Shift points on the auto

**Firebirdjones** · 05-02-2007, 12:12 PM

I am trying to raise the shift point on the 1-2 shift and the car doesn't seem to respond.
I have moved the mph up in every catagory as much as 4 mph, yet the car still wants to shift at 5,800 rpms, once in a while it might touch 5,900 when I am logging. But it's not getting close to the 6000 rpm shift point the engine is set to.
It shifts on the 2-3 at 5950 or so,,,and it's set to 6,000 as well but I haven't touched any of the mph settings on the 2-3 shift, it's fine for now. But I would like to raise the 1-2 just a slight amount, What gives?

**LS1_TA_2002** · 05-02-2007, 01:05 PM

Are we talking WOT or normal cruising?

**Firebirdjones** · 05-02-2007, 03:06 PM

Just WOT, I am happy with part throttle stuff.

**LS1_TA_2002** · 05-03-2007, 12:25 AM

Just curious, what programmer/software are you using?

**Firebirdjones** · 05-03-2007, 03:52 AM

Using Hptuner. Rev limit is still set at the factory 6200 rpm setting. Shift points are set to 6,000 for both 1-2 and 2-3

But at full throttle it would shift 1-2 at about 5,800 and the 2-3 at 5,950.

So I was trying to raise the 1-2 shift point to get it around 6,000 and to also help out the huge rpm drop on the 1-2 shift that is a sore spot on the 4L60E's,,,,so I started bumping up the mph shift points on all the trans settings, cold, hot, performance etc....just on the 1-2 shift only. So far I have went up 4 mph on the 1-2 shift with no affect at all. Kinda strange. It's like it's getting it's info from another table I am not aware of. Larry.

**mrr23** · 05-03-2007, 04:33 AM

shift points are rpm and mph based. are you seeing the shift point through hptuners, or watching the dash tach. the dash is a little slow.

you may have to raise the rpm to say 6400, to get it to shift at 6000. jimmyblue is a guy to talk to about shifting.

**Firebirdjones** · 05-03-2007, 04:59 AM

I am logging it and watching through Hptuner.

I guess I need more cusion on the rpm setting? Then the MPH will dictate where it shifts? Kinda weird. Would be nice to use one or the other instead of trying to mix the two of them and find a happy spot. Makes it more difficult that way.

Is this what you have found to work for you?

**LS1_TA_2002** · 05-03-2007, 07:55 AM

Originally Posted by Firebirdjones

I guess I need more cushion on the rpm setting? Then the MPH will dictate where it shifts?

Yes, just remember to set you rev limiter accordingly.

Originally Posted by Firebirdjones

Kinda weird. Would be nice to use one or the other instead of trying to mix the two of them and find a happy spot. Makes it more difficult that way.

Think of it this way. If your at a dead stop at the bottom of a hill and you floor it your engine will have to work harder to get you going. So your speed may be lower when your tranny shifts than if you were stopped at the top of the same hill and floored heading down. Your tranny needs to be able to shift when appropriate.

**Firebirdjones** · 05-03-2007, 08:23 AM

Okay I am going to sneak up on it then. The rev limit is still set at a factory 6,200 rpms. I bumped up the rpm shift point from the factory 6,000 to 6,050 just to see if that does anything on the 1-2 shift. Hopefully that will start to get it closer to 6,000 rpms, since now it only shifts at 5,800 and sometimes 5,900 rpms.

**mrr23** · 05-03-2007, 11:04 AM

yep, shifting is another one of those more than one table affects it to work properly. to get mine to shift higher, i went 200 rpm and 3 mph over stock. set the rev limiter to 6500. never really logged it.

**Firebirdjones** · 05-03-2007, 12:40 PM

Cool thanks. I think I am getting a handle on it now,,,,much appreciated.

**mrr23** · 05-03-2007, 03:28 PM

good. you can write the visual guide for changing shift points

**Firebirdjones** · 05-03-2007, 05:01 PM

LOL, I am no expert but I am trying to learn. Anything I can do to help I am willing. I just can't wait for all this helpfull info you are working on. Cheers.

**mrr23** · 05-03-2007, 05:02 PM

i'm only doing the simple stuff, first. when i can learn the hard stuff, i'll be putting that up. have you seen the pages i've made so far?

**Firebirdjones** · 05-03-2007, 05:20 PM

No sir but I would love to check them out. Where can I find them.

**LS1_TA_2002** · 05-03-2007, 06:27 PM

Originally Posted by Firebirdjones

No sir but I would love to check them out. Where can I find them.

http://www.ls1.com/forums/showthread.php?t=49483

**Firebirdjones** · 05-04-2007, 02:51 AM

Very very nice. I like it so far. The pictures speak 1,000 words. Alot of people explain it but without the graph to see what they are talking about I sometimes get lost in the words. Great job.