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Fig. 52: Magna Transfer Case Bar Code Label TRANSFER CASE DESCRIPTION AND OPERATION The Magna Powertrain (MP) 1222/1225/1226, RPO NQG transfer case is a 2-speed, part-time The 4 manual mode, or range gear positions, of the MP 1222/1225/1226 transfer case are: 2HI - 2 wheel drive high range 4HI - 4 wheel drive high range, part-time 4LO - 4 wheel drive low range, 2.68:1 gear ratio reduction N - NEUTRAL, 4 wheel When the ignition switch is placed in the run position and the 4WD shift lever is in the 4WD Callout Component Name 1 Component Identifier 2 GM Broadcast Code 3 Supplier Code 4 Production Year 5 Julian Date of the Year 6 Assembly Line Number 7 Sequential Number
2008 Chevrolet Silverado 1500 2008 TRANSMISSION Transfer Case - MP 1222/1225/1226-NQG - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
transfer case is in low range. When the vehicle is in low range, the transmission control module During normal driving situations, the transfer case can operate in the 2WD mode. The driver may The transmission is in NEUTRAL. The vehicle speed is less than 5 km/h (3 mph). This transfer case also has a NEUTRAL position. A shift to the NEUTRAL position allows the The transmission is in NEUTRAL. The vehicle speed is less than 5 km/h (3 mph). The NQG transfer case is available in 3 variations, depending on the engine and transmission MP 1222/1225/1226 Variations Model Transmission Input Output Shaft Chain Size Chain Series Hi/Low Planetary Application MP 1222 M30 - 4L60-E 27T Spline 32T Spline 7/16 X 9600 Series Rocker Pin Chain 3 Pinion K1 MP 1225 MYD - 6L90 29T Spline 31T Spline 7/16 X 1.5 in 9600 Series Rocker Pin Chain 5 Pinion K2 MP 1226 MYD - 6L90 2300
2008 Chevrolet Silverado 1500 2008 TRANSMISSION Transfer Case - MP 1222/1225/1226-NQG - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
All Canadian MP1225 Transfer Cases will be equipped with the 2300 series round pin chain. Additional differences in these models are listed below: MP1222 The input shaft seal is a dual lip seal used with wet cavity adapters. The input shaft pilot bearing assembly is smaller to accommodate the smaller rear output The high/low clutch has bias pointing engagement teeth, the leading edge of the teeth are not The rear output shaft is smaller. The front output shaft drive sprocket is 31.75 mm (1.25 in) wide. The front output shaft driven sprocket is 31.75 mm (1.25 in) wide. The rear output shaft rear bearing retaining rings are smaller, the outer diameter of the ring The rear output shaft rear bearing assembly is smaller, the inner diameter measures 40 mm The rear output shaft seal is smaller, the inner lip diameter measures 46.2 mm (1.819 in). The rear output shaft bushing is smaller, the inner diameter measures 48 mm (1.890 in). The rear case half has smaller bores to accommodate the rear output shaft seal and the rear MP 1225 The input shaft seal is a single lip seal used only with dry cavity adapters. MP 1226 The input shaft seal is a dual lip seal used specifically for the MW7 which has a wet cavity MP 1225/1226 Heavy MW7 - 29T Spline 31T Spline 7/16 X 1.5 in Series Round Pin Chain 5 Pinion K2, K3
2008 Chevrolet Silverado 1500 2008 TRANSMISSION Transfer Case - MP 1222/1225/1226-NQG - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
The input shaft pilot bearing assembly is larger to accommodate the larger rear output shaft, An input shaft pilot bearing retaining ring is used. The high/low clutch has neutral pointing engagement teeth, the leading edge of the teeth are The rear output shaft is larger. The front output shaft drive sprocket is 38.1 mm (1.5 in) wide. The front output shaft driven sprocket is 38.1 mm (1.5 in) wide. The rear output shaft rear bearing retaining rings are larger, the outer diameter of the ring The rear output shaft rear bearing assembly is larger, the inner diameter measures 41 mm The rear output shaft seal is larger, the inner lip diameter measures 54.2 mm (2.134 in). The rear output shaft bushing is larger, the inner diameter measures 56.08 mm (2.208 in). The rear case half has larger bores to accommodate the rear output shaft seal and the rear 2WD Mode Power Flow
2008 Chevrolet Silverado 1500 2008 TRANSMISSION Transfer Case - MP 1222/1225/1226-NQG - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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