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

[lowh07]

I'm going to need to replace my 3.42s with 4.10s shortly after the 4l80 is in. Is it recommended to replace the carrier as well as ring/pinion?

If anyone has recommended part numbers that would be awesome.

 

[swathdiver]

It does fly by.
My oldest turns 16 next month and can get his license.

Our oldest has given a grandchild to spoil already and our youngest just turned 15 and another is in college now, talking about joining the Navy!

I'm going to need to replace my 3.42s with 4.10s shortly after the 4l80 is in. Is it recommended to replace the carrier as well as ring/pinion?

If anyone has recommended part numbers that would be awesome.

Carrier is the same unless you want a new one. You can look up ring and pinion PNs from ACDelco's website or AAMs https://s3.amazonaws.com/aamsiteassets/resources/file-20180329163830.pdf

Ohh, how come you NEED to do it? Performance?

 

[lowh07]

Carrier is the same unless you want a new one. You can look up ring and pinion PNs from ACDelco's website or AAMs https://s3.amazonaws.com/aamsiteassets/resources/file-20180329163830.pdf

Thanks! I'm wondering how strong the stock carriers are... I'd hate to swap the gears out then have to do it over again

 

[swathdiver]

Thanks! I'm wondering how strong the stock carriers are... I'd hate to swap the gears out then have to do it over again

Well, the 8.6 is not as strong as a 9.5 and the 8.6 Eaton Carriers are stronger than stock so you may want to consider the Trutrac.

https://www.eaton.com/Eaton/Product...rket/Differentials/detroit-truetrac/index.htm

 

[lowh07]

Well, the 8.6 is not as strong as a 9.5 and the 8.6 Eaton Carriers are stronger than stock so you may want to consider the Trutrac.

https://www.eaton.com/Eaton/Product...rket/Differentials/detroit-truetrac/index.htm

That's probably the way to go for peace of mind

 

[lowh07]

Ohh, how come you NEED to do it? Performance?

Correct... I suppose it's more of a want....... lol

 

[R3cord303]

Yeah, now mine drive me around! Seems like yesterday when they were in strollers.

Hey Allen, @R3cord303 , check out the weight of those airstreams! Built to last means heavy.

Trailer weight doesn't bother me too much for this purpose as its living quarters for vacation. Thing I really like about Airstreams is that the there's none of that ****** terrible membrane crap on the roof like there is on normal recreational camp trailers and toy haulers because that stuff sucks.

 

[swathdiver]

Thanks! I'm wondering how strong the stock carriers are... I'd hate to swap the gears out then have to do it over again

Well, we put over 500 horses and 600+ foot pounds of torque through them 30 years ago in a 3500 pound car. Never broke one. But GM chose to equip any truck with a 6.2 that was RWD or 4x4 with the 9.5 semi-floater over the 8.6 which they used for the AWD 6.2s. That being said, lots of guys have gone trutrac while some others went 9.5.

In the K2s, GM went with the 9.6 or 9.75 Salisbury, very minor difference in size, these are both 12-bolt rears.

 

[swathdiver]

Trailer weight doesn't bother me too much for this purpose as its living quarters for vacation. Thing I really like about Airstreams is that the there's none of that ****** terrible membrane crap on the roof like there is on normal recreational camp trailers and toy haulers because that stuff sucks.

Definitely higher quality and more enduring. My truck would be hard pressed to tow a 19 foot Airstream because of the weight last time I checked.

 

[lowh07]

Well, we put over 500 horses and 600+ foot pounds of torque through them 30 years ago in a 3500 pound car. Never broke one. But GM chose to equip any truck with a 6.2 that was RWD or 4x4 with the 9.5 semi-floater over the 8.6 which they used for the AWD 6.2s. That being said, lots of guys have gone trutrac while some others went 9.5.

In the K2s, GM went with the 9.6 or 9.75 Salisbury, very minor difference in size, these are both 12-bolt rears.

I just found a guy on youtube with a 2004 Tahoe with an LSA blower, and he destroyed the stock 8.6 after a few weeks of adding the blower... went with the trutrac after that

 

[R3cord303]

Definitely higher quality and more enduring. My truck would be hard pressed to tow a 19 foot Airstream because of the weight last time I checked.

whats the weights? They only have the feets listed

 

[HiHoeSilver]

I just found a guy on youtube with a 2004 Tahoe with an LSA blower, and he destroyed the stock 8.6 after a few weeks of adding the blower... went with the trutrac after that

Trutrac FTW. Just dont drive on any gravel with nice cars around! Them things can throw a stone like nobody's bidness.

 

[wjburken]

whats the weights? They only have the feets listed

5000#+ for 19’ wet and gassed.

https://www.airstream.com/travel-trailers/caravel/specifications/?floorplans=19cb

 

[swathdiver]

whats the weights? They only have the feets listed

The website is different than the last time I looked but found them under "SPECs". A 26RB Flying Cloud weighs about 6,000 pounds empty with a GVWR of 7,600. For my truck and situation, I'd like to keep the TTs loaded weight at 6,600 pounds max. give or take a hundred.

 

[R3cord303]

The website is different than the last time I looked but found them under "SPECs". A 26RB Flying Cloud weighs about 6,000 pounds empty with a GVWR of 7,600. For my truck and situation, I'd like to keep the TTs loaded weight at 6,600 pounds max. give or take a hundred.

That aint bad. Sticker on mine says max legal trailer weight is 10,000 with a load distributing hitch with a tounge weight of 1,000. Just gotta load it correctly, watch sway, be careful with wind, standard stuff. Gonna be a while before we buy one and honestly a 3/4 ton burb would be perfect

 

[gooffeyguy]

I think that is what the hitch is rated at, not what the vehicle can tow.

My sticker on the hitch says the same thing, but the owners manual says the actual tow ratings

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

 

[iamdub]

I just found a guy on youtube with a 2004 Tahoe with an LSA blower, and he destroyed the stock 8.6 after a few weeks of adding the blower... went with the trutrac after that

It could've been beat on prior or maybe he did a lot of hard launches afterward- who knows? I supercharged my '02 S10 4.3 and blew up the Gov-Lock very soon after at only 32K miles because I beat on it since day one. On the flip, there are people running 13s or faster on the stock 10-bolt in their F-bodies. It's almost a crapshoot. From a high performance perspective, I'm not a fan of how the stock LSD operates. It's more of a limited spin than a limited slip, and it limits that spin with an abrupt engagement. Introduce more power, more grip and more leverage from shorter gears and it becomes a mechanical fuse.

 

[R3cord303]

It could've been beat on prior or maybe he did a lot of hard launches afterward- who knows? I supercharged my '02 S10 4.3 and blew up the Gov-Lock very soon after at only 32K miles because I beat on it since day one. On the flip, there are people running 13s or faster on the stock 10-bolt in their F-bodies. It's almost a crapshoot. From a high performance perspective, I'm not a fan of how the stock LSD operates. It's more of a limited spin than a limited slip, and it limits that spin with an abrupt engagement. Introduce more power, more grip and more leverage from shorter gears and it becomes a mechanical fuse.

I too blew the piss out of my gov lock. About a week after putting bigger tires on it, I went down to the local mexico and launched the balls off it, and it caught the slip and made a loud crunchy grinding noise until it shifted into second. What did you use for a supercharger?

I'm very pleased with how the LSD works in the tahoe. Guess that's just the advantage of the fly weight style used in the 7.6 in my s10 vs the clutch style used in the 8.6. That and I've not added too much power.

 

[Rocket Man]

I too blew the piss out of my gov lock. About a week after putting bigger tires on it, I went down to the local mexico and launched the balls off it, and it caught the slip and made a loud crunchy grinding noise until it shifted into second. What did you use for a supercharger?

I'm very pleased with how the LSD works in the tahoe. Guess that's just the advantage of the fly weight style used in the 7.6 in my s10 vs the clutch style used in the 8.6. That and I've not added too much power.

Biggest problem is the bearing caps which deflect under extreme stress and cause the bearing to go. A girdle is a must-have imo for high hp applications. I have a TA Performance girdle on mine. It has load bolts that keep the bearing caps from deflecting.

 

[iamdub]

What did you use for a supercharger?

Wynjammer. It was sort of experimental on my part as well as Al Martin's. lol

I still have it and was considering modding the bracket to fit the LS accessory bracket and throwing it on the Tahoe. I'd have to study the compressor map and the 5.3's airflow dynamics, but the rough idea is that I could get 6-7 psi out of it with the pulley intended for 10 psi on the 4.3. The FlexFuel injectors would easily support it so it'd be a cheap little kick. I almost wanna bolt it up just to hear it.