A/T - Control Valve Without Throttle Valve Sleeve Update

Number: 86-52

Section: 7C

Date: MAR., 1986
Subject: THM 700-R4 TRANSMISSIONS -
1986 SERVICE MANUAL UPDATE FOR ELIMINATION OF THE THROTTLE VALVE SLEEVE

Model and Year: 1982-86 ALL MODELS WITH THM 700-R4

TO: ALL CHEVROLET DEALERS

TRANSMISSION IDENTIFICATION INFORMATION:

THROTTLE VALVE SLEEVE:

Beginning on October 21, 1985, or Julian Date 294 (refer to Figure 1) all 1986 THM 700-R4 transmissions have been built with control valve assemblies that do not use a throttle valve sleeve (refer to item #327 in Figure 2) with the throttle valve (item #326).

CONTROL VALVE ASSEMBLY:

CONTROL VALVE ASSEMBLIES:

When servicing 1982 through 1985 model year transmissions this new assembly will be, used as current service parts stock is depleted. In order to update the appropriate 1986 Service Manual, revised illustrations (refer to Figures 3, 4 and 5) have been provided.

CONTROL VALVE ASSEMBLY:

A THROTTLE VALVE
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 N M.T.V. UP VALVE TRAIN M CONVERTER CLUTCH SHIFT 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 CONTROLLED VEHICLES)

49258B-700-R4

CONTROL VALVE ASSEMBLIES:

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 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 ASM., PRESSURE (3RD CLUTCH) 347 SWITCH ASM., PRESSURE (4-3 PULSE) 348 SWITCH ASM., PRESSURE (4TH CLUTCH) 349 SWITCH ASM., 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)

LEGEND 49212E-700-R4

FIGURE 5