Tr 6060
Burning Brakes
Joined: Jul 2013
Posts: 823
Likes: 7
From: Rosewood Heights IL
05 to 07 had a T56. The TR6060 had wider gears, thinner synchronizer assemblies, tighter clearances, and a host of other changes I can't think of off the top of my head.
The 6060 had a rated torque capacity of 700WTQ IIRC. It is an improvement by a pretty large margin, but the T56 isn't junk.
The 6060 had a rated torque capacity of 700WTQ IIRC. It is an improvement by a pretty large margin, but the T56 isn't junk.
Tech Contributor
Joined: Apr 2007
Posts: 10,924
Likes: 78
From: Forney Texas
15% wider gears made of stronger material (4615 alloy), they removed the slider keys that caused catastrophic failures over a 10 dollar part. 
With the key-less design, the engagement is much smoother. The synchronizer teeth are much smaller, but there are many more of them. If you miss a gear, it's easier to chew up the teeth, but more difficult to miss a gear to cause the problem in the first place.
Under hard acceleration, the fluid is pushed to the back of the case, starving the gears of cooling and lubrication. The TR6060's have pumps that pump to a cooler and the return is to the counter shaft, which is the critical part in need. In 2010, they moved the pickup further back so the pump wouldn't cavitate so easily and the return was moved to a more optimum place on the counter shaft.
The T56 is not junk, especially with the 30 spline shaft in it, but the TR6060 is far superior IMO.
I began with a stock 6060 from an 08Z in my C5 and beat the crap out of it for 2 years with over 1kRWHP and never had an issue with it.
If you're making 600RWHP, do you need a 6060? No, but I think you'll appreciate the smoother shifting and believe that it'll last through more abuse.
With the key-less design, the engagement is much smoother. The synchronizer teeth are much smaller, but there are many more of them. If you miss a gear, it's easier to chew up the teeth, but more difficult to miss a gear to cause the problem in the first place. Under hard acceleration, the fluid is pushed to the back of the case, starving the gears of cooling and lubrication. The TR6060's have pumps that pump to a cooler and the return is to the counter shaft, which is the critical part in need. In 2010, they moved the pickup further back so the pump wouldn't cavitate so easily and the return was moved to a more optimum place on the counter shaft.
The T56 is not junk, especially with the 30 spline shaft in it, but the TR6060 is far superior IMO.
I began with a stock 6060 from an 08Z in my C5 and beat the crap out of it for 2 years with over 1kRWHP and never had an issue with it.
If you're making 600RWHP, do you need a 6060? No, but I think you'll appreciate the smoother shifting and believe that it'll last through more abuse.
Supporting Vendor
Joined: Apr 2011
Posts: 3,332
Likes: 194
From: Frederick Maryland
St. Jude Donor '08-'09-'10-'11-'12, '14-'15-'16-'17-'18
15% wider gears made of stronger material (4615 alloy), they removed the slider keys that caused catastrophic failures over a 10 dollar part. With the key-less design, the engagement is much smoother. The synchronizer teeth are much smaller, but there are many more of them. If you miss a gear, it's easier to chew up the teeth, but more difficult to miss a gear to cause the problem in the first place.
Under hard acceleration, the fluid is pushed to the back of the case, starving the gears of cooling and lubrication. The TR6060's have pumps that pump to a cooler and the return is to the counter shaft, which is the critical part in need. In 2010, they moved the pickup further back so the pump wouldn't cavitate so easily and the return was moved to a more optimum place on the counter shaft.
The T56 is not junk, especially with the 30 spline shaft in it, but the TR6060 is far superior IMO.
I began with a stock 6060 from an 08Z in my C5 and beat the crap out of it for 2 years with over 1kRWHP and never had an issue with it.
If you're making 600RWHP, do you need a 6060? No, but I think you'll appreciate the smoother shifting and believe that it'll last through more abuse.
With the key-less design, the engagement is much smoother. The synchronizer teeth are much smaller, but there are many more of them. If you miss a gear, it's easier to chew up the teeth, but more difficult to miss a gear to cause the problem in the first place. Under hard acceleration, the fluid is pushed to the back of the case, starving the gears of cooling and lubrication. The TR6060's have pumps that pump to a cooler and the return is to the counter shaft, which is the critical part in need. In 2010, they moved the pickup further back so the pump wouldn't cavitate so easily and the return was moved to a more optimum place on the counter shaft.
The T56 is not junk, especially with the 30 spline shaft in it, but the TR6060 is far superior IMO.
I began with a stock 6060 from an 08Z in my C5 and beat the crap out of it for 2 years with over 1kRWHP and never had an issue with it.
If you're making 600RWHP, do you need a 6060? No, but I think you'll appreciate the smoother shifting and believe that it'll last through more abuse.
I agree.
__________________
Supporting Vendor
Joined: Apr 2011
Posts: 3,332
Likes: 194
From: Frederick Maryland
St. Jude Donor '08-'09-'10-'11-'12, '14-'15-'16-'17-'18
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski