tranfer case model

[tony33]

Hello friends
I drive a 1500 2003 chevy extended cab 4wd whats model its my tranfer case? there;not tags o identificacion plate but a have the round button auto,4lo,4hi,2w i asume have the autotrac sistem but i tried to do an oil change for tranfer case and found red oil like transmision fluid i drive my last car was a 1500 4wd chevy pickuo 2001 and use a blue color transfer case fluid my question is i have a diferent model tranfer case? o somebody mess out my truck? I have two month old with this truck

[truckdude239]

most of the t-cases use the new dexron 5 on chevys,

[clinebarger]

NVG 149-NP3 Manual Transmission Fluid GM P/N 88861800

NVG 246-NP8 Auto-Trak II, transfer case fluid, GM P/N 88900402

NVG 261-NP2 Manual Transmission Fluid GM P/N 88861800

NVG 263-NP1 Manual Transmission Fluid GM P/N 88861800

If you have a Auto-Trak use the GM Fluid, All other transfer cases use Dexron III.

Since "Money Hungry" GM introduced Dexron IV, Dexron III is being phased out as a product name. It was renamed Manual Transmission Fluid part # 88861800

DO NOT use Dexron VI in place of Dexron III/manual transmission fluid in any manual transmissions or transfer cases that specify Dexron III, as a failure may result.

NP1, NP2, NP3 & NP8 are RPO codes......Look in your gloveblox & know for sure what case you have

[biggsteve97]

Originally Posted by tony33

Hello friends
I drive a 1500 2003 chevy extended cab 4wd whats model its my tranfer case? there;not tags o identificacion plate but a have the round button auto,4lo,4hi,2w i asume have the autotrac sistem but i tried to do an oil change for tranfer case and found red oil like transmision fluid i drive my last car was a 1500 4wd chevy pickuo 2001 and use a blue color transfer case fluid my question is i have a diferent model tranfer case? o somebody mess out my truck? I have two month old with this truck

You have the Auto-trac transfercase if you have the Auto button. The original Auto-trac fluid used until roughly 2003-2004 was red however the replacement Auto-Trac II fluid is blue and unfortunately seems to be only available at the GM dealer. The new fluid is supposed to protect better than the red fluid.

[truckdude239]

Originally Posted by clinebarger

DO NOT use Dexron VI in place of Dexron III/manual transmission fluid in any manual transmissions or transfer cases that specify Dexron III, as a failure may result.

crap wish i had known that when we did the 100k on our 03 s-10 zr2 the dealer told us to fill the tcase with dexron vi