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Discussion Starter · #21 ·
Damn that’s nasty! What exactly gave out?
first two transmissions i was powershifting when racing, this last one i was just regularly shifting, fourth gear only gear that's working in all 3 failed gearboxes, so lost 12356R
 

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2019 Challenger Hellcat Widebody (destroyer grey)
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This may or may not help in your situation because I'm not sure my trans will fit the Challenger. But I have a brand new fully built RPM/GForce T56 with billet dog ring gears that will butter shift to 11k rpm and hold over 1000 lbft for sale. Not sure if the T56 is much different in size as the TR6060 to be honest, but if they are similar, this may solve your issues. I had RPM/GForce build it for my 1100 whp S2000 but ended up going with the Samsonas sequential instead, so I'm selling the T56. It also comes with a Quicktime scattershield, but the front flange would need to be changed to fit the hellcat, if it can be used. Also comes with a MGW shifter.

Anyway, I'm looking to get $6800 for the built T56 if you're interested. I have over $8k in it.
 

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Discussion Starter · #23 ·
This may or may not help in your situation because I'm not sure my trans will fit the Challenger. But I have a brand new fully built RPM/GForce T56 with billet dog ring gears that will butter shift to 11k rpm and hold over 1000 lbft for sale. Not sure if the T56 is much different in size as the TR6060 to be honest, but if they are similar, this may solve your issues. I had RPM/GForce build it for my 1100 whp S2000 but ended up going with the Samsonas sequential instead, so I'm selling the T56. It also comes with a Quicktime scattershield, but the front flange would need to be changed to fit the hellcat, if it can be used. Also comes with a MGW shifter.

Anyway, I'm looking to get $6800 for the built T56 if you're interested. I have over $8k in it.
i hear those dog ring are mostly good in quarter mile dig cars, which is only 25% of racing i do the rest is roll, also something like they wear out real quick.? i'm gonna look into it man, for now tho im leaning towards a rossler unit XHD TH400, this is my third manual in the same year...
 

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i hear those dog ring are mostly good in quarter mile dig cars, which is only 25% of racing i do the rest is roll, also something like they wear out real quick.? i'm gonna look into it man, for now tho im leaning towards a rossler unit XHD TH400, this is my third manual in the same year...
They definitely don't wear fast but they do shift way faster than synchro gearsets. My S2000 is a street car 75% of the time as well and shifting a dog ring geared box on the street isn't bad at all to be honest. Hell, if you do it right, you don't even need to use the clutch when power shifting. Kind of like a street bike gearbox.

Just something to think about.
 

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Discussion Starter · #25 ·
They definitely don't wear fast but they do shift way faster than synchro gearsets. My S2000 is a street car 75% of the time as well and shifting a dog ring geared box on the street isn't bad at all to be honest. Hell, if you do it right, you don't even need to use the clutch when power shifting. Kind of like a street bike gearbox.

Just something to think about.
definitely, how ever man i spoke to brad from liberty today and he said that biggest problem with manual version of cars is that 4500lb weight and torque, and thats why they keep on breaking, plus i am planning to do KB and not sure a manual is gonna be able to hold that.
 

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will do, just got of the phone with craig ,owner of liberty gears, mostly likely getting a new tr6060 and face plating it their package is $6300 and 3200 for new tremec, hopefully he can give me something for my core.
Why not send the core in and get a rebuilt for 2500, then give THAT to the gear dude?

I don't see why these gearboxes are going so bad so often. It seems suspicious to me. I know we are in big rig torque territory.

I know you chose a TH400 dumbification for sheer strength, but face PLATING? Not face-hardening? Why don't you go Lenco? They make a six-speed, or as many speeds as you want up to 1:1, like the TH400, then put a 2.62 rear end in it to keep the revs from going too high. The TH400 is, engineering-wise an auto-shifted Lenco with fewer planetary gear sets.

Since the Lenco is as many mini-trannies bolted front-to-back as you want, you could have 15 speeds if you like, and put a 1:1 custom-made ring and pinion in the rear, but you'd want a heck of a driveshaft, as your torque to the driveshaft at any given road speed would be 2.62 to 3.70x as high as stock.
 

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Discussion Starter · #28 ·
This may or may not help in your situation because I'm not sure my trans will fit the Challenger. But I have a brand new fully built RPM/GForce T56 with billet dog ring gears that will butter shift to 11k rpm and hold over 1000 lbft for sale. Not sure if the T56 is much different in size as the TR6060 to be honest, but if they are similar, this may solve your issues. I had RPM/GForce build it for my 1100 whp S2000 but ended up going with the Samsonas sequential instead, so I'm selling the T56. It also comes with a Quicktime scattershield, but the front flange would need to be changed to fit the hellcat, if it can be used. Also comes with a MGW shifter.

Anyway, I'm looking to get $6800 for the built T56 if you're interested. I have over $8k in it.
hey man so it does bolt up , how ever will need a custom drive shaft, also when was this transmission built?
 

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definitely, how ever man i spoke to brad from liberty today and he said that biggest problem with manual version of cars is that 4500lb weight and torque, and thats why they keep on breaking, plus i am planning to do KB and not sure a manual is gonna be able to hold that.
This is why I am spending so much attention on weight reduction first. The net gain in efficiency and reliability far it weighs throwing power at it in a stick car. A8s, have fun pulley down.

The TH400 conversion is the smart money, especially if you add a GV OD.
 

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Discussion Starter · #30 ·
This is why I am spending so much attention on weight reduction first. The net gain in efficiency and reliability far it weighs throwing power at it in a stick car. A8s, have fun pulley down.

The TH400 conversion is the smart money, especially if you add a GV OD.
yep, my heart says manual, but my brain dictates TH400, i have no choice but to do the logical choice, especially after all these failures, hopes are high that rossler has some inventory.
 

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hey man so it does bolt up , how ever will need a custom drive shaft, also when was this transmission built?
RPM built it about 3 years ago, but it has never been used, brand new.

My s2000 has been a slow build for me and the reason the T56 hadn't been used yet. Actually took the car to Carey Bales (if you know the name) in the Indianapolis area to finish it for me since I have limited time anymore. That's when we decided to go ahead with the Samsonas sequential over the the T56 for my needs. So the T56 has been sitting in my garage wrapped in plastic bags.
 

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i will let you know man, good do a couple measurements , call a couple people and how things work, definitely an option, do you have the spec sheet? , ty
Sounds good man.

Let me see if I still have the spec sheet. If not, my file is in RPM's system and they can pull it.
 

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Here is my sale receipt that shows the build specs. If you want a true spec sheet, i can contact RPM and get that for you.
577389
 

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can you send a few pictures aswell, timing for me is important rn so, will get into it asap, also where are you located?
Sure, hang tight.

I'm located near Louisville KY, in Sellersburg IN.
 

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577391
577392
577393
 

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This trans build has won stick shift records btw if you ever follow RPM.
 
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