Vibrations when lockup occurs???

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Jan 21, 2010 | 11:24 PM

#21

99w69kitt

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Quote:

Originally Posted by SSmoken

heres what my converter looked like after i took it out. i was having the shuddering issues too.

could you feel it hold back while accelerating and when it locks up it gets worse or is it just in lockup???

Jan 22, 2010 | 06:16 AM

#22

DannoWS6

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From: Central MA

Quote:

Originally Posted by SSmoken

heres what my converter looked like after i took it out. i was having the shuddering issues too.

What brand converter is that?

Jan 23, 2010 | 07:59 PM

#23

C_Rules

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From: NYC

Quote:

Originally Posted by jimmyblue

Look at a scan and see if TCC slip RPM is nonzero
but TCC is applied, when the vibe is going on. That
will tell you where to go.

i noticed that when TCC is enables im getting negative slip rpm values. what would that indicate?

Jan 25, 2010 | 12:18 PM

#24

C_Rules

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From: NYC

any thoughts on the above??

Jan 26, 2010 | 09:13 AM

#25

jimmyblue

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From: East Central Florida

That says you're decelerating, I guess. Which doesn't
make a lot of sense. Are both values reasonable-
appearing (engine RPM, input shaft RPM) at the time?

Jan 26, 2010 | 06:54 PM

#26

C_Rules

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From: NYC

it happens when im cruising on the highway with slight acceleration and deceleration. the engine rpm looks fine don't think datamaster show the input shaft rpm.

Jan 26, 2010 | 07:07 PM

#27

C_Rules

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From: NYC

also how much line pressure should I have while cruising around?

Jan 27, 2010 | 10:58 AM

#28

jimmyblue

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From: East Central Florida

You don't really get a choice about commanded line%,
although some LS1 OSes in HPTuners are showing me
a General Pressure tab where you can change the
locked-TCC line adder. That comes down to the software
you have, I expect. LT1s, I don't know nuthin'.

Now this built 4L60E - vac mod or still electric PCS?
Jamming the TCC PWM value to 99% in software, or
hardwire the TCC PWM line high, or taking whatever
the PCM thinks is best for economy?

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Jan 27, 2010 | 12:18 PM

#29

C_Rules

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From: NYC

Quote:

Originally Posted by jimmyblue

Now this built 4L60E - vac mod or still electric PCS?
Jamming the TCC PWM value to 99% in software, or
hardwire the TCC PWM line high, or taking whatever
the PCM thinks is best for economy?

Don't know what PCS stands for. I'm guessing something control solenoid? I'd have to see what tunercat tables would be equivalent to those TCC PWM ones you mentioned.

**edit did some research and my car still has the electric pcs.

Last edited by C_Rules; Jan 27, 2010 at 01:00 PM.

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