Turbo Action 17255E Torqueflite 727, 904, 998 & 999 Electronic Valve Body (PRND21) - Manual (Page 3)

Part #17255E 5/27/04 Page #3
STEP #3: Carefully remove the ten 7/16” bolts which hold the valve body in place. Slowly
pull valve body out of transmission, noting the hole that the long swinging rod
came out of. May be necessary to turn drive shaft to release long swinging rod.
The rod controls your vehicle’s park function. Most Torqueflites will have a large
spring between one end of the valve body and the case. This spring
should not be put back in the vehicle when using this valve body.
STEP #4: The transmission valve body is a very intricate piece of your transmission and
therefore care should be taken to keeping it clean while working on it. Lay old
valve body on a bench or table so that the swinging rod is laying towards you.
Remove small clip that holds the swinging rod in place. Install this swinging rod
on the new valve body. Secure by reinstalling clip. This swinging rod should fit
the same as it did on the old valve body.
STEP #5: Remove the three screws that hold the old filter on the old valve body. If installing
deep pan, follow instructions for pickup installation. Install new filter #17013
directly against pickup. Install the thick gasket supplied between the valve body
and deep pan pick-up.
STEP #6: If transmission is out of the vehicle, the governor valves can be removed.
STEP #7: Cut out the templet, Fig. #1. Mark spot to be drilled with a small punch. Drill
small 1/8” pilot hole. Then take #00690 special 7/16” drill and drill hole in case as
shown in Fig. #2.
STEP #8: Using #00691 special 1/4” pipe tap, tap the case till the case connector will just
show through inside the case, Fig. #3.
STEP #9: Install case connector into case, Fig. #3.
STEP #10: Remove accumulator piston by pulling down the middle piston from the passenger
side of the transmission, Fig. #6. Some units have a spring on top, some on bottom
of piston and some none at all. Install #17131A Accumulator Piston Blocker
between case and piston. CAUTION: Be sure piston is below surface enough to
install valve body and not hit piston. If rod is too long, cut or grind small amount
off and recheck. Also, leave out spring if it had one.
SPECIAL NOTE
If your transmission has part #35XXXXX or higher stamped on driver’s side, just under shift
linkage near pan rail, you have a 1971 or newer transmission. If you have a 1971 or newer,
YOU MUST check under the accumulator to see if anyone has ever drilled a 3/16” hole in the
upper small bore, Fig. #6. If your unit has the hole and has the #35XXXXX or higher, you must
then plug the hole with a 1/4-20 set screw. If unit is a 1970 or older part #34XXXXX or lower
you do not have to plug hole.
STEP #11: Adjust rear band. If 727, turn in adjustment finger tight (10 in./lbs.), back off
two (2) turns and then holding adjustment, lock the locknut. If 904, back off four
(4) turns.