CalG

From the reference link there is suggested a feature that might be part of the Bosch transmission controllers in the 5HP24a transmissions.

Any confirmation that this design feature is, or is not present?

Can the line pressure be "improved" by this feature if present, or by some other work around to accomodate shift times?

Other comments?

An excerpt from the text:

qoute:
The pressure control solenoid (PCS) is used by the PCM to control what is known as "line pressure" inside of the transmission. The PCM controls the PCS based on data received from the various transmission inputs. The PCM controls the amount of amperage to the PCS. The range of that amperage is .1 amps to 1.1 amps. The higher the amperage, the lower the line pressure. Conversely, the lower the amperage supplied to the PSC, the higher the line pressure. The PCM controls line pressure with the PCS based on inputs such as engine load, TPS reading, MAF or MAP sensor, engine speed or VSS signal and RPM signal. The PCM is also able to compare desired shift times to actual shift times and adjust the PCS current accordingly. The PCM can maintain shift quality over the life of the vehicle by adjusting PCS amperage to control shift times at "new" vehicle levels. If the PCS control signal is lost, the line pressure goes to maximum to prevent internal transmission damage.

end or quote<ul><li><a href="http://co-5.college-online.com/sumner_huckaby/electricaltran.001.doc">http://co-5.college-online.com/sumner_huckaby/electricaltran.001.doc</a</li></ul>

tozoM8

Good reading material.