Transbrake 6r80 - Mustang Evolution

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Old 07-07-2016, 02:10 PM   #1
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Transbrake 6r80

Has anyone put a transbrake on a stock gt with the 6r80 just trying to figure out if it helped at the track any on a stock car
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Old 07-07-2016, 02:39 PM   #2
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**** yeah it'll help, even with the gnat's bunghole tight converter, you'll get a few hundred more rpm stall. With a converter accompaniment, it'll really help pull 60s down.
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Old 07-07-2016, 02:41 PM   #3
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A converter is coming asap especially if I get the transbrake and what brand transbrake would you recommend
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Old 07-07-2016, 04:16 PM   #4
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A traditional transbrake is just a couple relays and some wiring but, JMS makes a splice-in digital one for a couple hundred bucks. I'd go that way.
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Old 07-12-2016, 09:16 PM   #5
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Just my own 2 cents after drag racing with automatics longer than some of you have been alive...putting a trans brake on a stock car is a total waste of money and and time. Also, unless you have a good oil cooler you run the risk of burning the trans to ground...the amount of heat generated by a trans brake can cook trans fluid in short order.
Usually a trans brake puts it between 1st and reverse...and when you hit the button first is instantly engaged...GrabberBlue ran a 6R80 with an aftermarket converter and turned in the low 11's...he didn't have a trans brake and you don't need one either...unless you plan on some high 9's or low 10's...IMHO
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Old 07-12-2016, 09:25 PM   #6
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It's not a total waste on this platform. Decent gains on the stock converter, very strong gains with one.

Well proven and this trans takes this kind of thing better than Ford trans of old, barring the also excellent 4r70W.

I've been around a good long while but I don't let previously held rules of thumb get in the way of learning something new.
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Old 07-12-2016, 11:36 PM   #7
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We are talking a stock Coyote and driven mostly on the street...right??? My question is what are his 60' times now and how much is it going to improve...my guess is not much. If he puts a converter in the car sure he probably will shave off more...how much more. I guess it just depends on what he wants or expects out a mostly stock car...If it were me I'd just to go out and have fun at the strip leave the drivetrain the way it is and concentrate on the suspension. Then when he has amassed enough seat time to cut the tree in the .04 to .03 reaction time and has consistant 60' times....start going after the engine/trans with a converter at the top of my list.
As for the Ford transmission of old...the C4 is still being used today behind motors from 600hp to over 1000hp....still the smallest and lightest.
There are so many ways to improve 60' times...after dialing in my Maverick I changed the merge collector and loosened my converter and gained .15 sec in the 60' going from a 1.401 to a 1.250
I'm open to new ideas and granted I had been running a Powerglide long before it became popular...Marv Ripes built my first one back in the early 70's and my last one was built by Mike's Transmission in Lancaster, CA...and I was only running 9.80's with a single carb 408...with that said I have to admit my knowledge of the new Ford auto trans is very limited although I have seen new Cobra Jets running in the very low 8's...of course they run a TH400 design Ford calls the T5...go figure!
As for "rules of thumb", there are no rules of thumb when it comes to drag racing...the minute you go that way...you are watching someones tail lights on the top end.
Yes...I'm older than dirt and with 40+ years of racing experience occasionally I do fall back on my experience...You should be learning something new everyday although hopefully it's not just from surfing the internet...and for the first time in my life I'm learning what a twin turbo motor is all about hooked up to 6spd Tremec in a car with 4 doors.
Sorry I got carried away with the post...I'll try and be shorter next time.
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Old 07-13-2016, 03:55 AM   #8
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I don't think a transbrake will do much on a stock converter.
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Old 07-13-2016, 07:24 AM   #9
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Of course a converter is worth more than a transbrake. I said that. A converter can cut a 1/2 sec or more off a Coyote 1/4, easily. The transbrake will definitely work better with that. However, it has been adequately demonstrated that there is a meaningful gain to be had with a transbrake, even with the stock converter. Especially with a modern, digital transbrake, a plug-and-play $200 component, you can get a couple rpm more stall, shave a few tenths off the 60 and maybe that's significant enough to be worth it to some. Footbraking this car, as it sits, is almost useless.

I'll agree that it isn't the first mod in my mind as far as an auto goes but, it won't just burn down the 6R80 auto like it would on a stock trans of old, even the C4, which was not that strong a trans until built properly.
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