Torque converter problems?

[Len Sabatine]

     For general principals, sniff the Tf , install fresh filter , fluid , 
check tcc Sol and
     wiring. Did someone rebuild trans and replace the converter ? We have 
seen
     "some" rebuilt converters exhibit shudder on tcc lock. Great idea to 
monitor
     line pressure too.  A GM service manual will step you through tcc shudder
     symptoms in the transmission section.
     Len

>Got a father-in-law with '92 4x2 Chev full size pickup with either a 4L60 or
>700R4 tranny & a 350...
>
>Recently it has developed a pretty nasty vibration/shudder it seems when the
>torque converter locks up under light throttle & at low RPMs...  As a side 
>note,
>my work van (92 Astro) does the same thing & has for the last couple years (I
>only put about 4-5K miles on it a year).
>
>Is this a sign that the torque converter is preparing to expire and send
>shrapnel thru the tranny or just that the ECM is getting a bad signal from
>somewhere or is in need of reprogramming for better lock up points?  Don't
>really have much experience with lock up converters & OD tranny's - have 
>always
>had TH400s or TH350s.
>
>We were contemplating disconnecting the wires for the lock up converter 
>for the
>time being to see if that would cure the problem for now.
>
>TIA for any input.  BTW, the truck has not had any programming work done 
>to it.
>
>Gabe
>
>----------------------------------------------------------------------------
>To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
>in the body of a message (not the subject) to majordomo at lists.diy-efi.org

----------------------------------------------------------------------------
To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org