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6L80e tq converter going out, any info on aftermarket converters?

00pooterSS

By 00pooterSS
in Engines & Drivetrain

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00pooterSS Enthusiast

00pooterSS

Posted
Posted

I've read/heard a couple of things about people saying they had trouble with aftermarket converters but when I ask them what they didn't like, what brand, what problems.....I get ghosted. 

 

I have been considering doing a 3000-3200 stall anyway but now it looks like I'll have to replace it if changing the fluid doesn't help stop the shudder. (I've had this work many times in the past so it's where I will start)

 

I've had stalls in the past, I'm just really needing any helpful info on what people have tried and what they did and did not like stalling one of these trucks with the 6L80

 

Thank you all in advance for any help. 

flyingfool Senior Enthusiast

flyingfool

Posted
Posted (edited)

camaro zl1 is $350 2200-2500 stall

 

i think circD is close to $900

Edited by flyingfool
  • 1 month later...
  • 2 weeks later...
lucas287 Enthusiast

lucas287

Posted
Posted

Stall speed is highly dependent on input torque. What stalls to 2200-2500 on a ZL1 that has 650 lb ft of tq wouldn't stall anywhere near that behind an NA L83. 

 

Just warning you that it might be difficult to control any aftermarket converter with the limited access to the GM TCM algorithms. Read through this thread over on HPT: https://forum.hptuners.com/showthread.php?65233-6l80-TCC-LINE-PRESSURE-ISSUE-CIRCLE-D-3000-HP

M1ck3y Senior Enthusiast

M1ck3y

Posted
Posted
On 11/24/2020 at 3:55 PM, lucas287 said:

Stall speed is highly dependent on input torque. What stalls to 2200-2500 on a ZL1 that has 650 lb ft of tq wouldn't stall anywhere near that behind an NA L83. 

 

Just warning you that it might be difficult to control any aftermarket converter with the limited access to the GM TCM algorithms. Read through this thread over on HPT: https://forum.hptuners.com/showthread.php?65233-6l80-TCC-LINE-PRESSURE-ISSUE-CIRCLE-D-3000-HP

I think constantly pulse like that stock? 

 

I know on my truck right before I had the trans flush done the pulse was audible and followed the rise and fall of the rpm fluctuations. Now, maybe 5000 kms after the flush the truck is still smoothish with no rpm fluctuations, but the I'm definitely getting a constant up and down exhaust note in some situations. 

 

I was considering dropping the 1500 cdn and getting a tune that included the trans. But now it sounds like with hp tuners you can't really correct this?

peejaykay Enthusiast

peejaykay

Posted
Posted
On 10/2/2020 at 12:20 PM, flyingfool said:

camaro zl1 is $350 2200-2500 stall

 

i think circD is close to $900

I'm running  the cts-v tq converter on a built 6L80. Feels almost stock. Feels kinda sluggish at low speeds, especially when cold. Shifts are crisper. Didn't even need a trans tune. No codes. Since I just crested 100k miles, going to start massing parts for a top end rebuild (cam, heads, L86 IM/TB). 

  • Like 1
flyingfool Senior Enthusiast

flyingfool

Posted
Posted (edited)

isn't the CTS-V and ZL1 the same?   Good to know it works without a tune, i'm sure it will get better with corrected programming. i would down load the zl1 or cts trans file and  anylize the stock parameters and  compare that to your trucks file.  and try and mimic GM's tune for that set up

keep an eye on your trans temp. where does it run after the swap?

Edited by flyingfool
peejaykay Enthusiast

peejaykay

Posted
Posted

There was a specific reason the CTS-V from a specific year group was recommended over the ZL-1. I believe their stalls are identical, had something to do with mounting. I don't recall the details. Shop that did the work on trans and converter (my converter failed at 80k, all stock setup but I towed a heavy trailer often) has a world record holding C7 so I'm gonna go with their recommendation.

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