December 01, 2021, 01:00:00 PM

Diff ratios

Started by Pete, August 24, 2018, 06:46:06 PM

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Pete

Hey everyone, so my yonng lads vitara was an auto converted to manual.
As far as I know the diffs were not touched. Is there a different ratio between auto and manual? I thought there was but I could be wrong. If so, I should be changing the auto diffs to manual ones, correct?
Cheers, Pete

zuk94

The 5:12:1 ratio is one of the most common manual transmission ratios and does great with 27-29" tires. Increasing tire diameter to 31-33" will decrease the mechanical advantage to the point where cruising a highway or climbing a steep grade will be difficult. Automatics were common with 4.62:1 ratios and even upgrading to a 5.12:1 will make a significant difference in performance.

Pete

Cheers mate. I have some manual diffs available to swipe the gears from.
Can I tell visually what gears are in the diffs now?

mrw82

If they are 4.6 I'd be interested in the front one when you're finished with it.
PRADO  a toyota it is, a suzuki it aint.

SNOTBOX   ready for play

TEAM NFI = If you can't make it, break it.

Pete

Sure thing.
It's getting head replaced atm so diffs are next on the list. I'll let you know how it goes.
Still need to know how to tell the difference between the gears before I start pulling stuff apart

zuk94

To Determine Gear Ratio. Count the number of teeth on the pinion gear and count the number of teeth on the ring gear. Divide the ring gear teeth number by the number of teeth on the pinion. The result is your gear ratio.
For the ones on your  on your car mark a point on the tailshaft and on your wheel . Rotate the wheel and count how many times your tailshaft spins.

Pete

Cheers mate. Just got it back so will take a look soon as I can