The solution was a timing based module system that activates the converter only after the transmission has shifted into 4thgear. The basic operation is quite simple. When the transmission has shifted into 4th gear, the pressure in the valve body closes a pressure switch that then creates a ground input.
This completed circuit activates a 10 second delay timer that when finished, connects the ground signal to the torque converter lock up solenoid, thus locking the converter clutch in. This connection stays active as long as the transmission is in 4th gear and the circuit is completed.
This pulls the converter out of lock up to allow the car to easily accelerate back up to speed before the lock up re-engages. The entire lock up system can be installed by anyone with minimal mechanical skills.
The internal components are all accessed by removal of the transmission pan and filter only. There are no special tools or procedures required. We include every component needed to connect the system and get it working properly.
This ensures that whether you have a newly re-built unit, or a unit that has been in service for years, all the parts are there and correct for proper operation. When looking at the kit you may be wondering why we included a new solenoid and pressure switch. The reason being is that GM used a variety of ways to engage the lock up depending on what the engineers were trying to achieve. Each method uses slightly different wiring options on the solenoid or different pressure switches.
Even if you have a brand new rebuilt transmission we encourage you to install the entire kit to ensure that it functions exactly as we have designed it.
Regardless of how you are finalizing the installation of your transmission it is critical that you have some way of turning your lock up on and off. You are currently viewing as a guest!
To get full-access, you need to register for a FREE account. Manually locking up the torque converter Discussion in ' 2nd Gen. Post Reply. Has anyone ever done something like thing on our A trans? How well does this tranny respond to this? I've been researching valve body upgrades and came across a company called West Coast Cruisers.
I figure this would really help towing and goin slow down hill. My thinking is: -Less heat build up from the torque converter, especially when going slow and loaded up. I know on the older dodge diesel auto, you had to do this kind of mod unless you wanted to replace the tranny all the time. Interested to hear more about the principle. It would help with gas mileage too I would think. ItalynStylion , Oct 19, The tranny not only locks and unlocks, but can achieve different levels of "lock up" in gears 3 thru 5.
Toyota seems to have gotten it right, so I cant see a reason to mess with it. Rich , Oct 19, The transfer case input shaft on the auto is MUCH smaller than the input shaft used in the manual transmission. Obviously they were anticipating much lower shock loads with the juice tranny. If you defeat that, the result could be a broken shaft. Having the torque converter lock and unlock manually is a BAD idea. The only people that really need them are the diesel crowd and the drag racers.
The converter locks up at mph anyways and stays locked up until you either A. Tap the breaks.
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