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GENERAL INFORMATION

This information generally applies to both transmissions released by ford and gm

 

GEAR RATIOS

 

First – 4.70
Second – 2.99
Third – 2.15
Fourth – 1.80
Fifth – 1.52
Sixth – 1.28
Seventh – 1.00
Eighth – 0.85
Ninth – 0.69
Tenth – 0.64
Reverse – 4.87


Motorcraft ULV fluid  - 10r80 (ford)

DEXRON ULV fluid - 10l80/10l90 (gm)

 

Both ford and gm variations of the 10r/l use the same case connector plug but assign the pins differently

 

CONNECTOR PIN DESIGNATIONS: WIRE COLORS  DESIGNATION  
PIN
WIRE COLOR FUNCTION  
1 DK GRN/YEL Input Speed Signal  
2 DK GRN/PPL Transmission Intermediate Speed Signal  
3 BRN/WHT Transmission Input Speed Sensor Signal  
4 GRY/BLU Output Speed Signal  
5 DK GRN/YEL Ignition Mode Switch Mode Control  
6 WHT/BLU Ignition Mode Switch Mode Control Backup  
7 YEL/GRN Transmission Output Shaft Speed Sensor Circuit 9V Reference  
8 YEL/BLU Transmission Input Shaft Speed Sensor Circuit 9V Reference  
9 GRY/BRN Transmission High Side Driver 2 Control  
10 RED/PPL Secondary Fused Battery Positive Voltage 79  
11 DK GRN/GRY Transmission High Side Driver 1 Control  
12 WHT/RED Engine Control Vehicle Sensors 5 Volt Reference 1  
13 BRN/WHT Transmission Fluid Temperature Sensor Signal  
14 YEL/BRN Clutch Solenoid Valve E Control  
15 GRY/GRN Clutch Solenoid Valve D Control  
16 GRY Clutch Solenoid Valve C Control  
17 BLK GROUND  
18 DK GRN/WHT Auxiliary Transmission Fluid Pump Control  
19 DK GRN/BLK Default Disable Solenoid Control  
20 BLK/GRN Engine Control Sensors Low Reference 2  
21 PPL Transmission Clutch F Control  
22 WHT/BLU Transmission Clutch H Control  
23 WHT Transmission Clutch G Control  
24 DK GRN/WHT Transmission Line Pressure Control Solenoid Valve Control  
25 PPL/WHT Torque Converter Clutch Solenoid Valve Control  
26 BLK/BRN Transmission Fluid Temperature Sensor Low Reference

This pin is TCM ground, for ford this is pin 20, for gm its pin 26.