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post #1 of (permalink) Old 01-26-2006, 05:23 PM Thread Starter
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5.9 tranny

My buddy just got an 06 3500 with the cummins 6 speed. I think they put a new trans starting wiht o5, not the nv5600. Anyone know anyhting about it? Gear ratios strength vs the old one? thanks
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post #2 of (permalink) Old 01-26-2006, 08:59 PM
 
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Re: 5.9 tranny

<font face="Comic Sans MS">The new transmission is a Mercedes Benz G-56 6 speed transmission. It has a dual mass flywheel and the ratios are as follows:
Type:
Six-speed manual overdrive
Model: G56
Gear Ratios:
First 6.29:1;
Second 3.48:1;
Third 2.10:1;
Fourth 1.38:1;
Fifth 1.00:1;
Sixth 0.79:1;
Reverse 5.74:1
Taken from http://www.4wheeloffroad.com/brandpa.../131_0411_pow/ which should be the same for the 5.9L Cummins as for the gas engine heavy duty pickups.

It's only offered with 3.73:1 differential gearing, which gives a final drive ratio approximately equal to the NV5600 with 4.10's.

As for strength and durability it's too early to tell. I have an earlier 2005 with the NV5600 and I really like it, but some with the G56 have claimed it shifts smoother than the NV5600. I haven't driven the G56, so I've got no personal experience with it. The TDR has plenty of information about this transmission and is a good place to watch for durability issues.</font>
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post #3 of (permalink) Old 01-28-2006, 02:01 PM Thread Starter
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Re: 5.9 tranny

Thanks for the info. The tranny shifts pretty smooth, as long as it holds up thats the important thing.
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