TR6060 vs. T56 Magnum

[broken1234]

Anybody have any experience with RPM Transmissions in Indiana or Bowler in Illinois? I think I have it nailed down to one of these two...

[Ron in SoCal]

Rodney/Jeremy @ RPM are great guys and I know many that have had nothing but great transactions with them. They're racers too.

People love Mark Bowler and he's a big supporter of our hobby. My only experience with him was a messed up special order part on their side. By the time I discovered it, it was too late to return so I had to eat it. No 'sorry Ron', nothing.

Tough choice...

[broken1234]

well, I have decided that I want a beefed up tranny, and these two outfits are the final two. I like what I hear about the 6060, but here's my silly hang-up. If the 6060 is the way to go, then why don't I read about more 6060 usage on here?

[takid455]

most refer to it as T56 vs particular series of T56. I run T56's that are built up from stock and there no going back. The 6060 is a great unit. It weighs a little more than an earlier T56 as the internals are heavier (read stronger) Unless you opt for 9310 gear sets which unless you have deep 4 figure power numbers, its is doubtful that you will break it. The triple snycros may shifting smoother than the T56. Some T56's had triple CF snycros too like later Z06's and C5R vettes.

[71RS/SS396]

I have a Rockland Tranzilla with the ZR1 gearing and can say the trans shifts like no other T56 I have driven and so far has had no problems taking the beating of road racing it. My experience so far has been trying to find a clutch that's streetable that will live any length of time is a bigger problem.

[INTMD8]

As far as I know a 6060 and a Magnum are the same trans. (as in, I thought all Magnum's were 6060's and not T56's).

Now a 6060/Magnum over a T56? There are many internal upgrades the most important of which that pertains to you is stronger gear sets.

I've found it's easy to strip the teeth off of the input shaft and countershaft of the old T56 with over 800ft/lbs of torque.

RPM is an excellent choice for the 6060. They built the one in my twin turbo 07 Z06 and it always worked perfectly.

[Stovebolter]

Don't mean to highjack your thread but I thought my thoughts and questions might help someone make a decision.

Great thread. You've all helped me make the decision for a T56 Mag in the Corvette config. With 275/40s looks like the 2.66/.50 may be better suited for 4.10 and the 2.29/.67 better suited for 3.73 for the street. Both will place my cruise RPMs at 2200 at 55MPH in 5th and 2000-2200 at freeway speed which sounds great. But what about track? I have no track experience but hope to soon. The car will have 396 but I'm now leaning toward a built LS primarily for weight reduction. Any thoughts would be appreciated.

David