What did you do to your NNBS GMT900 Tahoe/Yukon Today?

[HiHoeSilver]

This is true, come help

Leave the porch light on, but don't wait up.

 

[Rocket Man]

Learned how to make a mess, christ

View attachment 229233

You're supposed to just crack the bottom open a bit , until it drains....

 

[Rocket Man]

Never understood why they don’t put drain plugs on the rear like they do on the front. Of course in the front, I’ve seen people drain the oil out the drain plug only to find that the fill plug is seized up and won’t come out. Then there left with an empty differential and no way to easily refill it.

Just rotate the truck upside down.

 

[wjburken]

Just rotate the truck upside down.

Damn-I knew there was a simple solution!

Talked to one guy and he bought some rubber stoppers and drilled a hole through one then inserted a tube into the hole and pumped the necessary amount into the differential, plus a little more then he pulled the stopper, plug hole with his thumb then quickly pulled his thumb and installed the plug. Very little fluid actually came out, surprisingly. Got him going until he had more time to get the fill plug out.

 

[Doubeleive]

You're supposed to just crack the bottom open a bit , until it drains....

ya I had a brain fart, now of all the stupid little things I do not have is a 1/2" allen wrench, everything I have is metric or to small, off to the store again.

***so the fill plug is not 1/2", lol I don't know what it is at this point but I got it off

and can't tell yet what capacity is supposed to be paperwork say's most take 2qt, internet says anywhere from 2.2 to 2.41, this adds more room, so going to try and eyeball it, the fill hole is deep cant see in there, guess it's getting filled till it comes out the hole

 

[avalonandl]

Dude- Ur having one of those frustrating days where it all goes sidewayz....Atf everywhere, wrong size bolts....

Crack a cold one when your done....

Good Luck

 

[gooffeyguy]

I think the fill plug takes a 3/8" rachet end/extension

2001 Yukon SLT
2012 Yukon Denali XL
2011 Yukon Denali RIP 5/20/18

 

[wjburken]

Crack a cold one when your done....

This might be one of those days where too much to drink isn’t enough.

 

[Rocket Man]

ya I had a brain fart, now of all the stupid little things I do not have is a 1/2" allen wrench, everything I have is metric or to small, off to the store again.

***so the fill plug is not 1/2", lol I don't know what it is at this point but I got it off

and can't tell yet what capacity is supposed to be paperwork say's most take 2qt, internet says anywhere from 2.2 to 2.41, this adds more room, so going to try and eyeball it, the fill hole is deep cant see in there, guess it's getting filled till it comes out the hole

The instructions for your TA Performance girdle say to fill until fluid comes out of the factory fill plug on the side of the housing, not the fill plug on the cover. Don’t overfill it.

 

[avalonandl]

This might be one of those days where too much to drink isn’t enough.

Oh yeah, been there done it....Woke up the next morning foggy brained and said "at least that job's done"....

 

[Doubeleive]

The instructions for your TA Performance girdle say to fill until fluid comes out of the factory fill plug on the side of the housing, not the fill plug on the cover. Don’t overfill it.

the factory fill plug was on the old cover plate, I put in 3qt I guess im going to call it good, factory capacity is supposedly 2.2~2.41qts and the cover is supposed to add 1/2 pint extra capacity so it has to be pretty dam close???

 

[avalonandl]

Well $hit.... I looked high and low for a decent 2500 that wasn't ratty and here one shows up on ebay....One month after I bought the Denali....

https://www.ebay.com/itm/2013-GMC-Y...271171?hash=item469a969783:g:DRcAAOSwUDldQp8h

 

[Rocket Man]

Well $hit.... I looked high and low for a decent 2500 that wasn't ratty and here one shows up on ebay....One month after I bought the Denali....

https://www.ebay.com/itm/2013-GMC-Y...271171?hash=item469a969783:g:DRcAAOSwUDldQp8h

Never fails!

 

[Doubeleive]

I think the fill plug takes a 3/8" rachet end/extension

2001 Yukon SLT
2012 Yukon Denali XL
2011 Yukon Denali RIP 5/20/18

the factory one does yes, but this ta performance girdle say's 1/2" npt in the manual, I didn't have anything fit, so i went hunting for a 1/2" allen-----NOPE, finally got it off and then took it to the store with me, would have been nice if they would have put in the manual that it takes a 3/8" allen

 

[gooffeyguy]

1/2" npt is the thread size (National Pipe Thread).

2001 Yukon SLT
2012 Yukon Denali XL
2011 Yukon Denali RIP 5/20/18

 

[Rocket Man]

1/2" npt is the thread size (National Pipe Thread).

2001 Yukon SLT
2012 Yukon Denali XL
2011 Yukon Denali RIP 5/20/18

Yes, and I have no idea why they put that info in the instructions but not the allen size. Like we’re going to go buy our own plug to put in there?

 

[Doubeleive]

1/2" npt is the thread size (National Pipe Thread).

2001 Yukon SLT
2012 Yukon Denali XL
2011 Yukon Denali RIP 5/20/18

Ya, I kinda figured it would take a 1/2" Allen, but o"well I got it done and have a nice new set of Craftsmen sae Allen wrenches now, lol
I was just missing the 3/8's, the hardest part was beating the panhard bar on it fought me all way, took 2 sets of rubber mallets because there is no room under the truck to swing so I did it from outside the driver's wheel well, I put one mallet on the bar then smacked it with the other mallet

 

[07Burb]

Ya, I kinda figured it would take a 1/2" Allen, but o"well I got it done and have a nice new set of Craftsmen sae Allen wrenches now, lol
I was just missing the 3/8's, the hardest part was beating the panhard bar on it fought me all way, took 2 sets of rubber mallets because there is no room under the truck to swing so I did it from outside the driver's wheel well, I put one mallet on the bar then smacked it with the other mallet

View attachment 229258

If you need a 1/2” Allen why not just a 1/2” drive ratchet wrench? would get the same results

 

[wjburken]

If you need a 1/2” Allen why not just a 1/2” drive ratchet wrench? would get the same results

I’m thinking that the hex drive won’t work with the square drive on a ratchet handle.

 

[Doubeleive]

If you need a 1/2” Allen why not just a 1/2” drive ratchet wrench? would get the same results

I tried everything I had at my disposal, I did finally get it off by wedging a flat head in with a smaller allen, I didn't want to put it back in like that and damage it though.