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Unread 01-06-2013, 12:39 PM
broken1234 broken1234 is offline
Join Date: Feb 2012
Posts: 64
Default TR6060 vs. T56 Magnum

Buying a tranny for a street driven 2nd gen Camaro (LS with twin turbos)with around 750 rwhp.... don't plan much track (drag and autocross) usage, but it will get a little. I assumed I would end up with a T56 of some variety but a couple of suppliers are trying to sell me a TR6060. Everybody that I talk to has a different opinion about why I need one of the other. I'm leaning toward a beefed up T56 Magnum just because it seems that most folks go that way with no issues... what's the collective wisdom of the group here??
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Unread 01-06-2013, 12:56 PM
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wiedemab wiedemab is offline
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Join Date: Oct 2005
Location: Batesville, IN
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The T56 Magnum is essential a particular configuration of the TR6060 -- soooooooo......
Brandon Wiedeman
'72 Suburban
'67 Chevy II -

I have about 3 lifetimes worth of projects planned out in my head!
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Unread 01-06-2013, 01:11 PM
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Sieg Sieg is offline
Join Date: Dec 2010
Location: Pacific Northwet
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6060 is rated to 600 ft. lbs. vs. the T56 Mag's 700 ft. lbs. Being that the 6060 is OEM spec they have most likely cut some cost corners to meet OEM contract demands.

Upside to OEM is parts availability may be better. The T56 Mag parts availability is suspect from my experience. The vent line I needed was in Mexico and no where else.

Gear ratio's could be a deciding factor. I didn't see ratio specs on Tremec's website. I'm sold on close ratio compact spacing vs. wide ratio low 1st and tall 6th. The wide ratio doesn't make sense, if you're running a tall rear gear that needs a low 1st, you don't need a tall 6th. If you're running a low rear gear that needs a tall 6th then you have a worthless 1st gear.
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Unread 01-06-2013, 11:03 PM
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T_Raven T_Raven is offline
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Join Date: Feb 2006
Location: Idaho Falls, Id
Posts: 296

The Magnum is the aftermarket version of the TR6060. As for gearing, as far as I know the only factory TR6060 with the closer gearing is in the non Z51 Vettes. Camaros, CTS-Vs, etc all have the wider gearing and are not set up for a normal drive shaft. I don't know about Ford and Dodge applications though.

You can essentially take a Vette TR6060, swap the input shaft, mid plate, main shaft, and tail housing to Magnum parts and have a Magnum.

If someone is trying to sell you a TR6060 and claiming it's not a Magnum what application is it for? With the bell housing and input shaft on a Camaro or CTS-V TR6060, they will bolt up to any LS engine but you have to use the LS3 style clutch. With a Magnum you can use any t56 bell housing and clutch.
67, 68, 69 & 72 Firebirds, 79 TA, 89 GTA, 01 WS6, 68 Camaro, 68 Mustang, 54 GMC awd turbo, 67 GMC
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Unread 01-16-2013, 04:04 PM
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gnx7 gnx7 is offline
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Join Date: Aug 2012
Location: Bay Area, CA
Posts: 460

The Magnum is a waaaay better transmission than the older '93-02 style Fbody T56. Shifts better due to triple synchros, wider faces on the gears made of stronger metal, all the bearings are bigger for higher load capacity, 31 spline output shaft, provision to tap an oil cooler/sprayer, the case weighs more for increased rigidity.

I sold a fully built old style T56 in my RX-7 swap to put in a new Magnum. Such a better transmission especially the shifting. Plus the .80 5th gear ratio keeps you more in the your powerband.
Project: 1969 Chevelle, alum 5.3, GTS76 turbo, Chiseled Perf A/W intercooler, Holley Dominator EFI, Davis TC, JRi coilovers, 14" brakes, T56 Magnum. CTS-V Recaro seats!
Coffey Fabrication Nashville, TN doing the fabwork! 800rwhp+/25mpg+/9's@150mph goal

1993 Mazda FD RX-7, built LS7, T56 Magnum, Holley HP, Davis Tech TC, 8.8" 3.73 Cobra IRS diff, DSS axles, Ohlins coilovers, big brakes.
CCW 18x11 front 315/30/18's and 18x12.5 rear on 335/30/18 RA1's, 2850lbs
10.31@137mph 165mph Shift-Sector 1/2 mile speed
441ci AllPro headed motor and 200lb weigh reduction in the works....
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Unread 01-16-2013, 07:54 PM
Reactor Reactor is offline
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Join Date: Apr 2005
Posts: 4

Check out Rockland Standard Gear. You can get a new magnum T56 with the ZR1 corvette close ratio gear set. It has a 2.29 first gear and works great with a 4.10 rear. Not cheap, but you get what you pay for. Reactor
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Unread 02-19-2013, 11:48 AM
broken1234 broken1234 is offline
Join Date: Feb 2012
Posts: 64

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...
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Unread 02-19-2013, 12:42 PM
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Ron in SoCal Ron in SoCal is offline
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Join Date: Dec 2009
Posts: 5,016

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...
Ron in SoCal
69 Camaro in progress

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Unread 02-19-2013, 11:18 PM
broken1234 broken1234 is offline
Join Date: Feb 2012
Posts: 64

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?
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Unread 02-19-2013, 11:55 PM
takid455 takid455 is offline
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Join Date: Feb 2007
Posts: 231

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.
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