Drenth gearboxes

[D K]

Originally Posted by Reaper

Tko. Magnum won't fit in the tunnel. Liberty gear says they can fix that. But I have no personal experience with a dog faced tremec at 7k rpm.

I think what you meant to say was face plated.

Its not the same thing as a dog box.

Magnum will fit, but with a lot of mods.


TKO was designed to shift below 6500 and no matter what people tell you, they will have a hard time shifting at 7500. At 9000.....forget it.

Also, thats a 5 speed, so you are giving up a LOT of performance.

[Reaper]

Originally Posted by dwx

They are as is the Hollinger. The proper race transmissions are definitely going to be easier to work on and deal with than an OEM one which isn't really meant to ever come apart.

The Hollinger box was used in the GT86 rally america car Nameless was a part of. Not the same exact box since it was a custom job to fit it, but same basic gearbox/gearset. That car was turbo using a EFR of some sort, but wasn't pushing a ton of horsepower.

Does anyone know of anyone making a replacement dog/straight cut gearset for the stock transmission case?

Yes. I was working with a shop to do this. The end result was not to my liking.

[Reaper]

Originally Posted by D K

I think what you meant to say was face plated.
YES


Magnum will fit, but with a lot of mods.
YOU MUST CUT THE TUNNEL


TKO was designed to shift below 6500 and no matter what people tell you, they will have a hard time shifting at 7500. At 9000.....forget it.
I UNDER STAND, I JUST SAID LIBERTY GEAR SAYS OTHERWISE AND THEY ARE PRETTY REPUTABLE. I HAVE NO FIRST HAND EXPERIENCE THOUGH.


Also, thats a 5 speed, so you are giving up a LOT of performance.
IT GIVE UP A GEAR TO STOP BREAKING OEM TRANSMISSIONS AND NOT HAVE TO PAY 20K FOR A SEQUENTIAL. WITH 400WTQ I'M NOT TOO WORRIED BUT THAT COMBINED WITH THE PRICE AND HIGH RPM SHIFTING PROBLEMS HAS STOPPED ME FROM DOING IT AS OF NOW.

.
Not yelling just didn't know how to change font/color on tapatalk mobile.

[mike the snake]

Found this on CL.

https://sfbay.craigslist.org/eby/pts/4782312741.html

[Reaper]

Originally Posted by mike the snake

Found this on CL.

https://sfbay.craigslist.org/eby/pts/4782312741.html

That's great if you don't ever need reverse or first gear. Or to ever find a clutch/starter/flywheel combo that will fit the frs.

[D K]

Thats not that hard to do.

You just need the clutch disc that fits the spline of the input shaft.


What would be hard is to find th correct length input shaft and/or making a bellhousing to fit the existing one.

Originally Posted by Reaper

That's great if you don't ever need reverse or first gear. Or to ever find a clutch/starter/flywheel combo that will fit the frs.

[bem75]

Sorry for reviving this very old thread, but has anyone installed Drenth gearbox in one of these cars? The Drenth rep stopped by our paddock at Sebring this past weekend. Following my discussion with him, I spoke with a very large race team that has run all types of sequential gearboxes. They run the Drenth in 11 of their cars and gave me some good feedback. Curious if anyone has installed one in an FR-S/BRZ.