Sully
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has anyone had any luck wiring solenoids up for a trans brake in the 5r? which gears should be activated and is anything breaking?
Trans brake questions
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Sully
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guess it's gonna be trial and error..wish me luck
05wh250
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I don't know on these but my drag car had a power glide in it and it locked it between 1st and reverse.
Sully
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I'm gonna indirectly aim this at mark
initial thoughts after a quick read through of the ford manual.while in 1st gear (t/h on) apply the direct and internediate clutches causing a tie.temporarily fool the pcm by maintaining the pressure switches for both are closed or it may fight back to limit potential damage by releasing the forward clutch.so 4 relays are needed.intermediate and direct are pressure controlling solenoids,intermediate being directly proportional pressure to amperage supplied(less amps=less pressure),direct being inversely proportional(less amps= more pressure).would diodes be needed so the pcm doesnt see the change and assume a short or open circuit?any thoughts, am i on the right track? 3...2...1....go
initial thoughts after a quick read through of the ford manual.while in 1st gear (t/h on) apply the direct and internediate clutches causing a tie.temporarily fool the pcm by maintaining the pressure switches for both are closed or it may fight back to limit potential damage by releasing the forward clutch.so 4 relays are needed.intermediate and direct are pressure controlling solenoids,intermediate being directly proportional pressure to amperage supplied(less amps=less pressure),direct being inversely proportional(less amps= more pressure).would diodes be needed so the pcm doesnt see the change and assume a short or open circuit?any thoughts, am i on the right track? 3...2...1....go
Mark Kovalsky
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First, there are no pressure switches used in a TorqShift transmission. There were pressure switches installed in the first part of 2003, but the software never looked at them. They turned out to be so unreliable that we never used them. So if you have them you can just ignore them. The PCM does.
I suppose the diodes will keep the PCM from knowing that the solenoids are on. I don't know if this will work or not, it is not something I ever looked at, or even considered.
I haven't looked at a TorqShift clutch application chart in about a decade, so maybe my recollection is a bit foggy. In first gear, tow/haul on, with the direct and intermediate clutches applied I think you get fourth gear (1:1 ratio) with coast braking, not a tie up. Maybe I'm wrong, it's been a long time....
I suppose the diodes will keep the PCM from knowing that the solenoids are on. I don't know if this will work or not, it is not something I ever looked at, or even considered.
I haven't looked at a TorqShift clutch application chart in about a decade, so maybe my recollection is a bit foggy. In first gear, tow/haul on, with the direct and intermediate clutches applied I think you get fourth gear (1:1 ratio) with coast braking, not a tie up. Maybe I'm wrong, it's been a long time....
I don't think that will be a problem since there is no valve body in a TorqShift transmission.
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Sully
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that's good to know on the switches.I'm a little fuzzy still on the shift theory since i haven't been inside one mechanically yet.the ford book says the intermediate and direct aren't ever applied together so I'm assuming.does this pic help any mark?
Sully
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my next question refers to the solenoids and what pressure = what amperage.i see the guys with the converter lock up switch are using a 22ohm resistor.how did they come to that figure? is max pressure to much or is it ok for the short time being used?there are no details that i have found thus far that describe the scale other than all or none.
on edit i found in the manual it's 0-1amp scale.
on edit i found in the manual it's 0-1amp scale.
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Mark Kovalsky
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Yes, it does. It *WILL* tie up with the intermediate and direct on at the same time. The brain must have been in neutral on my last post....
that's good to know on the switches.I'm a little fuzzy still on the shift theory since i haven't been inside one mechanically yet.the ford book says the intermediate and direct aren't ever applied together so I'm assuming.does this pic help any mark?
Demon
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Why is there a 6th gear listed on that chart if its for a 5r110?
Motostroker
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Because the 5R is and it is not a 6 speed. It uses different shift patterns when the temp outside is cold
Mark Kovalsky
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Fourth gear is 1.09:1 ratio. It is only used when the trans is below 0°F or during certain speed kickdown shifts from sixth gear (0.71:1 ratio.) Fifth gear is 1:1 and used any time fourth is not used.
Demon
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Well no ****. That's a new nugget to file away. Right on. Thanks.
Sully
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sounds good, thanks mark. ill report back what happens.I'm gonna try without diodes first to simplify it.
Demon
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Generally speaking a trans brake is the fastest/easiest way to launch an automatic at the drag strip. They jump out of the hole HARD!
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That's what I wanted to know was the chassis. If your suspension is right it should work good since you won't be using some of your travel to spool.
Let us know how it works
Sent from my SCH-I545 using Tapatalk 2
Let us know how it works
Sent from my SCH-I545 using Tapatalk 2
Demon
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Sorry I misunderstood you when you asked why would he want to do that.
