Hi all,

Trying to figure out what the gear ratio is on my 98 Sidekick (1.6, 4speed auto, 4wd, 4 door).

The pumpkin did not have a gear ratio tag on it like the old Danas.  It did have some writing on the bottom (...TH or something) but I didn't bother to clean it off as it did not look like #s... 

Is there a line setting ticket on the vehicle somewhere?

Thanks for any help in advance..

Dan

I think the 4 speed 4 door autos were 5.125, like the manual
trans 2 doors, I know there is a listing on Zukiworld that has
all the combos of trucks and trannys and gear ratios

Wild

Found it here: http://bbs.zuwharrie.com/content/topic,15579.0.html

Thanks!

I pulled a front axle from a 92 4-door with a 16v and a 5 speed yesterday, and we did the old "hold one cv shaft, turn the pinion, and count the rev's to get the gear ratio". Just over two turns of the pinion was one rev on the cv shaft. I'm confused, it should've taken just over 5 turns to equal a 5.125 r/p ratio right?

Hi all,

Trying to figure out what the gear ratio is on my 98 Sidekick (1.6, 4speed auto, 4wd, 4 door).

Yours has 5.125 axle gears stock.

I pulled a front axle from a 92 4-door with a 16v and a 5 speed yesterday, and we did the old "hold one cv shaft, turn the pinion, and count the rev's to get the gear ratio". Just over two turns of the pinion was one rev on the cv shaft. I'm confused, it should've taken just over 5 turns to equal a 5.125 r/p ratio right?

Yours will have 5.125 axle gears stock.

Hold one CV shaft, turn the other one exactly 2 revolutions, count the number of turns that the pinion flange turns.  That number will be the ratio (so it should turn just a touch over 5 turns, for every 2 turns of the CV shaft).

Sky just beat me to it - the reason for the "two turns of the CV shaft" is this ...

The final drive ratio is the number of turns of the pinion/number of turns of the axle - but - with an open differential, if you hold one axle and rotate the other - the "differential action" causes the free axle to rotate twice as fast.

If you had a locked differential, you could turn the CV shaft and count the pinion shaft and see the exact ratio, but with an open diff you would need to rotate both CV shafts exactly the same amount to see that happen.

Awesome, that makes sense, since the pinion turned just about 2.5 revs times 2 = 5.125. I think I will install the new axle, jack up one side of the truck, mark the tires, and if they turn the same when I spin the driveshaft, it's time for more wheelin'!

Thanks guys!