B&M Prerunner/Trail Automatic Transmission - LS Engine 4L80E

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Part
B&M 118003BM

The B&M PreRunner/Trail 4L80E automatic transmission is for use with all 1997-Up Chevrolet LS based engines with 2WD. This transmission features a forward pattern manual valve body and includes a B&M finned deep aluminum transmission pan for added fluid capacity and cooling. Features include a steel forward hub, 34 element intermediate sprag, high energy intermediate sprag, all new high performance friction plates, new overdrive sprag assembly, new low roller assembly and rebuilt performance pump. We strongly recommend adding a B&M transmission SuperCooler with your new transmission to help reduce high fluid temps that comes with hard off-road use. Max Recommended Power 800HP and 650 Lb/Ft. Note: This transmission will require an electronic controller such as the B&M Shift Plus 2 Transmission Controller part #120001. Carbureted applications will require a throttle position sensor such as B&M #120002. Does not include a torque convertor or speedometer gear.

  • New High Performance Friction Plates
  • Manual Forward Pattern Valve Body
  • B&M Finned Aluminum Deep Pan
  • Rated to 800HP and 650 FT/LBS
More Information
PartB&M 118003BM
Manufacturer Part Number118003BM
UPC19695954093
BrandB&M
ColorBlack
Drive TypeRWD
Emission Code5
Horsepower Rating Hp800
Part TypeHigh Performance
Torque Rating Ft Lbs650
Transmission Model4L80E
Transmission Speeds4
Transmission Type4L80E
Typeproduct
Valve Body TypeManual

2WD/4WD2WD
Automotive Item GradeHigh Performance
Brake IncludedNo
BrandB&M
Built-In Transmission ShieldNo
California Proposition 65 Chemical NameBenzene
California Proposition 65 RequiredYes
Case MaterialCast Aluminum
ColorBlack
Control TypeElectronic
Cooler includedNo
Core Change ApplicableNo
Dipstick includedNo
Drive TypeRWD
Emission Code5
Friction PlatesNew
Friction Plates:New
Gear Ratio-First2.48
Gear Ratio-Fourth0.75
Gear Ratio-Second1.48
Gear Ratio-Third1.00
Horsepower Rating (HP)800
Horsepower Rating (HP)800
Manual Valve BodyYes
Part TypeHigh Performance
Product TypeAutomatic Transmission Assembly
Reverse Gear Ratio2.07
Reverse PatternNo
Torque Converter IncludedNo
Torque Rating (Ft/Lbs)650
TransbrakeNo
Transmission Model4L80E
Transmission Pan FinishNatural
Transmission Pan MaterialAluminum
Transmission Pan TypeDeep, Cast
Transmission SeriesPrerunner/Trail
Transmission Speeds4
Transmission Type4L80E
Valve Body ConfigurationRecalibrated
Valve Body PatternForward
Valve Body TypeManual
WarningCalifornia Proposition 65

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