Mark Viii tranny diagram

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Bttrfly299

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Does anyone know where I can get a (hopefully) free diagram for the transmission for a 94 Mark Viii? It's an automatic. Thanks so much.
 
4r70wcomponents98.jpg


4r70wdisassembled981of2.jpg

Exploded 4R70W
1 7902 Converter Assy
2 87650-S2 Plug - Converter Drain - 1/8-27 Dryseal
3 7A103 Pump Assy - Front
4 7A248 Seal Assy - Front Pump
5 7A248 Seal - Front Pump
6 7B258 Bushing - Front Pump
7 N605789-S100Bolt - M8-1.25 X 35 Hex Head (7-Attach 7A103 to 7005)
8 7A106 Body Assy - Front Pump (Part of 7A103)
9 7A136 Gasket - Front Pump
10 7H169 Gear - Pump Inner Gerotor (Part of 7A103)
11 7H169 Gear - Pump Outer Gerotor (Part of 7A103)
12 7A108 Support Assy - Front Pump
13 N605787-S Bolt - M8-1.25 X 25 Hex Flg Head (5-Attach 7A108 to 7A103)
14 7D014 Washer - Front Pump Support Thrust -Select Fit No.1
15 7D020 Seal - Reverse Clutch Cylinder (2 Required)
16 7D019 Seal - Forward Clutch Cylinder (2 Required)
17 7F225 Seal - Intermediate Clutch Piston - Inner
18 7F224 Seal - Intermediate Clutch Piston - Outer
19 7E005 Piston Kit - Intermediate Clutch
20 7B442 Plate - Intermediate Clutch External Spline (Select Fit) (Steel)
21 7B164 Plate Assy - Intermediate Clutch Internal Spline (Friction)
22 7B066 Plate - Intermediate Clutch Pressure
23 7F196 Band Assy - Overdrive
24 391267-S Ring - 3-21/64 Retains Type SU External (Retains 7F262 to 7F215)
25 7F271 Clutch Assy - Intermediate One-Way Clutch
26 7D044 Drum Assy - Reverse Clutch
27 7D403 Seal - Reverse Clutch Piston - Outer
28 7D402 Piston Assy - Reverse Clutch
29 7D404 Seal Reverse Clutch Piston - Inner
30 7D256 Ring - Reverse Clutch Piston Pressure
31 7B070 Spring - Reverse Clutch Piston Return
32 7A577 Spring - Reverse Clutch Piston Spring
33 7B066 Plate - Reverse Clutch Front Pressure
34 7B164 Plate - Reverse Clutch Internal Spline (Friction)
35 7B442 Plate - Reverse Clutch External Spline (Steel)
36 7B066 Plate - Reverse Clutch Rear Pressure
37 7B497 Seal - Input Shaft (2 Required)
38 7D483 Retainer - Reverse Clutch Pressure Plate - (Select Fit)
39 7A166 Bearing and Race Assy - Forward Clutch No.2
40 7F207 Cylinder and Input Shaft Assy - Forward Clutch
41 7A548 Seal - Forward Clutch Piston - Outer
42 7C099 Seal - Forward Clutch Piston - Inner
43 7A262 Piston - Forward Clutch
44 7A480 Spring - Forward Clutch Piston Return
45 7A527 Retainer Return Spring - Forward Clutch
46 388099-S Snap Ring - Retaining - 1-59/64 (Retains 7A529 in 7F207)
47 7E085 Spring - Rear Clutch Pressure Plate
48 7B442 Plate - Forward Clutch External Spline (Steel)
49 7B164 Plate - Forward Clutch Internal Spline (Friction)
50 7B066 Plate - Forward Clutch Pressure
51 7D483 Snap Ring - Retaining (Select Fit)
52 7F231 Bearing and Race Assy - Forward Clutch - Front No.3
53 7B067 Hub - Forward Clutch
54 7F351 Shaft - Intermediate Stub
55 7C096 Bearing and Race Assy - Forward Clutch Hub No.4
56 7A019 Gear Assy - Reverse Sun
57 7F244 Bearing and Race Assy - Forward Clutch Sun Gear No.5
58 388501-S Retaining Ring - Center Support - 7-7/92
59 7A399 Gear Assy - Forward Clutch Sun
60 7F277 Spring - Case to Planet Support
61 7A130 Support Assy - Planetary Gear
62 7A089 OWC Cage Spring and Roller Assy - Planetary
63 7A398 Planetary Assy
64 7D095 Band Assy - Reverse
65 377437-S Retaining Ring - 0.58 Thick (Locates Reverse Band During Assy)
66 7F236 Hub - Direct Clutch
67 7F243 Bearing and Race Assy - Direct Clutch Inner No.7
68 7F237 Support - Direct Clutch Inner Bearing
69 7D483 Retaining Ring - Direct Clutch Pressure Plate (Select Fit)
70 7B066 Plate - Direct Clutch Pressure
71 7B164 Plate - Direct Clutch Internal Spline (Friction)
72 7B442 Plate - Direct Clutch External Spline (Steel)
73 388104-S Retaining Ring - 1-19/32 (Retains 7F235 to 7F283)
74 7F235 Retainer and Spring Assy - Direct Clutch
75 7A262 Piston Assy - Direct Clutch
76 7C099 Seal - Direct Clutch Piston - Inner
77 7A233 Seal - Direct Clutch Piston - Outer
78 7A153 Gear - Output Shaft Ring
79 7F283 Cylinder Assy - Direct Clutch
80 7F274 Seal - Output Shaft Small � Direct Clutch (2 Required)
81 7F240 Bearing and Race Assy - Direct Clutch Outer No.8
82 7060 Shaft Assy - Output
83 7F273 Seal - Output to Case Shaft Large (3 Required)
84 87054-S94 Seal - O-Ring (Piloted Output Shaft Only)
85 7D164 Hub - Output Shaft
86 97713-SSnap Ring - 1-13/16 Retaining (Retains 7D164 to 7060)
87 7C122 Snap Ring - Retaining (Retains 7D164 to 7A153)
88 7025 Bushing - Rear Case
89 7F242 Bearing and Race Assy - Case Rear No.9
90 7005 Case Assy
91 7086 Gasket - Extension
92 N803747-S1101 Bolt - M8-1.25 X 30 (6-Attach 7A039 to 7005)
93 7A039 Extension Assy
94 7A034 Bushing - Extension Housing
95 7052 Seal Assy - Extension Housing
96 390318-S100 Pipe Plug - 1/8-27 Dryseal Tapered (5 Required)
97 7F295 Pin - Overdrive Band Anchor
98 388142-S Pin - Reverse Band Anchor (Part of 7005)
99 7034 Vent Assy - Case
100 N605771-S427Bolt - M6-1.0 X 14 Hex Flg Head (Attaches Output Shaft Speed Sensor
101 7H103 Sensor Assy - Transmission Output Shaft Speed
102 7Z101 Seal - 14.0 X 1.78 O-Ring (2 Required)
103 N806933-S102Bolt and Washer Assy - M6-1.0 X 25MM (2 -Attach 7F293 to 7005)
104 7A247 Sensor - Transmission Range
105 7A256 Lever Assy - Manual Control
106 7B498 Seal Assy - Manual Control Lever
107 373907-S2 Nut - 1/4 Spring (Retains Identification Tag to 7000)
108 7B148 Tag - Identification (Part of 7005)
109 7D273 Connector Assy - Fluid Tube (2 Required)
110 7N171 Plug - Converter Housing Access
111 7E242 Screen Assy - Fluid
112 7B210 Pin - Manual Lever Shaft Retainer
113 7Z383 Seal - 0.426 X 0.070 O-Ring
114 7Z101 Seal - 14.0 X 1.78 O-Ring
115 7G383 Solenoid Valve - Transmission Pressure Control
116 7A441 Pawl - Parking Pawl
117 7D071 Shaft - Parking Pawl
118 7D419 Cup - Park Rod Guide (Part of 7A039)
119 7D070 Spring - Parking Pawl Return
120 7A232 Rod Assy - Park Pawl Actuating
121 7A115 Lever Assy - Manual Valve Detent Lever
122 N800287-S536Nut - M14 X 1.5 Hex - Intermediate Detent Lever (Attaches 7A115 to 7A256)
123 7H188 Piston Assy - Overdrive Servo
124 7F201 Spring - Overdrive Servo Piston
125 7F203 Rod - Overdrive Servo Actuating (Part of 7H188 )
126 7H179 Washer - Backup Overdrive Servo (Part of 7H188 )
127 7G277 Spring - Overdrive Cushion Spring (Part of 7H188 )
128 7F200 Piston Assy - Overdrive Servo (Part of 7H188 )
129 97411-SRing - Retaining (Part of 7H188 )
130 7F411 Sleeve Assy - Overdrive Servo (Part of 7H188 )
131 7384 Ring - 2.85 Retaining Type TVP "H" Internal (Retains 7H188 to 7005)
132 7D031 Spring - Reverse Band Servo Piston
133 7D189 Piston Assy - Reverse Band Servo
134 7D036 Cover Assy - Reverse Band Servo Piston
135 388215-S100 Retaining Ring - Internal - 3-13/16
136 7H292 Piston Seal - 2-3 Accumulator (Bonded Seals)
137 7F285 Spring - 2-3 Shift Accumulator Piston
138 7B264 Retainer - 2-3 Shift Accumulator Spring
139 7F284 Spring - 1-2 Shift Accumulator
140 7F251 Piston Assembly - 1-2 Shift Accumulator
141 7F284 Spring - 1-2 Shift Accumulator
142 7H300 Cover and Seal Assy - 1-2 Accumulator
143 7384 Ring - 2-1/16 Retaining Type HU Internal (Retains 7H300 to 7005)
144 N807178-S1000 Bolt - M6-1.0 X 16 Hex Head (12-Attach Reinforcing Plate to Valve Body)
145 7F282 Plate - Valve Body Reinforcing (Part of 7A100)
146 7C155 Gasket - Valve Body Separator - Upper
147 7A008 Plate - Control Valve Body Separator (Part of 7A100)
148 7D100 Gasket - Valve Body Separating - Lower
149 7H171 Valve - Converter Drainback
150 7A091 Body Assy - Main Control
151 7H173 Gasket - Valve Body Cover Plate
152 7C034 Plate - Valve Body Cover (Part of 7A100)
153 N807178-S1000 Bolt - M6-1.0 X 18 Hex Head (11-Attach 7C034 to 7A100)(Part of 7A100)
154 7A100 Control Assy - Main
155 7A098 Filter and Seal Assy - Fluid
156 7A191 Gasket - Transmission Pan
157 7A194 Pan - Transmission
158 N605785-S427Bolt - M8-1.25 X 18 Hex Flg Head (14-Attach 7A194 to 7005)
159 7L027 Magnet - Ceramic Case (Part of 7A194)
160 N808947-S1300 Bolt - M8-1.25 X 46 Hex Shldr Pilot (2 -Attach 7C034 to 7A100)
161 N807179-S1000 Bolt - M6-1.0 X 52 Hex Flg Head (12 -Attach 7A100 to 7005)
162 7H111 Retainer - Solenoid
163 7E195 Ball - 1/4 Diameter Coast Booster Valve Shuttle (8 Required)
164 7H187 Screen - Solenoid Pressure Supply
165 N606022-S1000 Bolt - M6-1.0 X 40 Hex Flg Head (13 -Attach 7A100 to 7005)
166 7E332 Spring Assy - Manual Valve Detent
167 7Z276 Seal - 0.864 X 0.070 O-Ring (2 Required)
168 7G276 Bulkhead Assy - Wiring Connector
169 7G276 Bulkhead Assy - Connector (Molded Lead Frame)
170 7Z484 Seal - 6.07 x 1.70 O-Ring (2 Required)
171 7G484 Solenoid Valve - Transmission Shift
172 7G136 Solenoid Valve - Transmission Torque Converter Clutch
173 N807178-S1000 Bolt - M6-1.0 X 16 Hex Head (Retains 7G136 & 7G484 to 7A100)
174 7Z136 Seal - 0.489 x 0.070 O-Ring
175 7Z484 Seal - 0.176 x 0.070 O-Ring
A --Intermediate Clutch Assy
B --Intermediate One-Way Clutch
C --Reverse Clutch Assy
D --Forward Clutch Assy
E --Direct Clutch Assyto Case)
 
GMAN said:
Dang man, do you have some kind of program? If so, please share.
Click to expand...

Program? No, shop has Alldata, but those pics I found just by researching the Internet. I can pretty much get ya any diagram you want.
 
I know you're not gonna believe this, but it isn't as bad as it looks.

If anybody has access to one they can take apart, I recommend it. Once you get the pump off the front of the case, you can pretty much pull everything out (it's like clutch pack after clutch pack - 1st the Intermediate clutches then the reverse drum that contains the - u guessed it - reverse clutches. After that the forward shaft & clutches, then direct clutch assembly. Now you're at the output shaft and you've taken it completely apart!) There is a couple of bands and one-way clutches along the way too. :D
 
The old power glide 2 speed isn't so bad but no way I'm messing with a modern day 4 plus speed auto. I have my racing buddy the tranny guy who gets all my business. Best thing to do is take good care of them and not have to fix them.

I do plan to get a new convertor in the spring and plan to put that in myself but that is no where near the job of rebuilding the whole thing.
 
For the halibut, my buddy and I took apart a 4r70w and the parts could've stretched from here to Texas. It's no wonder rebuilds are so costly. I think the transmission is the most complicated part to these cars. And no, we were not able to put humpty dumpty back together again. LOL
 
KStromberg said:
For the halibut, my buddy and I took apart a 4r70w and the parts could've stretched from here to Texas. It's no wonder rebuilds are so costly. I think the transmission is the most complicated part to these cars. And no, we were not able to put humpty dumpty back together again. LOL
Click to expand...

I've always been wanting to do that. If it was not so much work to R&R the trans out of the car to test I would have tried to rebuild it myself.

Considering this is transmission number 5 for me...maybe I shouldn’t.
 
OMG what have go into...my dream car has become a nightmare! Schematic hell..thanks!:eek::confused::cool:
 
It's not as hard as you think. It's all about keeping things in their proper sequence. I've rebuilt several automatics, not a big deal really.

The hardest part is removing/installing it from the car!
 
Pantera1973 said:
It's not as hard as you think. It's all about keeping things in their proper sequence. I've rebuilt several automatics, not a big deal really.

The hardest part is removing/installing it from the car!
Click to expand...

I watched a youtube video for assembly of the 4R70W. Guy assembled it in abt 15 min. So I would guess you are right. Most difficult part is removing it and reinstalling it after the rebuild. I hope to be able to try a rebuild someday. Pull-A-part sells their transmissions for $85. So, at least in theory, I could remove and rebuild one and then swap it for the one that is failing/ailing(?) on my car at the moment. I feel a little bit more intelligent now that I have seen the schematic and done some homework.:)
 
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