Originally Posted by lowflyn
4.10's are the best thing i've done to my aod 90. Not correcting the speedo, not so much.
I forget but aren't the drive gears actually part of the output shaft on the AODs or is it still 7 or 8 tooth plastic gear? I know on the manuals its plastic.
Crappy thing about the foxes is its a mechanical speedo so you can't use a speedcal and there is no gear to correct for anything higher than 3.27 with the 8 tooth drive gear and 3.73 with the 7 tooth.
2000 Mustang GT Steeda #0048 34k miles. 99 Cobra 4V swapped, FTBR IRS swapped, exhaust, tuned by James Gordon.
Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.