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Old 01-31-2010, 06:04 PM   #10
01Duramax6spd
 
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Name: 01Duramax6spd
Title: ZF6 puller
Status: Not Here
Join Date: Dec 2009
Location: Neb
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Posts: 84
I know very little about the G56 or NV5600 but the ZF6 is a solid trans. I didn't have any issues with mine other than syncros till about 195K and I sledpull a fair bit and make a living towing 25,000-30,000lbs so it's seen the abuse. I snapped a 6th gear syncro assembly at 195K and rebuilt the whole trans. I'm at 207K now and it's apart again for an input and shift forks. I'm in that 580-625wrhp range.
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01 2500HD Duramax/ZF6 Lots of mods,2.6" class pull truck.
03 3500 DRW Duramax/ZF6 EFI,deerproof bumper,
19.5"s
03 3500 DRW Duramax/Ally crew cab
04 3500 DRW Duramax/Ally C&C
06 4500 4x4 Duramax/Ally Monroe Conversion,tuned with EFI
67/01 K20/2500HD Duramax/ZF6
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