4L60E vibration
4L60E vibration I have a Performabuilt Stage 2 4l60e LS1 that was installed 11/17/2014. Less than 1000k on it and a few track passes.
Car was tuned back in April and it's been running fine but just recently it started shaking bad when it shifts into OD. Doesn't matter if it's city at 55mph or highway, as soon as it shifts into OD, it shakes bad. Is 4th gear bad or is this a converter issue? I didn't take it past 75mph because it gets worse while in 4th as you go from 55mph to 75mph. I had it up to 6500 rpms in 3rd and it didn't shake. As soon as it goes into 4th even at low rpm, it gets bad. Doesn't happen in N or any other gear, only OD.
Car was tuned back in April and it's been running fine but just recently it started shaking bad when it shifts into OD. Doesn't matter if it's city at 55mph or highway, as soon as it shifts into OD, it shakes bad. Is 4th gear bad or is this a converter issue? I didn't take it past 75mph because it gets worse while in 4th as you go from 55mph to 75mph. I had it up to 6500 rpms in 3rd and it didn't shake. As soon as it goes into 4th even at low rpm, it gets bad. Doesn't happen in N or any other gear, only OD.
When pressing on the brake to unlock the converter, the shudder goes away.
I would think a bad TCC solenoid would throw a code? As I understand it, there is the TCC apply solenoid and the TCC PWM solenoid? How do I futher diagnose if it's the solenoid bad or the converter itself that is bad, or the lockup clutch?
How can I use HP tuners to determine the following? Which PIDs do I need?
- engine misfires during lockup
- engine RPM and trans TIS equal during lockup
- TCCSLIP during lockup
I would think a bad TCC solenoid would throw a code? As I understand it, there is the TCC apply solenoid and the TCC PWM solenoid? How do I futher diagnose if it's the solenoid bad or the converter itself that is bad, or the lockup clutch?
How can I use HP tuners to determine the following? Which PIDs do I need?
- engine misfires during lockup
- engine RPM and trans TIS equal during lockup
- TCCSLIP during lockup
Last edited by 5.7stroker; Oct 7, 2018 at 07:22 PM.
I believe it was 96% and 55% but I will double check. I don't think it's anything in the tune causing the issue. It was fine for 6 months on it's current tune and the tune hasn't changed
TECH Senior Member
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From: So.Cal.
Also do this: drive in 3rd gear at sufficient speed, you should observe TCC shudder here also.
Sounds like the TCC itself is slipping/shuddering (the clutch inside the converter)... something is wrong with the TCC's friction surface
Check condition of fluid, see if there are any friction specs in it.
edit: typo (ughh, autocorrection)
Sounds like the TCC itself is slipping/shuddering (the clutch inside the converter)... something is wrong with the TCC's friction surface
Check condition of fluid, see if there are any friction specs in it.
edit: typo (ughh, autocorrection)
Last edited by joecar; Oct 11, 2018 at 12:34 PM.
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From: Iowa
Also do this: drive in 3rd gear at sufficient speed, you should observe TCC shudder here also.
Sounds like the TCC itself is slipping/shuddering (the clutch inside the converter)... something is wrong with the TCC's friction circuit.
Check condition of fluid, see if there are any friction specs in it.
Sounds like the TCC itself is slipping/shuddering (the clutch inside the converter)... something is wrong with the TCC's friction circuit.
Check condition of fluid, see if there are any friction specs in it.
Easiest to use a scan tool or hptuners and command lockup with full TCC duty cycle
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Verdad Gallardo Also do this: drive in 3rd gear at sufficient speed, you should observe TCC shudder here also.
Sounds like the TCC itself is slipping/shuddering (the clutch inside the converter)... something is wrong with the TCC's friction circuit.
Check condition of fluid, see if there are any friction specs in it.
Sounds like the TCC itself is slipping/shuddering (the clutch inside the converter)... something is wrong with the TCC's friction circuit.
Check condition of fluid, see if there are any friction specs in it.