MP1626 Transfer Case 2011-2015 Sierra/Silverado 2500/3500, 6.6L Dsl w/ Shift Motor

Description

Actuating heavy diesel electronic transfer modes, Magna MP1626 Diesel Electric Transmission units operate with an electric shift motor and 2.72:1 low reduction for 2011 to 2015 Sierra and Silverado 2500 and 3500 6.6L Duramax trucks. Rated for 445 continuous horsepower with a 4,800 input RPM ceiling, this transfer case stabilizes driveline loads during vessel staging on harbor ramps.

High-tensile die-cast magnesium forms the split transfer case housing, dampening driveline resonance while minimizing overall vehicle mass. Carburized 8620 alloy steel helical planetary gears provide high-ratio torque multiplication, while an electric rotary shift motor positions the internal shift cam. An internal gerotor pump draws fluid from the 1.8-quart sump, feeding pressurized oil to drive sprockets and bearings. Heavy-duty shaft seals protect internal mechanisms against harsh coastal water and sand contamination.

Key Features of Magna MP1626 Diesel Electric

Shipyard fleet mechanics buy Magna MP1626 Diesel Electric marine transmission packages to maintain dependable four-wheel drive power transfer on slick harbor slipways. This transfer case splits rotational torque between front and rear driveline axles during demanding boat retrieval movements.

• 2.72:1 low range gear reduction delivers massive pulling torque on steep slipway ramps
• Electric rotary shift motor executes mode changes via dash-mounted push buttons
• Heavy-duty input shaft couples straight to Allison 1000 six-speed automatic transmissions
• Magna MP1626 Diesel Electric components maintain planetary gear alignment under load
• Internal gerotor oil pump maintains continuous lubrication across mainshaft roller bearings
• Heavy-duty multi-link drive chain transfers torque to front output under heavy load
• Fixed rear output companion flange supports heavy commercial driveshafts without leakage
• Front companion flange connects straight to standard 1410 series universal joint yokes

Electric Diesel Planetary Reduction Dynamics

Operating under medium commercial duty ratings, this transfer case manages 2,650 lb-ft of continuous input torque at 2,000 driveline RPM. The 2.72:1 low range ratio produces tremendous wheel torque while holding transfer case sump operating temperatures between 155°F and 185°F under full load. Heat dissipation across the ribbed magnesium casing reaches 2.8 kW during protracted four-wheel drive ramp work. Planetary helical gear profiles ensure uniform load distribution across tooth flanks, preventing tooth shearing under full engine acceleration.

Diesel Companion Flange Alignment

The fixed rear companion flange connects straight to 1410 series commercial driveshaft universal joints. Opposed tapered roller bearings sustain 4,500 pounds of continuous axial thrust against the rear casing bulkhead. Dial indicator shaft alignment runout must stay below 0.002 inches total indicator reading to prevent output seal failure.

Shift Motor Maintenance Regimen

Check automatic transmission fluid levels through the upper fill plug port prior to engaging four-wheel drive modes under load. As an explicit negative filter, this truck driveline transfer case is not engineered for direct inboard commercial vessel propulsion shafts or marine winch drive drums.

• Inspect transfer case fluid level and casing joint integrity each shift before boat ramp operation
• Examine electric shift motor wiring and transfer case position sensors every 250 hours of fleet use
• Drain Dexron transmission fluid and clean internal oil pump pickup screen every 12 months

Commercial Limited Warranty Roster

Each transfer case unit includes a 1-Year commercial limited warranty against material and manufacturing defects. Crated package contents contain the fully remanufactured transfer case unit, electric shift motor, front companion yoke, rear output flange, and comprehensive installation instructions manual.