Bone stock 5.3L LM7, 3.42 gears, 4L80e + Circle D Stall, how should it feel?
Jun 24, 2015 | 10:18 PM
#11
I cringe at the thought of a 5.3 pulling a stalled 4l80 with 3.42s. For all intents and purposes, how it feels now is how its going to feel with the turbo on unless you get into boost. But for putzing around without getting into boost, should feel similar off idle.
Also, which level of converter do you have? (1b, 2b, 3b, etc?). I've got the 2b and it's off, too loose but I've been too lazy to pull it for a restall.
Also, which level of converter do you have? (1b, 2b, 3b, etc?). I've got the 2b and it's off, too loose but I've been too lazy to pull it for a restall.
4L80 LS Pro Series Stage II 258mm 2B
I suppose the only way to know if the converter feels right is to put boost behind it like I planned. I can't imagine that it would feel the same, but what do I know. What would be the disadvantage of running a tighter converter for a truck that admittedly is a 99% daily driver, I might go to the track once just to get a number.
Might feel bad with a 5.3, I really didn't notice much difference between my 4L60E and 4L80E behind my small cammed 350 in my Express that had 3.42s. I put a stock 3.73 geared 9.5" 14- bolt in after exploding the spiders in the 3.42 geared 10-bolt. TUNE can make a huge difference. When I had HP Tuners segment swap over the 4L80E all my stock torque management and torque reduction settings went back to stock.
Jun 25, 2015 | 10:29 AM
#12
I would error on the side of tighter rather than looser for a DD but that is just my personal preference. Some guys love driving a 4000 stall but I am not one of them, at least not as a DD. Remember too that as your power level increases this will only make the converter looser. If it is too loose for your tastes now it will be way too loose once you put the turbo on....
Jun 25, 2015 | 11:52 AM
#14
TECH Enthusiast
Joined: Oct 2006
Posts: 642
Likes: 21
From: Euless, TX
Some of the stock torque management settings really kill off the timing through the low-midrange. Once I fixed the tune, torque management crap, fixed the shift points and the TCC lockup, my 4L80E drives very nicely.
Jun 25, 2015 | 12:16 PM
#15
Any thing you can recommend I can safely fiddle with in HPT to try and improve things? Did you disable all torque management?
Jun 25, 2015 | 03:42 PM
#16
Ok guys so I searched for TM removal and I removed all TM, I also lowered shift times to .200 across the board. Hope this is safe.
The truck downshifts kinda slow, is there a separate table for downshift speeds?
The truck does feel just a little bit more responsive off idle, and it barks the tires on the 1-2 shift which it didn't do before. I did not touch the shift pressures or the Force Motor Current or any lockup settings. Does anyone have any recommendations for those?
The truck downshifts kinda slow, is there a separate table for downshift speeds?
The truck does feel just a little bit more responsive off idle, and it barks the tires on the 1-2 shift which it didn't do before. I did not touch the shift pressures or the Force Motor Current or any lockup settings. Does anyone have any recommendations for those?
Jun 25, 2015 | 05:16 PM
#17
TECH Enthusiast
Joined: Oct 2006
Posts: 642
Likes: 21
From: Euless, TX
Ok guys so I searched for TM removal and I removed all TM, I also lowered shift times to .200 across the board. Hope this is safe.
The truck downshifts kinda slow, is there a separate table for downshift speeds?
The truck does feel just a little bit more responsive off idle, and it barks the tires on the 1-2 shift which it didn't do before. I did not touch the shift pressures or the Force Motor Current or any lockup settings. Does anyone have any recommendations for those?
The truck downshifts kinda slow, is there a separate table for downshift speeds?
The truck does feel just a little bit more responsive off idle, and it barks the tires on the 1-2 shift which it didn't do before. I did not touch the shift pressures or the Force Motor Current or any lockup settings. Does anyone have any recommendations for those?
After
You can see the dramatic difference in timing and the 200 rpm higher brake stall from the extra torque output.
Jun 25, 2015 | 06:16 PM
#18
Looks like you did a good job. Basically the 80e is pretty lazy from the factory. Since it was intended for towing it wants to stay in high gear. A shift kit and tune usually fixes the laziness. Looks like you are on the right path.
Jun 26, 2015 | 02:15 PM
#19
Fast, those screenshots look like the basic changes to eliminate torque management, am I correct? I believe entering "640" achieves the same thing does it not?
Jun 26, 2015 | 02:48 PM
#20
TECH Enthusiast
Joined: Oct 2006
Posts: 642
Likes: 21
From: Euless, TX
Yea basically removes torque limiting. 640 should do the same thing. Make sure you bump up the output torque limits as well.