?Gear? ratio for 2010 GMC Sierra crew cab
In looking at a previous post, on the amount of weight a TV can tow, there was talk of the 5.3 L engine and ?? Gear ratio. We have a 2010 GMS Sierra crew cab, 5.3 L, but where do I look to see this "...
Forum Discussion
The gear ratio has to do with how much power your truck will have in pulling heavy loads. With a higher number (4.10 vs 3.55 for instance)You give up a little gas mileage (when not towing) but increase it's ability to pull loads better when under stress such as up steep hills, in the mountains, getting it started from a stop at a light, etc. You also will get slightly better mileage when towing because the engine will not have to run at as high a RPM. Lower gear ratio's 3.08, 3.42 get better mileage and have less power than higher 3.55, 3.73, 4.10 ratios when not towing. Opposite is true when towing (usually).
Most people that tow heavier trailers want one of the top two (3.73 or 4.10) for a chevy. 3.04 is going to get nice mileage when not towing but your going to be using the debit card when you are. Gonna work it hard going up hills but it will pull that trailer, just going to be screaming (high RPM's) going up hills.
I have a crew cab 4x4 with the same engine and the 3.55 gears and it runs about 4500-5200 rpms up Jellico mountain pass in Tenn. It maintained speed but sounded like it was going to jump out from under the hood.
Most people that tow heavier trailers want one of the top two (3.73 or 4.10) for a chevy. 3.04 is going to get nice mileage when not towing but your going to be using the debit card when you are. Gonna work it hard going up hills but it will pull that trailer, just going to be screaming (high RPM's) going up hills.
I have a crew cab 4x4 with the same engine and the 3.55 gears and it runs about 4500-5200 rpms up Jellico mountain pass in Tenn. It maintained speed but sounded like it was going to jump out from under the hood.
