Michael Johnson
Technical Editor
April 5, 2017

When it comes to Mustangs, the cars keep getting better and better each year. That is both a good and bad thing since we buy what we think is the greatest Mustang ever, and then Ford goes and makes the next iteration even better. It’s even worse if you’re in love with an earlier body style, and you see all this technology being applied to the latest Mustang, and you’re missing out on the fun. Variable valve timing, six-speed automatics, IRS suspension, 8,250-rpm redline, and the like, has us chomping at the bit to apply that technology to our own Mustang.

Steve Shrader at Shrader Performance faced the same issue with his 1999 Mustang GT, which he named Brightmare thanks to its Chrome Yellow hue and 9-second elapsed times. Like the rest of us, he witnessed plenty of 2011-2014 Mustang GTs going mid-9s with a simple power adder and tune with the stock 6R80 automatic transmission. We’ve seen many 8-second cars with the 6R80 in place, as well. Steve knew there was something to this transmission enabling 8- and 9-second performance, and he wanted it for Brightmare.

It took him three years of R&D, but Steve has released a new 6R80 swap guide and transmission crossmember for 1999-2004 Mustangs. The guide is a 30-page tutorial on how to install a 6R80 transmission in your New Edge Mustang. “It includes a comprehensive list of parts required for the swap, detailed wiring schematics and crossover charts to the 1999-2004 harness, and details about how to control the 6R80 and Two-Valve or Four-Valve engine using a Coyote PCM from 2011-2014,” Steve says.

Knowledge costs money, and when it makes your life that much easier, you spend the money to do it right the first time. Shrader Performance’s 6R80 Transmission Swap Guide puts it all on a silver platter for you when you’re ready to swap in the latest Mustang’s six-speed automatic. The guide spells out everything you need, and how to perform the swap, using a 2011-2014 GT Copperhead PCM, a 6R80 transmission, and Shrader’s transmission crossmember. The swap guide by itself is currently on sale for $250.

That’s right, Steve gives you the template for adding a 2011-2014 Mustang GT Copperhead PCM to control your Two- or Four-Valve 1999-2004 GT or Cobra, and mate it to a 6R80 transmission. It applies to both 4.6 and 5.4 modular engines, and even though Steve’s guide is focused in on Two-Valve New Edge cars like his, you can modify it to work with a Three-Valve and Four-Valve combination, as well.

Steve’s Brightmare features a 323ci Two-Valve, boasting both a Vortech supercharger and nitrous, making over 900-rwhp, and running mid-9s in the quarter-mile at over 145 mph. And just like in his own New Edge, the 6R80 swap guide will show you how to keep your gauge functionality, and also continue to enjoy PATS security system operation, as well.

Shrader Performance’s aluminum transmission crossmember not only enables you to install a 6R80 in your New Edge, you can also use it for an MT-82 six-speed manual, when doing a Coyote swap. The crossmember is currently on sale for $329.95. Yes, there is a discount when you buy both the swap guide and crossmember.

Along with the guide, Shrader also offers a 6R80 crossmember designed for swapping in a 6R80, or a Getrag MT-82 six-speed manual into your 1999-2004 Mustang. Shrader says the 6R80 and MT-82 use the same factory support, and this crossmember will enable to the installation of either transmission. With the proliferation of Coyote swaps, this crossmember makes it that much easier. The crossmember accepts both the factory 2011-2014 transmission support isolator, and aftermarket isolators, as well.

To get your hands on the 6R80 swap guide and crossmember, you can call Shrader Performance at 704.879.7268, or hit them up on the interwebs at www.shraderperformance.com.