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Old 07-28-2014, 01:28 PM   #1
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GM is going to be putting the new 8 speed in trucks with the 6.2...

Looks like the 8L90, originally designed for the Corvette, is making it's way into all GM's 6.2 V8 pickups and SUVs. No word yet as to when the 5.3 will see it but I imagine it won't be more than a year (like they did with the 6 speed introduction).

8-Speed Automatic Confirmed For GM Full Size Trucks | GM Authority




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Old 07-28-2014, 01:49 PM   #2
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How many guaranteed recalls will you get if you buy one?
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Old 07-28-2014, 02:03 PM   #3
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How many guaranteed recalls will you get if you buy one?
My 2008 HD performed flawlessly for 115000k so far with no recalls and only rear brake pads changed at 90k, and having towed for 70k of that.
I will expect any new GMC 1500 will perform as well.


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Old 07-28-2014, 02:12 PM   #4
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GM's transmissions have, GENERALLY SPEAKING, been trouble free. I know they've had issues with some other vehicle elements. Also, every car maker ends up issuing recalls, it's the nature of the beast. I don't think I've owned a single car that hasn't had at least some minor little recall. Now, if GM we're announcing a new ignition switch...

I'm thinking hath at this'll be a great set up for people who want to tow some and drive solo some. Lower first gear for starting under load and higher top gear for cruising solo... plus all the speeds in the middle to find the sweet spot.


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Old 07-29-2014, 08:02 AM   #5
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Every car has a recall on it, but only the media is currently focusing on it's attention on GM's every single recall.
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Old 07-29-2014, 09:03 AM   #6
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The Escalade and Denali will be the first of the SUVs to get the new 8 Speeds and then the 5.3l as was noted earlier will have the new trans installed.
I wonder what the updated EPA ratings are going to be and if GM will revise the tow ratings.


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Old 07-29-2014, 09:05 AM   #7
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Quote:
Originally Posted by gmeikle View Post
My 2008 HD performed flawlessly for 115000k so far with no recalls and only rear brake pads changed at 90k, and having towed for 70k of that.
I will expect any new GMC 1500 will perform as well.


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I have been told that the HD truck (assuming you mean 2500) components were "Bullet Proof", and the half-tons were not so much. I have a 1500 with a 5.3 and a 3.73 rear, and steered away from the 6 speed/3.43 rear, even though my version had less towing capacity. My less than educated opinion at the time was "Less moving parts is a good thing"
Curious if the 8 speed will be in a HD truck
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Old 07-29-2014, 09:13 AM   #8
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GM used to make a 1500 (1/2 ton) HD. It had a 6l engine with the 4l85 transmission with 8 lugs at the wheels.
I don't know if this is what he meant?


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Old 07-29-2014, 01:15 PM   #9
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GM used to make a 1500 (1/2 ton) HD. It had a 6l engine with the 4l85 transmission with 8 lugs at the wheels.
I don't know if this is what he meant?


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Sorry, when I looked at my post I realized that I had stopped at HD when I meant HD 1500 ( 7200lb GVW)
The old HD was in fact a rebadged 8600lb GVW 3/4 in an attempt to get people who didn't want a 3/4 to buy into the 1/2 ton. It worked!
GM had 2 3/4 tons of 92, and 9600 lb GVW's necessitated by the heavier Duramax which if put in the 8600 would have yielded not much payload.


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Old 07-29-2014, 01:18 PM   #10
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Oh, and I forgot. The 8L90 will be in the 1500's with the 6.2L as per the GM release


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Old 07-29-2014, 03:50 PM   #11
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I'm very likely going to replace my 3/4 ton GMT 900 Suburban with a Yukon XL Denali when the 8 speed is available... especially if GM revises the towing numbers upwards. Apparently the new transmission is actually 8 pounds lighter than the outgoing 6L80 and will have a lower first gear so I imagine the ratings could go up.

For those with technical knowledge/interest, here's a detailed discussion of the new transmission: http://www.thetruthaboutcars.com/201...-transmission/


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Old 07-30-2014, 12:14 AM   #12
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Can't wait to see your new Denali with your 30ft AS Phbarnhart. Should be a nice combination.
Just a few more months till the end of the year!


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Old 07-30-2014, 12:54 AM   #13
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It'll be worth the wait. I'm also waiting for the onstar LTE wifi system. I keep looking around for details as to when they'll be available but I haven't found a concrete answer. I bet GM's still doing EPA ratings tests but that shouldn't take them too long. I'm guessing Q4?


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Old 10-19-2014, 10:51 AM   #14
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Well my Yukon has been built (it's at 3800 status for you GM order buffs) and I have the VIN. Maybe another 3-4 weeks should see it in my driveway.
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