Hot Rod Forum : Hotrodders Bulletin Board

Hot Rod Forum : Hotrodders Bulletin Board (http://www.hotrodders.com/forum/)
-   Transmission - Rearend (http://www.hotrodders.com/forum/transmission-rearend/)
-   -   4L60E Manual Upshifts Only Hot (http://www.hotrodders.com/forum/4l60e-manual-upshifts-only-hot-199555.html)

123pugsy 05-31-2011 03:11 PM

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?

tnsmith10 05-31-2011 04:27 PM

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.

123pugsy 05-31-2011 05:01 PM

Thanks.

Only after its warmed up?

tnsmith10 05-31-2011 09:34 PM

Quote:

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.

123pugsy 06-01-2011 03:44 AM

Thanks tnsmith.


All times are GMT -6. The time now is 03:34 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.