4l60e 2-3 slipping shift

[delcowizzid]

4l80e is pretty much a t400 with overdrive and electronic control so far seen a few stock ones at 500rwkw not even sweating hahaha

[vscapricetim]

Well that would be nice wouldn't it....

[vscapricetim]

Well, we've had a win!!!

I swapped the dex6 to Penrite dex3.

Made normal, performance and manual tables the same for both the shift points (matching the kickdown tables) and desired shift times.

2-3 shift now is back to how it should be!!! Played with the shift klm/hr and now shifts 1-2 and 2-3 at about 5300rpm each time. I did about 6 runs at wot and shifts were consistent, so I didn't try manually shifting 1-2-3.

Thanks everyone for your help

[immortality]

Nice. Glad it worked out.

[Deuce]

Well, we've had a win!!!

I swapped the dex6 to Penrite dex3.

Made normal, performance and manual tables the same for both the shift points (matching the kickdown tables) and desired shift times.

2-3 shift now is back to how it should be!!! Played with the shift klm/hr and now shifts 1-2 and 2-3 at about 5300rpm each time. I did about 6 runs at wot and shifts were consistent, so I didn't try manually shifting 1-2-3.

Thanks everyone for your help

Great to hear mate. Well done.

[Wade]

Awesome better than expensive repairs. These are a sensitive little thing. Not the right amount of fluid or type and they leave the chat

[Wade]

Makes you wonder why Holden only ever used the 60 in our cars. Probably saved $1 and got through warranty. But I remember having issues with 60’s even when they were relatively new back in the day. Pretty sure I seen documentation pretty much saying our pcm’s were meant for the 80. There’s even a flag or scaler for fwd trans in the vx-vy pcm. Which doesn’t surprise me as it’s all us based. Pretty sure the vn v6 was out of a fwd platform, that’s why the thermostat was where it was, and then Holden changed it after?

[immortality]

Yup, a lot of the Buick platforms were FWD.

[vscapricetim]

So, I finally got the car out to the drags last night.

Now I have a shifting issue. I had the shifter in 2nd to do the burnout letting it shift 1-2, all good. Off the start line I had the shifter in 3rd, it hit the limiter in 1st and shifted pretty much straight to 3rd and must have been in trans limp mode as when I pulled up it was stuck in 3rd. Turn car off and on and it reset. Did this twice with the same result.

On the street the week before it didn't happen.

Ran a 13.05@107mph

Any thoughts??

[immortality]

Did you try it just in Drive at all like you did out on the street?

Test it on the street in Drive and then in manual 3rd and see what it does.