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Gave her a fresh oil change with full synthetic and an K&N HP-2011. Ready to go until the next time 
What did you do to your NNBS GMT900 Tahoe/Yukon Today?
- Thread starter phattyford
- Start date
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Gave her a fresh oil change with full synthetic and an K&N HP-2011. Ready to go until the next time
Check your diff fluid, mine just took a dump.
Tonyrodz
Resident Resident
I wish "they" were all as observant.
Just Fishing
Can't fix stupid
I was looking at this and thinking wth happened?!
But I just looked at mine, same cut.
weird!!
Maybe that prevents warpage when they weld this thing together?
Sparksalot
Elite Member
Thermal expansion joint. There are a few on it. There was an explanation in the box.I was looking at this and thinking wth happened?!
View attachment 363481
But I just looked at mine, same cut.
weird!!
Maybe that prevents warpage when they weld this thing together?
gooffeyguy
Tom
Who reads instructions, duh
Just Fishing
Can't fix stupid
Yeah, i apparently didn't read anything.
I noticed a warranty card and a sticker!
I'm still holding onto the foam packaging, but the box was made into future laying under the hoe sheets.
Sparksalot
Elite Member
RTFM just confuses people. Donchaknow.
Sparksalot
Elite Member
i figured what it was initially. There are times my degree in train driving comes in handy.Yeah, i apparently didn't read anything.
I noticed a warranty card and a sticker!
I'm still holding onto the foam packaging, but the box was made into future laying under the hoe sheets.
I have that cool sticker too. Not sure where to put it yet.
pwtr02ss
Full Access Member
Noticed a whirling sound on the Avalanche. Sounds like maybe the AC compressor? Its around 1200-1500 RPM and then either the engine noise drowns it out or it goes away. I'll need to do some more investigating when it warms up.
Last edited:
- Joined
- Jan 3, 2011
- Posts
- 50,911
- Reaction score
- 19,230
She's only got 64,000 miles on her. Her diff fluid should be so fresh you could drink it
- Joined
- Jan 3, 2011
- Posts
- 50,911
- Reaction score
- 19,230
turbos?
pwtr02ss
Full Access Member
Sadly, no
Just Fishing
Can't fix stupid
Got my new transmission pump cover yesterday.
Located my old transgo shiftkit that I installed when i first got the hoe.
That kit has some pump upgrades!
Fully dissembled the pump valving and cleaned first.
Didn't notice that the pump stator seals on the updated version that i have, well it has Orings behind the seals to prevent leakage and shift issues!
(side note: this pump version also addresses a 2-3 shift flare that units built before December 2008 may have, my transmission should be one of those)
Used carb cleaner spray to really break up the packing gunk, then rinsed with brake cleaner.
then i saw those Orings were already starting to swell from the carb cleaner.
Luckly the pump kit came with an extra set.
Installed my new transgo boost valve kit.
It also happens to address an issue where there can be "run-away pressure" due to worn parts.
That prevents the classic cracked clutch drum that will leave you with a no drive, no reverse, and if minor, delayed reverse and shift flare/delay condition.
That issue drum is right behind the pump
So, i might yank it to give it a good go over while everything is apart...
But if this thing is on its side, then i might have issues getting the spines to align with the clutches for reinstall.
for sure I'm going through it if i end up just pulling the transmission...
Now I'm just waiting on the bell/pump housing so i can get some measurements and get a pump rotor kit and slide ordered.
I'll get some pictures and toss them up on my build thread once i have the pump housing in hand.
Located my old transgo shiftkit that I installed when i first got the hoe.
That kit has some pump upgrades!
Fully dissembled the pump valving and cleaned first.
Didn't notice that the pump stator seals on the updated version that i have, well it has Orings behind the seals to prevent leakage and shift issues!
(side note: this pump version also addresses a 2-3 shift flare that units built before December 2008 may have, my transmission should be one of those)
Used carb cleaner spray to really break up the packing gunk, then rinsed with brake cleaner.
then i saw those Orings were already starting to swell from the carb cleaner.
Luckly the pump kit came with an extra set.
Installed my new transgo boost valve kit.
It also happens to address an issue where there can be "run-away pressure" due to worn parts.
That prevents the classic cracked clutch drum that will leave you with a no drive, no reverse, and if minor, delayed reverse and shift flare/delay condition.
That issue drum is right behind the pump
So, i might yank it to give it a good go over while everything is apart...
But if this thing is on its side, then i might have issues getting the spines to align with the clutches for reinstall.
for sure I'm going through it if i end up just pulling the transmission...
Now I'm just waiting on the bell/pump housing so i can get some measurements and get a pump rotor kit and slide ordered.
I'll get some pictures and toss them up on my build thread once i have the pump housing in hand.
While replacing my water pump and radiator last week I just happened to spin the tensioner while I had it in my hand…..glad I did. Sounded so dry and rough I bet it would have failed in a few thousand miles. Easy to check!!
pwtr02ss
Full Access Member
Everything on the front of the engine is new OEM, Gm stuff. Everything was replaced 6k miles ago while I had the engine out. It could be a tensioner but it sounds like it's on the passenger side
Just Fishing
Can't fix stupid
Dicked around with the tahoe for a moment today.
Been wanting to try disconnecting the TV screen in the back to see if it helps my rear speaker issue.
Disconnected, and my rear speakers are back!!
damn thing has been rattling anyways.
on the to-do list once i have the other major issues sorted.
With the rear speakers working, it's waaay down below the "replace seat cushion foam" task.
Been wanting to try disconnecting the TV screen in the back to see if it helps my rear speaker issue.
Disconnected, and my rear speakers are back!!
damn thing has been rattling anyways.
on the to-do list once i have the other major issues sorted.
With the rear speakers working, it's waaay down below the "replace seat cushion foam" task.
gooffeyguy
Tom
Thinking that it's on maybe?
I do know that if the rear seat passengers plug in headphones it disables rear speakers or if the rear entertainment screen is on and I'm still listening to music up front the music only come out the front speakers
