (350 lbsft) torque. Does anybody know how much torque can the stock axles safely put up with????? Also can the stock gearbox take it????


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 Message 2 of 4 in Discussion 
From: MSN NicknamegreenmountainsolardotcomSent: 3/28/2006 12:59 AM
i seriously doubt the driveline will handle that torque.    also, that engine must be quite heavy.  the front suspension will be down on the pads.     i have had fantasies of a perkins engine and a 4 to 1 gear box inline for a super slow crawler but that is expensive.
 
chris
 

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 Message 3 of 4 in Discussion 
From: FudSent: 3/29/2006 2:12 AM
I don't know if it can take 350lbs of torque but the axles/diffs and the tranny can handle more than the stock motor puts out. The Aussies been putting big block v8's in their Patrols for years with stock drivetrain with little to no probs. Nissan diffs and tranny/transfers are known world wide for being extra strong.
 
The old C216 axles/diffs are a fairly low spline count. So that is one weak link. In the front diff though it uses the old tracta-joint. The tracta-joint is what you find inside your swivle hub or also known as knuckle flange. A tracta-joint is much stronger than the newer design which is cv joints. people break CV's all the time but I have never heard of any person breaking a tracta joint. In fact I would like to hear one person say they have broke on....
 
The only time I have heard of people breaking rear diffs/axles was due to operator error. You can do it in any open diff. Lift a wheel, power ends up going to the lifted wheel. Truck comes down on the spinning lifted wheel and bam...broken axle. That is pretty much what you have to do to break them.
 
Suspension sag from a heavy diesel motor? Easy fix...add more leaves to the front pack to compensate for the extra weight.
 
 

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 Message 4 of 4 in Discussion 
From: brutusSent: 4/4/2006 2:59 PM
Thanx a lot.The indian patrol do come with a deisel motor also but it is no good and it has a different gearbox(the4x4 version comes with the petrol option only), but there is a certain nissan truck used by the indian army that uses the same p40 motor but a lower geared 4 speed gearbox, with the gearbox assembly being only 3 inches longer than the patrol(it even uses the patrol transfer case).But since its first gear ratio is 7.13:1,i am thinking of what is going to happen to the axles if 350 lbs of  torque ,after going through 7.13:1 ratio of the gearbox is going to leave of the axles

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