Hi,
I did an oil change today, of the transfercase, oil smells burned!
Is that bad???

 

meh. hows the color looking?

 

3 or 4 button switch on the dash? 3 button uses DexronVI ATF, red in color, there is a pump in the case, but no clutch pack. 4 button uses GM Auto-trak II fluid only, blue in color, there is a pump and a clutch pack in the case.

 

got 4 button, color is almost black.
Does it have an open or sealed viscous coupler?
Is there an exploded vieuw pdf available at the forum?
thx!

 

Your transfer case is an NV236, (2 speed selectable / automatic). The exploded view is on pages 50 & 51 of this link: http://www.areds.com/wp-content/uplo...se-CD-Web1.pdf



The Transfer case requires this fluid:

 

captain,what would we do without you? I guess spent countless hours on google ha. you know the **** us regular blazer "pros" dont know LOL

 

To be quite honest, I just found that pdf online I've got one for the NV233 in my 98 Blazer, but my 04 Blazer has the NV236. I much prefer the NV233 case. Much easier and cheaper to diagnose and repair and it gets better fuel mileage due to less drag in 2WD. I do like the electro vacuum switch on the NV236. No chance of fluid entering the HVAC system, like with the NV231 & NV233 mechanical vacuum switch.

 

Hi all,
Thanks for the info!
I've changed the oil by the Autotrack II oil, so thats finished!
Thanks for the pdf link, however, I still wonder if the clutchpack gets it lubrication from this oil,( ATII) or is it completely sealed with its own lifetime lubricant?
It's hard to see it's "open or closed".
I also did the Dexron III job!
Greetings, Hank.

 

There's a pick-up tube with a filter on the end, you can see it in the exploded view. The pump circulates the fluid through the clutch pack to lubricate and cool it.

 

Thanks captain, now I see it!