Very good build , I've installed countless Transpaks and Man. Valvebody's but I've never a transbrake installed either. Still stumps me by how those parts are not utilized and how it still works functions. Great job.
Awesome video.. There are 2 more small upgrades to add. Toss the plastic bushing, replace them with roller bearings, and upgrade the sprag. Take a look at precision transmission video on th350/ th400. He also talks about mods to make a mvb out of the stock vb.
Best transbrake install video on RU-vid! Thanks for creating. Couple questions: do you street drive the car that has this transmission with the transbrake? How “streetable” is it or would you not recommend. Thanks again!!
This was more of a track car, but I would drive it on the street too. Had more to do with the car than the transmission. Roll cage, no interior etc. But it was registered, had lights/blinkers etc. I would drive to to the track sometimes.
Interesting how the new valve body fluid circuitry is much simpler than the Oem version with all its automatic shift features. No vacuum modulation, speed governor etc. can't wait to see it in action.
When you get to the center support part of the video, you mention not needing remove it unless you're rebuilding the trans at the same time. Then later, you have the center support in hand and talk about removing the center sealing ring. I assume that can be done with the center support still mounted securely in the case? Maybe with a pick?
@blaserbuilds I have a TSI transmission TH400 (aftermarket case) and their transbrake like you show. I've had issues where the line pressure is too high. At idle in neutral it is 275#, in 1st 300#, in 2nd 300#, in 3rd/drive it's 200#. It blows fluid out the vent and I've checked it (it's clear), installed a catch can (mounted up high to allow drain back), etc. No idea why it's so high in pressure and I've put in a different pump and it does it as well. Any ideas on the culprit? Valve body, Case flaw, other?
Very informative! I recently purchased an el Camino to use as a drag and drive event car. BBC, 4.10 Posi 12 bolt and TH-400. I'd like to install a trans brake but thought I would run it with just a line lock first. The previous owner was not the car builder and he didn't know much about it. The trans has a shift kit in it now as it doesn't shift until 4K RPM and shifts quite hard which is fine for racing but not so fun for street driving. I don't know what converter is in it. I'm just kind of learning about automatics so what controls the shift point on them and what is the best way to change it. Should I go to a manual valve body?
Do you have a set of injectors you would sell? Snake eater or?? Need 100# or more but anything is better than nothing. Hunter is covered up so i thought i would try you.
Nice work! Does this require you to hold the transbrake button for reverse? Also is reverse in the same R position or in the Neutral like some other reverse valve body W/brake?
And you really should be wearing gloves you're just absorbing all that fluid. I knew a mechanic that had alot of heavy metals built up in his body from working on transmissions over the years and he was in bad shape
@@BlaserBuilds I have been searching youtube for a good vid that shows how a transbrake works but not found much. This video helps a decent amount by showing the parts but I'd still like to see some sort of animation that shows exactly whats happening. Is it just rerouting pressure to apply 1st and reverse some how?
@@umakemerandy3669 Yes, Solenoid routes line pressure oil to reverse circuit while in 1st gear. When button/solenoid releases, it exhausts fluid from reverse circuit to "release" and launch the car.
@@BlaserBuilds Ah yes, thank you! Now I see the purpose of the hole you drilled. I also now understand how it is possible to be able to bump or creep. That never made sense to me but the trans being in first gear primarily, then adding/releasing reverse gear pressure makes sense. Should whip up a proper video about this titled "how a transbrake works" or somethin, I bet it would get a lot of views.