PG COMPU-FLOW VALVE BODY
Part #203200 - Forward Shift Pattern Part #203220* - Reverse Shift Pattern
*Part # 203220 is obsolete and no longer made.
1. Raise the vehicle and support with jackstands or raise on an automotive lift. Make sure that the
vehicle is properly supported! Place a drain pan under the transmission.
2. If your transmission is equipped with a drain plug, remove the plug and allow the fluid to drain.
If your unit does not have a drain plug, remove all pan bolts except the 2 at the front of the
transmission. Remove bolts one at a time, working back to front. Exercise caution as transmission
fluid will splatter erratically during oil pan removal. You might need to reposition the transmission
crossmember in order to remove the rear oil pan bolts. If this becomes necessary, support the rear
of the transmission to prevent the transmission / engine assembly from moving down and causing
damage to the distributor cap and /or engine mounts. As you remove the bolts along the sides of
the oil pan, the weight of the fluid will usually cause the oil pan to separate from the transmission
case, allowing the fluid to drain from the rear of the oil pan. However, if the pan does not readily
separate from the transmission case, insert a screwdriver between the oil pan and the case and pry
gently to begin the draining process. Remove the two from oil bolts slowly (about one turn at a time)
and fluid will drain at a steady rate from the rear of the oil pan. Drain the oil pan completely and
keep it to hold bolts and small bolts and small parts.
3. Remove the vacuum modulator, modulator rod, dampening spring and modulator valve. The
modulator is located at the rear of the transmission on the driver's side. Remove modulator vacuum
line and block off vacuum at manifold. Install ATI modulator case plug with gasket.
4. Note the position of the detent guide plate, detent roller assembly, detent spring, and servo oil tube.
Also note that there are seven (7) valve body attaching bolts. There is also one other bolt that is
used to secure the detent guide plate to the transmission case.
5. Using a 1/2" socket, remove detent guide plate bolts and detent spring. Note the manner in which
the inner lever selector pin engages the groove in manual valve.
6. Remove the detent spring. Also remove six remaining valve body retaining bolts
using a 1/2" socket. Hold the valve body as you remove the last bolt. Additional oil will usually be
trapped between the valve body and the case, so watch out for splattering fluid as the valve body
is removed. If the valve body does not detach readily, insert a screwdriver between the servo tube
and case and pry gently to remove the valve body. Do not allow the manual valve to fall as you
lower the valve body.
6747 Whitestone Rd • Gwynn Oak, MD 21207 • (410) 298-4343
FAX: (410) 298-3579 • www.atiracing.com
Installation Instructions
1 Compu-Flow Manual Valve Body
Modulator Case Plug & Gasket 207340
ATI Compu-Flow Valve Body Decals (2)
Instruction Sheet
PACKING LIST
Packed by:
