ZZP offers a Stage 2 Trans but they have been out for a while. I'm sure if you sent yours to them, they could have the work done to it.

I had considered having a local Trans guy that builds DSM and SRT trannys do up the one I grenaded but the work isn't cheap plus he's never done an F35 before so....

Your best bet is probably ZZP.

 

Well if you wanted to upgrade to a different final drive, there are places out there that can make them ( but if its just one itlll be pricey since its custom) Ive had the lsj trans for quite a few months and usually my car while in the top of third would blow, this lsj has not.