"Throttle Cable" / Trans Line pressure cable adjustment in 2021

[jross20]

So I spend a long time reading old threads and posts and couldn't find clear information on adjusting the throttle/kickdown/line pressure cable. Whatever we call it, the cable that goes from the butterfly to the transmission.

I read that the whole, 1mm of the bead sticking out thing... But my question is does that still apply with a 21 year old cable? Should the cable have a lot of slack? Obviously I get it shouldn't being pulling it, but the cable can pull quite a lot more than the butterfly can pull it at 1mm sticking out.

Where do you have yours set?

Also... Merry Christmas Eve :rockon:

 

[FD7683]

Merry Christmas. I found that my 22 year old throttle cable has quite some stretch for its age but I have it tight enough to have a "no slack but a little play" pedal for a daily driver. It is a bit maxed out on the adjustment though so I might have to replace the cable one day.

I personally don't mess with the kickdown cable nor the cruise control which is very loose for some odd reason.....

 

[cl4Rk]

"Throttle Cable" / Trans Line pressure cable adjustment in 2021

Some of the play in the throttle cable might be from the little pedal-side rubber bushing wearing out:

https://www.toyota-4runner.org/3693552-post33106.html

 

[jgue467]

I would not assume the cable has stretched. Mine is at 336K, no adjustments ever, instant throttle response and smooth shifts up and down, I don't like messing with stuff that works, but that's my opinion....Luck all and Merry Christmas!!

 

[2021nightshade4x4]

"Throttle Cable" / Trans Line pressure cable adjustment in 2021

If there’s so much inconsistency in things like the parking brake cable tension, I’m going with “anything’s possible” with the throttle cable.


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[Bad Luck]

So I spend a long time reading old threads and posts and couldn't find clear information on adjusting the throttle/kickdown/line pressure cable. Whatever we call it, the cable that goes from the butterfly to the transmission.

I read that the whole, 1mm of the bead sticking out thing... But my question is does that still apply with a 21 year old cable? Should the cable have a lot of slack? Obviously I get it shouldn't being pulling it, but the cable can pull quite a lot more than the butterfly can pull it at 1mm sticking out.

Where do you have yours set?

Also... Merry Christmas Eve :rockon:

Mine has a bit of play. The correct way to adjust it per the fsm involves using a hydraulic fluid pressure gauge and adjusting the cable until the pressure is in a certain range. I just loosened/tightened mine until I felt good with low throttle and full throttle shifting

EDIT: when I first bought mine the cable was too tight and I thought I had driveshaft joint or differential backlash issues because even warm it would slam whenever I shifted from park or neutral into drive or reverse.

 

[jross20]

Hey guys thanks for the replies, sorry for the delay Christmas was pretty crazy.. .

So I tried setting it to where the end of the metal stopper was equal with the end of the rubber grommet, but as in the right side of the metal bumper so it was sticking out pretty far. This felt a little weird so I ended up taking it down to about half of that, still felt a little weird so I did just a smidge less and now it feels pretty good. I think.

For that line pressure gauge, is that something that you could just buy and use? Or is that like a whole ordeal of a machine?

 

[Bad Luck]

Hey guys thanks for the replies, sorry for the delay Christmas was pretty crazy.. .

So I tried setting it to where the end of the metal stopper was equal with the end of the rubber grommet, but as in the right side of the metal bumper so it was sticking out pretty far. This felt a little weird so I ended up taking it down to about half of that, still felt a little weird so I did just a smidge less and now it feels pretty good. I think.

For that line pressure gauge, is that something that you could just buy and use? Or is that like a whole ordeal of a machine?

I believe it’s a special Toyota tool. I’m sure you could figure out equivalent parts, but it may be just as easy to find the correct Toyota tool online used. I’ll try to look to the tool number when I get back to work on Tuesday.

 

[octanejunkie]

You would have to talk to a Toyota transmission tech, or get the values out of the FSM, but the correct way to adjust the TV cable is to get the correct pressure readings at various shift points after making adjustments to the cable. Line pressured idle is only one measurement, and it's not the most critical.

I went through this when I installed a 700r4 transmission in my Chevy pickup and had to get the correct line pressure via adjusting tension on the cable with a pressure gauge installed at the correct port on the transmission.

I would not attempt to do this without knowing what I was doing, but that being said, having had the experience of doing this from scratch once before I did take about an 1/8 inch of slack out of the TV cable on my '99 4Runner. I haven't noticed any difference in performance, fluid quality, or fuel economy. I returned the cable to the position that I originally found it.

Unless you are experiencing problems with shifting in both normal and ECT mode I would leave the TV cable alone. There are other aspects of an electronic controlled transmission that don't rely on line pressure or cable tension.

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[jross20]

You would have to talk to a Toyota transmission tech, or get the values out of the FSM, but the correct way to adjust the TV cable is to get the correct pressure readings at various shift points after making adjustments to the cable. Line pressured idle is only one measurement, and it's not the most critical.

I went through this when I installed a 700r4 transmission in my Chevy pickup and had to get the correct line pressure via adjusting tension on the cable with a pressure gauge installed at the correct port on the transmission.

I would not attempt to do this without knowing what I was doing, but that being said, having had the experience of doing this from scratch once before I did take about an 1/8 inch of slack out of the TV cable on my '99 4Runner. I haven't noticed any difference in performance, fluid quality, or fuel economy. I returned the cable to the position that I originally found it.

Unless you are experiencing problems with shifting in both normal and ECT mode I would leave the TV cable alone. There are other aspects of an electronic controlled transmission that don't rely on line pressure or cable tension.

Sent from my Pixel 4 XL using Tapatalk

Well where I have it set now feels good and doesn't cause anything weird. So I guess it's okay maybe

You know it's weird, I guess in the past nobody really put a lot of thought into it because I saw plenty of posts where people were talking about just zip tying it at the highest setting lol

 

[brillo_76]

I just adjusted mine till it kick down properly when I floored it. Called it a day. Before adjustment I wouldn't downshift when it was floored.

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