Loud bang when shifting into 2nd under aggressive acceleration - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

GeorgeM · 09-03-2016, 07:41 PM

Help! Has anyone experienced a loud "bang" from underneath the rear seat of the car when aggressively shifting from 1st to 2nd? Run 1st up to about 6,000 and shift into 2nd and bang, sounds like someone hit the underside of the backseat of the car with a hammer! It just started happening (2010 SS with only 21,000 mi).

No other issues like clunking from a bad U-joint or anything and the car runs ok otherwise. Also happens if I do a heavy downshift, . . . BANG!

Anybody have any ideas or experienced this?

Thanks,

Ledzepx · 09-04-2016, 12:49 AM

Might be the drive shaft. Its a two piece. Also better check your trans mount. Make sure it disnt come loose. There somthing going on if your shifting like that.

frankwjr · 09-04-2016, 08:30 AM

Quote:

Originally Posted by Ledzepx

Might be the drive shaft. Its a two piece. Also better check your trans mount. Make sure it disnt come loose. There somthing going on if your shifting like that.

+1 get under the car and check the center drive shaft bearing mount bolts. I have heard stories about these coming loose....also check the front and back drive shaft bolts...

Any work done on the car???

F. Weller

BTW - Until you figure this out, no more 6k shifts bro....lol...unless you got lots of $$$$ and in that case send me some!!!

Jrichards73 · 09-04-2016, 06:14 PM

Loose or broken differential mounting bolt will make a loud bang as well. The broken driveshaft bolt was a constant bang bang bang .... sound. The bad diff bolt would make noise engaging reverse as well, 1st bang, reverse bang....

derieu · 05-23-2017, 09:19 AM

Any update to this issue?

derieu · 06-01-2017, 11:35 AM

Bump

Rock-It Man · 06-01-2017, 05:20 PM

Your car has a guibo, not a U-joint.

https://en.wikipedia.org/wiki/Giubo

Sooner or later, it will get loose and the bolts that go through it will bend.

But I see your car is a 2016. So maybe take it easy on the tranny until you figure it out. What happens if you double clutch between gears? This could provide a clue.

09-03-2016, 07:41 PM	#1
GeorgeM Drives: 2016 2SS, Yellowjacket, A8 Join Date: Oct 2009 Location: Pembroke Pines, FL Posts: 133	Loud bang when shifting into 2nd under aggressive acceleration Help! Has anyone experienced a loud "bang" from underneath the rear seat of the car when aggressively shifting from 1st to 2nd? Run 1st up to about 6,000 and shift into 2nd and bang, sounds like someone hit the underside of the backseat of the car with a hammer! It just started happening (2010 SS with only 21,000 mi). No other issues like clunking from a bad U-joint or anything and the car runs ok otherwise. Also happens if I do a heavy downshift, . . . BANG! Anybody have any ideas or experienced this? Thanks,

09-04-2016, 12:49 AM	#2
Ledzepx Drives: 2010 2SS Camaro 6sp. Join Date: Jan 2012 Location: South Jersey Posts: 639	Might be the drive shaft. Its a two piece. Also better check your trans mount. Make sure it disnt come loose. There somthing going on if your shifting like that. __________________ www.rsconversions.com

09-04-2016, 06:14 PM	#4
Jrichards73 Drives: 2011 2SS/RS Victory Red Join Date: Aug 2011 Location: Virginia Posts: 921	Loose or broken differential mounting bolt will make a loud bang as well. The broken driveshaft bolt was a constant bang bang bang .... sound. The bad diff bolt would make noise engaging reverse as well, 1st bang, reverse bang.... __________________ Updates: BTR Stage 2 VVT Cam Kit w/Smith Brothers Trunnions, Fluidampr, RX catch can, B&M Trans pan mod, Kooks Black Headers, Borla S-tunes, Eibach Multi-Pro-R2 coilovers and Swaybars, BMR Full Bushing kit with Toe and Trailing arms, RB Rotors w/EBC Pads, GForce 1400 Axles (now on order). AVH-X5800BHS in Scosche GM5201AB.

05-23-2017, 09:19 AM	#5
derieu Engineer Drives: 2014 Camaro 2SS RS 1LE Join Date: Jun 2015 Location: SE Michigan Posts: 230	Any update to this issue?

06-01-2017, 11:35 AM	#6
derieu Engineer Drives: 2014 Camaro 2SS RS 1LE Join Date: Jun 2015 Location: SE Michigan Posts: 230	Bump

06-01-2017, 05:20 PM	#7
Rock-It Man 376 cubic inches of fun Drives: 2023 Camaro ZL1 A10 Join Date: Jul 2010 Location: MA Posts: 4,027 View My Garage	Your car has a guibo, not a U-joint. https://en.wikipedia.org/wiki/Giubo Sooner or later, it will get loose and the bolts that go through it will bend. But I see your car is a 2016. So maybe take it easy on the tranny until you figure it out. What happens if you double clutch between gears? This could provide a clue.