Product Description
Build your own rebuild kit for the NP246 / NV236 / NV136 AutoTrac transfer case. GM full-size 4WD with AutoTrac (RPO NP8 on the glovebox SPID label; push-button 2HI/AUTO 4WD/4HI/4LO): 1998-2007 Silverado/Sierra 1500 & 2500 (non-HD), Tahoe/Yukon/Suburban/Avalanche, 1999-2000 Escalade. Pick the overhaul kit that matches your case, then add only the parts you need.
Build your own NP246 rebuild kit: choose the parts that match the transmission on your bench and leave out what you don't need. This builder has 13 option groups and 39 choices, all optional, so the kit holds only what you pick.
Brands offered in this kit include Sonnax, Raybestos.
What you can choose
- Choose Your Overhaul Kit: BK351 NP246 Bearing & Seal Rebuild Kit - AutoTrac NP8 (1998-2007); TSK246 NP246 / NV149 Seal & Gasket Kit only (no bearings)
- Add Sprockets: 401805 Sprocket 48T for 1.25" chain (drive or driven)
- Add Oil Pump & Pump-Rub Case Repair: 371500 Oil Pump Assembly 38-Spline (brass mainshaft seal); BRNY Adapt-A-Case Case Saver Plate NP236/246/261/263; 100246-02K Sonnax Pump Plate Kit NP136/149/236/246/261/263; 482460 Adapt-A-Case Case Saver (washer type, pump to rear case); S411460 Sonnax Case Protector NP136/236/246; 482460HDK Heavy-Duty Billet Case Upgrade Kit; 482463A Pump Pickup Filter & Tube
- Add AutoTrac Clutch Frictions & Steels: R411101 Raybestos Hi-Energy Friction Plate (sold EACH - pack uses ~10); A411101 Friction Plate (sold EACH)
- Add AutoTrac Clutch Drum & Hub: 482235 Clutch Hub Shield
- Add AutoTrac Clutch Return Spring & Wave Washer: 482970 Clutch Pack Return Spring; AT22487 Clutch Pack Wave Washer
- Add Shift Forks & Fork Pads: 411849 Range Fork NP246/NP236; 401841 Clutch Apply Fork (2003-2007); 411850-1A Fork Insert 1.530" Curved; 411850-1 Fork Insert .770" Straight
- Add Range Slider & Planetary: 492645K Range Slider & Hub Kit; D351588A 6-Pinion Input Planet (narrow teeth) - no family text; 411215 Planetary Thrust Washer (2-tab)
- Add Input Shaft: 352670B Input Shaft 27-Spline - 4L60E/4L65E, thin 16mm input bearing (matches 2003-07 #30601 front case); 391670 Input Shaft 32-Spline - 4L80E
- Add Bearings: 411250 Clutch Drum Bearing
- Add Shift Motor / Encoder: A482420 Dorman Shift Motor NP236/NP246 (6-pin + 4-pin connectors); A482420A Dorman Shift Motor NP246 (2-pin connector); T482420A Shift Motor 7-pin, RPO NP8
- Add Seals, Sensors & Small Parts: 411070A Input Seal (double lip); 411074A Rear Output Seal with Boot; 411081A Front Output Seal; A411436 Output Speed Sensor; 401330 Indicator Switch O-Ring; 411490 Vent Tube; 482860 Outer Snap Ring; 482865 Snap Ring
- Add Case / Housing Repair: A411760A-2Q Rear Case #30605 32-Spline Output, aluminum, with bearings; S30606 Rear Case #30605 Magnesium w/ sensor plug; A411760B-1Q Front Case #30601 (2003-2007, electric shift, 16mm input bearing)
