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Exactly! I would like to hear one on the crappy G-56 (internet slander) that was installed about 5-6 years ago. I have not seen Gary post any bad things about it. I think it was used when it was installed so it must have a huge amount of miles on it by now.
I've put 430k on the G56. The average time on the 12 NV4500s was about 60k each, ranging from 7k to 130k. Unlike the NV4500s I have never been broke down on the road. My loads have remained constant. The only problem I've encountered are two input bearings started to get noisy (I thought it was the release bearings) and have had to be replaced. One of the first loads with the G56. Not that heavy, about 8000 lbs, but horrible aerodynamics. Pulled it from Billings, MT to the coal fields of WV.
A good example of aerodynamics being a bigger factor than weight when computing fuel mileage. The silo resulted in 8-9 mpg. This loaded 5er, nearly twice the weight netted 11-12 mpg.
G56's have had good results towing heavy many miles, another TDR member routinely pulls at 40K with many different G56 equiped trucks, gearing and engines. The first thing that fails is the DMF, then the SMF makes them noisey as hell, but have held up for him.
I couldn't give away the DMF that came with the trans. With a single disk clutch my SMF from SBC is plenty quiet, for sure no noisier than any other manual transmission I have owned.
Not with my SBC DD 3250, and once I get my my regen surging issue corrected, it's goes back to a single disk clutch. I prefer the NV5600 and probably will convert it at the same time I go back to a single disk clutch. My update that went wrong in 09 causing a surging issue when in regen took out my DMF clutch, not the DMF. So I need the extra holding power of the DD 3250.
I'm thinking those are engine placards, in which case it would "only" be 800k. I'm on my 2nd speedometer, so the odo is off which complicates things. I do have another speedo with 220XXX on the odo that I plan on installing when the time is right. If I go with odometer error added in it would be after about 23k more miles.