Interim Model Year Design Change - NQF/NQG/NQH Front Case Half Assembly, Input Shaft, Planetary Carrier High/Low Clutch

WARNING: This page is about a different car, the 2012 GMC Yukon XL, 2012 GMC Yukon, 2012 Chevrolet Tahoe, and 2012 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Interim Model Year Design Change - Front Case Half Assembly, Input Shaft And Planetary Carrier High/Low Clutch

Courtesy of GENERAL MOTORS COMPANY

Interim 2012 model year for Magna transfer case RPOs NQF / NQG / NQH, a second-design front case half assembly (1), planetary internal gear (2), gear retaining ring (3), locking plate (4), thrust washer (5), input shaft (6), pilot bearing (7), thrust washer (8), high/low planetary carrier (9), and high/low clutch (10) were implemented into second-design assemblies.

The second-design carrier (9) has a reduced OD dimension and the planetary internal gear (2) has a reduced ID dimension. The planetary internal gear (2) is a press-fit non-serviceable component and must be serviced with the front case half assembly. In service it is possible that a new or remanufactured transfer case may contain first or second-design content. For service, the first-design 2007-2012 Magna NQF, NQG, and NQH components will remain available individually to perform a repair on a first-design assembly.

If a second-design transfer case has been installed into a vehicle that originally contained a first-design assembly, TCCM reprogramming is not required.