[Joe]

I've asked what diff ratio is in the auto SQ420 before and have been told they are 4.8 however i have also read on here that the they are 5.12
To find out for sure can i count the amount of times the tail shaft turns to one full rotation of the wheel? and if so how many turns of the tail shaft will they be for each ratio?

This is for an auto 2.0L not an auto 1.6L

Cheers Joe

[Fatzook]

They won't be 5.12's.

I just read that the SQ420 SWB 5sp runs 4.875's. I doubt the auto will run the same.....

[Fatzook]

Well if this link can be trusted..... http://www.4wdonline.com/Suzuki/Vitara.html

They may infact be 5.12's

[Joe]

Fatzook wrote:

Well if this link can be trusted..... http://www.4wdonline.com/Suzuki/Vitara.html

They may infact be 5.12's

Well that's a bit shit do you know how many turns of the tail shaft to one rotation of a wheel i need to count just to check to make sure?

[Fatzook]

I thought it was one rotation of the wheel = 5.125 rotations of the tailshaft.

Jack the car up. Chalk the inside of the wheel at 6 o'clock, chalk the flange dust cap and 3rd wherever you want, aslong as they are lined up with each other before you start.

See how many revolutions the tailshaft does to one revolution of the wheel.

EDIT: So if it has 5.12's, you should get a hair over 5 revolutions. 4.8's would be a touch under. 4.6's would be a smidge more than 4 and a half turns etc etc.

[Joe]

Thanks for your help Mr Fat

One full revolution of the wheel


And a bit under five turns of the tail shaft


So i would say they are 4.8's now i can get some 5.12's rebuilt with the front in a steel housing

[Chop]

Joe wrote:

So i would say they are 4.8's now i can get some 5.12's rebuilt with the front in a steel housing

But you said that if it had 5.12's that would be shit

Joe wrote:

Fatzook wrote:

Well if this link can be trusted..... http://www.4wdonline.com/Suzuki/Vitara.html

They may infact be 5.12's

Well that's a bit shit do you know how many turns of the tail shaft to one rotation of a wheel i need to count just to check to make sure?

[Joe]

Chop wrote:

Joe wrote:

So i would say they are 4.8's now i can get some 5.12's rebuilt with the front in a steel housing

But you said that if it had 5.12's that would be shit

Joe wrote:

Fatzook wrote:

Well if this link can be trusted..... http://www.4wdonline.com/Suzuki/Vitara.html

They may infact be 5.12's

Well that's a bit shit do you know how many turns of the tail shaft to one rotation of a wheel i need to count just to check to make sure?

Nah i want to put bigger tyres on and change the gearing to suit if they were already 5.12's i would be stuck in the same boat as my last vitara with no options for better gearing for bigger tyres

[Fatzook]

5.125's are only 6-8% lower than 4.825's, so this won't correct for much more than a 225/75 16.

[zooky08]

sorry to hijack this thread, what ratio is it when the wheel rotates one revolution to two revolutions of the drive shaft

[Joe]

Fatzook wrote:

5.125's are only 6-8% lower than 4.825's, so this won't correct for much more than a 225/75 16.

Will only be going for a 225/75r16/245/70r16 but would like to try some 245/75r16's down the track

[Fatzook]

zooky08 wrote:

sorry to hijack this thread, what ratio is it when the wheel rotates one revolution to two revolutions of the drive shaft

1:2. You must be doing something wrong.

[zooky08]

Fatzook wrote:

zooky08 wrote:

sorry to hijack this thread, what ratio is it when the wheel rotates one revolution to two revolutions of the drive shaft

1:2. You must be doing something wrong.

thats what i thought, we did it five times just to make sure, turn the wheel one for revolution and the drive shaft spun two full revolutions, this is ment to be a maruti diff center

[want33s]

Fatzook wrote:

1:2. You must be doing something wrong.

/\ /\ X2 (except it's 2:1)
You are doing it wrong.
Turn the tailshaft.
Sometimes the spider gears will halve the ratio if only one wheel is jacked up.

[zooky08]

Both wheels where of the ground, but only one was turning, so thing your right about the side gear part.
I'll have another go today.

[watermouse]

quick tech info update

LWB (5door) SQ420 manual, 1998, has 4.875:1 diffs. (4.825:1?)

Just did the test above. I found it easier to rotate the tailshaft by hand and kept an eye that both wheels turned at the same rate. On the "5th" turn of the tailshaft it went .88 of a turn (to bring the mark on both tyres to the ground) as accurately as I could measure with my dodgy tape measure.

[Bruce]

Also 2000gv v6 auto came with 4.875.1.