Rear end Yaw/squirm on Acceleration / Deceleration Stumped... - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Z28-TX · 06-13-2021, 04:08 PM

I noticed after tire replacement (Goodyear F1) and bedding of new break pads that suddenly the rear of the car seems to side squat under acceleration and jumps back on deceleration. Very unsettling feel. Put her on jack stands and didn't see any apparent issues. Tire pressures were all within 1 PSI so not the issue.

Ideas? I'm stumped. All of this is without application of breaks. Anybody experience this before?

Thanks!

AustexaSS · 06-13-2021, 04:55 PM

Quote:

Originally Posted by Z28-TX

I noticed after tire replacement (Goodyear F1) and bedding of new break pads that suddenly the rear of the car seems to side squat under acceleration and jumps back on deceleration. Very unsettling feel. Put her on jack stands and didn't see any apparent issues. Tire pressures were all within 1 PSI so not the issue.

Ideas? I'm stumped. All of this is without application of breaks. Anybody experience this before?

Thanks!

After making sure all wheel lug nuts are torqued down correctly I would do a suspension check for loose bolts, especially sway bars. Maybe this issue:

https://www.camaro5.com/forums/showthread.php?t=494274

SS Performance · 06-13-2021, 06:07 PM

How many miles are on the car?

Z28-TX · 06-13-2021, 06:11 PM

Quote:

Originally Posted by SS Performance

How many miles are on the car?

just under 7,000 miles. About 3K are track miles probably.

Z28-TX · 06-13-2021, 06:14 PM

Quote:

Originally Posted by AustexaSS

After making sure all wheel lug nuts are torqued down correctly I would do a suspension check for loose bolts, especially sway bars. Maybe this issue:

https://www.camaro5.com/forums/showthread.php?t=494274

Thanks for the thread. Nothing felt loose when I tugged on the wheels. Yet that may not have been enough grunt to move it. Think I'll take it to a race shop to have them Nut & Bolt the whole suspension system.

BUBZ28 · 06-13-2021, 06:21 PM

Might be the tires. Which Goodyear F1's did you get? I have the Supercar 3R's and once up to temp they are good.

Gbland60 · 06-13-2021, 10:36 PM

Go to search engine on here and type ( loose suspension bolt) and see if this could be your issue. I checked mine when this came out but mine were ok.

pat_t · 06-16-2021, 06:44 AM

I had rear-passenger side inner tie-rod bolt come loose midway through a trackday which gave me scary symptoms like you describe for half a lap!

Came back into the paddock and re-tightened with alignment by eye. and then a proper shop alignment as soon as I was able to and no further issues since.

06-13-2021, 04:08 PM	#1
Z28-TX Drives: 2015 Z-28 / '13 Howe TA2 Camaro Join Date: Jul 2014 Location: San Antonio, TX Posts: 42	Rear end Yaw/squirm on Acceleration / Deceleration Stumped... I noticed after tire replacement (Goodyear F1) and bedding of new break pads that suddenly the rear of the car seems to side squat under acceleration and jumps back on deceleration. Very unsettling feel. Put her on jack stands and didn't see any apparent issues. Tire pressures were all within 1 PSI so not the issue. Ideas? I'm stumped. All of this is without application of breaks. Anybody experience this before? Thanks!

06-13-2021, 06:07 PM	#3
SS Performance Drives: 02 Camaro B4C Join Date: Nov 2016 Location: Cape May County NJ Posts: 750	How many miles are on the car? __________________ A man's garage is his castle 1969 Camaro SS 1970 Camaro SS 2002 Camaro B4C 2014 Camaro SS Dedicated Track Car 2015 Camaro 1SS 1LE 2008 HHR SS 1996 Silverado Crew Cab Long Bed Dual Rear Wheel

06-13-2021, 06:21 PM	#6
BUBZ28 Drives: '15 Z/28 #0270 Join Date: Jan 2017 Location: San Pablo, CA Posts: 85	Might be the tires. Which Goodyear F1's did you get? I have the Supercar 3R's and once up to temp they are good. __________________

06-13-2021, 10:36 PM	#7
Gbland60 Drives: 2015 z28 Black w/ac #645 Join Date: Jan 2017 Location: Southeast Texas Posts: 337 View My Garage	Loose suspension bolt Go to search engine on here and type ( loose suspension bolt) and see if this could be your issue. I checked mine when this came out but mine were ok.

06-16-2021, 06:44 AM	#8
pat_t Drives: . Join Date: Jun 2016 Location: . Posts: 589	I had rear-passenger side inner tie-rod bolt come loose midway through a trackday which gave me scary symptoms like you describe for half a lap! Came back into the paddock and re-tightened with alignment by eye. and then a proper shop alignment as soon as I was able to and no further issues since.