 Common manual transmission modifications include cryo treating, shot peening, transmission case welding, aftermarket limited slip differential, aftermarket axles, and upgraded clutches.Common automatic transmission modifications include built valve bodies, aftermarket torque converters, automatic transmission fluid (ATF) coolers, additional ATF filters, and aftermarket TCUs.Higher rated transmission swaps from front-wheel drive VQ or QR25DE powered cars such as the 2002–2006 Nissan Sentra SE-R Spec-V have also been performed.