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Joined: Sun Nov 5th, 2017
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yes they are filled with dex/merc atf from the factory.
The fluid gets black from lack of maintenance or excess dirt entering the case through the breather tube (often broken or MIA)
Just because its black does not mean you have a bad case, but since its not bright red you might want to open it up and have a look see. It is not difficult to crack open the t case and have a look inside, they go back together quite easily
Or at least check that it functions correctly and plan to exchange the fluid a few times once its put in service.
You can often find the t case sitting on the ground at the junk yards, lucky for us anyone who is after the trans has to remove the t case and usually they do not want to spend an extra $75 for a case they don't need.
I found a 2008 case sitting on the ground right next to the F150, very low miles, very good condition on this one...I had all the tools to pull it, but it was my lucky day! They are a PITA to pull at the junk yard by yourself........can be done, but a PITA for sure
Have you ever “rebuilt†a 4406? I'm thinking (if need be) new chain, shift forks, pump and pickup tube maybe more parts.
I always see gm transfer cases (thanks to the crappy 4l60e) laying all over the ground. Just never 4406 till now!
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2002 xlt 4.0 5r55e 4x4 4.10 rear disc brake swap from sn95 **currently swapping in a 5.0***
2003 2.3 2wd 5 speed single cab dropped 9 inches looks like crap rides like crap but for some reason it’s cool to me
2004 gmc 2500hd 6.6 diesel LLY
1989 foxbody 347 stroker t5 trans