Yukon Hybrid
#41
Re: Yukon Hybrid
This is veering off topic but...
Oh, I see; My mistake. I was basing this on your many posts like the following one from the "driving in hills" thread where you've said repeatedly that you never exceed 2400 RPM on I-70 and still go 55. This is basically impossible in the FEH.
For those unfamiliar: These climbs are four to six lanes with a mix of cars going 60-80 MPH and trucks crawling up at 10-15, then cruising down at 30-50. Truckers use their engine brakes to prevent loss of control and slow to less than 25 on the steepest downhill sections. Many cars on this road are rentals driven by vacationers unfamiliar with high altitude driving. Others are commuters, and then there are all the athletes/skiers/mountaineers etc going to/from homes or the mountain recreation areas. It's a crazy mix at any time. It has numerous runaway truck ramps and is often the scen of nasty accidents.
As John accurately states, it's imperative for safety to keep moving with the flow of traffic.
For those unfamiliar: These climbs are four to six lanes with a mix of cars going 60-80 MPH and trucks crawling up at 10-15, then cruising down at 30-50. Truckers use their engine brakes to prevent loss of control and slow to less than 25 on the steepest downhill sections. Many cars on this road are rentals driven by vacationers unfamiliar with high altitude driving. Others are commuters, and then there are all the athletes/skiers/mountaineers etc going to/from homes or the mountain recreation areas. It's a crazy mix at any time. It has numerous runaway truck ramps and is often the scen of nasty accidents.
As John accurately states, it's imperative for safety to keep moving with the flow of traffic.
#42
Re: Yukon Hybrid
Toyota planned to have their hybrid Tundra out by now, but it isn't,and they no longer "boast" about when it will be arriving.From this it is reasonable to assume that they are having problems scaling their system up.
Obviously,Toyota doesn't "tell" anyone what the "problem" is, but I have read-somewhere online,I guess- that they are having problems making the system durable enough for heavy towing/carrying. It is one thing to scale it up to move 5500 lbs of vehicle/people/payload/tongue wt(I'm guessing that is the max a HH can weigh fully loaded), but to scale it up to be able to tow 10,000 lbs from a dead stop uphill is a very different thing.You would think you could just make the gears 3x as strong etc, but apparently it is a lot harder than that.
One of GM's advantages is that it has lots of experience with "heavish" light duty 1/2 ton pickups,and with true heavy duty pickups.
I've been pleasantly surprised with the build quality/durability/ride.drivetrain of the 2 used GM vehicles I owned(2001 Prizm),and 1998 Suburban.Despite being 197000 miles old, it gets an honest 20mpg at 60mph(sea level). I could see a Yukon/Tahoe with better aerodynamics,and the smaller 5.3 getting 23-25mpg hy at 60 mph.
It wouldn't be a bad idea to drop the national speed limit to 68mph or so.It was done(55mph) in the late 70's,and it reminded us all that we were in a struggle to save fuel.We need a bit more "pain" to get the country behind conservation.I don't want that pain to be $5 /gal gasoline.
Charlie
Obviously,Toyota doesn't "tell" anyone what the "problem" is, but I have read-somewhere online,I guess- that they are having problems making the system durable enough for heavy towing/carrying. It is one thing to scale it up to move 5500 lbs of vehicle/people/payload/tongue wt(I'm guessing that is the max a HH can weigh fully loaded), but to scale it up to be able to tow 10,000 lbs from a dead stop uphill is a very different thing.You would think you could just make the gears 3x as strong etc, but apparently it is a lot harder than that.
One of GM's advantages is that it has lots of experience with "heavish" light duty 1/2 ton pickups,and with true heavy duty pickups.
I've been pleasantly surprised with the build quality/durability/ride.drivetrain of the 2 used GM vehicles I owned(2001 Prizm),and 1998 Suburban.Despite being 197000 miles old, it gets an honest 20mpg at 60mph(sea level). I could see a Yukon/Tahoe with better aerodynamics,and the smaller 5.3 getting 23-25mpg hy at 60 mph.
It wouldn't be a bad idea to drop the national speed limit to 68mph or so.It was done(55mph) in the late 70's,and it reminded us all that we were in a struggle to save fuel.We need a bit more "pain" to get the country behind conservation.I don't want that pain to be $5 /gal gasoline.
Charlie
#43
Re: Yukon Hybrid
I wasn't clear. I was refering to the Ford guy and his eCVT. The Fords are rated at 1000lbs towing, while the Highlander is rated at 3500lbs. The Ford and Toyota use esentially the same system (when comparing 2WD versions...)
The main thing I could see about Toyota not scaling it to something like the Tundra would be a price/benefit issue.
The nice thing about the Ford/Toyota HSD system is that there are no bands, clutches or changing of gears. Seems like a good towing setup to me.
It's my understanding that most towing failures are transmission failures. And I'd guess that most of those failures are bands or clutches failing. Not an actual gear breaking.
Anyone with transmission shop or rebuilding experience?
#44
Re: Yukon Hybrid
This is veering off topic but...
Oh, I see; My mistake. I was basing this on your many posts like the following one from the "driving in hills" thread where you've said repeatedly that you never exceed 2400 RPM on I-70 and still go 55. This is basically impossible in the FEH.
As John accurately states, it's imperative for safety to keep moving with the flow of traffic.
Oh, I see; My mistake. I was basing this on your many posts like the following one from the "driving in hills" thread where you've said repeatedly that you never exceed 2400 RPM on I-70 and still go 55. This is basically impossible in the FEH.
As John accurately states, it's imperative for safety to keep moving with the flow of traffic.
What you posted adds up to me for those conditions. I may use different techniques based on conditions, but that's me.
If you see me post anything different from one thread to another, please hit me with the same information about John as you did. If anyone except persons with multiple ID's lie about things, I will inform. So far, there is is only one person doing that, that I know. Guess who?
GaryG
#45
Re: Yukon Hybrid
Everything I said was accurate, and things in Gary's posting are inaccurate. You can climb the rockies at 2400 RPM and 55 miles per hour if your car is a 2wd and does not have a lot of extra weight or other "drag".
I said "anyone can" I never said everyone must, or should.
Indications are, Gary has been "hitting the sauce" again... and not Tobasco!
I said "anyone can" I never said everyone must, or should.
Indications are, Gary has been "hitting the sauce" again... and not Tobasco!
#46
Re: Yukon Hybrid
Everything I said was accurate, and things in Gary's posting are inaccurate. You can climb the rockies at 2400 RPM and 55 miles per hour if your car is a 2wd and does not have a lot of extra weight or other "drag".
I said "anyone can" I never said everyone must, or should.
Indications are, Gary has been "hitting the sauce" again... and not Tobasco!
I said "anyone can" I never said everyone must, or should.
Indications are, Gary has been "hitting the sauce" again... and not Tobasco!
The fact is, I climb steep bridges that may be like the climbs everyone faces with the ICE in your area. As far as the sauce, please give me the chance to take your FEH in front of this group!
GaryG
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bharani
GM Hybrid Trucks, Cadillac Escalade Hybrid, Chevrolet Tahoe Hybrid & GMC Yukon Hybrid
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12-28-2019 12:43 PM