Auto diff on manual car?

30psi · #1 22-01-2007, 15:44

Yes I used to have one

Sharas · #2 25-01-2007, 13:33

Hm... I checked the manual, and the s13 diff is 3,916, whereas the fj is 4,111 (from the topic about ca boxes). So in conclusion i should be geting shorter gear ratios... Not bad, i hope.

30psi · #3 25-01-2007, 13:59

How are you using the S13 crown wheel and pinion then?

Sharas · #4 25-01-2007, 14:26

Hm... I have the s13 gearbox (its not in the car yet), but diff the will be staying the same, from my s12, if everything fits ofcourse. (im not sure what exactly is crown wheel and pinion, but from what i found realy fast in google, these gears ar in the diff, so im hoping i wont need to change them)

30psi · #5 25-01-2007, 14:31

Yeah they're in the diff.

You need to compare the gearbox ratios not the diff ratios

Sharas · #6 25-01-2007, 14:39

Hm... Im a little confused now (the gearbox ratios are also a bit different, thou the 4 gear is the same), but dosent the final drive ration depend on the diff? (so if compared to an s13 i should have shorter gear ratios, since the final drive is different).
Or am i totaly wrong here now

30psi · #7 25-01-2007, 14:43

No if you want to compare it to an S13 its fine, but I though wanted to see what the effect of using an S13 gearbox would be in an S12?