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PUMP AND CHANNEL PLATE REMOVAL
Two (2) back plate and nine (9) cover plate bolts hold the pump in place. A single silver colored bolt holds the pump cover to the pump back plate. DO NOT remove this bolt until the pump is off the transmission. Then if you wish to disassemble the pump you can remove this one too.
Remove the 1-2 shift solenoid (on the top left) to remove the channel plate bolts behind it.
Disconnect the link from the manual shift valve (top right of valve body.) To do this, raise the finger of the stamped metal keeper and pull the rod away from the valve.
Note that we do not remove all the bolts visible since we do not want to separate the valve body from the channel plate at this time.
Find a sheet of Styrofoam or cardboard to arrange the bolts as they appeared on the channel plate when you removed them. At least 6 different sizes & lengths are in use and it can be very confusing to sort this out later.
Besides the 10mm head bolt behind the 1-2 shift solenoid there is a 8mm head bolt below it and another immediately to the right, between these two bolts.
Along the channel plate bottom is another 8mm head bolt, near where the forward most T-40 Torx bolts go, and another 8mm head bolt at the bottom right corner of the channel plate.
A "circle" of 4 bolts with 10mm heads hold the channel plate around where the drive shaft exits the channel plate, and 1 T-30 Torx bolt as well.
bolt_pattern.pdf
Remove the 8mm head bolt at the top of the pressure switch assembly.
Remove the 13mm head bolt (the only such bolt) near the drive shaft.
Lastly, remove the 3 10mm head bolts along the lower left edge of the channel plate.
The channel plate should now be free. BEWARE:Besides the 10mm head bolt behind the 1-2 shift solenoid there is a 8mm head bolt below it and another immediately to the right, between these two bolts.
Along the channel plate bottom is another 8mm head bolt, near where the forward most T-40 Torx bolts go, and another 8mm head bolt at the bottom right corner of the channel plate.
A "circle" of 4 bolts with 10mm heads hold the channel plate around where the drive shaft exits the channel plate, and 1 T-30 Torx bolt as well.
bolt_pattern.pdf
Remove the 8mm head bolt at the top of the pressure switch assembly.
Remove the 13mm head bolt (the only such bolt) near the drive shaft.
Lastly, remove the 3 10mm head bolts along the lower left edge of the channel plate.
The manual valve can slide free at any moment.
The oil pump shaft will follow the channel plate out and may drop suddenly to the ground. However, the shaft will only fit correctly one way, if you didn't notice how it was oriented before it came out.
The 4th clutch assembly will stick to the channel plate during removal.
The drive sprocket thrust washer will be inside the 4th hub but not centered correctly anymore.
The oil pump shaft will follow the channel plate out and may drop suddenly to the ground. However, the shaft will only fit correctly one way, if you didn't notice how it was oriented before it came out.
The 4th clutch assembly will stick to the channel plate during removal.
The drive sprocket thrust washer will be inside the 4th hub but not centered correctly anymore.
Miscellania:
4T60E Differentials with an asterisk are "fine pitch" final drives. Sun gears, internal ring gears, and pinion gears are NOT interchangeable with other final drives.
4T65E with "IMS" have the newer type of s...
Kristopher Gerbracht