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4l60e will not shift 3th at WOT

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Old Jul 16, 2012 | 11:45 AM
  #1  
lscorvet's Avatar
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From: SC 29069 Lamar and CA Mission Viejo 92691
Question 4l60e will not shift 3th at WOT

It is 4l60e -99 with Raybestos Z 3-4 pack, corvette servo, EZ TCU trans control.

It will not shift third at WOT but when cruising everything is well and smooth.

Can it be some solenoid, force motor or something else issue?

I tried change shift point: 5000rpm and 4500rpm and 6000rpm with out result.

It is behind LSx 416 appr 500hp.
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Old Jul 16, 2012 | 04:25 PM
  #2  
dans94z28's Avatar
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From: crofton md
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slipping trans. Mine is getting stuck on the rev limiter at wot and wont shift wither. Just got off the phone with the trans guy and thats what he said is going on in mine.
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Old Jul 16, 2012 | 11:25 PM
  #3  
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From: SC 29069 Lamar and CA Mission Viejo 92691
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I got ET 11,6/122 with that trans. On the strip third gear was on and off awhile and after that forth gear was in.
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Old Jul 18, 2012 | 03:40 PM
  #4  
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From: East Central Florida
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You do not mention MPH. MPH has to be satisfied. Make sure your
part throttle, 96% column and your WOT shift MPH are consistent
just for luck.

Scan trans current gear and the input, output shaft RPM. If current
gear doesn't change then it's a psychological problem in the PCM.
If current gear changes and input shaft RPM doesn't, then look to
the electrical / hydraulics in the trans.
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