Install Success

[BigSur]

Originally Posted by JackandJanet

It's fine to bring it up here, but the guys at f150online might have some ideas too.

It COULD be that your Torque Converter is locking too soon or is locked as you do the 1-2 upshift. This is one of the things you can monitor on the Gryphon and CS/CTS platforms. If you see a little "padlock" symbol next to the "Commanded" gear number, the TC is locked. That would tend to make the shift feel harder. The TC lock point is governed by both speed and power demand, so if the power demand is low, it may be locking prematurely.

I've felt what you describe at times pulling up a "mild" hill with a trailer and the TC locks in 3rd. Then, when it upshifts to 4th, it does so without unlocking and the shift is quite "harsh". I've also felt something like this at times when at a lower speed where I've come off the gas and then I step down on the pedal again, but not too hard - it feels like the transmission abruptly drops into a lower gear and there's a hard "clunk" and "lurch".

In Custom Options, you can delay the TC locking for any of the gears, by ADDING to the "zero" value that you'll see there. You can change it +/-2 in 1st, +/-3 in 2nd, +/-5 in 3rd and +/-10 in 4th I think. If you put in negative values, it causes the TC to lock sooner and stay locked longer as speed decreases. You can also adjust the part throttle up/downshifts the same way.

You might try playing with those settings. I've cranked my TC lock/unlock and part throttle up/downshift as far negative as they'll go on my non-towing tune, because I want the engine at the lowest possible RPM for cruising. The WOT power is still there though.

This is an example of what I was talking about when I said to drive it a while to see if there's anything you DON'T like. If you were to decrease your upshift/downshift 1-2 settings and increase the TC lock/unlock settings for 1st and possibly 2nd gear, it might eliminate what you are feeling.

- Jack

Jack, I wanted to put this issue back in front at the right post so I have one consistent thread to refer to when I plan to adjust my settings.

SO, to clarify...I understand that delaying the TC locking in 1st or 2nd may help by adding to the zero. In the last sentence of your post, exactly which setting would I play with to "decrease your upshift/downshift 1-2 settings"? I'm not sure I'm clear on this change, i.e. what I'm changing and to what capacity. Thanks for clarifying if you don't mind.

Also, what display should I be viewing to monitor the TC? I'm heading out a little later to start playing around with this. Want to make sure I'm prepared and know what the heck I'm doing. Much appreciated.

[BigSur]

And just to add one more note to this, I've also noticed that the truck seems to be doing this more when it's hot and I've been running it for awhile. Yesterday, it was doing it repeatedly after climbing some hills and after a 180 mile drive. I've let the truck sit overnight and just took it for a drive. Not doing it now. What is a typical transmission coolant temp after running for awhile? I was in the 170's last night driving up here.

[88Racing]

What have been your ambient temps?>>Or what's the weather like in the area you've been driving in?

For example the last few times the garage queen has been out, its been mid 70s to lower 80s. Driving her at approximately 80 mph with varying elevation of 500ft. The tft average was 154 over a 60 mile trip.
My CHT was 208-210.

The comm gear pid is the one to view for tc lockup.
It will show what gear your tranny is using and a paddlelock as a symbol for the torque convertor lockup.

[BigSur]

Originally Posted by 88Racing

What have been your ambient temps?>>Or what's the weather like in the area you've been driving in?

For example the last few times the garage queen has been out, its been mid 70s to lower 80s. Driving her at approximately 80 mph with varying elevation of 500ft. The tft average was 154 over a 60 mile trip.
My CHT was 208-210.

The comm gear pid is the one to view for tc lockup.
It will show what gear your tranny is using and a paddlelock as a symbol for the torque convertor lockup.

THanks 88!!! Ambient temps where I'm at have been in the 90's to low 100s this past week. My TFT is usually around 156 but will increase to 175+ at times. If my assumption is correct....the more I think about it....the shifting seems to be an issue when the truck is really hot ONLY. I'm realizing that its amost never repeatable when the truck has been sitting. Might take some more research.

[88Racing]

I really don't know the overall condition or maintenance of your truck to speculate anymore.
And......
I never recorded the temps last year when I was driving in 100+ weather.

Maybe its time for a pan drop and change the filter and add some new fluid?

Some others have done a flush. But don't get the flush done with the chemical additives.

Just some thoughts.

Here's generic tables I found on fluid temps vs. break down of fluid over miles driven.

[BigSur]

Originally Posted by 88Racing

I really don't know the overall condition or maintenance of your truck to speculate anymore.
And......
I never recorded the temps last year when I was driving in 100+ weather.

Maybe its time for a pan drop and change the filter and add some new fluid?

Some others have done a flush. But don't get the flush done with the chemical additives.

Just some thoughts.

Here's generic tables I found on fluid temps vs. break down of fluid over miles driven.

Thanks again. I've had other recommendations for a flush, so I think I'm getting that done regardless. Appreciate the charts man...good reference to have.

[BigSur]

And as a follow up, for those who are following this.....I placed the "comm gear" in the display to monitor the TC. It is only locking when in O/D...that's it. Not sure if that's good or not.