5r110 guru's... step right in

[KCTurbos]

I am getting closer to having my race truck together. I had debated a 4r swap but I already have a fully built 5r110 by Andy Warren so I am going to run it. He has been great to deal with and stands by his products.

I am thinking about possibly getting a PCS controller to mess around with the shifting which got me to thinking...

Is there any shifting pattern that can be acheived so we skip the crappy synchronous shifts like the 3-5 shift? Also maybe eliminating an extra shift?

Maybe 1-2-3-4-6?
Maybe 2-3-4-6?

Any other interesting ideas?

 

[IHPowerstroke7.3]

Didn't someone already make a 5r shift like a 3 speed?

 

[fordboy11]

Did you talk to Jesse? I know in his tune he's gotten rid of predictive shifting. Says it helps a lot.

 

[KCTurbos]

Did you talk to Jesse? I know in his tune he's gotten rid of predictive shifting. Says it helps a lot.

Jesse is a busy man LOL... I try not to bug him too much.

I will try hitting him up. I have heard different views on getting rid of the predictive shifting.


What I am trying to get rid of is the "synchronous" shifts. Like the notorious, problematic 3-5 shift that tends to cause issues.

I have done a lot of math and I don't think a 3 speed is possible... but maybe a 4 speed. Seems like 2-3-4-6 would be the way to go.

 

[sootie]

A three speed is possible. Talk to Mike haller

 

[KCTurbos]

A three speed is possible. Talk to Mike haller

I am very curious to hear about that... is Mike haller here on the forums?

A 3 sp is definitely possible. But would it work well???

Assuming you use OD. I did a lot of math, and unless I am missing something the only way to make a 3sp work would be by skipping a gear. No matter which gear you skip you will end up maxing out the rpms to hit 4400rpms, and then drop into the next gear at 2200rpms. You will lose a TON of HP at 2200rpms.


Now if you don't use OD then it is very possible. 2-3-4 or 2-3-5. But I don't good results from skipping any gears.

 

[sootie]

he is on here...i think a sponsor. don't remember his screen name but company is hallers repair

 

[slc dzl]

he is on here...i think a sponsor. don't remember his screen name but company is hallers repair

I believe it is mike@haller's

 

[Mark Kovalsky]

You don't want all synchronous shifts. The 3-5 IS a synchronous shift. You want non-synchronous, like the 1-2 and 5-6.

The 1-2 applies the overdrive clutch. It's totally non-synchronous.

The 2-3 releases the overdrive and applies the intermediate. Each of these events take about 400 milliseconds to complete. If one finishes before the other by a difference of more than 0.030 seconds the shift is going to suck. If the overdrive releases before the intermediate is on the trans goes back to first gear, then shifts 1-3. You'll get an engine speed flare and damage the intermediate clutch. If the intermediate applies before the overdrive releases you now have shifted 2-4, then when the overdrive finishes it's release you go back to third gear. The intermediate won't last long doing that, either.

The 3-5 is a synchronous shift. It also takes about 0.400 seconds, and once again it's two clutches that have to finish what they are doing within about 0.030 seconds of each other. If the intermediate releases before the direct applies the trans goes back to first gear again and then shifts 1-5. The direct can only do this a couple times MAX and then it's burnt to a crisp. If the direct applies before the intermediate releases you have a tie up. This is as bad as it gets. All elements of the planetary are held from turning. The output shaft stops turning RIGHT NOW and so do the rear wheels. If you have enough power going into the transmission something mechanical will break. Pieces may go through the pan and the case. It will be catastrophic.

The 5-6 shift is identical to the 1-2. The overdrive clutch applies.

Fourth gear is third gear with the overdrive applied. If you shift 1-2-3-4-6 you change the 3-4 to a non-synchronous shift. But then the 4-6 is synchronous, it is the 3-5 but the overdrive clutch is on and stays on, so it is not part of the shift.

To go from 2-4 you keep the overdrive on and bring on the intermediate. That would be non-synchronous. 1-2-4-6 would be non-synch, non-synch, synch.

I haven't heard of anyone successfully programming a PCS to make a 5R110 shift. Frankly I'd be very surprised if it has the computer power and the required inputs to make this happen, not to mention someone with the programming knowledge to make all of this happen.

Good luck with this project. I'm interested to see how you do this and if you can make it work.