Ford’s new Shelby GT500 is just about perfect – it looks great, goes like hell
and it makes all of the right sounds. Unfortunately, it has one major flaw that
affects both performance and detracts from the driving experience. Ford selected
gear ratios for the Tremec 6060 transmission to optimize 0-60mph times. The
problem is that these ratios cause the engine to bog down on the 1-2 shift and
also reduce shift quality.
Rockland Standard Gear, home of the famous Tranzilla® high-performance
six-speeds has the ideal fix – RSG will transform your balky 6060 into a
Tranzilla Jr., capable of withstanding up to 750hp with ratios that keep you
buried in the powerband! RSG has two gearsets available
(2.66/1.78/1.30/1:1/.74/.50 or 2.97/2.07/1.42/1:1/.80/.062). Both of these
ratios are a huge improvement over the O.E. gear spacing of
2.98/1.78/1.30/1:1/.80/.63.
Additional modifications include a 30-spline, 9310-alloy mainshaft and REM
(mirror) finished gears and shafts. The synchros are upgraded to carbon fiber
triple cone (1-2) and carbon fiber double cone for the 3-4 and 5-6 gears. These
Tranzilla Jr.s come with billet synchro keys, billet shift interlock and steel
3-4 shift forks, painstakingly custom matched and fitted and performance shimmed
for maximum durability.
For those who’ve boosted their Shelby to the 1,000hp-plus level, RSG offers
the original Tranzilla rated to 1200hp. They feature the same upgrades as
Tranzilla Jr. plus a full 9310 super close-ratio (2.29/1.60/1.21/1:1/.85/.75)
gearset ideal for road racing. Race type dog-ring synchros are also available
providing clutchless shifting for quicker lap times.
To give your Tremec 6060 the RSG makeover you must send your trans to RSG for
the transformation. They promise a one-week turn-around time from receipt of
your transmission. For more information please visit us on the web at: www.rsgear.com.