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Torque Converter Housing

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Speed Sensors

Speed Sensors

ALLISON 1000 & 2000 PRODUCT FAMILIES TORQUE CONVERTER HOUSING

A. Housing B. Machined Sealing Surface B. Machined

Mounting

Surface

D. Filter

Attachment

Tube C. Cooler Ports and Pressure

Tap Threads

A. Inspect the housing for impact damage, chips and cracks. Inspect bolt holes for damaged threads. Replace the housing if damage cannot be repaired. B. Inspect machined surfaces for damage which might prevent proper sealing and/or seating. Inspect for deep scratches, scoring, grooves, nicks, burrs, chips and cracks. Replace the housing if damage cannot be repaired using a soft stone or crocus cloth.

C. Inspect cooler port and pressure tap threads for stripping and damage. Replace the housing if damage cannot be repaired. Some models use a cooler manifold which bolts to the torque converter housing. When used, inspect the cooler manifold cooler port and pressure tap threads for stripping and damage. Inspect the manifold channel plate for scratches, burrs and damage. Replace the manifold if damage cannot be repaired.

(continued)

A magnet sits on top of the control main filter and fits over the filter attachment tube.

Knockdown (Overdrive)

N/A

Exhaust or Drain Back

ALLISON 1000 & 2000 PRODUCT FAMILIES (continued) TORQUE CONVERTER HOUSING

Main Pressure

Lube Pressure Exhaust

Overage Oil Passage Detail

Exhaust or Drain Back

Suction

From Cooler

From Control Main Filter

To Control Main Filter

Main Pressure N/A

To Cooler

C1 Pressure C2 Pressure To Control Main Filter

From Control Main Filter

F. Input

Speed

Sensor

E. Input

Speed

Sensor

Bore

D. Inspect the filter attachment tube threads for stripping and damage. Replace the fitting if damage cannot be repaired. Replace the housing if the threaded bore is damaged and cannot be repaired. E. Inspect the input speed sensor bore for scoring, nicks, burrs, chips or cracks. Replace the housing if the damage cannot be repaired using a soft stone or crocus cloth. F. Inspect the input speed sensor for obvious external damage. Inspect the seal ring for wear, damage and proper fit on the sensor and in the speed sensor bore. Speed sensor resistance can be checked using an ohmmeter. Reference Troubleshooting Manual TS3192 for procedures and specifications.

Main Pressure To Cooler From Cooler

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