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rebuilding a TC-727 for the GW. seems people ask about rebuilding these a lot. there is nothing to be afraid of in these,pretty simple piece of hardware. this one is getting a TCI Truckmaster kit. pretty much the same as the Pro-Super kit,but without the race type valve body mods,which are not needed in this app.
the victim,pan removed and drained.
to start,remove the T/Case adapter housing.the park pawl is in this part.
next,two circlips holding the governor in place. thick one is at the rearmost position. you'll need snap-ring pliers for this one.
there is a rod running through the governor and output shaft,pull the E-clip off one end,remove the rod,and pistons. the whole governor assy. will lift off the output shaft now.
loosen the front band adjuster,fully from the case.
remove the shifter and throttle (kick-down) arms.
remove the filter,then remove the 10 bolts holding the valve-body.3 in front,3 in back,and 4 on the side above the accumulator.it should lift off easliy at that point.sometimes it can get hung up on the neutral safety switch if it wasn't removed.
this is one of the reasons i like the 727. the valve body is removeable,so you can get rid of an undesired shift kit-or keep one-simply by swapping the valve body.
remove the bolts holding the front pump. when they're all removed,you can firmly smack the output shaft to push the pump out of the body.
now we pull the guts. remove the front band linkbar,and swing the band around and out of the case.
pull the input shaft,the clutch baskets come with it.
pull the planetary and output shaft next.
pull rear drum. loosen the adjuster on the arm first.
push the rear band arm pin out to remove the components,will need to tap it with a hammer.
pull this plug from the front,in the bell,lower corner. 1/4" square drive.
pull the front band pin out to remove the components,should slide out easy.
almost done stripping the case. here i'm using a C-clamp to depress the spring in the front band piston,to allow the spring clip to be pried out with a small screwdriver. the center accumulator simply lifts out,the rear band piston uses a light spring,you can hold it back with your thumb.
the front band piston can get wedged up. lightly tap it with a hammer and it'll come shootin' out.
the governor housing does not need to be removed in a lot af instances,but it's held on with 4 bolts,comes off easy.
off to the wash bay for an acid wash for you....
next,rebuilding the innards.
the victim,pan removed and drained.
to start,remove the T/Case adapter housing.the park pawl is in this part.
next,two circlips holding the governor in place. thick one is at the rearmost position. you'll need snap-ring pliers for this one.
there is a rod running through the governor and output shaft,pull the E-clip off one end,remove the rod,and pistons. the whole governor assy. will lift off the output shaft now.
loosen the front band adjuster,fully from the case.
remove the shifter and throttle (kick-down) arms.
remove the filter,then remove the 10 bolts holding the valve-body.3 in front,3 in back,and 4 on the side above the accumulator.it should lift off easliy at that point.sometimes it can get hung up on the neutral safety switch if it wasn't removed.
this is one of the reasons i like the 727. the valve body is removeable,so you can get rid of an undesired shift kit-or keep one-simply by swapping the valve body.
remove the bolts holding the front pump. when they're all removed,you can firmly smack the output shaft to push the pump out of the body.
now we pull the guts. remove the front band linkbar,and swing the band around and out of the case.
pull the input shaft,the clutch baskets come with it.
pull the planetary and output shaft next.
pull rear drum. loosen the adjuster on the arm first.
push the rear band arm pin out to remove the components,will need to tap it with a hammer.
pull this plug from the front,in the bell,lower corner. 1/4" square drive.
pull the front band pin out to remove the components,should slide out easy.
almost done stripping the case. here i'm using a C-clamp to depress the spring in the front band piston,to allow the spring clip to be pried out with a small screwdriver. the center accumulator simply lifts out,the rear band piston uses a light spring,you can hold it back with your thumb.
the front band piston can get wedged up. lightly tap it with a hammer and it'll come shootin' out.
the governor housing does not need to be removed in a lot af instances,but it's held on with 4 bolts,comes off easy.
off to the wash bay for an acid wash for you....
next,rebuilding the innards.
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