4L60e Help With Torque Management

[hansknapp1]

I have:

Rebuild 4L60E
Alto High Performance Clutch Pack
Full Transgo HD2 shift kit installed (installed springs for comfy ride)
And Corvette Servo

Car shifts fine but there is approx 15% Throttle - 50% i think a bang noise.
Not loud, also a little bit in 1st.

I think it has to do something with torque management in the trans, can someone help?
Raising or Lowering? What values?

I like the trans to be a high life expectancy, just my regular daily driver with kids.
Thx for sorting this out.

This is my tune.
(only adapted shift points) all the other stuff was left untouched. I like to eliminate the bang in 1st and 2nd with low to medium throttle. (haven't tested out high throttle since everything is new)

Chevrolet Avalanche Tune Definitive 15 - Enable Cold Low RPM Shift 1st.hpt

thx !!

[RDF1]

What all did you do when installing the HD2?
What size holes in the separator plate and what torque converter?

[hansknapp1]

What all did you do when installing the HD2?
What size holes in the separator plate and what torque converter?

Hello,

I test drove today: It is less to almost not noticable in 1st -> 2nd.
But from 2nd -> 3th upshift it really bangs.
3th -> 4th is also fine.

Thx for perfectionize my family car

I used GM GENUINE 17803851 Remanufactured Torque converter.

The holes drilled in separator plate:
.093 all holes except:
.082 for 1-2 shift which should relate to Short shift (because of Corvette Servo) (.093 = Full Race & Hi-Stall conv. mentioned in Transgo manual)
.082 for 2-3 shift which should be ok (because a Hi-stall conv = .093 and Full race = .101 mentioned in TransGo's manual.)

I forgot to mention one thing: The TCC Apply/Release Speed vs. TPS vs. Gear tables i also changed from stock to no lock in 2nd, 3th and 4th (near end) as recommended
Torque Converter Apply Release.png

Reference image:
https://www.ls1gto.com/threads/how-t...w-pics.356667/

As for what i did Transgo HD2 shift kit:
So installed the vette servo
Band adjustment was fine in limits like stock (reused old pin and no shims) to match up
2nd accumulator has 1 spacer which should be just a firm and easy shift 1-2nd
The accumulator spring used in valvebody: softer spring
for the clutch spring retainers and FWD coast spring retainers: installed everything for under5500 rpm (because this truck does not have to rev past that as it is a family car)

[hansknapp1]

the tune mentioned above (1st post) is the ony i'm currently using.
Thanks for helping me out

[hansknapp1]

update to myself and maybe others;

Still had a slight clunking noise from 2nd to 3th gear (famous GM clunking?)
I drove 1000kms the past month and now been playing to get this fixed.

Slightly increasing shift points helped, and then increasing torque management by 5% over the complete 2nd gear and adding another 5% somewere half way to increase even more.
So you have 10% tm increase in the first half of 2nd gear, and 5% increase the second half of 2nd gear.

Shift timing 2nd gear down 5% and NO clunking, everything is butter smooth