A/T - 440T4 No Line Pressure Rise
TRANSMISSION: 440T4/4T60BULLETIN: # 067
SUBJECT: No Line Pressure Rise
APPLICATION: GM
DATE: August 1991
440T4/4T60
NO LINE PRESSURE RISE
No line pressure rise condition can be caused by a stuck pump slide. The clearance between the pump slide and pump cover should be .0015". An easy way to see if the pump slide is too thick is to make a tool out of a pump cover. See Figure 1.
Bolt the modified pump cover to the valve body (leave the pump slide spring out.)
Now try to move the slide by prying on the spring contact. See Figure 2.
If the slide won't move, recheck the slide clearance.
Below is a list of the selective slides and their part numbers.
ID # SIZE PART NUMBER
# 1 .7082 8662900
# 2 .7086 8662901
# 3 .7090 8662902
# 4 .7094 8662903
# 5 .7098 8662904