A/T - Valve Body Modifications

Number: 85-7-14 Date: 4/85
Subject: SERVICE MANUAL UPDATE - ELIMINATION OF CONVERTER CLUTCH SHIFT VALVE TRAIN

THM 700-R4 YK, YT, YX, YP, YZ, YC, PR, MT, VC, PQ, YN, YA
At the start of production of the 1985 THM 700-R4 transmission, the converter clutch shift valve train was eliminated on vehicles that have T.C.C. apply controlled by the E.C.M.. Use drawings to update your 1985 Service Manual.

Figure 1 - Control Valve Assembly Exploded:

Control Valve Assembly Legend
ILL.
NO. DESCRIPTION

301 VALVE, T.V. MODULATOR DOWNSHIFT
302 SPRING, T.V. MODULATOR DOWNSHIFT
VALVE
303 VALVE, T.V. MODULATOR UPSHIFT
304 SPRING, T.V. MODULATOR UPSHIFT VALVE
305 SLEEVE, CONVERTER CLUTCH THROTTLE
306 SPRING, CONVERTER CLUTCH THROTTLE
307 VALVE, CONVERTER CLUTCH THROTTLE
308 VALVE, CONVERTER CLUTCH SHIFT
309 SLEEVE, 3-4 THROTTLE VALVE
310 SPRING, 3-4 THROTTLE VALVE
311 VALVE, 3-4 THROTTLE
312 VALVE, 3-4 SHIFT
313 SLEEVE, 2-3 THROTTLE VALVE
314 SPRING, 2-3 THROTTLE VALVE
315 VALVE, 2-3 THROTTLE
316 VALVE, 2-3 SHIFT
317 SLEEVE, 1-2 THROTTLE VALVE
318 SPRING, 1-2 THROTTLE VALVE
319 VALVE, 1-2 THROTTLE
320 SLEEVE, LO RANGE CONTROL
321 VALVE, 1-2 LO RANGE DOWNSHIFT
322 VALVE, 1-2 SHIFT
323 SLEEVE, THROTTLE VALVE PLUNGER
324 PLUNGER, THROTTLE VALVE
325 SPRING, THROTTLE VALVE
326 VALVE, THROTTLE
327 SLEEVE, THROTTLE VALVE
328 VALVE, 3-4 RELAY
329 VALVE, 4-3 SEQUENCE
330 SPRING, 4-3 SEQUENCE VALVE
331 SPRING, T.V. LIMIT VALVE
332 VALVE, T.V. LIMIT
333 VALVE, 1-2 ACCUMULATOR
334 SLEEVE, 1-2 ACCUMULATOR VALVE
335 SPRING, 1-2 ACCUMULATOR VALVE
336 VALVE, LINE BIAS
337 SPRING, LINE BIAS VALVE
338 SPRING, 3-2 CONTROL
339 VALVE, 3-2 CONTROL
340 VALVE, MANUAL
341 PIN, COILED SPRING
342 PIN, COILED SPRING
343 RETAINER, SPRING (SLEEVE)
344 PLUG, VALVE BORE
345 PLUG, CUP (.33 DIA.)
346 SWITCH ASSEMBLY, PRESSURE (3RD CLUTCH)
347 SWITCH ASSEMBLY, PRESSURE (4-3 PULSE)
348 SWITCH ASSEMBLY, PRESSURE (4TH CLUTCH)
349 SWITCH ASSEMBLY, PRESSURE (T.C.C.
SIGNAL)
350 BODY, CONTROL VALVE
351 PLUG, T.V. LIMIT
352 PLUG, VALVE BORE (12.5 - O.D.)
353 VALVE, 1-2 LO RANGE UPSHIFT
354 PLUG, CONVERTER CLUTCH SHIFT VALVE
BORE (ECM CONTROLLED VEHICLES)
355 PLUG, CONVERTER CLUTCH T.V. BUSHING
BORE (ECM CONTROLLED VEHICLES)

Figure 3 - Valve Trains:

A THROTTLE VALVE & BUSHING B T.V. PLUNGER & BUSHING C 4-3 SEQUENCE VALVE D 3-4 RELAY VALVE E T.V. LIMIT VALVE TRAIN F ACCUMULATOR VALVE TRAIN G LINE BIAS VALVE TRAIN H 3-2 CONTROL VALVE TRAIN I MANUAL VALVE J 1-2 SHIFT VALVE TRAIN
K 2-3 SHIFT VALVE TRAIN L 3-4 SHIFT VALVE TRAIN M CONVERTER CLUTCH SHIFT VALVE TRAIN N M.T.V. UP VALVE TRAIN O M.T.V. DOWN VALVE TRAIN P CONVERTER CLUTCH T.V. BUSHING BORE PLUG (ECM CONTROLLED VEHICLES) Q CONVERTER CLUTCH SHIFT VALVE BORE PLUG (ECM CONTROLED VEHICLES)