[JSH]

Has anyone done an A10 87A TCM 1st gear delete in Auto? Mine is deleted in Manual only. I'll also ask on HPT board.

[jlaudio11]

I’ll look at my tune to see how it would be possible. Can I ask why or what you are trying to achieve?

[JSH]

Originally Posted by jlaudio11

I’ll look at my tune to see how it would be possible. Can I ask why or what you are trying to achieve?

It's complicated. I need first gear delete at the strip and currently have to use manual mode to do that, but I can't or haven't found a way to get the car to shift at 6500 in manual mode unless I shift it manually, which I'm willing to do.

On the other hand, in auto mode, the TCM is tuned to shift at my commanded levels 63-6500, but I don't have first gear delete.

My peak horsepower is in the 6200/6300 range, so I want the car to make the shifts at 6400/ 6500 peak. This will also reduce the blower max rpm by 2,000 and reduce heat. HPE's 850 version was a high-rpm hp motor, but this one's not.

[jlaudio11]

If you raise all your speed shift points beyond and just change the shift rpm in tutd it should referrence that. Granted mine doesn’t make that till 3rd & 4th right now. In theory it should work but I will look and see what could get what you want
Edit why not just copy your shift speeds from auto to tutd? Are you doing this tuning or communicating it to a tuner?

[JSH]

Originally Posted by jlaudio11

If you raise all your speed shift points beyond and just change the shift rpm in tutd it should referrence that. Granted mine doesn’t make that till 3rd & 4th right now. In theory it should work but I will look and see what could get what you want
Edit why not just copy your shift speeds from auto to tutd? Are you doing this tuning or communicating it to a tuner?

I haven't edited the tcm

[cjperformance]

Originally Posted by jlaudio11

Why not just copy your shift speeds from auto to tutd

In a nutshell, this is what i think you need to do. The only reason TUTD doesnt upshift stock is that is set to shift way above the redline/cutoff.

Then you just put it in manual mode and push the stick forward to start in second, then it'll upshift normally without moving the stick.

[Joshinator99]

Originally Posted by cjperformance

In a nutshell, this is what i think you need to do. The only reason TUTD doesnt upshift stock is that is set to shift way above the redline/cutoff.

Then you just put it in manual mode and push the stick forward to start in second, then it'll upshift normally without moving the stick.

Yeah that is what I do at the strip. Stage the car, tap up into 2nd, then launch and let the trans auto shift the rest of the way.

[JSH]

Originally Posted by cjperformance

In a nutshell, this is what i think you need to do. The only reason TUTD doesnt upshift stock is that is set to shift way above the redline/cutoff.

Then you just put it in manual mode and push the stick forward to start in second, then it'll upshift normally without moving the stick.

Originally Posted by Joshinator99

Yeah that is what I do at the strip. Stage the car, tap up into 2nd, then launch and let the trans auto shift the rest of the way.

At a dead stop, with the trans in auto, it's effectively in 1st gear. I cannot upshift into 2nd in auto at a dead stop. This is the function I need.

When I then pull the shift lever to the left into manual, it can't see 1st gear and is in 2nd gear. It will shift automatically at wot. This how I made my five passes, but it shifts at 7000 rather than the 6500 I need.

So another question is, can the T87A be programmed to shift at 6500 in manual. This one has never done that. This is the function I need.

[radz28]

I thought I read our trannys (original T93-cars) have to be in 2nd when rolling into pre-stage/staging. I know my T87A won't shift into 2nd from a stop, even with the prescribed changes to the TCM...

[radz28]

I wonder if the T93-flashes can do it.

[JSH]

Originally Posted by radz28

I thought I read our trannys (original T93-cars) have to be in 2nd when rolling into pre-stage/staging. I know my T87A won't shift into 2nd from a stop, even with the prescribed changes to the TCM...

I switched to the T87A when they became editable and the T93 wasn't. Of course I then sold my T93 which is now editable. I have posted these questions at HPT Forum and emailed them too.

All I really need is a way to get my T87a to shift consistently at say 6500, whereas it now shifts at 6900-7000, at the strip. Otherwise, I'll shift it manually.

[radz28]

Originally Posted by JSH

I switched to the T87A when they became editable and the T93 wasn't. Of course I then sold my T93 which is now editable. I have posted these questions at HPT Forum and emailed them too.

All I really need is a way to get my T87a to shift consistently at say 6500, whereas it now shifts at 6900-7000, at the strip. Otherwise, I'll shift it manually.

I switched, to the T87a, too. Even though I've seen King's post about TUTD, and believe I understand it, I have not yet implemented it in the TCM yet. BUT - I know that I can force a 2nd Gear start the way I stated above. I haven't sent my T93 in yet, but will eventually, so I can't speak to that yet.

Are you having this problem in any gear, or in a specific one? I'm probably already stating something you already know, but on the lower gears, especially with as much power as you're making, I've read it is sometimes necessary to lower the shift speed because the TCM/tranny needs to start the shift process sooner. This was more of an issue in the 1-2 shift, if I recall (maybe even 2-3, in a case like yours, because of your build). Could it, also, be a possibility your tranny is just not up to this task, at this power level? Are you commanding enough pressure? I thought these were only reliable until up to about where you are...

[JSH]

Originally Posted by radz28

I switched, to the T87a, too. Even though I've seen King's post about TUTD, and believe I understand it, I have not yet implemented it in the TCM yet. BUT - I know that I can force a 2nd Gear start the way I stated above. I haven't sent my T93 in yet, but will eventually, so I can't speak to that yet.

Are you having this problem in any gear, or in a specific one? I'm probably already stating something you already know, but on the lower gears, especially with as much power as you're making, I've read it is sometimes necessary to lower the shift speed because the TCM/tranny needs to start the shift process sooner. This was more of an issue in the 1-2 shift, if I recall (maybe even 2-3, in a case like yours, because of your build). Could it, also, be a possibility your tranny is just not up to this task, at this power level? Are you commanding enough pressure? I thought these were only reliable until up to about where you are...

My T87A has first gear delete now in Manual mode but I can't set lower shift points. I do not have first gear delete in Auto, but I can set lower shift points. LOL, so I need either lower shift points in manual or first gear delete in Auto. This has to be doable.

My trans has no other issues.

[grampa_ss]

Attachment 1133218

Originally Posted by JSH

My T87A has first gear delete now in Manual mode. I do not have first gear delete in Auto but I can set lower shift points. LOL, so I need either lower shift points in manual or first gear delete in Auto. This has to be doable.

My trans has no other issues.

These should be the tables you need to edit. I downloaded a stock 2017 Zl1 file from hptuners. the tables look like the A8...so, in theory these tables should be the ones you need to modify. I can tell these are way way too high a mph to shift at 6500. You'll hit the limiter with these stock settings.