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45RFE—General Reference Data

Trans Basic Operation:The 45RFE is a RWD 4-speed unit. Pressurerise, TCC, and shift timing for all gears is com-pletely electronically controlled.The 45RFE is actually capable of producing 5

forward speeds, with the 5th speed known as“2nd prime”. This ratio is only used during ahigh speed kickdown as the ratio is designedfor better acceleration.

© Tran

Clutch & Band Application Chart

UnderdriveClutch

OverdriveClutch

ReverseClutch

4thClutch

2ndClutch

L/RClutch

LowRoller

2nd ClSolenoid

MultiSelec

Soleno

Park  Applied

Reverse  Applied Applied

Neutral  Applied

Overdrive (OD)1st Speed

 Applied Applied Locked Active

Overdrive (OD)2nd Speed

 Applied Applied ON Active

Overdrive (OD)3rd Speed

 Applied Applied

Overdrive (OD)4th Speed

 Applied Applied

Drive1st Speed

 Applied Applied Locked

Drive2nd Speed

 Applied Applied

Drive3rd Speed

 Applied Applied

Manual Low (1)  Applied Applied Applied Locked Active

*Active = L/R-LU Solenoid used to control TCC in 2nd, 3rd, & 4th Gears – All Solenoids Variable Duty Cycled controlled 

LR/CCSolenoid

UDSolenoid

ODSolenoid

ON

ON

ON

ON ON

ON

Overdrive (OD)2nd Speed (Prime)

 Applied Applied ON Active

4th ClSolenoid

ON

ON

Input SensorOutput Sensor

Cooler Return:Bottom Line

Freewheels clockwise

Hold Drum

Line PressureSensor / Transducer

Pin 1

Pin 1=GroundPin 2=5VoltsPin 3=Signal

The Line Pressure Sensor (transducer) is usedto convert a fluid pressure value into an electri-cal signal for use by the computer. The com-puter will control pressure by altering com-mand to the pressure solenoid and monitor theactual pressure sensed by the transducer.The transducer is mounted on the left rear ofthe unit and is also the location used to testpressure using a special adapter.

ElecAir Tnext

TCC Off

TCC On

Line Pressure Transducer (Test Port*)OD = 35-165 psi

Reverse = 40-250 psi*Requires special adapter for pressure tests.

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© TransG

45RFE General Reference Data

OverdriveClutch

ReverseClutch

UnderdriveClutch

4thClutch

2ndClutch

L/RClutch

Pin# Function

1 12v Supply

2 LR/TC Solenoid Control

3 Park/Neutral Switch Signal4 Trans Range Signal (T41)

5 Trans Range Signal (T42)

6 Reverse Light Feed

7 Overdrive Clutch Solenoid Control

8 Trans Range Signal (T3)

9 Trans Range Signal (T1)

10 Trans Control Relay Output

11 4th Clutch Pressure Switch

12 Line Pressure Solenoid Control

13 Trans Range Signal (T2)

14 L/R Clutch Pressure Switch

15 2nd Clutch Pressure Switch

16 Overdrive Clutch Pressure Switch

17 Underdrive Clutch Solenoid Control

18 Underdrive Clutch Pressure Switch

19 4th Clutch Solenoid Control

20 2nd Clutch Solenoid Control

21 Multi-Select Solenoid Control

22 Speed Sensor Ground

23 Trans Oil Temperature Signal

Case Connector Terminal ID

1011 9 8

7 6 5 4

123

12

13141516

17181920

212223

FRONT

Electrical NotesTerminal 10 is the common 12v supply for all thnoids and switch circuits. All solenoids EXCEPT Line Pressure Solenoid OhmsLine Pressure Solenoid = 4.3 Ohms

TOT Sensor = 9.37k Ohms @ 72ºF

Air Checks

Range Sensor/Solenoid Body Assembly