8L90 Manual mode tuning(TUTD) - Page 2

kgf · 01-05-2020, 02:24 PM

Quote:

Originally Posted by grampa_ss

Yep....You need to command the shift early, especially in 1st gear. At WOT, I command the shift at 33 mph, but it actually shifts at about I dunno 36-37mph not really sure, but the RPMs are around 6700-6800.

Use MPH to set your shift points, not RPMs. And command it before you actually want it to shift at. The shifting looks at MPH first. Example..you said you have your 2>3 shift at 60mph and 6200 rpms...and you saw it rev to 6700. that 6200 meant nothing.

Thanks, that all makes sense now that you explained it. Was worrying about the RPMs for nothing.

Makes me wonder why GM wouldn't program the manual mode like this from the factory. Seems like it would be better than forgetting you are in manual mode and not shifting. Seems like it would be easier on the motor.

grampa_ss · 01-05-2020, 03:14 PM

Quote:

Originally Posted by kgf

Thanks, that all makes sense now that you explained it. Was worrying about the RPMs for nothing.

Makes me wonder why GM wouldn't program the manual mode like this from the factory. Seems like it would be better than forgetting you are in manual mode and not shifting. Seems like it would be easier on the motor.

I agree. The stock setting bounce you off the limiter. Pretty dumb.

TheRealJA105 · 01-06-2020, 09:43 AM

Quote:

Originally Posted by kgf

Thanks, that all makes sense now that you explained it. Was worrying about the RPMs for nothing.

Makes me wonder why GM wouldn't program the manual mode like this from the factory. Seems like it would be better than forgetting you are in manual mode and not shifting. Seems like it would be easier on the motor.

Quote:

Originally Posted by grampa_ss

I agree. The stock setting bounce you off the limiter. Pretty dumb.

Because it is an actual manual mode that way. You guys have turned it into max performance auto mode.

Bangkok_ZL1 · 11-15-2020, 04:25 AM

This is Beautiful. Especially since I'm a little older (forgetful). And my new 2019 has no warranty whatsoever from GM. I think I need to have a diligent listening ear with some of you to get advice what you would do all over again if you had a new ZL1 with no warranty.... I will say that the company I bought the ZL1 from is giving me a 1 year warranty on them. So I won't make too many obvious mods from the get go. But after a year when I know the car is solid. I want to bring in a few (hundred) more horses.

JSH · 12-16-2020, 02:32 PM

Has anyone figured out how to make these TUTD edits to the T93 TCM?

*Joshinator99* · 12-16-2020, 03:16 PM

Quote:

Originally Posted by JSH

Has anyone figured out how to make these TUTD edits to the T93 TCM?

That TCM is currently unsupported by HP Tuners, so no way to flash it until they do.

jasonz28camaro · 07-01-2021, 07:42 PM

Any of you do any tuning with the truck OS? I have TUTD working on my 68 but it won’t tapshift at WOT using this method or manually shifting, shifts immediately and fine at part throttle. The reason I mention the truck OS is because when I’m in L gear to access the TUTD mode (different from cars) hptuners says my driving mode is in “normal” mode, not TUTD. With mine being a swap project I could be an oddball, I’ll need to do some testing on my wife’s Tahoe to see what hptuners says for driving mode when I use her TUTD. Either way just wondering if anyone has successfully figured this out for trucks. I’ve checked some truck forums and such with no luck.

Red Lightening · 06-09-2022, 12:02 PM

Have you had any issues with burnouts? Mine is jumping from 2nd to 3rd, then "D" drive, then neutral all in just a couple of seconds or less, (on its own)? Impossible to do a proper burnout. Launches and shifts down the track well. I know its been a while since this post, but any thoughts?

JSH · 06-09-2022, 01:20 PM

Quote:

Originally Posted by Red Lightening

Have you had any issues with burnouts? Mine is jumping from 2nd to 3rd, then "D" drive, then neutral all in just a couple of seconds or less, (on its own)? Impossible to do a proper burnout. Launches and shifts down the track well. I know its been a while since this post, but any thoughts?

We've solved the T87a/A10 (2020+) tuning issues and can launch in first or second gear, and it shifts at set shift points automatically while in Manual. The car is faster with 1st gear launch. I drive thru the box and burnout in 2nd at around 5k rpm. No jumping from gear to gear. All runs have been with nannies off, but I'm going to leave nannies on next trip.

KingLT1 · 06-10-2022, 07:52 AM

Quote:

Originally Posted by Red Lightening

Have you had any issues with burnouts? Mine is jumping from 2nd to 3rd, then "D" drive, then neutral all in just a couple of seconds or less, (on its own)? Impossible to do a proper burnout. Launches and shifts down the track well. I know its been a while since this post, but any thoughts?

No issues...The problem sounds like your foot is too heavy. You don't just floor it to do a burn out. If you are going to do a second gear burn out then you need to modulate the throttle to keep it under the commanded shift MPH.

JSH · 06-10-2022, 08:15 AM

Quote:

Originally Posted by Red Lightening

Have you had any issues with burnouts? Mine is jumping from 2nd to 3rd, then "D" drive, then neutral all in just a couple of seconds or less, (on its own)? Impossible to do a proper burnout. Launches and shifts down the track well. I know its been a while since this post, but any thoughts?

Put in manual, pull up your HUD, give it a little throttle in 1st to start tires spinning, shift to 2nd, spin them for 3 or 4 seconds at ~5k, let off and roll forward.

KingLT1 · 06-10-2022, 02:42 PM

No you don't shift during a burnout with these transmissions. It's hard on them.

ZL1Atlanta · 06-10-2022, 02:52 PM

Quote:

Originally Posted by KingLT1

No you don't shift during a burnout with these transmissions. It's hard on them.

It is fine if you shift at a lower RPM. It's when you take it up to 6K+ and then shift during a burnout that really beats on them. I start in second, take it up just enough to get the tires turning, and then go to third to finish the burnout. It takes WAY too long to get a proper burnout in second gear.

JSH · 06-10-2022, 08:15 PM

Quote:

Originally Posted by ZL1Atlanta

It is fine if you shift at a lower RPM. It's when you take it up to 6K+ and then shift during a burnout that really beats on them. I start in second, take it up just enough to get the tires turning, and then go to third to finish the burnout. It takes WAY too long to get a proper burnout in second gear.

Yea, I can see starting in 2nd and quickly shifting to 3rd.

12-16-2020, 02:32 PM	#19
JSH Drives: '20 ZLE Join Date: Jun 2020 Location: Mile High Posts: 4,195	Has anyone figured out how to make these TUTD edits to the T93 TCM? __________________ 2020 ZL1LE A10. LME LT4 390 short block, LME CID Heads, Kong E2650, FBO. 15" conversion, MT ET Street R 325/15. 100 octane: 1045hp/1055tq. 100 octane + Meth (1x10+): 1117 hp/1067 tq

07-01-2021, 07:42 PM	#21
jasonz28camaro Drives: 2007.5 Duramax Join Date: Nov 2016 Location: Houston Posts: 101	Any of you do any tuning with the truck OS? I have TUTD working on my 68 but it won’t tapshift at WOT using this method or manually shifting, shifts immediately and fine at part throttle. The reason I mention the truck OS is because when I’m in L gear to access the TUTD mode (different from cars) hptuners says my driving mode is in “normal” mode, not TUTD. With mine being a swap project I could be an oddball, I’ll need to do some testing on my wife’s Tahoe to see what hptuners says for driving mode when I use her TUTD. Either way just wondering if anyone has successfully figured this out for trucks. I’ve checked some truck forums and such with no luck. __________________ Built C6Z 600whp NA - SOLD Built LSX 96SS - SOLD 68 Camaro - 6.2/10l80, self built and tuned.

06-09-2022, 12:02 PM	#22
Red Lightening Drives: 2016 SS Camaro Convertible Join Date: Nov 2018 Location: CO Posts: 19	8l90 Manual Mode tuning, burnouts Have you had any issues with burnouts? Mine is jumping from 2nd to 3rd, then "D" drive, then neutral all in just a couple of seconds or less, (on its own)? Impossible to do a proper burnout. Launches and shifts down the track well. I know its been a while since this post, but any thoughts?

06-10-2022, 02:42 PM	#26
KingLT1 Drives: 2016 1SS NFG A8 Join Date: Aug 2017 Location: 46804 Posts: 7,665	No you don't shift during a burnout with these transmissions. It's hard on them. __________________ 2016 NFG SS A8/Whipple 2.9/Fuel System/Flex Fuel

11-15-2020, 04:25 AM	#18
Bangkok_ZL1 Flying around Thailand Drives: 2019 Camaro ZL1 Join Date: Oct 2020 Location: Bangkok, Thailand Posts: 620	This is Beautiful. Especially since I'm a little older (forgetful). And my new 2019 has no warranty whatsoever from GM. I think I need to have a diligent listening ear with some of you to get advice what you would do all over again if you had a new ZL1 with no warranty.... I will say that the company I bought the ZL1 from is giving me a 1 year warranty on them. So I won't make too many obvious mods from the get go. But after a year when I know the car is solid. I want to bring in a few (hundred) more horses.

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