Description
QU12136 BW4446 8-Bolt Front Case Half for most 2012-current Ram 3500, Ram 4500, and Ram 5500 4x4 trucks with Aisin AS69RC Automatic Transmissions. QU12136 is a brand-new genuine Borg Warner Front Case Sub-Assembly for most 2012-current Ram 3500-5500 Pickup and Chassis Cab 4x4s with Aisin Automatic Transmissions and Borg Warner 44-46 Electric Shift Transfer Cases. Note: for 2019 and newer models, QU12136 ONLY fits SRW Pickups with the High Output Cummins engine AND Chassis-Cab trucks with either 4.10 or 4.44 axle ratios. QU12136 includes these factory assembled parts: Front Housing, Input Seal, 70mm ID Input Bearing, Input Seal, Front Output Seal, Front Output Front Bearing, 2 Case Alginment Pins, and 8 Front Mounting Studs. Assembled in Mexico by Borg Warner using global components.
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Dan the Gear Man® Tech Notes:
Do I Have a BW4446 or BW4448 Transfer Case in my Chassis Cab?
2019-up Cummins High Output Pickup
Applications
Tech Note 1: Do I Have a BW4446 or BW4448 Transfer Case in my Chassis Cab?
Starting in 2019, RAM used two similar looking but different 70mm Input Bearing, 8-Bolt Mounting, electric shaft Borg Warner transfer cases in RAM 3500, RAM 4500 and RAM 5500 chassis cab 4x4 trucks. RAM parts listings show both types as 44-46 models, however, RAM factory Service Manuals show them as 44-46 and 44-48. QU12136 only fits the 44-46 8 Bolt applications which are found in 2019-up RAM 3500/4500/5500 Cummins Diesel Chassis Cab trucks with either 4.10 or 4.44 axle ratios and the same chassis cab models with the 6.4L Hemi gas engine and any axle ratio.
Tech Note 2: 2019-up Cummins High Output DRW Pickup
2019 and newer RAM 3500 Dual Rear Wheel (DRW) PICKUPS with the Cummins High Output Diesel Engine and electric shift transfer case have a BW4448 transfer case with 8 bolt mounting. 2019-up RAM 3500 4x4 Pickups equipped with the High Output Cummins Engine AND Single Rear Wheel use a BW4446 with 8-Bolt Mounting. All other 2019-up RAM 2500, RAM 3500 4x4 PICKUPS with either gas engines or the standard Cummins Diesel and an electric shift transfer case use a 6-bolt mounting BW4446.
Tech Note 3: Matching Parts
Saved for Future Use
Applications
RAM 3500 SRW Pickup with High Output Cummins Diesel Engine:
2019, 2020, 2021, 2022, 2023, 2024
RAM 3500-5500 Chassis Cab:
BW4446: 2012, 2013, 2014, 2015, 2016, 2017, 2018
BW4446 and Diesel with either 4.10 or 4.44 Ratio Axles: 2019, 2020, 2021, 2022, 2023, 2024
BW4446 and 6.4L Hemi: 2019, 2020, 2021, 2022, 2023, 2024
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