kinglt-1

iTrader: (26)

There is no issue with the 8l90 itself. There is however issues with converter shudder and that is do to the stock tuning. There are TCC slip tables for each gear where the TCM will slip upwards of 10% in lockup. Garbage for sure. Once you disable it, turn off AFM, then set TCC to not lock until 8th gear part throttle, it is a solid unit and shifts great. Oh and gots to get rid of the TM. 3-4 tenths reduction just in trans tuning on the 8l90.

RedFuryZ28

Good info!

UltraZLS1

iTrader: (13)

I’m scared to run no TM all the time. My street tune is the same as my track tune besides TM.

Opinions vary.... do you think it will reduce tranny life having it off all the time ?

Blown383LS1

iTrader: (23)

Oh sorry. I must have mistaken you for the guy that tells everyone that you've been to more tracks than anyone here.

islander033

I know a C7Z that's on it's 4th or 5th 8L90 now. First trans blew up on stock toon/power. GM refused to warranty once they found out it had been tracked (road course and strip) a good amount.

Then last year the diff blew out of it, dealership said warranty no probs. The work was completed and GM said hell no. lol

Nick.H

Fucken jarred lmao

Nick.H

What about people who want a time slip or can't afford to go to jail because of their career family etc

HCI2000SS

iTrader: (2)

Looks like these guys are still at it, but this time a M6 in the 5.0

UltraZLS1

iTrader: (13)

That’s an older S550. Headlights slant back

But yeah that guy is racing his *** off with his new 6g lol

HCI2000SS

iTrader: (2)

Yep you're right I totally missed that. I just assumed it since his last 8 races were with the newer one lol

BlkMach1

JAke thinking he’d be close to a moonboostbro. Lol

kinglt-1

iTrader: (26)

Honestly no I don't. I mean I don't beat on mine all the time and if anything firmer crisp shifts will help the trans last. The slipping is what eats up the clutches. I am still on the stock 4l60e in my 4th gen. It's had a stall in front of it for 7yrs and H/C/I for over 3 seasons now....still going strong with 7200rpm shifts. No TM, manual shift kit, and cooler with proper tuning. I don't get any 2-3 flare shifts which kills them fast.

UltraZLS1

iTrader: (13)

I’m gonna have to look over my tune and see if he’s made some of those changes. I know AFM is off

Thanks

Poppacapp

I would not run on the street without torque management in the trans. At least track setup wise... Not recommended for the street driving, downshifting etc.

I have a completely separate track trans tune I load at the track

Poppacapp

Actually lately I have been running 100% stock trans tune on the street while sorting some tune issues and datalogging. Looks like some driver demand.tq cooefficient tweaking is in order.

Poppacapp

Surprising, because I have been told that GM honors the factory warranty if you do road course and track racing. As long as you don't modify anything. Track racing is what the car was built form and GM even pays half the cost of a 2 day Course at Ron Fellows School in Nevada. I plan to go in the spring. Fun Fun

BlkMach1

P1X 2018 GT made some tooning tweaks and just went 10.8 at 135.

RedFuryZ28

Why such a shitty ET?

BlkMach1

Still tuning. Only a 1.76 60ft. But not like you know what it takes to go 10s.

RedFuryZ28

Id drag that moon boosted buttdart down the street.