Difference Between An Auto And Manual Diff

[joexiong]

Hi,

Can anyone please tell me the difference with diff ratios between a r32 gtst auto diff and the manual diff?

I've just recently did a manual conversion with a rb25det gearbox on my r32. I also have a manual diff laying around so i was wondering which one is better to stick to?

Thanks

[Guilt-Toy]

Hi,

Can anyone please tell me the difference with diff ratios between a r32 gtst auto diff and the manual diff?

I've just recently did a manual conversion with a rb25det gearbox on my r32. I also have a manual diff laying around so i was wondering which one is better to stick to?

Thanks

Usually the auto is a shorter ratio. Put the manual in for better fuel economy and longer gears - or if you like it zippy and short keep the auto dif in.

[Pal]

i got a conversion and left the auto diff in, getting around 450 to 500 a tank. thats around 11l/100k's. from what i remember the auto diff is around a 4.33 and a manual is 4.11.

[predator]

auto is 4.3.

now I've converted mine to manual, it pulls quite nicely using the shorter ratios, so i'd recomend leaving it. Mine sits at 3000rpm at 110km/hr, which is ok by me.

[dan cohen]

Does anyone know how much effect is there on the speedo readings when you change diff ratios?