Gear Ratios Help
- Thread starter tommy222220_0
- Start date
Help Support Nissan Navara Forum:
I have gone over your calcs and can't see much wrong with them, but I am making some assumptions:
1) a tyre that is "30.6" inches refers to the diameter of the tyre's outside dimension, ie from tread to tread (measured horizontally, as there'll be some compression on the vertical axis).
2) Your values for gear ratios are correct - my manual is for an STX D40 and all of its ratios are different. My manual lists 4 different variations on all of the ratios for the exact same vehicle too, so this is somewhere I'd be looking at to verify things.
What I *can* say is that a ratio of 1 seems uniform across the models in 4th, so I'd actually be looking at your final drive ratio for the error.
1) a tyre that is "30.6" inches refers to the diameter of the tyre's outside dimension, ie from tread to tread (measured horizontally, as there'll be some compression on the vertical axis).
2) Your values for gear ratios are correct - my manual is for an STX D40 and all of its ratios are different. My manual lists 4 different variations on all of the ratios for the exact same vehicle too, so this is somewhere I'd be looking at to verify things.
What I *can* say is that a ratio of 1 seems uniform across the models in 4th, so I'd actually be looking at your final drive ratio for the error.
tommy222220_0
Member
Thanks, for your advice.
To make it work, the final drive ratio need to be 5.1:1
Or the tyre size needs to be about 26"
(265/70R16 STD)Its like the transfer is 1.2:1 or something
