Reads code P0741

TECHNICAL SERVICE BULLETIN
Reference Number(s): 04-07-30-034A, Date of Issue: October 13, 2009
Affected Model(s):1998-2002 Cadillac Eldorado; 1998-2004 Cadillac Seville; 1999-2004 Cadillac DeVille; 2000-2003 Oldsmobile Aurora; Equipped With 4T80-E Automatic Transaxle RPO MH1
Supercedes:This Bulletin is being revised to update the Parts Information. Please discard Corporate Bulletin Number 04-07-30-034 (Section - 07 Transmission/Transaxle)

Related Ref Number(s): 04-07-30-034, 04-07-30-034A

Condition:
Some customers may comment on the SES light being illuminated and a chuggle or surge being felt when driving at higher speeds.
Technicians may observe on the Tech 2�, an excessive torque converter clutch (TCC) slip speed and DTC P0741 set as Current or in History.
Cause
This condition may be caused by seal damage that allows the TCC apply fluid to leak into the channel plate, causing excessive TCC slippage under certain operating conditions, eventually resulting in a total loss of TCC apply fluid pressure.
The TCC may have partial apply fluid pressure or no apply fluid pressure. If excessive slip speed is noted on the Tech 2� and the condition/cause cannot be corrected by using the DTC P0741 diagnostic information, then worn seals from slippage of the drive sprocket bearing inner race on the drive sprocket are indicated

Fill it when engine is hot and not running to the full mark-

Sorry, my bad fill it while engine is idling and transmission is hot-to the full mark

It has to be Hot and while engine is idling then you check the level if needed at a little at a time till its on full mark-

Its due to heat expansion of the fluid

Your welcome