2014 Sierra 1500 Axlle Ratios 3.42 vs 4.73

   / 2014 Sierra 1500 Axlle Ratios 3.42 vs 4.73 #31  
The best advice I can give is to just go drive every truck on the lot that catches your eye. I drove 4 different Silverado's in various configurations and that helped me make up my mind about what I wanted. You might find that you can live with something you thought you couldn't and find out stuff you absolutely must have. I have access to an F-450 anytime I want to use it, that's why I went with the 5.3 and 3.42's because it will do 99% of what I need it to. That 1% I need more truck, I'll just walk down to my friends shop and borrow his f-450 and if that won't pull it, maybe it doesn't need pulling.lol
 
   / 2014 Sierra 1500 Axlle Ratios 3.42 vs 4.73 #32  
Heck, I think it's great to stir the pot -- lots of good information here!

I was surprised how many trucks on the lot were equipped with the 3.08 gears. I saw several that had the exact equipment I wanted (including brake controller no less) but had a real wimpy tow rating due to the 3.08 gearing. Makes me wonder what sales manager ordered the 3.08 with brake controller combinations. Then there was my 3.42 with no brake controller. :confused:

The engine speed difference only takes place in the top (6th) gear. Having the lower gears ratio will just let the transmission up shift early in the first 5 gears.

The max RPM in each gear won't change if that triggers the shift, but you will still get higher RPMs per MPH in each gear (so the shift will occur at a lower speed). That RPM/MPH trend is what will eat some gas mileage over time. I remember years ago that the slope of the trend line when plotting MPH (vertical axis) versus RPM (horizontal axis) is key to MPG, though it's also dependent on the engine and its fuel rate per RPM (since MPG=MPH/GPH). Anyhow, it's not something we can generalize.
 
   / 2014 Sierra 1500 Axlle Ratios 3.42 vs 4.73
  • Thread Starter
#33  
.....maybe it doesn't need pulling.lol

With three high functioning ASD children under the age of 6, a wife in grad school, and a live in mom who is needing more and more assistance as time passes I am quickly learning that sometimes things really don't need doing. :laughing: I like having the lawn mowed, but at 3-4 acres sometimes there are more important things in life.... and sometimes that may just be sleep.

In regards to the original question about the gearing, if I can get the 4.73 with the other options I would like and without paying through the nose then I'll take it. If not its certainly not a deal breaker. GMC website MSRP for what I would ideally like ranges from 44,900 down to 41,430. Actually my low end is lower if I drop back to 2WD. To that end, here is what I am looking at:

Paint - (I'm flexible, and there are at least 3-4 colors I am willing to work with although the stealth metallic gray is my preference)
Crew Cab - (Required, 3 child seats - this is non-negotiable. And yes I realize a crew cab is not "ideal" for kid transport, but its a trade off b/c I'm not doing a suburban)
4WD - (Strongly preferred, but not required)
Standard Box - (Nice to have, but may likely have to go with short box due to regional availability)
5.3L V8 - (Required)
Max Tow Package with 4.73 - (Nice to have, but would trade off for other options)
Camper Mirrors - (Preferred, but not required)
Cloth Bucket Seats - (Required, the bench seats even with the 10-way adjustment just weren't comfortable for me)
Integrated Brake Controller - (Strongly preferred, but I do have P3 if need be)
SLE Value Package Bells and Whistles - (Would like, but not essential. Current rebate on this option fully offsets cost)

RollingFarms, I've sat in about 5 so far and test drove the configuration that was closest to the configuration that I wanted. Its kinda funny you mentioned how things that you might not perceive as being beneficial can be very useful and vice versa.

One of the problems we are constantly dealing with is charging electronic devices on trips. Ipods/Ipads have been a godsend for us both as learning tools for our children and as way to keep them entertained. I think I counted at least 4 USB ports and one 3 prong outlet in the model that I test drove. Two years ago I would have never looked at that and said to myself "that's a darned useful thing". Now, it almost makes me drool.

Similarly prior to driving my wife's Sienna I would have taken leather bench seats over cloth bucket seats. Neither the bench seats in the 1500 nor the seats in the Sienna are comfortable for me for long distances. The 1500's cloth bucket seats feel the best on my back.

Another thing I liked about the crew cab is the flip up rear seats. We have four dogs, one of whom is Puzzle, our middle child's service dog. Being able to quickly eliminate some of the seating is going to make it a lot more comfortable for Puzzle to travel in the truck.

In truth I am fortunate to be able to afford something like this, as well as being take care of 3 kids and send my wife to graduate school. One of the reason's for upgrading from the Heep is that I spend so much time on the road as is driving kids to therapy, school, as well running around taking care of everything that any vehicle I drive automatically becomes a mobile office. It doesn't help that we chose to live 30 minutes out of town either :p

Heck, I think it's great to stir the pot -- lots of good information here!
:thumbsup:

For grins and giggles let me see if I can visualize what you are saying... Assuming shift points are constant for the 3.42 and 4.73 you end up running through to the top end of each gear more quickly with the 4.73. Plotting the performance of the 4.73 on a graph (Y-axis MPH, X-axis RPM) should generally produce a curve that falls under that of the 3.42 indicating lower efficiency in terms of mpg's.

*Yes, I am generalizing and very badly given that I am thinking of nice smooth trend lines. I apologize if I goofed that up. My background is in biology and when you started talking graph's I started thinking population curves and I started playing graphs in my head.
 
   / 2014 Sierra 1500 Axlle Ratios 3.42 vs 4.73 #34  
With three high functioning ASD children under the age of 6, a wife in grad school, and a live in mom who is needing more and more assistance as time passes I am quickly learning that sometimes things really don't need doing. :laughing: I like having the lawn mowed, but at 3-4 acres sometimes there are more important things in life.... and sometimes that may just be sleep.

In regards to the original question about the gearing, if I can get the 4.73 with the other options I would like and without paying through the nose then I'll take it. If not its certainly not a deal breaker. GMC website MSRP for what I would ideally like ranges from 44,900 down to 41,430. Actually my low end is lower if I drop back to 2WD. To that end, here is what I am looking at:

Paint - (I'm flexible, and there are at least 3-4 colors I am willing to work with although the stealth metallic gray is my preference)
Crew Cab - (Required, 3 child seats - this is non-negotiable. And yes I realize a crew cab is not "ideal" for kid transport, but its a trade off b/c I'm not doing a suburban)
4WD - (Strongly preferred, but not required)
Standard Box - (Nice to have, but may likely have to go with short box due to regional availability)
5.3L V8 - (Required)
Max Tow Package with 4.73 - (Nice to have, but would trade off for other options)
Camper Mirrors - (Preferred, but not required)
Cloth Bucket Seats - (Required, the bench seats even with the 10-way adjustment just weren't comfortable for me)
Integrated Brake Controller - (Strongly preferred, but I do have P3 if need be)
SLE Value Package Bells and Whistles - (Would like, but not essential. Current rebate on this option fully offsets cost)

RollingFarms, I've sat in about 5 so far and test drove the configuration that was closest to the configuration that I wanted. Its kinda funny you mentioned how things that you might not perceive as being beneficial can be very useful and vice versa.

One of the problems we are constantly dealing with is charging electronic devices on trips. Ipods/Ipads have been a godsend for us both as learning tools for our children and as way to keep them entertained. I think I counted at least 4 USB ports and one 3 prong outlet in the model that I test drove. Two years ago I would have never looked at that and said to myself "that's a darned useful thing". Now, it almost makes me drool.

Similarly prior to driving my wife's Sienna I would have taken leather bench seats over cloth bucket seats. Neither the bench seats in the 1500 nor the seats in the Sienna are comfortable for me for long distances. The 1500's cloth bucket seats feel the best on my back.

Another thing I liked about the crew cab is the flip up rear seats. We have four dogs, one of whom is Puzzle, our middle child's service dog. Being able to quickly eliminate some of the seating is going to make it a lot more comfortable for Puzzle to travel in the truck.

In truth I am fortunate to be able to afford something like this, as well as being take care of 3 kids and send my wife to graduate school. One of the reason's for upgrading from the Heep is that I spend so much time on the road as is driving kids to therapy, school, as well running around taking care of everything that any vehicle I drive automatically becomes a mobile office. It doesn't help that we chose to live 30 minutes out of town either :p

:thumbsup:

For grins and giggles let me see if I can visualize what you are saying... Assuming shift points are constant for the 3.42 and 4.73 you end up running through to the top end of each gear more quickly with the 4.73. Plotting the performance of the 4.73 on a graph (Y-axis MPH, X-axis RPM) should generally produce a curve that falls under that of the 3.42 indicating lower efficiency in terms of mpg's.

*Yes, I am generalizing and very badly given that I am thinking of nice smooth trend lines. I apologize if I goofed that up. My background is in biology and when you started talking graph's I started thinking population curves and I started playing graphs in my head.

I think you mean 3.73, not 4.73.


You are over thinking this all. Just drive them all and buy what you like.

Chris
 
   / 2014 Sierra 1500 Axlle Ratios 3.42 vs 4.73
  • Thread Starter
#35  
I think you mean 3.73, not 4.73.
You are over thinking this all. Just drive them all and buy what you like.

Oops, yes I did, and naw not over thinking really. The commentary about graphs and curves was just late nite thinking after a drink and not being able to sleep. If I can get the max tow package great, if not then no big deal.
 
   / 2014 Sierra 1500 Axlle Ratios 3.42 vs 4.73 #36  
Oops, yes I did, and naw not over thinking really. The commentary about graphs and curves was just late nite thinking after a drink and not being able to sleep. If I can get the max tow package great, if not then no big deal.

Why not just order it how you need it. I ordered my last two trucks and you get exactly what you want and nothing you don't. Also your not buying something guys like me have test driven.
 
   / 2014 Sierra 1500 Axlle Ratios 3.42 vs 4.73 #37  
Here's a notional graph of how the ratios would compare in a single gear, just for discussion purposes. In reality you have a separate line for each gear in the transmission, with slope increasing as the gear increases (ratio decreases). A good science project for kids is to ride along and call out pairs of (RPM,MPH) points and write down, then make plots (you only need two points for each gear since it's linear).

gearing.png

I ended up with stealth gray. Did not like the color at all in the Chevy models, but it looked great on GMC.

Definitely go for crew cab -- the double cab is a real waste, as the back seat is not that usable for all the extra claptrap. I assume the double cab is only in the lineup for cost and/or length limitations for some buyers. A rear facing baby seat will only fit in the crew, but front facing seats fit in both models. I currently have a rear facing seat in the center position in my Sierra, secured with the middle belt (LATCH anchors are only on the outboard seats). It's actually a very good vehicle for kids from what I can see; on par with our Acura MDX SUV if not a little roomier and nicer.

I'd say standard box is a must. The short box is again there for customers with length limitations (say in a garage; I think my garage is long enough, but I'll be parking outdoors anyhow, so no issue). The extra bed length is a big deal for utility; heck, I really wanted long bed, but so far standard is working out OK. Short bed would have been a cramp. The maneuverability difference between short and standard bed with crew cab is minor.

SLE value package adds some nice stuff. Main thing I wanted was rear view camera and the power seats. I could not get comfortable with the manual seats. Both bench and bucket seats seemed OK to me. Both are much softer than I am used to with foreign cars. I have lumbar cranked to the max on the Sierra, and wish it also had an adjustment for thigh support!
 
   / 2014 Sierra 1500 Axlle Ratios 3.42 vs 4.73 #38  
Here's a notional graph of how the ratios would compare in a single gear, just for discussion purposes. In reality you have a separate line for each gear in the transmission, with slope increasing as the gear increases (ratio decreases). A good science project for kids is to ride along and call out pairs of (RPM,MPH) points and write down, then make plots (you only need two points for each gear since it's linear).

<img

Only linear on gears in which the torque convert can and is locked. On my ford, torque converter will Lock 3rd through 6th gear. As I said earlier, gas mileage won't suffer until you are locked in the highest gear because the transmission will just up shift earlier and keep similar ratios at lower speeds.
 
   / 2014 Sierra 1500 Axlle Ratios 3.42 vs 4.73 #39  
Why not just order it how you need it. I ordered my last two trucks and you get exactly what you want and nothing you don't. Also your not buying something guys like me have test driven.

The deals are on the 2014 models and they are into 2015 production now. You are limited to what you can find on the dealers lots. I just purchased the 8 cylinder with the 3.42 gears and have averaged 17.7 mpg on the first two tanks of fuel. It's a standard cab WT2 with full size bed and I really like it so far. The Bluetooth works very well and the cutout step in the rear bumper is real handy.

Good luck in your search!
 
   / 2014 Sierra 1500 Axlle Ratios 3.42 vs 4.73
  • Thread Starter
#40  
Why not just order it how you need it. I ordered my last two trucks and you get exactly what you want and nothing you don't. Also your not buying something guys like me have test driven.

That may be the direction we are headed in. I have spec sheets sent out to a couple of different dealers via email. I am going to see what happens with that first. And as a fallback go to ordering. I'm planning on updating if I hear anything interesting today.
 

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