Max trailering package question

[Polo08816]

None of the above. It's an independent rear suspension so it uses a different differential than past generations or the pickups. That said, I note that the 5.3 uses a different GM part number for the rear diff than the 6.2 and 3.0 do.

2021 Suburban 1500 3.23 Locking Rear Carrier 1142987 | eBay

6.2L REAR DIFF 3.23 LOCKING G86/GU5. No Grade - A part that has not yet been graded. C Grade - The third level quality part. B Grade - The second level quality part. It is of average miles and normal condition for its age.

www.ebay.com

I understand that the 2021+ GM SUVs have an independent rear suspension, however, it still uses a rear differential and there must be a ring gear diameter measurement for that rear differential regardless of whether it is IRS or live axle.

 

[Fless]

I understand that the 2021+ GM SUVs have an independent rear suspension, however, it still uses a rear differential and there must be a ring gear diameter measurement for that rear differential regardless of whether it is IRS or live axle.

 

[Z71Burban]

Thanks for the input everyone I think im going to be patient (as hard as that is) and wait for my order to get picked up. My 2007 trailblazer that the Tahoe will be replacing is still going strong so no immediate need to jump on this one for us. Thanks again to everyone who replied.

It also makes the decision easier now that the dealer sent over the price quote which included a $3k “market adjustment” which wasn’t listed on their website. While it’s *only* 3k it just rubs me the wrong way

While I agree with the false advertising part of this, which would definitely make me mad, $3k is nothing. In the Chicagoland area, we are $8-12k over sticker…although the new gen is amazing, I opted out and bought a used 2017 fully loaded z71 the way I wanted it with low miles and less than half the price. I’ll get the current gen off lease in a few years or when this market tanks.

 

[Polo08816]

View attachment 388723

Interesting. Is the description accurate? Was the 2021+ GM full size SUVs available with a 3.42 drive ratio though?

 

[Fless]

No clue, but it's the only item like that on gmpartsgiant for a 2021 Tahoe.

 

[jforb]

The RPO list for 2022 Tahoe only shows 3.23 gears.

Model Information - Online Ordering Guide

 

[Geotrash]

I understand that the 2021+ GM SUVs have an independent rear suspension, however, it still uses a rear differential and there must be a ring gear diameter measurement for that rear differential regardless of whether it is IRS or live axle.

I'm sorry - I misunderstood both the likely reason for your request and your knowledge of these trucks. Like @Fless, I've come across several sources for the parts, but none provide a definitive diameter for the ring gear. Some, like this one, list both 9.5" and 9.75" in the description for the same part. When I drill into the parts though, I see three different part numbers available for the ring and pinion portion of the kit. One for 6.2L + 3.0L, a second for the 5.3L - both listed as being for mechanical limited slip, and a third for those that have the electronic limited slip. So my guess is that the size of the ring gear varies by engine, with the 9.75" being for the 6.2 and 3.0, and the 9.5" being for the 5.3 trucks.

 

[jforb]

A step up from the older 8.5 and 8.6" ring gears

 

[WalleyeMikeIII]

None of the above. It's an independent rear suspension so it uses a different differential than past generations or the pickups. That said, I note that the 5.3 uses a different GM part number for the rear diff than the 6.2 and 3.0 do.

2021 Suburban 1500 3.23 Locking Rear Carrier 1142987 | eBay

6.2L REAR DIFF 3.23 LOCKING G86/GU5. No Grade - A part that has not yet been graded. C Grade - The third level quality part. B Grade - The second level quality part. It is of average miles and normal condition for its age.

www.ebay.com

Actually, I think there are two P/N, one for the Mechanical Limited Slip Rear Diff, and one for the Electronic Limited Slip...independent of engine.

 

[StephenPT]

Short article - but this is a press-release from the manufacturer (AAM) of the rear axle for the T1 platform and it lists both the 9.5" and 9.76" ring gear sizes.

AAM Supplies New Independent Rear Drive Axles for GM Full Size SUVs

AAM is a premier, global leader in design, engineering, validation and manufacturing of driveline, metal forming, powertrain, and casting technologies. Stay up to date on our recent news.

www.aam.com

 

[Geotrash]

Actually, I think there are two P/N, one for the Mechanical Limited Slip Rear Diff, and one for the Electronic Limited Slip...independent of engine.

I see three here:

 

[DuraYuk]

I see three here:

View attachment 388745

5.3 = mechanical LSD smaller ring gear
6.2/duramax = mechanical LSD bigger ring gear
6.2/duramax = electronic LSD bigger ring gear

 

[Geotrash]

5.3 = mechanical LSD smaller ring gear
6.2/duramax = mechanical LSD bigger ring gear
6.2/duramax = electronic LSD bigger ring gear

Very helpful confirmation, thank you.

 

[WalleyeMikeIII]

5.3 = mechanical LSD smaller ring gear
6.2/duramax = mechanical LSD bigger ring gear
6.2/duramax = electronic LSD bigger ring gear

Interesting, when I went to one of the online parts retailers w/ a GM catalog, only 2 came up for the Tahoe and Yukon I looked at...one for electronic and one for Mechanical...but I trust your info more! Thanks!

Ex post facto info: went to parts.gmparts.com and only found 2 of the 3 P/N you show above as availble:
84881479 and 84766418. With Fitment notes as follows

For 84881479

THIS PART FITS VEHICLES WITH APPLICATIONS OUTLINED BELOW:​

• 3.23 Ratio(GU5), ELEC POSITRACTION LIMITED SLIP AXLE(G96)
• EXCEPT L/SLIP DIFF(G86)

For 84766418

THIS PART FITS VEHICLES WITH APPLICATIONS OUTLINED BELOW:​

• • 3.23 Ratio(GU5), L/SLIP DIFF(G86), 9.50 RING GEAR SAGINAW-AMERICAN AXLE

 

[sub08]

I would avoid GMPARTSGIANT - They sent me DORMAN 4WD actuator instead of OEM as I was expecting and I had to pay restocking fee and shipping for it. I will say away from them. I also read lots of people had bad experience with GMPARTSDIRECT.

 

[Geotrash]

I would avoid GMPARTSGIANT - They sent me DORMAN 4WD actuator instead of OEM as I was expecting and I had to pay restocking fee and shipping for it. I will say away from them. I also read lots of people had bad experience with GMPARTSDIRECT.

Yeah, we heard ya on the other thread.