M/T true 33s - 4.56 vs 4.88

I don't commute and even so I don't usually go over 70. I prefer to cruise

 

Sounds like 4.88 or 5.29 is your choice then. I'm a 4.88 fan on 32-33's.

 

The more I read the sexier 5.29s are looking

 

OP, maybe step up to supercharger? This way you are forcing the air in.

 

Not a huge difference really so you just have to lean one way or the other.

 

4.88 and a SC on the list.

 

5.29 purchased

 

Did you look at what your rpm's will be at 65 with your manual truck and 5.29's? The handwritten numbers on the first page are incorrect for your truck. Your rpms will likely be 500 higher in 6th gear than those listed. So your engine will be beyond it's sweet cruising spot when you are rolling along at 70-75, burning down fuel. Just wondering.

 

I live in colorado. I am on 33s. I have 4.56 gears sitting around waiting to be put in, along with some other stuff. Theoretically I will be closer to stock rpms which is what I am aiming for.

 

Mt ratios like I posted above for the AT. Showing 60 mph and 70.

For 33” tall tires

 

This is how it's presented from SDHQ:

• 3.91 & Stock Tire, ~1500 RPM @ 60 MPH, ~1750 RPM @ 70 MPH (NOT ENOUGH RPM!)
• 4.88 & Stock Tire, ~1950RPM @ 60 MPH, ~2200 RPM @ 70 MPH
• 33” 4.88, ~1750 RPM @ 60 MPH, ~2000 RPM @ 70 MPH)
• 33” 5.29, ~1900 RPM @ 60 MPH, ~2250 RPM @ 70 MPH)
• *Manual trans RPM figures will be higher.

Which is funny because I have to drive in 5th 90% of the time on the highway anyway so it won't make that much of a difference I'll just be in 6th instead of 5th

 

Not to mention the inevitable 35's

 

Right so the MT at 70 mph the truck will be at 2700 rpm and at 75 closer to 3000 rpm, which is high for doing any kind of trips with this truck.

Ok, so maybe I was mistaken, you have an AT? because your numbers are not for an MT then.

 

Do the Tunes available address gearing and or Tire size?

 

No it's an MT, I just bumped up those figures that SDHQ provided. At the end of the day I don't really mind the higher RPMs. I'm a stones throw away from the foothills and I want that low end

 

What tunes?

 

makes sense.

 

OV tunes, etc.

And no. It explicitly states that in their post.

Edit: I believe tunes can be slightly altered to accommodate tire size and gearing. I don’t think it’s a one size fits all.

 

Ahh I ty for the clarification.

 

It is for the manual transmissions. I did mine a month ago and the tune pack for MTs don't specify tire size just fuel grade etc; The AT tune pack does specify tire size in order to fix gear hunting