Colin Wiltshire
05-07-2013, 10:55 PM
Just wondering if there is any difference in ratio between the standard vr4 ayc diff and the s-ayc?
I have found that low speed in 5th, the car struggles a little more that it did before, however I did have the turbos swapped, again for standard, non smokey 1's.
Either could make that difference I guess.
This I did find, but I'm not sure/understand if there is a difference.
Nope, they actually have the same ratio, both (overall) are given 4.111 in manuals and 3.684 in Autos. The transfer case *speeds up* the driveshaft going to the rear with a 0.301886792 ratio, acheived with a 16/53 gear combination in the transfer case, and guess what the rear diff has? Yep, another 16/53 gear (3.3125) to return it back to the same speed.
Interestingly from EVO5 onwards to EVO9 the rear had a 13/43 ratio, to create 3.307692308. I wonder if that somehow affects the handling of the car and why people notice the car handling quite differently with the SAYC.
I have found that low speed in 5th, the car struggles a little more that it did before, however I did have the turbos swapped, again for standard, non smokey 1's.
Either could make that difference I guess.
This I did find, but I'm not sure/understand if there is a difference.
Nope, they actually have the same ratio, both (overall) are given 4.111 in manuals and 3.684 in Autos. The transfer case *speeds up* the driveshaft going to the rear with a 0.301886792 ratio, acheived with a 16/53 gear combination in the transfer case, and guess what the rear diff has? Yep, another 16/53 gear (3.3125) to return it back to the same speed.
Interestingly from EVO5 onwards to EVO9 the rear had a 13/43 ratio, to create 3.307692308. I wonder if that somehow affects the handling of the car and why people notice the car handling quite differently with the SAYC.