4-5 Shift?

LaVa121 · 09-27-2020, 05:12 PM

I was at the track last weekend with the car and I have a 3200 FTI converter. On the 4-5 shift, it sounds like the rmps are all over the place right before the traps. I've heard others have had issues with a 4-5 shift with aftermarket converters. Is this true? Going to get a log the next time I'm out to send to my tuner.

Joshinator99 · 09-27-2020, 07:09 PM

Have you tuned the TCM? Adjustments in line pressure can be done based on TCC slippage vs commanded. The pressure gets ramped up harder the more slippage from commanded occurs.

LaVa121 · 09-27-2020, 07:28 PM

Quote:

Originally Posted by Joshinator99

Have you tuned the TCM? Adjustments in line pressure can be done based on TCC slippage vs commanded. The pressure gets ramped up harder the more slippage from commanded occurs.

Yes, I've had the TCM tuned. car launches great and every shift after is great. It's the 4-5 the converter feels all over the place.

Joshinator99 · 09-27-2020, 09:32 PM

Quote:

Originally Posted by LaVa121

Yes, I've had the TCM tuned. car launches great and every shift after is great. It's the 4-5 the converter feels all over the place.

I’m assuming your tuner will want you to datalog it and send it to him. Feel free to post it up here too and we can check it out.

Joshinator99 · 10-04-2020, 06:52 PM

Just wondering how you made out on this?

09-27-2020, 05:12 PM	#1
LaVa121 OnThreeSS Drives: 2016 Camaro 2SS Join Date: Nov 2016 Location: PA Posts: 2 View My Garage	4-5 Shift? I was at the track last weekend with the car and I have a 3200 FTI converter. On the 4-5 shift, it sounds like the rmps are all over the place right before the traps. I've heard others have had issues with a 4-5 shift with aftermarket converters. Is this true? Going to get a log the next time I'm out to send to my tuner.

09-27-2020, 07:09 PM	#2
Joshinator99 Drives: 2017 Camaro 2SS A8 Join Date: Aug 2018 Location: Petersham MA Posts: 4,749	Have you tuned the TCM? Adjustments in line pressure can be done based on TCC slippage vs commanded. The pressure gets ramped up harder the more slippage from commanded occurs. __________________ 2017 Chevy Camaro 2SS A8 Whipple 3.0, Mast Black Label heads, Fore triple in-tank pumps, 112mm TB, LPE +52% injectors, LPE BB HPFP, 15” conversion *1059 WHP/944 WTQ, 9.48@150*

10-04-2020, 06:52 PM	#5
Joshinator99 Drives: 2017 Camaro 2SS A8 Join Date: Aug 2018 Location: Petersham MA Posts: 4,749	Just wondering how you made out on this? __________________ 2017 Chevy Camaro 2SS A8 Whipple 3.0, Mast Black Label heads, Fore triple in-tank pumps, 112mm TB, LPE +52% injectors, LPE BB HPFP, 15” conversion *1059 WHP/944 WTQ, 9.48@150*

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