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Re: Gm 6.6L Gas Engine
[Re: auburn17]
#4165954
07/18/24 12:33 PM
07/18/24 12:33 PM
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Joined: Oct 2008
Posts: 8,210
In front of my lathe
gundoc
14 point
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14 point
Joined: Oct 2008
Posts: 8,210
In front of my lathe
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From what I've read, that 10L1000 transmission is an Allison in name only.
it's a GM design with input from Allison. The 6 speed is/was a true Allison and a much better transmission
As with every other GM Transmission that are having probles with it too
There are two types of gun enthusiasts ... Those who have been F#CKED by PTG and those who will be!
~ unknown
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Re: Gm 6.6L Gas Engine
[Re: auburn17]
#4166026
07/18/24 03:49 PM
07/18/24 03:49 PM
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Joined: Nov 2002
Posts: 6,923
Moulton,AL
Snuffy
14 point
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14 point
Joined: Nov 2002
Posts: 6,923
Moulton,AL
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I’m not too worried about fuel economy, I don’t pay for fuel. Coming out of a diesel I just didn’t want to be disappointed in power and towing. Compare the numbers. 6.6 gas is 401 hp and 464 ft pounds of torque 13 mph. 6.6 Duramax 470 hp and 970 pounds of torque 20 mpg. No comparison. Your going to be disappointed!
If you always do what you've always done you always get what you've always got
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Re: Gm 6.6L Gas Engine
[Re: hoggin]
#4166029
07/18/24 03:56 PM
07/18/24 03:56 PM
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Joined: Oct 2008
Posts: 8,210
In front of my lathe
gundoc
14 point
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14 point
Joined: Oct 2008
Posts: 8,210
In front of my lathe
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I read a lot about GM having problems with transmissions but we own a bunch of them and I really don’t see any having issues until 180,000 miles or so. Is that really an issue? People used to junk the whole car at 100k!! I personally know of one that gave up just after being serviced (fluid drained and filter changed) at 76K. Owner barely made it out of the dealership lot from being serviced before it started shifting crazy. Something went wrong in the valve body Having said that, Ram and their 68RFE is no better and the Ford with the CP4 time bomb of a fuel fump, they all have their issues. Also have a buddy with a F150 with the turbo V 6. Only has 27K on it. Went to crank it one day and it wouldn't start. Some sensor in his transmission went bad and prevented the truck from even starting. Not sure which transmission he has though. GM's 6 and 8 speed transmissions and Fords 10 speed transmissons also have welll documented problems They are machines and are gonna break at some point. I've about come to the conclusuon one in no better than another
There are two types of gun enthusiasts ... Those who have been F#CKED by PTG and those who will be!
~ unknown
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Re: Gm 6.6L Gas Engine
[Re: auburn17]
#4166342
07/18/24 10:15 PM
07/18/24 10:15 PM
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Joined: Oct 2010
Posts: 1,783
Oak Grove, AL
Butchman205
8 point
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8 point
Joined: Oct 2010
Posts: 1,783
Oak Grove, AL
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I have a 2021 6.6 gas burner with the 6 speed transmission, in a 2500 HD LTZ Z71. It’s a pulling machine.
I’ve got 122k miles on it, with only powertrain problem being left front brake caliper has had to be replaced twice.
The 400+ horsepower is plenty. It’s very torque plentiful, and handles a load very well.
If you want to give it a go with a load or a trailer full, keep your tires at 70psi, and just let it pull.
Personally, I think it is a VERY GOOD compromise between good power/but not too much that would destroy the rest of the powertrain (like the tuned up bazillion foot pound of torque diesels).
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Re: Gm 6.6L Gas Engine
[Re: auburn17]
#4166417
07/19/24 07:10 AM
07/19/24 07:10 AM
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Joined: Dec 2004
Posts: 5,427
Hartselle
longshot
12 point
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12 point
Joined: Dec 2004
Posts: 5,427
Hartselle
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Sorry I though you were talking about the good old 400 SBC.... I got one of those going to the machine shop today..
I Pledge Allegiance to the flag of the United States of America. and to the republic for which it stands, one nation under God, indivisible, with liberty and justice for all.
Some men are born brothers, Others earn it... JD
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