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trailrider

new plymouth, idaho

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Posted: 09/12/20 04:58pm Link  |  Quote  |  Print  |  Notify Moderator

I have over 7000 miles on my 2020 Silverado 3500 6.6 GAS. It is definitely an improvement over my 2016 Silverado 3500 6.0 GAS. It gets a little better fuel mileage and I definitely notice the increased torque on the hills hauling all the camping stuff. Six speeds is plenty for me moving 19000 pounds of stuff. Three speeds used to work for me also in the past. Imagine that!


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colliehauler

Mc Pherson KS USA

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Posted: 09/12/20 05:54pm Link  |  Quote  |  Print  |  Notify Moderator

I remember when the old power glide automatic only had 2 speeds.

Groover

Pulaski, TN

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Posted: 09/13/20 06:13am Link  |  Quote  |  Print  |  Notify Moderator

colliehauler wrote:

I remember when the old power glide automatic only had 2 speeds.


My family had a '63 and a '67 BelAir. The '63 had the 230 6 cylinder. It didn't have enough torque to use a third gear anyway so we really didn't notice the absence of a gear very much. The '67 had the 283 and always sounded like it needed to shift again but it was reliable and held up for quite a few miles. Then we got a '70 Impala with a 350 and a 3 speed transmission. Compared with the '67 it was bigger, more powerful, better to drive and gave better fuel economy. I inherited it in 1980 and drove it for 22 years. I only got rid of it then because I inherited a newer vehicle.

If you think that a 2 speed transmission was lacking my father used to talk about the '53 Buick with a single speed transmission but two torque converters.

Buick Dynaflow

colliehauler

Mc Pherson KS USA

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Posted: 09/13/20 08:34am Link  |  Quote  |  Print  |  Notify Moderator

Groover wrote:

colliehauler wrote:

I remember when the old power glide automatic only had 2 speeds.


My family had a '63 and a '67 BelAir. The '63 had the 230 6 cylinder. It didn't have enough torque to use a third gear anyway so we really didn't notice the absence of a gear very much. The '67 had the 283 and always sounded like it needed to shift again but it was reliable and held up for quite a few miles. Then we got a '70 Impala with a 350 and a 3 speed transmission. Compared with the '67 it was bigger, more powerful, better to drive and gave better fuel economy. I inherited it in 1980 and drove it for 22 years. I only got rid of it then because I inherited a newer vehicle.

If you think that a 2 speed transmission was lacking my father used to talk about the '53 Buick with a single speed transmission but two torque converters.

Buick Dynaflow
If I remember correctly it was capable of being push started even though it had a automatic. Dad use to have a old early 50's Roadmaster with the big straight eight engine. In the Greyhound Museum in Hibbing Minnesota Greyhound use to use the big straight eight motor in a few of it's in town transit buses.

The irony of a 6 speed not being sufficient considering where we come from. Still don't understand why GM is not using the 10 speed when it was a joint venture between Ford and GM?

noteven

Turtle Island

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Posted: 09/13/20 09:36am Link  |  Quote  |  Print  |  Notify Moderator

Is there something wrong with the Allison transmission in GM pickups?

Other than it doesn't have 4 overdrive speeds mostly useless for towing?

Retired JSO

North Georgia Mountains

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Posted: 09/13/20 10:37am Link  |  Quote  |  Print  |  Notify Moderator

BurbMan wrote:

The 10-speed was a joint dev effort between Ford and GM so not sure why Ford is in market with it sooner? The 8L90 8-speed has also been around so not sure why you can't get it in a truck?

I have the 10L80 ten speed in our 2019 Yukon with 6.2. While I don’t pull too much with it, it returns a consistent 23 MPG expressway driving at 75 mph.





Grit dog

Black Diamond, WA

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Posted: 09/13/20 11:58am Link  |  Quote  |  Print  |  Notify Moderator

noteven wrote:

Is there something wrong with the Allison transmission in GM pickups?

Other than it doesn't have 4 overdrive speeds mostly useless for towing?


Other than the gasser trucks haven’t had the Allison option since the 8.1L days, nothing is wrong with the Allison.


"Yes Sir, Oct 10 1888, Those poor school children froze to death in their tracks. They did not even find them until Spring. Especially hard hit were the ones who had to trek uphill to school both ways, with no shoes." -Bert A.

LITEPHIL

AZ

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Posted: 09/14/20 09:54pm Link  |  Quote  |  Print  |  Notify Moderator

Thank you all for the feedback. A little over a year ago I traded in my 06 chevy 3/4 ton with the 6.0 4spd for my 2019 Chevy 1500 5.3 8spd. Its great and tows my 6,000 lb trailer real nice but after you've had a couple 3/4 tons, you appreciate the heavier truck. So, in the back of my mind is that new 6.6, but after now driving with the 8 speed I kind of want 8 or 10 gears. We'll wait and see what chevy does.


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LanceRKeys

Amarillo, TX

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Posted: 09/14/20 10:19pm Link  |  Quote  |  Print  |  Notify Moderator

The 4 overdrive gears may not be useful for towing, but the first 6 gears sure are nice to have.

noteven

Turtle Island

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Posted: 09/15/20 07:37am Link  |  Quote  |  Print  |  Notify Moderator

Grit dog wrote:

noteven wrote:

Is there something wrong with the Allison transmission in GM pickups?

Other than it doesn't have 4 overdrive speeds mostly useless for towing?


Other than the gasser trucks haven’t had the Allison option since the 8.1L days, nothing is wrong with the Allison.


GM calls Allison: "We need more speeds... consumers want speeds!"

Allison: "Why?"

GM: "Because Ford has more speeds..."

Allison: "But Ford uses 140 cubic inch engines..."

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