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Trans not shifting right after cam

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Old 12-20-2010, 08:57 AM
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Default Trans not shifting right after cam

I have a built 4l60e that has been good to me and has about 10k on. It's a monster in a box rebuilt kit good to 550 hp or so.

Anyways, before the cam, no problems, not even a hint it is bad. After the ms4 went in, the trans will shift fine till 3rd, acts like slipping to about 3k or so. Fluid is fine. And since the cam, it's been babied since it's gotta be broken in. I'm hoping it ls maybe a shift solenoid, or something tune related.

I'm stumped and pissed at the same time, any suggestions?


Thanks
Old 12-20-2010, 10:23 AM
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Presuming it was tuned, maybe the airflow calculated
is hokey low and starving line pressure? Look at force
motor current or commanded line% while it's misbehaving.
Look at calculated Delivered Torque - Trans PID.

A cam swap ought not change a solenoid's behavior and
coincidence is the last thing to suspect.
Old 12-20-2010, 10:31 AM
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The car was loaded a tune form a 02 z with the exact mods as i now have. I did add a fast intake a tb to it.. but ill check that.. thanks
Old 12-20-2010, 05:16 PM
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Originally Posted by Sarge91
I have a built 4l60e that has been good to me and has about 10k on. It's a monster in a box rebuilt kit good to 550 hp or so.

Anyways, before the cam, no problems, not even a hint it is bad. After the ms4 went in, the trans will shift fine till 3rd, acts like slipping to about 3k or so. Fluid is fine. And since the cam, it's been babied since it's gotta be broken in. I'm hoping it ls maybe a shift solenoid, or something tune related.

I'm stumped and pissed at the same time, any suggestions?


Thanks
That's funny cuz I just did a TSP Torquer V2 cam swap in my car and it's doing the same exact thing today on the dyno. Then on my way home on the highway, it was doing that at 70mph but inbetween 2k - 2500rpm.
Old 12-23-2010, 07:24 AM
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I think its the torque mgmt tables and trans tables. Make a post on the tunning section. I have heard this many times.




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