TH400 rebuild tech
m (dual feed separator plate info) |
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You can plug the hole with a brass dowel or a check ball. To use a check ball you will have to first drill the hole larger and then drive the check ball in place. | You can plug the hole with a brass dowel or a check ball. To use a check ball you will have to first drill the hole larger and then drive the check ball in place. | ||
| − | Drill the marked holes at .125" (1/8") for street use. | + | Drill the marked holes at .125" (1/8") for street use. At the 1-2 shift hole location, drill the small hole out. |
For a heavy duty application : 3rd gear shift use .150" drill (#25 bit, .149) and leave the 1-2 check ball out. '''Caution''' a 34 element sprag needs to used with the 1-2 check ball removed. | For a heavy duty application : 3rd gear shift use .150" drill (#25 bit, .149) and leave the 1-2 check ball out. '''Caution''' a 34 element sprag needs to used with the 1-2 check ball removed. | ||
| − | Near the bottom of the separator plate in photo, in the round ''' | + | Near the bottom of the separator plate in photo, in the round '''black circle'''. That hole should be plugged when the '''dual feed''' modifications are performed with the center lip seal removed from the direct clutch drum |
| − | [[file:T- | + | [[file:T-400_feed_holes03.jpg]] |
Another mod is blocking the 2-3 accumulator. I do this with a set screw. You tap the hole and install the set screw available from any hardware store. You will remove the 2-3 accumulator piston, discard the spring. This firms up the 2-3 shift. | Another mod is blocking the 2-3 accumulator. I do this with a set screw. You tap the hole and install the set screw available from any hardware store. You will remove the 2-3 accumulator piston, discard the spring. This firms up the 2-3 shift. | ||
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You can plug the hole with a brass dowel or a check ball. To use a check ball you will have to first drill the hole larger and then drive the check ball in place. | You can plug the hole with a brass dowel or a check ball. To use a check ball you will have to first drill the hole larger and then drive the check ball in place. | ||
| − | Drill the marked holes at 0.125" (1/8") for street use. | + | Drill the marked holes at 0.125" (1/8") for street use. At the 1-2 shift hole, drill out the small hole. |
For a heavy duty application : 3rd gear shift use 0.150" (# 25 bit, 0.1495") drill and leave the 1-2 check ball out. Caution a 34 element sprag needs to used with the 1-2 check ball removed. | For a heavy duty application : 3rd gear shift use 0.150" (# 25 bit, 0.1495") drill and leave the 1-2 check ball out. Caution a 34 element sprag needs to used with the 1-2 check ball removed. | ||
| − | Near the bottom of the separator plate in photo, in the round | + | Near the bottom of the separator plate in photo, in the round black circle. That hole should be plugged when the ''dual feed'' modifications are performed with the center lip seal removed from the direct clutch drum |
| − | [[file:T- | + | [[file:T-400_feed_holes03.jpg]] |
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