Duramax Diesels Forum Truck of the Week
Old 07-10-2018, 09:45 AM
hntngkd's Avatar
hntngkd hntngkd is offline
Join Date: Jun 2013
Location: Attica, Mi
Posts: 117

Default Broken ZF6

Ive been hearing a little bit a whine coming from the trans for about the last 3 weeks. Was planning on changing it out last saturday but it was too hot to work in the barn so i put it off and went up north anyways. Drove about 3 hours up north stayed the weekend and then came back. Sunday i ran up town to grab some food and on the way back i did a couple hard pulls in 6th gear. First one felt good slowed down a little and did a second one, right around 100mph and 70-80lbs of boost she let go. Coasted for about 2 miles and tried puting it in fifth gear it went in so i rolled a couple stop signs and was able to make it home. Got to the driveway stopped to turn in and tried puting it in 2nd and the truck didnt move at all. Put it in 4 low and then back to 5th gear and it chugged right into the driveway. Pulled the trans out monday before work and pulled it apart this morning. Found some major carnage to the counter gear and that was about it. Should have it back up and running by the weekend if i dont send this other one out to get cryo treated which im thinking i might do. This will be the third trans in the truck.

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2006 "LLY" ECLB DRW, DEAD 5/3/2015.... Alive again..... 11/30/16
Fingers cast 15.5:1, R&R rods, Callies billet crank internally balanced, Wagler AF stage 2 Cam, Main Girdle, Billet Mains, Fire ringed block,
Wagler Pushrods, Valve Springs, Ported LBZ heads
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2017 Cruze LT diesel LH7 stock
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Old 07-16-2018, 02:25 PM
fl0w3n fl0w3n is offline
Join Date: Jan 2015
Posts: 52

Just saw that on the strictly ZF6 group. That’s some carnage.
2002 LB7/ZF6 CCSB Sierra 4x4
340k miles
Stock...for now

KP D60 front, ORD leafs front/rear, Twin Stick NP205, 4.56 gearing locked rear, PSC steering/hydro assist , 37"s on H1 wheels, Titan or Aerotank replacement

SAC45% Injectors, SB SD clutch, Kennedy pump and filter heads, S&B intake, ProFab up/down pipe, manifolds, Mild Tune from Rob
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