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Old 05-31-2011, 03:11 PM
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4L60E Manual Upshifts Only Hot

I have a problem with a friend's tranny. I helped him out with it.
Fresh rebuild (1995 TransAm) with all new clutches, steels, bonded pistons.
It had a Transgo shift kit already and everything put back as per Transgo instruction sheets.
After a drive around the block and stopping at the lights, it won't automatically upshift anymore.
It will upshift fine manually.

Thoughts?

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Old 05-31-2011, 04:27 PM
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when will it rain???
 
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Quote:
Originally Posted by 123pugsy
I have a problem with a friend's tranny. I helped him out with it.
Fresh rebuild (1995 TransAm) with all new clutches, steels, bonded pistons.
It had a Transgo shift kit already and everything put back as per Transgo instruction sheets.
After a drive around the block and stopping at the lights, it won't automatically upshift anymore.
It will upshift fine manually.

Thoughts?
either shift solenoids, or the pressure manifold switch.
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Old 05-31-2011, 05:01 PM
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Thanks.

Only after its warmed up?
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Old 05-31-2011, 09:34 PM
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when will it rain???
 
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Originally Posted by 123pugsy
Thanks.

Only after its warmed up?
with what your explaining to me its like its not down shifting back to low after you come to a stop, correct?
if you have any scan tool with a live data stream, you can watch the shift solenoids.
also you can watch the trans temp as well to see if it shows any problems. ( the trans temp sensor is in the pressure manifold.)
it will also show whether or not the computer is commanding a down shift back to low gear.
there are times that a electronic device can test good and work for a certain length of time, say like a car warming up to operating temp and quit working once the vehicle has gotten hot.
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Old 06-01-2011, 03:44 AM
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HOT ROD...... FROM A CHRYSLER?
 
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Thanks tnsmith.
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