Tranny pump,where & is it part of rebuilding?
01-21-2010, 11:20 PM
#1
Tranny pump,where & is it part of rebuilding? I'm having tranny issues, and apparently it's the tranny pump.
is this inside the tranny? is it not part of a rebuild to replace this?
i'm wondering to see if it should be covered by the warranty.
thank you
is this inside the tranny? is it not part of a rebuild to replace this?
i'm wondering to see if it should be covered by the warranty.
thank you
01-24-2010, 12:06 AM
#3
performa is right.
The torque convertor has a short stub that goes into the a hole in the front of the tranny. This hole is in the center of the pump. If you look down into the bellhousing of the tranny you will see perimeter bolts. These are the bolts that hold the pump assembly in place.
When you turn the torque convertor until you feel/hear 3 clicks during installation you just properly engaged the drive of the pump. The pump is similar to a LS series crank driven oil pump.
The torque convertor has a short stub that goes into the a hole in the front of the tranny. This hole is in the center of the pump. If you look down into the bellhousing of the tranny you will see perimeter bolts. These are the bolts that hold the pump assembly in place.
When you turn the torque convertor until you feel/hear 3 clicks during installation you just properly engaged the drive of the pump. The pump is similar to a LS series crank driven oil pump.
01-24-2010, 08:33 PM
#4
And what they mean by "not damaged during installation" is if you do not hear 3 distinct clicks AND measure from the bellhousing to the mounting pads and then you try to bolt the tranny up you WILL break the pump rotor (the $5 part that makes your entire transmission work).
Don't do that.
On a 4l60e the measurement is 1.125" from bellhousing to mounting pads on the converter (that's 1 1/8"). On the 2nd click it'll be about 5/8" (.625"), so if you measure that, keeeeeeep trying.
I don't believe many places outright replace the pump, it's usually checked, the rotor/vanes/etc are replaced and possibly the whole thing is "decked" (not sure is this is the right word to use) to ensure a flat face. Rarely is it replaced completely unless you really break something badly. It's pretty expensive from what I've seen (300-400 for a new pump).
Don't do that.
On a 4l60e the measurement is 1.125" from bellhousing to mounting pads on the converter (that's 1 1/8"). On the 2nd click it'll be about 5/8" (.625"), so if you measure that, keeeeeeep trying.
I don't believe many places outright replace the pump, it's usually checked, the rotor/vanes/etc are replaced and possibly the whole thing is "decked" (not sure is this is the right word to use) to ensure a flat face. Rarely is it replaced completely unless you really break something badly. It's pretty expensive from what I've seen (300-400 for a new pump).
01-24-2010, 10:26 PM
#5
Very true. If the pump isnt damaged damaged then a tranny shop will not replace the pump. Its normal during a tranny rebuild to just completely disassemble the pump and inspect and replace internal parts as needed. There isnt alot of parts within the pump.
If you have a TCC solenoid make sure you remove it before pulling pump. The tcc solenoid fits into the pump housing and will break off if you try to remove the pump from the tranny case without first removing the tcc solenoid. Access to tcc solenoid is near valve body by removing tranny pan.
If you have a TCC solenoid make sure you remove it before pulling pump. The tcc solenoid fits into the pump housing and will break off if you try to remove the pump from the tranny case without first removing the tcc solenoid. Access to tcc solenoid is near valve body by removing tranny pan.
