2g AWD AUTO final drive change????

[FastJetta]

Im really hoping that someone knows if its possible to change a 2G AWD AUTO trans final drive out for a taller one.

its a 91 galant vr4
built 2.4 around 750 whp currently
build 2g auto trans (welded center)
24.6" tire (currently)
revs to 8k

car will only do about 130 at redline in 3rd... obviously O/D wont hold the power so i need a way to get more mph.

besides putting a 29" tall tire to get the mph the only other option is to change gearing. Anyone heard of chaging out final drives?????

 

[crash89]

If Im not mistaken, I think for the autos its all in the converter, how tight or loose they are.. My buddy has gone through this will be the fourth converter in a season and a half trying to find the one that acts like he wants and gives him the mph hes shooting for. However this is in a 1g but I dont think it would make any difference. He was telling me about the differences between two of them and just changing from one converter to the other no change to tune he would gain x mph through the traps at an even lower rpm than his previous converter. Hope that kind of makes sense.

 

[donniekak]

Taller tires. This is why I swapped my auto out for a manual. I do lots of "spirited" highway driving, and not being able to do a pull past 120 was killing me.

 

[FastJetta]

If Im not mistaken, I think for the autos its all in the converter, how tight or loose they are.. My buddy has gone through this will be the fourth converter in a season and a half trying to find the one that acts like he wants and gives him the mph hes shooting for. However this is in a 1g but I dont think it would make any difference. He was telling me about the differences between two of them and just changing from one converter to the other no change to tune he would gain x mph through the traps at an even lower rpm than his previous converter. Hope that kind of makes sense.

yeah. im well aware of how that all works. but gearing is gearing irrelevent of the converter. all the calculation are with 0 vert slip. 8,000 rpm in 3rd with a 24.6 tire does 132 ish. I need like 160

Taller tires. This is why I swapped my auto out for a manual. I do lots of "spirited" highway driving, and not being able to do a pull past 120 was killing me.

yeah. i agree but manual is what was in my car... AUTO = way better for drag but i need more MPH.

 

[HighPSI TSi Guy]

26" tire and tighter converter

 

[FastJetta]

26" tire and tighter converter

Yeah but from gearing calcs it's gonna take a 28" tire just to do 160. That's a lot of tire. Haha.

 

[1qkfwd]

You just need a 26" tire. Pretty common for autos to run.