DrX
May 14th, 2013, 12:44 PM
"New again" trans/converter are getting hot quickly even with a new 40K cooler on a 60* F day. 239 *F after 30 min of easy driving on level roads and it just keeps climbing. In the log the TCC rarely locks, but spends a lot of time in "App En" mode when it should be locked. Slip appears to increase during "App En" and decreases in "TCC OFF." Anytime the throttle backs off slightly either by the pedal or cruise control "TCC OFF" is triggered. The builder has setup the trans for full time max pressure and bumped it up to around 215 psi this time round according to my gauge. The converter was supplied by the trans builder.
The trans and converter have already been gone over by their builders as I returned them due to the heat issue, the amount of TCC slip I was logging under throttle and the "looseness" of the converter.
What is causing the heat that I am still seeing?
Why is the TCC not locking now? It was before I sent it back, but was slipping a lot at anything over 30% throttle and the converter was not stalling as it should when unlocked (e.g. 2300 RPM of slip at 5500 RPM engine speed). The spec'd stall speed was "as tight as possible" or around 2500 RPM. This is an 11" converter.
Trans issue? Converter issue? Sensor issue? Tune issue? or a combination?
The trans and converter have already been gone over by their builders as I returned them due to the heat issue, the amount of TCC slip I was logging under throttle and the "looseness" of the converter.
What is causing the heat that I am still seeing?
Why is the TCC not locking now? It was before I sent it back, but was slipping a lot at anything over 30% throttle and the converter was not stalling as it should when unlocked (e.g. 2300 RPM of slip at 5500 RPM engine speed). The spec'd stall speed was "as tight as possible" or around 2500 RPM. This is an 11" converter.
Trans issue? Converter issue? Sensor issue? Tune issue? or a combination?