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  1. #11

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    I lied its the NP243 t-case. I bought the fluids today as well as took some current pics.

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    Yah I mainly use Valvoline in the truck because they have all my needed fluids and are certified by GM to have Dexron IV and meet Dexros1 oil requirements. I just need to save and put Valvoline Dexron IV in the tranny and maybe do the rear end by summers end even tho it was done last year.
    Attached Thumbnails Attached Thumbnails IMG_20130615_211310_064.jpg   IMG_20130615_211303_637.jpg  

    1996 Chevy Tahoe LT 5.7L V8 4X4 205,000+ miles. Built proudly at Janesville Assembly in Janesville, Wisconsin
    Basic mods: Lights all over, bunch of electrical work, and a couple cooling mods.

    Check out my other mods in My Garage: http://www.gmtruckclub.com/forum/sho...t-Tahoe-4-Door

  2. #12
    Former Member
    Join Date
    Apr 2012
    Location
    Reading, PA
    Posts
    291

    Default

    Quote Originally Posted by Conlan Rose View Post
    I lied its the NP243 t-case. I bought the fluids today as well as took some current pics.

    IIRC, NP241 is the manually shifted version and the NP243 is the solenoid shifted version...it is not an automatic transfer case, it is simply a manual transfer case shifted by solenoids. ATF is what you want for a NP241 for sure...

    Pretty much all the NPs were designated this way...NP2X1 is a manual lever, NP2X3 is the solenoid shifted.

  3. #13

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    Quote Originally Posted by steved View Post
    IIRC, NP241 is the manually shifted version and the NP243 is the solenoid shifted version...it is not an automatic transfer case, it is simply a manual transfer case shifted by solenoids. ATF is what you want for a NP241 for sure...

    Pretty much all the NPs were designated this way...NP2X1 is a manual lever, NP2X3 is the solenoid shifted.
    You are correct. There are no clutch packs like the Auto Trak t case. As you see I got the ATF and personally I got full synthetic Dexron-VI which is the superseding fluid of Dexron III.

    1996 Chevy Tahoe LT 5.7L V8 4X4 205,000+ miles. Built proudly at Janesville Assembly in Janesville, Wisconsin
    Basic mods: Lights all over, bunch of electrical work, and a couple cooling mods.

    Check out my other mods in My Garage: http://www.gmtruckclub.com/forum/sho...t-Tahoe-4-Door

  4. #14
    Legend

    Join Date
    Sep 2010
    Location
    everett, massachusetts
    Posts
    1,323

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    Quote Originally Posted by Conlan Rose View Post
    I think the first Auto-Trak T case was in 98 on the Tahoe and Burban.
    I have the OEM shop manual for my 2000 silverado 4X4 PU. the fluid it says to use is DEXRON III. now on having a clunk issue with the drive shaft the service manager informed me that DEXRON III is not to be used in this transfercase. auto 4WD/4WD hi/lo 2WD push button .

    the fluid that was installed at the factory was the autotrac II. autotrac II costs the same as synthetic tranny fluid/QT. clutches need this type fluid.

    on your transfercase I believe GM now has a fluid that is specific for your transfercase. DEXRON III is now no longer a licensed GM fluid for any useage. also DEXRON VI is a lower viscosity than DEXRON III. The fluids are different.

    it is a little tricky so using your vin# the dealership will give you the updated correct fluid to use.

    always open the fill first before draining. never over torque these plugs as some have had the case crack..........

  5. #15

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    does the front diff. need the posi additive like the rear one does?
    Gas was $1.83 when Obama took office.....

  6. #16

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    Quote Originally Posted by K15 Blazer Guy View Post
    does the front diff. need the posi additive like the rear one does?
    No because its not a posi but I might look for anti chatter additive because while testing the 4x4 in the heavy rain on decel the front chattered a lot.

    I filled the t-case with the exact amount of fluid that was recemended because all of the fluid came out, thanks to New Process' great drain plug design.

    I filled the diff until is was 1/2 an inch from the hole from what I could tell. May need to check again to make sure it has enough fluid. I did add about .5pts less then the exact amount of fluid.

    I will post pics soon its been a hell of a great day!

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    Last edited by Conlan Rose; 06-18-2013 at 06:17 AM.

    1996 Chevy Tahoe LT 5.7L V8 4X4 205,000+ miles. Built proudly at Janesville Assembly in Janesville, Wisconsin
    Basic mods: Lights all over, bunch of electrical work, and a couple cooling mods.

    Check out my other mods in My Garage: http://www.gmtruckclub.com/forum/sho...t-Tahoe-4-Door

  7. #17

    Default

    very thorough! thanks!
    and crusty lol looks just like mine. im so glad I got that aluminum rear diff cover.

    does the front have some kind of electronic or momentum locking feature though? I though I read that somewhere....
    Gas was $1.83 when Obama took office.....

  8. #18

    Default

    Quote Originally Posted by K15 Blazer Guy View Post
    very thorough! thanks!
    and crusty lol looks just like mine. im so glad I got that aluminum rear diff cover.

    does the front have some kind of electronic or momentum locking feature though? I though I read that somewhere....
    It is electronic but only to engage the drive shaft. The front diff has no locking or limited slip functions in terms of the physical differential gears.

    And thank you. I will be trying to find one soon as well.

    1996 Chevy Tahoe LT 5.7L V8 4X4 205,000+ miles. Built proudly at Janesville Assembly in Janesville, Wisconsin
    Basic mods: Lights all over, bunch of electrical work, and a couple cooling mods.

    Check out my other mods in My Garage: http://www.gmtruckclub.com/forum/sho...t-Tahoe-4-Door

  9. #19

    Default

    amazon was the cheapest.... ill post pics of if soon
    Gas was $1.83 when Obama took office.....

  10. #20

    Default

    Ok sounds good!

    1996 Chevy Tahoe LT 5.7L V8 4X4 205,000+ miles. Built proudly at Janesville Assembly in Janesville, Wisconsin
    Basic mods: Lights all over, bunch of electrical work, and a couple cooling mods.

    Check out my other mods in My Garage: http://www.gmtruckclub.com/forum/sho...t-Tahoe-4-Door

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