![]() I just cleaned the gasket really well and reused it. Really easy to replace the encoder motor after removing the front propeller shaft and lower shield. I OHMed out the encoder motor and it is bad. Using a cheap bluetooth OBD reader and Car Gauge Pro on Android, it showed me the C0310 code. Personally I would stick with the blue AT2, and can even be purchased cheaper than the Valvoline 855459.Ĭ0310 Motor A/B Circuit Open 'Service AWD' light This would also apply if it was taken in for service and they noticed that it was red they would want to change it out because of the previously mentioned binding issues. HOWEVER, it is red, so you would have no idea if what you were draining is regular ATF that is not Auto Trak II compatible or if it was the Valvoline. ![]() Valvoline also states that it's Valvoline Maxlife Multi-Vehicle Transmission Fluid is recommended to replace Dexron II/III/VI and Autotrak II, so could be a universal fill for our vans. It appears that Valvoline states that their universal transfer case fluid, Valvoline Transfer Case Fluid Part # 855459(~$10 a quart) is compatible with Auto Trak II. GMpartsDirect has the best prices but you have to order 12, other online retailers had it but the shipping cost(up to $20) was way out of line.īoth local dealers said they charge $8.95 a liter plus tax, but no shipping However, when I went to buy, they only charged me $7.16 a liter. Mine sells AC 104017 $9.69 a liter.ĪC Delco distributors will usually carry it as well, if you have any locally. ![]() Some independent NAPA stores carry it as well, have to call to find out if they carry it. Prices are from the last time I looked and can change so make sure to do your research.ĪCDeclo 773494 $6.26 ($7.45 shipping for 2) If you have issues with your NV136 and want to switch to the older full time BW4472 case, you will need the case and both front and rear prop/driveshafts to swap into your newer van.Īuto Trak II(AT2) Transfer Case Fluid GM 88900402 ACDeclo 773494 (used to be GM 12378508) is available at: The transfer case on the 99-05 vans uses just under 2 liters of AutoTrak2 fluid(it's blue in color), NOT REGULAR ATF, make sure to use the right stuff. If removing the encoder motor still doesn't correct the problem, then the transfer case clutch pack has to be re-shimmed.ĩ9-05 encoder motor: Rectangular Plug w/2 Pins, Fits New Venture Gear 136/236/246, RPO Code NP4 (All Wheel Drive Transfer Case) Torque to 15ftlbs.ĩ9-05 Transfer case actuator(encoder motor)insulator and front shaft spline seal (Shaft To Yoke)GM 12544077 If that doesn't help, remove the encoder motor. If changing the fluid doesn't help, and you are still getting binding/chirping then first remove the ATC(TCCM) fuse located in the under hood convenience center. Note that the clutch packs can hold the old fluid for several hundred miles. Second step is to replace the fluid with AT2, then do a bunch of figure 8s, put 50-100miles on it, and then replace the fluid again with AT2. First check tires for even wear and pressure, rotate/swap tires around. If you are having low speed binding/chirping/shutter/etc, a common cause is using the wrong or contaminated fluid. Uses ONLY AutoTrak2 fluid! You can also install the Borg-Warner case in place of New Venture case, you would just need to grab the front and rear propeller/drive shafts that fit the Borg-Warner case. Can be disabled by removing the Automatic Transfer Case 20amp fuse in the under hood convenience center. It's engaged by the encoder motor only when the computer detects slip. Chain (1.75" Wide) 43 Links (1 Blue Link) - HV033ĩ9-05 uses the New Venture Gear NV136, uses AutoTrak2 fluid, is a single speed, clutched, electronically controlled transfer case. 1990-1995 and the 1996-1998 use a different size transmission flange. 20-25lbft to turn a viscous clutch, too loose and it will slip, if it's seized it will create binding/wheelhop. ![]() It's engaged all of the time, no exceptions and can not be disabled. The BW4472 is a single speed, chain drive, two-piece aluminum cased, viscous clutch type transfer case. 90-98 used a Borg-Warner 4472 full time AWD transfer case, uses regular ATF. ![]()
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