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8-Speed and Blackbear Tuning Impressions?

Bayou-AllTerrain

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Bayou-AllTerrain Enthusiast

Bayou-AllTerrain

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Any update on this?

 

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This is what I got back from BB. Haven't decided what I want to do yet.

 

Hi Paul,

 

You are having to use less throttle for the same rate of acceleration, which is resulting in an earlier upshift. We can dial back the response at light throttle a bit for you to help that out if you would like. There is no transmission tuning available on that model, you are still running the OEM shift points as a result.

 

Justin

 

 

 

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huntr1117 Enthusiast

huntr1117

Posted
Posted

This is what I got back from BB. Haven't decided what I want to do yet.

 

Hi Paul,

 

You are having to use less throttle for the same rate of acceleration, which is resulting in an earlier upshift. We can dial back the response at light throttle a bit for you to help that out if you would like. There is no transmission tuning available on that model, you are still running the OEM shift points as a result.

 

Justin

 

 

 

Sent from my iPhone using Tapatalk

I know that bringing a tuned truck to a dealer might not be the best idea but could a transmission service fast learn procedure possibly help? I know they are supposed to do this after any new updates are added to the tcm programming.

 

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Abearclaw Enthusiast

Abearclaw

Posted
Posted

Sounds like you need to drive it more!! Like DRIVE It haha. In all seriousness tho that just sounds like you need to hold off till they figure out the tuning with that transmission

 

 

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  • 11 months later...
The Gibson Enthusiast

The Gibson

Posted
Posted
On 4/25/2017 at 7:00 PM, Bayou-AllTerrain said:

This is what I got back from BB. Haven't decided what I want to do yet.

 

Hi Paul,

 

You are having to use less throttle for the same rate of acceleration, which is resulting in an earlier upshift. We can dial back the response at light throttle a bit for you to help that out if you would like. There is no transmission tuning available on that model, you are still running the OEM shift points as a result.

 

Justin

 

 

 

Sent from my iPhone using Tapatalk

 

How did it go?  I was wondering if I had enough time to get the tuner and files for a road trip (towing) in two weeks.

Mileguru Enthusiast

Mileguru

Posted
Posted

A 2017 with a 6.2L and 8-speed can TECHNICALLY have the TCM tuned without using HPTuners. This is done by swapping your current TCM with an older one. You can get a 2015-2016 TCM and Black Bear will tune it for you. I don't think they have any TCMs left to buy though, so you gotta find one on your own. Here's some info from a post I made in another thread.

 

http://www.gm-trucks.com/forums/topic/157013-what-have-you-done-to-your-k2-today/?do=findComment&comment=2105247

 

Crobinson16 Enthusiast

Crobinson16

Posted
Posted
On 4/26/2017 at 12:28 AM, huntr1117 said:

I know that bringing a tuned truck to a dealer might not be the best idea but could a transmission service fast learn procedure possibly help? I know they are supposed to do this after any new updates are added to the tcm programming.

 

Sent from my SAMSUNG-SM-G920A using Tapatalk

I just had my 18 6.2 at the dealership for a TCM program update it was for improved shifting, they did not do a " fast learn " on the trans. I don't know if they are supposed to that after a reprogram or not. I'd like to find something that says they should. A fast learn only corrects clutch fill times I don't believe it has anything to do with shift points or tq converter lock up. 

Crobinson16 Enthusiast

Crobinson16

Posted
Posted

Actually I just read one of the bulletins, and it does say that if a TCM is reprogrammed, a service fast learn is required. So I'm going to call them tomorrow and see what they say.

Crobinson16 Enthusiast

Crobinson16

Posted
Posted

I just thought of something and perhaps Justin will chime in, think about this, is the fast learn something that needs done? When someone tunes there truck through any of the tunners. We don't do a service fast learn from the dealer. I know the don't tune the 17+ 8sps but some of them have tuned the 14-16 8spds and I don't think they tell you to take it back to the dealer for a service fast learn. Just something I thought about. 

Crobinson16 Enthusiast

Crobinson16

Posted
Posted

Took the truck back in to the dealership to have the transmission service fast learn completed after having the updated TCM calibration for improved shifting. I can say for a fact that the truck drives and shifts better after having the service fast learn done. They were infact to do the fast learn after doing the updated TCM calibration it didn't get done on Friday , but they did it for me this morning while I waited. I'm glad I took it back to have it done. Also before I took it in this morning , I looked to see if there were any ecm calibration updates. They were two showing that may be available. They hooked it up and they were so they updated the ecm calibrations as well. My fuel mileage is back to where it was prior to the TCM calibration. So either the fast learn or the ecm calibrations or a combination of the two have deffentaly made a difference in how the truck preforms. I recommend anyone to check in TIS WEB or with there dealer to see if any updates may be available. They don't cost anything if you are still under warranty. And if you are not i feel it's still beneficial for the shop rate which should only be a one hr charge at the most. 

 

Thank you Justin for providing the information and link to check out. I wasn't aware this was available.

acc412 Enthusiast

acc412

Posted
Posted
On 4/17/2018 at 5:27 PM, Crobinson16 said:

Actually I just read one of the bulletins, and it does say that if a TCM is reprogrammed, a service fast learn is required. So I'm going to call them tomorrow and see what they say.

Anyone know how to do this?

Crobinson16 Enthusiast

Crobinson16

Posted
Posted
22 hours ago, acc412 said:

Anyone know how to do this?

For the service fast learn it needs to be done at the dealership on there gds2. I believe that's what gm calls there system now. There are however individual clutch learn process that can be done on your own . The process varys from certain years. It's a pretty lengthy process of varying driving conditions , gear selections, rpms and mph. I don't have a link for it but Google 8l90 flast learn or clutch learn and you should find some information.

  • 9 months later...
Jdub289f Enthusiast

Jdub289f

Posted
Posted

Bringing this back. I have a 2018 5.3L 8 speed. Has anybody else had any experiences being that we can only tune the engine in these? I’m actually not too bummed out on the shifting, I just want a nice predictable feel in the throttle with a little extra get up and not so much lag. 

  • 1 month later...

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