If the torque converter was locked up, the vehicle would lurch forward when you shifted into drive.
There is a device that was called a dashpot that was behind the throttle connection (on the carb). It should look like a cylinder about an inch in diameter and about 2 inches long. This was supposed to provide a slight idle increase when shifted into gear. They also used this to increase idle speed when you turned on the A/C. This device might be bad.
However, with a 454 you should not have this problem unless the idle is to low (less than 500).
I would check the idle and maybe adjust it to around 800 in park. It should drop to 500ish when in gear.
Monday, June 25th, 2007 AT 10:14 AM