B&M 40263 SHIFT IMPROVER KIT - Manual (Page 8)

8
Oil Pressure Specifications
Selector Line Pressure TV Limit Pressure
Position PSI (kPa) PSI (kPa)
At idle
In Reverse 109-129 (751-890) 0 0
All Other Ranges 74-94 (510-648) 0 0
At W.O.T. (Stall)
In Reverse
3.8L & 4.9L 264-304 (1820-2096) 74-86 (510-593)
All other engines 275-315 1896-2172) 79-91 (545-627)
All Other Ranges
3.8L & 4.9L 200-220 (1379-1517) 74-86 (510-593)
All other engines 209-229 (1441-1579) 79-91 (545-627)
Line Pressure Test Results
Low at idle in all ranges: Check for low fluid level, clogged
or damaged filter, loose valve body bolts, stuck pressure
regulator valve, missing pressure regulator spring or oil
temperature too hot from excessive W.O.T. test.
Low at W.O.T. but O.K. at idle: Check for low oil level,
clogged filter, damaged or out of adjustment TV linkage,
Sticking TV or TV limit valve in valve body.
Slow initial engagement Low line pressure
Fluid level low
Harsh initial engagement Engine idle too high
Loose U-joint or engine mount
High line pressure
Sticking valves in valve body
2-3 accumulator valve stuck
No drive in any selector Valve body leaking internally
position Valve body bolts loose
Sticking valves in valve body
Manual valve pin not engaged
Fluid level low
No drive forward, Worn or stuck governor
but has reverse Valve body bolts loose
Sticking valves in valve body
Damaged 2-3 accumulator seal
Slips or chatters in 1 st gear TV linkage out of adjustment
(Selector in “OD”) Low line pressure
Valve body bolts loose
Slips or chatters in 2 nd gear Defective intermediate clutch
(Selector in “OD”, OK in 1 st ) Sticking valves in valve body
Slips or chatters in Reverse Low line pressure
Valve body bolts loose
Starts in 2 nd or 3 rd Sticking governor
Sticking valves in valve body
Cross channel leaks between
case or separator plate
and valve body
Incorrect shift points TV linkage out of adjustment
Worn governor
Sticking valves in valve body
NO 1-2 upshift TV linkage out of adjustment
Governor valve sticking
Sticking valve in valve body
Mushy 1-2 shift Out of tune engine
Defective intermediate clutch
TV linkage out of adjustment
Low line pressure
No 2-3 upshift Defective direct clutch
Convertor damper hub broken
Sticking valve in valve body
Mushy 2-3 upshift Defective 2-3 accumulator
piston or seals
Low line pressure
Mushy or rough Out of tune engine
3-4 upshift Defective OD band or reverse drum
TV linkage out of adjustment
No forced down Defective clutch or band
shifts TV linkage damaged or out of adjustment
Sticking valve in valve body
Transmission Overheated engine
overheats Restriction in cooler or lines
Converter overrun clutch seized
Sticking valves in valve body
Transmission noise Relief valve buzzing
Oil pump cavitation
TROUBLESHOOTING GUIDE FOR THE FORD AOD TRANSMISSION
The troubleshooting guide is intended to help you identify possible causes of malfunctions that could be related to
incorrect assembly or adjustment of the transmission hydraulic system (valve body and accumulator) and or mechanical
controls. We recommend that you obtain an AOD service manual for problems related to the torque converter or
transmission hard parts.
Line Pressure check
*On the AOD transmission two pressure readings
must be taken: One at idle (closed throttle, Zero TV
Press.) and another at wide open throttle (W.O.T.,
Full TV Press.).
*Engine and transmission should be at normal operat-
ing temperature for test.
*During test at W.O.T. (stall) the wheels must be
locked to prevent any vehicle motion.
*DO NOT operate at W.O.T. Stall for more than 10
seconds at a time, followed by at least 2 minutes in
Neutral at 1000 RPM to cool the oil.
*Connect a 0-300 PSI (0-2000 kPa) pressure gage to
the line pressure port located just above the control
levers on the right side of the transmission (See Fig.
8). The gage hose must be long enough to read gage
while operating engine.
*Connect a 0-100 PSI (0-690 kPa) gage (300 PSI gage
will work if it’s all you have) to the TV Pressure tap
on the right hand side of the transmission (See Fig.
8). The gage hose must be long enough to read gage
while operating engine.
*Idle pressure must be read with throttle off the fast
idle cam.
*Pressures listed apply to stationary vehicle only. In
3 rd and 4 th gears line pressure is lower (cut back) than
shown for “all other ranges”.