1.9K views · 105 reactions | 4L60E Transbrake Valve Body update. We've had lots of inquiries about these. We have one off the machine now. We will make some valves and parts for them next week and make some changes to the separator plate design. We should have one on the dyno in a couple of weeks and then ready to test on a vehicle. Realistically a month or so until these will be ready to send out to a handful of people to test. | Jake's Performance | Facebook