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AWD Switch, very cool
Posted 04 November 2002 - 09:38 AM
The tranny fluid pressure is limited with a solenoid, that is controlled by the ECU. It is an electro-mechanical-fluid based system. ECU controls mechanical solenoid, which in turn limits fluid pressure.
By changing the electrical signal, you can manipulate torque split to the rear.
In manual transmission cars, the torque split is controlled by a sealed center viscious differential. It is a fluid-mechanical system. The diff has plates that reside in this fluid. When a wheel in the front or rear spins, the drive shaft spins faster. This causes the plates in the fluid to spin faster then the other side. This creates heat and essentially locks up the other plates to the same speed as the faster spinning ones.
That's an overly simplified description. But there's no way to change how that sealed unit works.
wjmgl10: For automatics I am pretty sure you don't want any of the wheels on the ground. The reason is that the engine needs to be running to lubricate the gears & everything on the tranny. If you have componants moving without lubrication......you cause problems.
For the manual trannies. The gears are self-lubricating. As they turn, they pickup gear oil to lubricate themselves. So you can technically tow an AWD manual trans. car with all four wheels on the ground. If I were having my car towed....I'd probably want it on a flat bed though....
Posted 04 November 2002 - 05:51 PM
Posted 04 November 2002 - 06:40 PM
thanks for clearing that up, Leagcy777.
Posted 05 November 2002 - 08:33 AM
When we are talking about torque split. I am mainly talking about under normal driving conditions. Like when you're driving down the highway and there is no tire slippage going on. For manual trans cars, under normal driving conditions, torque split is 50/50.
Once slip occurs the torque split can pretty much be an infinate amount of combinations.
Posted 05 November 2002 - 06:31 PM
Posted 06 November 2002 - 06:22 PM
Posted 06 November 2002 - 09:14 PM
i.e. find the wire from the duty c solenoid that goes to the ECU, splice a toggle switch inline.......and flip it off for 50/50 split
Posted 08 November 2002 - 11:15 PM
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