Question about 1999 GMC Sierra
Posted by Anonymous on
If you talk to Royal Purple they will tell you that their synchromax oil is perfectly fine to replace the auto Trak 2 fluid I have used it for years never had a problem in fact I think it's a better fluid than the factory fluid
Posted on Sep 18, 2018
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Posted on Jan 02, 2017
The Z71 typically comes with the auto 4wd transfer case (cannot remember the GM number). This requires AutoTrak II, which is available at a GM dealer. Do not use any other fluid in this transfer case! The previous post was correct in the location of the two plugs, but not on the fluid (the other types of transfer cases by GM use ATF). The transfer case is located under the truck right under the cab. There is a small skid plate under it, and a large driveshaft leaves the rear end of the case heading to the rear differential (axle). If you have the manual or electronic w/o auto 4WD transfer case, you can use Dexron III, but Dexron VI is a better fluid that is also now available at your local auto parts store. Again, if you have the AUTO 4WD button in the dash, use the AutoTrak II fluid from the dealer.
Posted on May 22, 2009
You can use the same ATF as the transmission or a synthetic ATF for GM Transmission. Most guys will use normal ATF and mix Lucas ATF transmission additive to it, to make the fluid last longer. Good luck and hope this helps. There was two types of transfer case available to your truck. NP205 takes 5.1 pints NP208 takes 10.0 pints
Posted on Jun 05, 2009
The correct fluid for your transfer is dextron/mercon transmission fluid.To check the fluid level,jack up both ends of the vehicle and be sure to support with jack stands.Make sure vehicle is level.If you look at the rear of the transfer case,you will see two plugs,one lower than the other.Remove the lower plug and if fluid runs out it was overfilled,if nothing runs out,stick your pinky finger in the hole and feel for the fluid level.If it needs fluid,remove upper plug and pour in fluid until it runs out the bottom hole.Then replace plugs and lower vehicle
Posted on Aug 07, 2009
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