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Automatic Transmission - Allison - Specifications GMC Sierra 2500

Automatic Trans ~226 words

Temperature Versus Resistance (Transmission Fluid Temperature Sensor)

TemperatureTemperatureMinimum ResistanceNominal ResistanceMaximum Resistance
°C°FOhmsOhmsOhms
4549128565141951155338
404095826100735105644
3531689527231575679
3022501535248054807
2513368543847840103
204273452848829631
155204762128622097
1014154671604516624
523117811219712612
032904593459646
541699872197441
1050545856235787
1559429144134536
2068339834903582
2577271027792849
3086217322282282
3595175417971840
40104142414591493
45113116311911218
50122955.0977.1999.2
55131788.6806.5824.5
60140654.7669.3683.9
65149546.3558.3570.2
70158458.1467.9477.8
75167385.9394.1402.2
80176326.6333.3340.1
85185277.5283.2288.9
90194236.5241.6246.7
95203202.4206.9211.5
100212173.8177.9182.0
105221149.8153.6157.3
110230129.7133.0136.4
115239112.6115.6118.7
12024898.17100.9103.6
12525785.8788.2990.71
13026675.3577.5279.69
13527566.3468.2770.21
14028458.5860.3162.04
14529351.8853.4254.97
15030246.0847.4648.84
15531141.0442.2743.50
16032036.6537.7438.84

Temperature Versus Resistance (Transmission Fluid Temperature Sensor)

Temperature Versus Resistance (Speed Sensor)

TemperatureTemperatureMinimum ResistanceNominal ResistanceMaximum Resistance
°C°FK ohmsK ohmsK ohms
25131.932.142.36
0322.162.402.64
25772.342.602.86
501222.612.903.20
751672.843.163.47
1002123.073.413.75
1252573.303.674.03
1503023.483.874.26

Temperature Versus Resistance (Speed Sensor)

Temperature Versus Resistance (Solenoid)

Sump TemperatureSump TemperaturePressure Control Solenoids 1, 2, MAIN MOD, and TCC ResistanceShift Solenoids 1, 2, and 3
°C°FOhmsOhms
0324.4-4.919.3-21.3
20684.8-5.321.0-23.0
401045.2-5.722.6-24.9
801765.9-6.525.9-28.5
1202486.7-7.429.2-32.1

Temperature Versus Resistance (Solenoid)

Fastener Tightening Specifications

ApplicationSpecification
MetricEnglish
Control Valve Assembly to Main Housing Bolts12106 lb in
Converter Housing/Oil Pump Cover Assembly to Transmission Case Bolts5641 lb ft
Converter Housing to Oil Pump Cover Assembly Bolts5641 lb ft
Detent Lever/IMS Assembly to Manual Shift Shaft Bolt1089 lb in
Detent Lever Retaining Nut2921 lb ft
Detent Spring Assembly to Main Valve Body Bolts12106 lb in
Filler Tube Bracket to Transmission Nuts1813 lb ft
Fuel Line Bracket to Transmission Nut1813 lb ft
Fuel Line Retainer to Transmission Bolts2.522 lb in
Heat Shield to Transmission Bolts1713 lb ft
Heat Shield to Transmission Nut2518 lb ft
Hydraulic Connector Assembly2518 lb ft
Input Speed Sensor to Torque Converter Housing Bolt12106 lb in
Line Pressure Test Hole Plug12106 lb in
Low and Reverse Clutch Housing to Transmission Case5641 lb ft
Main Pressure Tap Plug12106 lb in
Main Valve Body to Shift Valve Body Bolts12106 lb in
Oil Cooler Line Clip to Oil Pan Nut980 lb in
Oil Cooler to Radiator Brace Bolts12106 lb in
Oil Filter Adapter3022 lb ft
Oil Pan Drain Plug3526 lb ft
Oil Pan to Main Housing Bolts2720 lb ft
Oil Pump Cover to Oil Pump Bolts2720 lb ft
Output Shaft Retaining Nut9066 lb ft
Output Speed Sensor to Rear Cover Bolt12106 lb in
Power Take-Off (PTO) Cover to Main Housing Bolts4332 lb ft
Pressure Control Solenoid (PCS) Retaining Bracket Bolts12106 lb in
Shift Cable Bracket to Transmission Bolts2518 lb ft
Shift Cable Support to Steering Column Brace Bolt1089 lb in
Shift Lever to Shift Selector Shaft Nut2418 lb ft
Shipping Bracket to Torque Converter Housing Bolts2720 lb ft
Shipping Bracket to Torque Converter Lug Bolts2720 lb ft
Torque Converter Housing Inspection Cover to Transmission Bolts1089 lb in
Torque Converter to Flywheel Bolts6044 lb ft
Transmission Fluid Pressure Switch to Main Valve Body Bolts12106 lb in
Transmission Mount to Adapter Bolts (4WD)- Use NEW Fastener100 + 45°74 lb ft + 45°
Transmission Mount to Transmission Bolts (2WD)- Use NEW Fastener45 + 50°33 lb ft + 50°
Transmission Mount to Transmission Support Nuts10779 lb ft
Transmission Support to Frame Nuts and Bolts7052 lb ft
Transmission to Engine Studs and Bolts5037 lb ft
Turbine Speed Sensor to Main Housing Bolt12106 lb in
Transmission Range Selector Cable Bracket Bolt2216 lb ft
Transmission Range Selector Cable Lever Nut2518 lb ft
Wire Harness/Vent Tube Bracket to Transmission Nut1813 lb ft
Vehicle Speed Sensor (VSS) Bolt12106 lb in
Yoke Assembly to Output Shaft Bolt12391 lb ft

Fastener Tightening Specifications

Torque Converter Specifications

Torque Converter ConditionMaximum Allowable End Play
New0.80 mm (0.031 inch)
Used1.70 mm (0.067 inch)

Torque Converter End Play Specifications

MeasurementAllowable Wear Limits
Minimum OD of Hub- Bushing Wear Area58.250 mm (2.2933 inch)
Minimum Distance Between Hub Flats51.691 mm (2.0351 inch)
Minimum OD of Cover Pilot43.16 mm (1.699 inch)

Torque Converter Wear Limits Specifications

Transmission General Specifications

NameAllison
Transmission Weight Dry150 kg (330 lb)
Transmission Weight Wet161.1 kg (353.0 lb)

Transmission Weight

NameAllison 1000 Series
1st Range Ratio3.10:1
2nd Range Ratio1.81:1
3rd Range Ratio1.41:1
4th Range Ratio1.00:1
5th Range Ratio0.71:1
6th Range Ratio0.61:1
Reverse Range Ratio4.49:1

Transmission Gear Ratio

Sump TemperatureResistance
Degrees CDegrees FOhms
0329.5
206810.5
4010411.5

Torque Converter Clutch Pressure Control Solenoid (TCC PCS) Specifications

Sump TemperatureResistance
Degrees CDegrees FOhms
03220.0
206822.0
4010424.5

Shift Solenoid 1 (SS1), SS2, and SS3 Specifications

Part MeasuredSpecification
MetricEnglish
Torque Converter Pump Hub Minimum OD58.250 mm2.2933 in
Torque Converter Pump Hub Minimum Distance Between Flats51.691 mm2.0351 in
Torque Converter Cover Pilot, Minimum OD43.150 mm1.6988 in
Stator Shaft, Maximum ID at Turbine Shaft Seal Ring Bore45.450 mm1.7894 in
Stator Shaft, Maximum Spline WearNo visible wearNo visible wear
Stator Shaft Bushing, Maximum ID33.830 mm1.3319 in
Transmission Oil Pump Cover Assembly Thrust Washer Thickness1.490 mm0.0590 in
1-2-3-4, 4-5-6 Clutch Housing Bushing, Maximum ID78.170 mm3.0776 in
1-2-3-4, 4-5-6 Clutch Housing Rotating Seal Bore, Maximum ID74.050 mm2.9154 in
1-2-3-4 Clutch Fiber Plates Minimum Thickness1.675 mm0.0659 in
1-2-3-4 Clutch Fiber Plates Minimum Oil Groove Depth0.080 mm0.0031 in
1-2-3-4 Clutch Steel Plate Minimum Thickness2.135 mm0.0841 in
4-5-6 Clutch Fiber Plates Minimum Thickness2.375 mm0.0935 in
4-5-6 Clutch Fiber Plates Minimum Oil Groove Depth0.200 mm0.0079 in
4-5-6 Clutch Steel Plate Minimum Thickness2.135 mm0.0841 in
Turbine Shaft Bushing, Maximum ID20.134 mm0.7927 in
Turbine Shaft Thrust Washer2.590 mm0.102 in
3rd, 5th and Reverse/2-6 Clutch Fiber Plate Minimum Thickness1.675 mm0.0659 in
3rd, 5th and Reverse/2-6 Clutch Steel Plate Minimum Thickness2.440 mm0.0961 in
3rd, 5th and Reverse Clutch Backing Plate Minimum Thickness18.20 mm0.7165 in
Thrust Plate Inner Rim, Minimum Thickness2.920 mm0.1150 in
2-6 Clutch Backing Plate Minimum Thickness11.10 mm0.4370 in
Low and Reverse Clutch Fiber Plate Minimum Thickness2.375 mm0.0935 in
Low and Reverse Clutch Fiber Plate Minimum Oil Groove Depth0.200 mm0.0079 in
Low and Reverse Clutch Backing Plate Maximum Cone0.000 mm0.0000 in
Low and Reverse Clutch Backing Plate Minimum Thickness17.900 mm0.704 in
Transmission Case Clutch Plate, Spline Wear (Notching)1.150 mm0.0450 in
Input Internal Ring Gear, Maximum Spline Wear (Notching)0.130 mm0.0051 in
Input Carrier Assembly Bushing, Maximum ID50.690 mm1.9957 in
Input Carrier Assembly Thrust Washers Thickness1.490 mm0.0590 in
Input Carrier Assembly Pinion Maximum End Play1.060 mm0.0417 in
Intermediate Internal Ring Gear, Maximum Spline Wear (Notching)0.130 mm0.0051 in
Intermediate Internal Ring Gear Thrust Washer Thickness1.490 mm0.0590 in
Intermediate Carrier Assembly Pinion Maximum End Play1.060 mm0.0417 in
Intermediate Carrier Bushing, Maximum ID37.940 mm1.4937 in
Output Carrier Internal Ring Gear, Maximum Spline Wear (Notching)0.130 mm0.0051 in
Output Carrier Assembly Pinion Maximum End Play1.060 mm0.0417 in
Main Shaft Pilot, Minimum OD (Turbine Shaft and Output Shaft)19.987 mm0.7869 in
Main Shaft Journal, Minimum OD (Intermediate Carrier Bushing)36.405 mm1.4333 in
Output Shaft Bushing (2WD and 4WD), Maximum ID20.130 mm0.7925 in
Output Shaft (2WD and 4WD), Minimum Bearing Surface OD44.978 mm1.7708 in
Park Pawl Gear Wear0.000 mm0.0000 in
Output Yoke, Output Seal Surface, Minimum OD65.080 mm2.5622 in

Wear Limits

Fluid Capacity Specifications

TransmissionInitial FillRefill
LitersQuartsLitersQuarts
Allison 10001212.777.4

Fluid Quantities

Pressure Switch Manifold (PSM) Logic

RangePressure Switch 1- N/OPressure Switch 2- N/OPressure Switch 3- N/OPressure Switch 4- N/C
Switch StatusScan Tool StatusSwitch StatusScan Tool StatusSwitch StatusScan Tool StatusSwitch StatusScan Tool Status
ROpenHIGH*ClosedLOWClosedLOWClosedLOW
NClosedLOWClosedLOWClosedLOWOpenHIGH
1OpenHIGHClosedLOWOpenHIGHOpenHIGH
2OpenHIGHOpenHIGHOpenHIGHOpenHIGH
3ClosedLOWOpenHIGHOpenHIGHOpenHIGH
4ClosedLOWOpenHIGHClosedLOWOpenHIGH
5OpenHIGHOpenHIGHClosedLOWOpenHIGH
6OpenHIGHOpenHIGHClosedLOWOpenHIGH
N/C = Normally Closed N/O = Normally Open * Pressure switch 1 (PS1) reverts to the Closed/LOW state with throttle applied in REVERSE.

Pressure Switch Manifold (PSM) Logic

Transmission Internal Mode Switch Logic

RangeABCP
POFFONONOFF
R TransitionalOFFOFFONOFF
ROFFOFFONON
NONOFFONOFF
D TransitionalONOFFOFFOFF
DONOFFOFFON
*MOFFOFFOFFOFF
D1 TransitionalOFFONOFFOFF
1OFFONOFFON
InvalidONONONON
InvalidONONONOFF
InvalidOFFONONON
InvalidONOFFONON
InvalidOFFOFFOFFON
InvalidONONOFFON
ON = Open Circuit OFF = Grounded Circuit *M mode allows TAP Up/TAP Down feature functionally between 1st through 6th ranges. In this range, logic states do not change.

Transmission Internal Mode Switch Logic

Solenoid and Clutch Chart (PCS1, PCS2, SS1, SS2, and SS3)

Range StatusLogic StateClutch to LinePressure Control SolenoidsShift Solenoids
PCS1PCS2SS1SS2SS3
Steady StateR Sump Temp below -25°CLow/Reverse ClutchDe-energized; 3rd, 5th, and Reverse Clutch AppliedDe-energized; ExhaustedONONON
Garage ShiftR-N Sump Temp below -25°CLow/Reverse ClutchEnergizing; 3rd, 5th, and Reverse Clutch Trimming OffDe-energized; ExhaustedONONON
Garage ShiftN-R Sump Temp below -25°CLow/Reverse ClutchDe-energizing; 3rd, 5th, and Reverse Clutch Trimming OnDe-energized; ExhaustedONONON
Steady StateN or PNoneDe-energized; Low and Reverse Clutch AppliedDe-energized; ExhaustedONONON
Garage ShiftN-1NoneDe-energized; Low and Reverse Clutch AppliedEnergizing; 1-2-3-4 Clutch Trimming OnONONON
Garage Shift1-N1-2-3-4 ClutchDe-energized; Low and Reverse Clutch AppliedDe-energized; ExhaustedOFFONOFF
Steady State11-2-3-4 ClutchDe-energized; Low and Reverse Clutch AppliedDe-energized; 2-6 Clutch ExhaustedOFFONOFF
Upshift1-21-2-3-4 ClutchEnergizing; Low and Reverse Clutch Trimming OffEnergizing; 2-6 Clutch Trimming OnOFFONOFF
Downshift2-11-2-3-4 ClutchDe-energizing; Low and Reverse Clutch Trimming OnDe-energizing; 2-6 Clutch Trimming OffOFFONOFF
Steady State21-2-3-4 ClutchEnergized; 3rd, 5th, and Reverse Clutch ExhaustedEnergized; 2-6 Clutch AppliedOFFOFFOFF
Upshift2-31-2-3-4 ClutchDe-energizing; 3rd, 5th, and Reverse Clutch Trimming OnDe-energizing; 2-6 Clutch Trimming OffOFFOFFOFF
Downshift3-21-2-3-4 ClutchEnergizing; 3rd, 5th, and Reverse Clutch Trimming OffEnergizing; 2-6 Clutch Trimming OnOFFOFFOFF
Steady State31-2-3-4 ClutchDe-energized; 3rd, 5th, and Reverse Clutch AppliedDe-energized; 4-5-6 Clutch ExhaustedONOFFOFF
Upshift3-41-2-3-4 ClutchEnergizing; 3rd, 5th, and Reverse Clutch Trimming OffEnergizing; 4-5-6 Clutch Trimming OnONOFFOFF
Downshift4-31-2-3-4 ClutchDe-energizing; 3rd, 5th, and Reverse Clutch Trimming OnDe-energizing; 4-5-6 Clutch Trimming OffONOFFOFF
Steady State44-5-6 ClutchEnergized; 3rd, 5th, and Reverse Clutch ExhaustedEnergized; 1-2-3-4 Clutch AppliedONOFFON
Upshift4-54-5-6 ClutchDe-energizing; 3rd, 5th, and Reverse Clutch Trimming OnDe-energizing; 1-2-3-4 Clutch Trimming OffONOFFON
Downshift5-44-5-6 ClutchEnergizing; 3rd, 5th, and Reverse Clutch Trimming OffEnergizing; 1-2-3-4 Clutch Trimming OnONOFFON
Steady State54-5-6 ClutchDe-energized; 3rd, 5th, and Reverse Clutch AppliedDe-energized; 2-6 Clutch ExhaustedOFFOFFON
Upshift5-64-5-6 ClutchEnergizing; 3rd, 5th, and Reverse Clutch Trimming OffEnergizing; 2-6 Clutch Trimming OnOFFOFFON
Downshift6-54-5-6 ClutchDe-energizing; 3rd, 5th, and Reverse Clutch Trimming OnDe-energizing; 2-6 Clutch Trimming OffOFFOFFON
Steady State64-5-6 ClutchEnergized; 3rd, 5th, and Reverse Clutch ExhaustedEnergized; 2-6 Clutch AppliedOFFOFFON
Steady StateR -25°C < Temp < 20°CNoneDe-energized; 3rd, 5th, and Reverse Clutch AppliedEnergized; Low and Reverse Clutch AppliedONONON
Garage ShiftR-N -25°C < Temp < 20°CNoneDe-energized; Low and Reverse Clutch AppliedDe-energized; ExhaustedONONON
Garage ShiftN-R -25°C < Temp < 20°CNoneDe-energizing; 3rd, 5th, and Reverse Clutch Trimming OnEnergized; Low and Reverse Clutch AppliedONONON
Steady StateR Temp > 20°CNoneDe-energized; Low and Reverse Clutch AppliedEnergized; 3rd, 5th, and Reverse Clutch AppliedOFFONON
Garage ShiftR-N Temp > 20°CNoneDe-energized; Low and Reverse Clutch AppliedDe-energizing; 3rd, 5th, and Reverse Clutch Trimming OffOFFONON
Garage ShiftN-R Temp > 20°CNoneDe-energized; Low and Reverse Clutch AppliedEnergizing; 3rd, 5th, and Reverse Clutch Trimming OnOFFONON

Solenoid and Clutch Chart (PCS1, PCS2, SS1, SS2, and SS3)

Solenoid and Clutch Chart (TCC PCS)

Engine ModeRange1st2nd3rd
% TPS255010025501002550100
LML NormalOFFOFFOFFOFFOFFOFF -> ONOFFOFF -> ONON
LGH NormalOFFOFFOFFOFFOFFOFF -> ONOFF -> ONOFF -> ONON
LML Tow/HaulOFFOFFOFFOFF -> ONOFF -> ONOFF -> ONONONON
LGH Tow/HaulOFFOFFOFFOFF -> ONOFF -> ONOFF -> ONONONON

Solenoid and Clutch Chart (TCC PCS - Range 1-3)

Engine ModeRange4th5th6th
% TPS255010025501002550100
LML NormalOFFONONOFF -> ONONONONONON
LGH NormalONONONONONONONONON
LML Tow/HaulONONONONONONONONON
LGH Tow/HaulONONONONONONONONON

Solenoid and Clutch Chart (TCC PCS - Range 4-6)

Shift Speed (1-2 and 2-3 Shifts)

1-2 Shift Output Shaft RPM2-3 Shift Output Shaft RPM
Engine% of TPS122550100122550100
Mode
LML6.6LNormal425450722N/A*8678671199N/A*
LGH6.6LNormal433435690N/A*8678671175N/A*
LML6.6LTow/Haul549549722N/A*112711271358N/A*
LGH6.6LTow/Haul549549722N/A*112711271358N/A*
*Varies based on vehicle acceleration

Shift Speed (1-2 and 2-3 Shifts)

Shift Speed (3-4, 4-5, 5-6, and CT Downshifts)

3-4 Shift Output Shaft RPM4-5 Shift Output Shaft RPM5-6 Shift Output Shaft RPMClosed Throttle Downshift Output Shaft RPM
6-55-44-33-22-1
Engine% of TPS1225501225501225500000N/A*
Mode
LML6.6LNormal10531156119914501503213921002150260017251416954712N/A*
LGH6.6LNormal112712721676166017022100210021002575163114071000712N/A*
LML6.6LTow/Haul1561156118212196219623992630263028612312205215031098N/A*
LGH6.6LTow/Haul1561156118212196219623992630263028612312205215031098N/A*
*Varies based on vehicle deceleration

Shift Speed (3-4, 4-5, 5-6, and CT Downshifts)

Line Pressure

RangeLine Pressure @ 600 RPMLine Pressure @ 1500 RPM
Neutral Converter550-730 kPa (80-106 PSI)570-1, 230 kPa (83-178 PSI)
Neutral LU550-800 kPa (80-116 PSI)600-1, 390 kPa (87-202 PSI)
Reverse Converter590-780 kPa (86-113 PSI)1, 245-1, 400 kPa (181-203 PSI)
1st Converter520-765 kPa (75-111 PSI)890-1, 190 kPa (129-173 PSI)
2nd Converter485-760 kPa (70-110 PSI)860-1, 180 kPa (125-171 PSI)
3rd Converter490-760 kPa (71-110 PSI)760-1, 190 kPa (110-173 PSI)
4th Converter560-770 kPa (81-112 PSI)620-1, 230 kPa (90-178 PSI)
5th Converter560-770 kPa (81-112 PSI)800-1, 230 kPa (116-178 PSI)
6th Converter560-770 kPa (81-112 PSI)740-1, 230 kPa (107-178 PSI)

Line Pressure

End Play Specifications

ApplicationMaximum End Play
MetricEnglish
New Torque Converter0.800 mm0.0310 in
Used Torque Converter1.200 mm0.0472 in
Input Carrier and Thrust Washer1.010 mm0.0400 in
Intermediate Carrier and Thrust Washer1.010 mm0.0400 in
Output Carrier and Thrust Washer1.010 mm0.0400 in
Turbine Shaft1.549 mm0.0610 in

End Play Specifications

Selective Components Specifications

IdentificationPlate Thickness
MetricEnglish
242011.1-11.9 mm0.4370-0.4685 in
852111.54-12.34 mm0.4543-0.4858 in
8522 (6222)11.98-12.78 mm0.4717-0.5031 in
8523 (6223)12.43-13.23 mm0.4894-0.5209 in
8524 (6224)12.88-13.68 mm0.5071-0.5386 in

1-2-3-4 Clutch Backplate

Dimension CThicknessIdentification
MetricEnglishMetricEnglish
1.008-1.184 mm0.0397-0.0466 in0.245-0.295 mm0.0096-0.0116 in0 Holes
1.185-1.414 mm0.0467-0.0557 in0.475-0.525 mm0.0187-0.0207 in1 Hole
1.415-1.644 mm0.0557-0.0647 in0.705-0.755 mm0.0278-0.0297 in2 Holes
1.645-1.874 mm0.0648-0.0738 in0.935-0.985 mm0.0368-0.0388 in3 Holes
1.875-2.104 mm0.0738-0.0828 in1.165-1.215 mm0.0459-0.0478 in4 Holes
2.105-2.334 mm0.0829-0.0919 in1.395-1.445 mm0.0549-0.0569 in5 Holes
2.335-2.510 mm0.0919-0.0988 in1.625-1.675 mm0.0640-0.0659 in6 Holes

Low and Reverse Clutch Piston Housing Selective Shim

Minimum ThicknessIdentification
MetricEnglish
2.435 mm0.0959 in2

Low and Reverse Clutch Steel Plate Minimum Thickness

Dimension CIdentification
MetricEnglish
35.3-35.86 mm1.393-1.412 in1
35.87-36.36 mm1.413-1.431 in2
36.37-37.27 mm1.432-1.467 in3

Low and Reverse Clutch Steel Selective Plate

Oil Pump Specifications

Part MeasuredSpecification
MetricEnglish
Bushing, Maximum ID IMPORTANT: The pump bushing must have a complete burnt-orange color Teflon® coating. If any portion of the Teflon® coating is worn and bronze material is visible, replace the pump.58.458 mm2.3015 in
Drive Gear, Maximum Distance Between Flats52.165 mm2.0537 in
Drive Gear, Maximum Side Clearance0.074 mm0.0029 in
Driven Gear, Minimum OD109.987 mm4.3302 in
Driven Gear, Maximum Side Clearance0.074 mm0.0029 in
Driven Gear/Crescent Tooth, Maximum Clearance0.264 mm0.0104 in
Driven Gear to Oil Pump Body, Maximum Diametrical Clearance0.229 mm0.0090 in
Oil Pump Body Gear Cavity, Maximum Depth22.245 mm0.8758 in
Oil Pump Body Gear Cavity, Maximum ID110.216 mm4.3392 in
Wear Plate, Minimum Thickness2.950 mm0.1161 in
IMPORTANT
The pump bushing must have a complete burnt-orange color Teflon® coating. If any portion of the Teflon® coating is worn and bronze material is visible, replace the pump.

Oil Pump Specifications