Starting with the 2007 model year, General Motors introduced a series of new transfer cases built by Magna Powertrain replacing the New Venture Gear units used in the past. Check out our aftermarket components and remanufactured assemblies for these MP transfer cases.
The new units are available in the models below:
| MODEL | ProActive Gear Part # | RPO | TRANS | Input Shaft Splines | Output Shaft Splines | Chain Size | Application | | MP1222LD | PG1222-1 | NQG | 4L60E | 27T | 32T | 7/16-1.25" | 1/2 Ton | | MP1222LD | PG1222-2 | NQG | 6L80 | 32T | 32T | 7/16-1.25" | 1/2 Ton | | MP1225HD | PG1225GM-1 | NQG | 6L90 | 29T | 31T | 7/16-1.5" | 3/4 Ton | | MP1226SD | PG1226GM-2/PG1226GM-3 | NQG | 6L90LCT1000 | 29T | 31T | 7/16-1.5" | 3/4-1 Ton | | MP1625HD | PG1625-1 | NQF | 6L90 | 29T | 31T | 7/16-1.5" | 3/4 Ton | | MP1626SD | PG1626-2/ PG1626-3 | NQF | 6L90LCT1000 | 29T/33T | 31T/32T | 7/16-1.5" | 3/4-1 Ton | | MP3023LD | PG3023-1 | NQH | 4L60E | 27T | 32T | 7/16-1.25" | 1/2 Ton | | MP3023LD | PG3023-2 | NQH | 2ML70 | 32T | 32T | 7/16-1.25" | 1/2 Ton | | MP3024HD | PG3024-1 | NQH | 6L90 | 29T | 31T | 7/16-1.5" | 3/4 Ton |
| NQG: Transfer Case, Manual Shift, Floor Mounted Shifter | | NQF: Transfer Case, Electronic shift with dial control | | NQH: Transfer Case, Auto/Active Shift, 2-Speed | | **All models use Dexron VI fluid |
| Common Problems | | | | | | | 3023/3024 | Shift lever bearing failure: Bearings are overheated due to the lever balls being placed off center from the lever, resulting in uneven pressure on the bearing. Typically only the 3023LD experienced this problem, GM fixed this by only using the HD levers with thicker collars and 10MM balls (vs 13MM) to apply pressure evenly. ProActive Gears only makes the HD levers to be used with 10MM lever balls, which will work in both transfer cases. | | | | All Cases | Grinding, popping out of gear: caused by worn range forks and its pads due to contact area available. ProActive Gear range forks and mating high/low clutches are made with a wider flange on the slider and increased fork area to compliment this increased contact area. These will also fit previous models without the increased contact area. | | All Cases | Mainshaft snap ring failure causing collateral damage within the transfer case. ProActive Gears has made a Heavy Duty snap ring to fit all mainshafts to correct this issue. |
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