A10 Clutches Slipping?

JSH · 09-28-2024, 12:14 PM

The car felt really odd this morning. It felt like it wasn't getting to the shift points as quickly as in the past. What PID do I look at to determine if the clutches are slipping?

This is my first A10. It's actually my first transmission where I was wondering about slipping clutches.

*Joshinator99* · 09-28-2024, 01:23 PM

Quote:

Originally Posted by JSH

The car felt really odd this morning. It felt like it wasn't getting to the shift points as quickly as in the past. What PID do I look at to determine if the clutches are slipping?

This is my first A10. It's actually my first transmission where I was wondering about slipping clutches.

Log the last completed shift time.

JSH · 09-28-2024, 06:42 PM

Quote:

Originally Posted by Joshinator99

Log the last completed shift time.

Jason is already logging that one; the time is like 0.1-0.2s, so I added time of the latest 4-5 shift. He is not seeing any slipping so perhaps I'm just paranoid but something's not right at wot.

*Joshinator99* · 09-28-2024, 07:04 PM

Quote:

Originally Posted by JSH

Jason is already logging that one; the time is like 0.1-0.2s, so I added time of the latest 4-5 shift. He is not seeing any slipping so perhaps I'm just paranoid but something's not right at wot.

Jason knows these things LOL…if he says you’re fine, you most likely are. 0.1-0.2 is perfectly fine. I was averaging around .18-.20 seconds at low to mid boost… then when I turned up the boost to about 85-90% that 4-5 shift went to 0.6 seconds…not good. I then tried full boost and the 4-5 shift went to a whopping *1.6 seconds* on what would have been a new personal best run….and then I pulled the transmission out lol…

ZL14ever · 09-29-2024, 02:57 AM

Trans oil probably needed to get to operating temp. I know when the trans temp sensor in my C7 8l90e started acting up, converter lock up felt abnormal

JSH · 09-29-2024, 12:21 PM

There's a distinct vibration today in 4th between 6000 and 7000. The only change from, say, two weeks ago when this wasn't happening is going down to the 2.75 pulley, so I'm going to replace the belt. It also does it with TC on. I've swapped upper pullies a bunch of times using this belt. At least we'll eliminate a variable.

jlaudio11 · 09-30-2024, 09:21 AM

I'm not sure how it is in your area but weather is changing here with colder mornings lately. Colder temps can make the trans take longer to heat up, throwing off shifting a little bit. They can also have an affect on the engines characteristics and thus the indicated torque its making and what the trans uses to apply clutches, converter etc.

JSH · 10-02-2024, 09:38 PM

I'm sending it to Pure.

KingLT1 · 10-03-2024, 09:42 AM

Good call...you are at the power level of when not if it fails.

JSH · 10-03-2024, 02:38 PM

Quote:

Originally Posted by KingLT1

Good call...you are at the power level of when not if it fails.

I agree. It's driveable but very unhappy in 4th at wot. It vibrates from 5000-7000 and the red shift light flashes [which also sounds like a slipping belt]. Jason looked at the data in every possible way, and we agree that there are probably clutches giving out and even if they're not, it's inevitable that they give out, so might as well just do it on my schedule.

JSH · 10-10-2024, 07:34 PM

My shop drove the car and put it on the lift and found the driveshaft rubbing the tunnel plus he says the backseat delete makes it sound worse. He doesn't believe its the transmission. So, do I send it to Pure or not?

*Joshinator99* · 10-10-2024, 08:16 PM

Quote:

Originally Posted by JSH

My shop drove the car and put it on the lift and found the driveshaft rubbing the tunnel plus he says the backseat delete makes it sound worse. He doesn't believe its the transmission. So, do I send it to Pure or not?

How is the driveshaft rubbing the tunnel…? Are you still running the OEM driveshaft?

Agree with your shop 100% about the backseat delete…made the car so much louder.

If your shift times are still good then you probably don’t need to build the transmission…yet lol

JSH · 10-10-2024, 10:33 PM

Quote:

Originally Posted by Joshinator99

How is the driveshaft rubbing the tunnel…? Are you still running the OEM driveshaft?

Yes. You?

*Joshinator99* · 10-11-2024, 06:51 AM

Quote:

Originally Posted by JSH

Yes. You?

No lol… I’m on a GForce aluminum one piece. The OEM SS driveshaft is weaker than the ZL1 DS so I snapped it a while ago.

If you’re on the OEM DS I’m just wondering how it could be rubbing in the tunnel, unless the rubber mounts are cooked.

09-28-2024, 12:14 PM	#1
JSH Drives: '20 ZLE Join Date: Jun 2020 Location: Mile High Posts: 4,147	A10 Clutches Slipping? The car felt really odd this morning. It felt like it wasn't getting to the shift points as quickly as in the past. What PID do I look at to determine if the clutches are slipping? This is my first A10. It's actually my first transmission where I was wondering about slipping clutches. __________________ 2020 ZL1LE A10. LME LT4 390 short block, CID Heads, Kong E2650, FBO. 15" conversion, Nitto 555Rii or MT ET Street R or Toyo Proxes RR. 100 octane: 1045hp/1055tq. 100 octane + Alky MAF Meth (1) 10+:

09-29-2024, 12:21 PM	#6
JSH Drives: '20 ZLE Join Date: Jun 2020 Location: Mile High Posts: 4,147	There's a distinct vibration today in 4th between 6000 and 7000. The only change from, say, two weeks ago when this wasn't happening is going down to the 2.75 pulley, so I'm going to replace the belt. It also does it with TC on. I've swapped upper pullies a bunch of times using this belt. At least we'll eliminate a variable. __________________ 2020 ZL1LE A10. LME LT4 390 short block, CID Heads, Kong E2650, FBO. 15" conversion, Nitto 555Rii or MT ET Street R or Toyo Proxes RR. 100 octane: 1045hp/1055tq. 100 octane + Alky MAF Meth (1) 10+:

09-30-2024, 09:21 AM	#7
jlaudio11 Drives: Chevy Camaro Join Date: Sep 2022 Location: IN Posts: 289	I'm not sure how it is in your area but weather is changing here with colder mornings lately. Colder temps can make the trans take longer to heat up, throwing off shifting a little bit. They can also have an affect on the engines characteristics and thus the indicated torque its making and what the trans uses to apply clutches, converter etc. __________________ '20 Camaro LT1 Twin 67/62 turbo 401(L8t) Texas speed forged piston & rod, BTR stg1 turbo cam, holley ultra lo, port injection, circle d 3600 stall, et street r’s on racestar recluse wheels. 1.33 3.75 5.75@122.98 1/8 pb 9.04@141 1/4 pb technically '94 Camaro Z28 6mt cc306 cam, 4:10's, longtubes with x pipe, otr intake

10-02-2024, 09:38 PM	#8
JSH Drives: '20 ZLE Join Date: Jun 2020 Location: Mile High Posts: 4,147	I'm sending it to Pure. __________________ 2020 ZL1LE A10. LME LT4 390 short block, CID Heads, Kong E2650, FBO. 15" conversion, Nitto 555Rii or MT ET Street R or Toyo Proxes RR. 100 octane: 1045hp/1055tq. 100 octane + Alky MAF Meth (1) 10+:

10-03-2024, 09:42 AM	#9
KingLT1 Drives: 2016 1SS NFG A8 Join Date: Aug 2017 Location: 46804 Posts: 7,560	Good call...you are at the power level of when not if it fails. __________________ 2016 NFG SS A8/Whipple 2.9/Fuel System/Flex Fuel

09-29-2024, 02:57 AM	#5
ZL14ever Drives: 2018 Camaro ZL1 A10 Join Date: Feb 2022 Location: Dubai, UAE Posts: 90	Trans oil probably needed to get to operating temp. I know when the trans temp sensor in my C7 8l90e started acting up, converter lock up felt abnormal

10-10-2024, 07:34 PM	#11
JSH Drives: '20 ZLE Join Date: Jun 2020 Location: Mile High Posts: 4,147	My shop drove the car and put it on the lift and found the driveshaft rubbing the tunnel plus he says the backseat delete makes it sound worse. He doesn't believe its the transmission. So, do I send it to Pure or not? __________________ 2020 ZL1LE A10. LME LT4 390 short block, CID Heads, Kong E2650, FBO. 15" conversion, Nitto 555Rii or MT ET Street R or Toyo Proxes RR. 100 octane: 1045hp/1055tq. 100 octane + Alky MAF Meth (1) 10+:

User Name		Remember Me?
Password