Transmission Bang - Page 2

SuperBlackTruck · 01-21-2013, 07:54 AM

Sounds like another just live with it, or live without the factory warranty.

**KensAuto** · 01-21-2013, 08:11 AM

It will soften up around 5000 miles after the trans breaks in and part of it is the constant 'learning' the trans goes thru.....sometimes it gets confused as to what gear it wants and once the discs wear in (burnish) it won't jerk as hard on those once-in-a-while wierd shifts.

**jwcgmc1985** · 01-21-2013, 08:16 AM

you guys felt ok doing the trans learn on the H&S?

meaning the last step of going up to 80 mph with WOT?? ON HOT!

i dont have to do it right then and there once i tune would i, i can wait untill i get to an open stretch and plug the XRT back in and do the tranny stuff right?

SuperBlackTruck · 01-21-2013, 08:32 AM

I have about 10.5k on it now, so I guess thats not too far from 5k. But from what I am hearing nothing to worry about.

**KensAuto** · 01-21-2013, 09:56 AM

Yeah i guess your's is fairly broke in by now depending on how you drive. Maybe the fact that mines tuned and I drive it pretty hard forced it to break in faster. lol

**jwcgmc1985** · 01-21-2013, 09:58 AM

i drive like a granny!

been taking it easy all this time, 16800 miles!

**KensAuto** · 01-21-2013, 10:12 AM

^^^sounds like that's about to change!

**jwcgmc1985** · 01-21-2013, 10:15 AM

dude you already know!

ktrent · 01-21-2013, 03:42 PM

Mine was perfect until 10000 miles then it started a horrible 6 to 5 downshift. Done it until 30000 when I deleted and reset the trans and its smooth as silk now.

Sent from my iPhone using AutoGuide.com App

DMAXNJ · 01-29-2013, 09:44 AM

Had same issue. drive 60mph lightly hit accelerator until truck downshifts but it bangs.. took it to chevy dealer couldnt find anything but after further investigation chevy said there was a file to re-program TCM. It wasnt in any of the dealers tsb's or anything. it was like chevy was trying to hide it or say that there wasnt a problem... anywa, long story short there is an issue and chevrolet does have a file to re-program tcm.. shifts fine now.!

01-21-2013, 08:11 AM	eBay Motors #12 (permalink)
KensAuto Duramax Lifetime Supporter Join Date: Apr 2012 Location: Casa Grande, Az Posts: 2,212	It will soften up around 5000 miles after the trans breaks in and part of it is the constant 'learning' the trans goes thru.....sometimes it gets confused as to what gear it wants and once the discs wear in (burnish) it won't jerk as hard on those once-in-a-while wierd shifts. __________________ 2012 GMC 2500 SLT 4x4 H&S minimaxx, MBRP downpipe back SS duals, Insight CTS w/backup cam, Fass HD150, PPE rear diff cover, Amsoil front to rear w/by-pass Cognito 4-6 NTBD w/idler/pitman braces, a-arms, Monster energy 18x9 w/BFG KM2s 35x12.5, Recon smoked cab lights Titan 57 gal saddle tank, linex color matched bedliner w/kevlar, Trekstep bed steps x2, RBP rail steps

01-21-2013, 08:16 AM	eBay Motors #13 (permalink)
jwcgmc1985 what matters is our plan Join Date: Jan 2012 Location: Cypress Tx Posts: 5,560	you guys felt ok doing the trans learn on the H&S? meaning the last step of going up to 80 mph with WOT?? ON HOT! i dont have to do it right then and there once i tune would i, i can wait untill i get to an open stretch and plug the XRT back in and do the tranny stuff right? __________________ Life's simple, you make choices and you don't look back White 2012 LML CCSB LTZ 4x4, all the Options. + NAV/Sunroof/Rear Sliding Glass -Dropped 7.5" RCX, Sulastics, Cognito UCA's/Supports, DUAL Stabilizer's, Nicktane Cat, Fox's, Reso Delete -S&B+Wrap+Scoop, Edge CTS, 5" Flo Pro, XRT PRO on Hot, Nfabs, Debadged, 22x9.5 Throttles on 35x12.50 Gray 2008 ECSB LT Silverado "Texas Edition", OEM 20's- Daily Driver Body Dropped Build Thread - 2001 Sierra / 2000 S10 - Lowering A Lifted Truck - Cognito Support Kit- Cognito UCA kit - How To LML Cat Adapter -Modified Dual Stabilizer Kit- Last edited by jwcgmc1985; 01-21-2013 at 08:41 AM.

01-21-2013, 09:56 AM	eBay Motors #15 (permalink)
KensAuto Duramax Lifetime Supporter Join Date: Apr 2012 Location: Casa Grande, Az Posts: 2,212	Yeah i guess your's is fairly broke in by now depending on how you drive. Maybe the fact that mines tuned and I drive it pretty hard forced it to break in faster. lol __________________ 2012 GMC 2500 SLT 4x4 H&S minimaxx, MBRP downpipe back SS duals, Insight CTS w/backup cam, Fass HD150, PPE rear diff cover, Amsoil front to rear w/by-pass Cognito 4-6 NTBD w/idler/pitman braces, a-arms, Monster energy 18x9 w/BFG KM2s 35x12.5, Recon smoked cab lights Titan 57 gal saddle tank, linex color matched bedliner w/kevlar, Trekstep bed steps x2, RBP rail steps

01-21-2013, 09:58 AM	eBay Motors #16 (permalink)
jwcgmc1985 what matters is our plan Join Date: Jan 2012 Location: Cypress Tx Posts: 5,560	i drive like a granny! been taking it easy all this time, 16800 miles! __________________ Life's simple, you make choices and you don't look back White 2012 LML CCSB LTZ 4x4, all the Options. + NAV/Sunroof/Rear Sliding Glass -Dropped 7.5" RCX, Sulastics, Cognito UCA's/Supports, DUAL Stabilizer's, Nicktane Cat, Fox's, Reso Delete -S&B+Wrap+Scoop, Edge CTS, 5" Flo Pro, XRT PRO on Hot, Nfabs, Debadged, 22x9.5 Throttles on 35x12.50 Gray 2008 ECSB LT Silverado "Texas Edition", OEM 20's- Daily Driver Body Dropped Build Thread - 2001 Sierra / 2000 S10 - Lowering A Lifted Truck - Cognito Support Kit- Cognito UCA kit - How To LML Cat Adapter -Modified Dual Stabilizer Kit-

01-21-2013, 10:12 AM	eBay Motors #17 (permalink)
KensAuto Duramax Lifetime Supporter Join Date: Apr 2012 Location: Casa Grande, Az Posts: 2,212	^^^sounds like that's about to change! __________________ 2012 GMC 2500 SLT 4x4 H&S minimaxx, MBRP downpipe back SS duals, Insight CTS w/backup cam, Fass HD150, PPE rear diff cover, Amsoil front to rear w/by-pass Cognito 4-6 NTBD w/idler/pitman braces, a-arms, Monster energy 18x9 w/BFG KM2s 35x12.5, Recon smoked cab lights Titan 57 gal saddle tank, linex color matched bedliner w/kevlar, Trekstep bed steps x2, RBP rail steps

01-21-2013, 07:54 AM	eBay Motors #11 (permalink)
SuperBlackTruck Junior Member Join Date: May 2012 Posts: 77	Sounds like another just live with it, or live without the factory warranty.

01-21-2013, 08:32 AM	eBay Motors #14 (permalink)
SuperBlackTruck Junior Member Join Date: May 2012 Posts: 77	I have about 10.5k on it now, so I guess thats not too far from 5k. But from what I am hearing nothing to worry about.

01-21-2013, 10:15 AM	eBay Motors #18 (permalink)
jwcgmc1985 what matters is our plan Join Date: Jan 2012 Location: Cypress Tx Posts: 5,560	dude you already know! __________________ Life's simple, you make choices and you don't look back White 2012 LML CCSB LTZ 4x4, all the Options. + NAV/Sunroof/Rear Sliding Glass -Dropped 7.5" RCX, Sulastics, Cognito UCA's/Supports, DUAL Stabilizer's, Nicktane Cat, Fox's, Reso Delete -S&B+Wrap+Scoop, Edge CTS, 5" Flo Pro, XRT PRO on Hot, Nfabs, Debadged, 22x9.5 Throttles on 35x12.50 Gray 2008 ECSB LT Silverado "Texas Edition", OEM 20's- Daily Driver Body Dropped Build Thread - 2001 Sierra / 2000 S10 - Lowering A Lifted Truck - Cognito Support Kit- Cognito UCA kit - How To LML Cat Adapter -Modified Dual Stabilizer Kit-

01-21-2013, 03:42 PM	eBay Motors #19 (permalink)
ktrent Junior Member Join Date: Dec 2011 Posts: 114	Mine was perfect until 10000 miles then it started a horrible 6 to 5 downshift. Done it until 30000 when I deleted and reset the trans and its smooth as silk now. Sent from my iPhone using AutoGuide.com App __________________ 2012 GMC DENALI 2500 HD H&S MINI MAXX, MBRP 4" SS EXHAUST, SB CAI, TRUCK COVERS USA ROLL COVER 2006 CHEVROLET 2500HD DURAMAX CUSTOM SUSPENSION WITH 40'S (SADDLY SOLD)

01-29-2013, 09:44 AM	eBay Motors #20 (permalink)
DMAXNJ Join Date: Apr 2012 Posts: 3	Had same issue. drive 60mph lightly hit accelerator until truck downshifts but it bangs.. took it to chevy dealer couldnt find anything but after further investigation chevy said there was a file to re-program TCM. It wasnt in any of the dealers tsb's or anything. it was like chevy was trying to hide it or say that there wasnt a problem... anywa, long story short there is an issue and chevrolet does have a file to re-program tcm.. shifts fine now.!

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