new built trans problem???
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Teching In
Joined: Dec 2006
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From: michigan
new built trans problem??? bought a new built 4l60e and 3200 vig stall, wont go into overdrive at wot...
hitting the rev at 6200 at about 114 and wont shift??? 373 gears/runs at 2750 rpms at 55mph in overdrive... any answers guys thanks
hitting the rev at 6200 at about 114 and wont shift??? 373 gears/runs at 2750 rpms at 55mph in overdrive... any answers guys thanks
Well first has your car been tuned to allow WOT 4th shift , Many cars with the stock tune cannot make that shift as its disallowed in tuning , First thing to do short of looking at the tune is to look at the scanner data stream and see if its being comanded to make the shift, And note you must like driving really fast lol
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Thread Starter
Teching In
Joined: Dec 2006
Posts: 35
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From: michigan
Originally Posted by performabuilt
Well first has your car been tuned to allow WOT 4th shift , Many cars with the stock tune cannot make that shift as its disallowed in tuning , First thing to do short of looking at the tune is to look at the scanner data stream and see if its being comanded to make the shift, And note you must like driving really fast lol
I woundnt know what to tell you then , The trans has no choice but to do what its told. if its being comanded and not happening but will happen under light throttle then it must be slipping , But even that should be noticable, and feel like slipping , But if lighter throttle shift feels good it would seem very unlikley. The 4l60e Has no choice but to do what its told or burn or break something trying, There is no shift fail safe built in hydraulically.
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not if it shifts normally into fouth at moderate throttle that means the vavle body and servo assemblies are working and they dont know throttle position like I said they just do what they are told , Like i said there ae only two options either its in fact not being comanded to shift to fourth , Or the 2-4 band is slipping like crazy under the power, But then I would imagine it would feel really sloppy at light throttle also
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Thats why I doubt its being comanded, perhaps hey mean that there telling the pcm to comand it , Not that they are actually logging the PCM comanding it. Just bcause you tell the PCM to do something does not always mean it will
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