4L60E shifting.

[97 Jimmy]

Hello all, I am setting up my trans for firmer shift points using the Normal Base Vs. TPS Vs. MPH, this is working well. Also zeroed Torque Management Spark Retard Limit Vs. RPM. My question is, can I increase the "TCC apply and release" firmness to better match my new shift firmness through the valve body? I was thinking this would be done with line pressure as the converter is using fluid to lock/unlock? If I increased the line pressure may be then I would decrease the TPS Vs. MPH table to match? Any tranny people out there? Thanks, Les>>>

[97K15004WD]

Originally Posted by 97 Jimmy

Hello all, I am setting up my trans for firmer shift points using the Normal Base Vs. TPS Vs. MPH, this is working well. Also zeroed Torque Management Spark Retard Limit Vs. RPM. My question is, can I increase the "TCC apply and release" firmness to better match my new shift firmness through the valve body? I was thinking this would be done with line pressure as the converter is using fluid to lock/unlock? If I increased the line pressure may be then I would decrease the TPS Vs. MPH table to match? Any tranny people out there? Thanks, Les>>>

Les: Change the ramp rates in the trans tables; put the TCC engage at a higher starting point, and ramp it up and down faster. This is somewhat akin to "staking" the TCC valve; not the same, but can help with this..... It will definitely remove the smoother engagement and bring the TCC in much faster; as well as drop it out faster. As some say, like the old 700R4.....

[97 Jimmy]

Thanks Fred, are these tables

1- TCC operating point Vs. TPS Vs. gear.
2- TCC apply and release rate Vs. TPS Vs. gear.

What about TCC WOT apply and release Vs. gear?
Les...

[97K15004WD]

Originally Posted by 97 Jimmy

Thanks Fred, are these the tables

1- TCC operating point Vs. TPS Vs. gear.
2- TCC apply and release rate Vs. TPS Vs. gear.

What about TCC WOT apply and release Vs. gear?
Les...

Les; you'll need to change all the tables to adjust the way you want the TCC to engage and disengage. Normal TCC Apply Rate (%/second) vs. tps vs. gear; etc.

NOTE: The 96 and 97 don't use ECCC, but the principle is the same regading the rates.....

Here's a link to help explain the ramp and how it works....

TCC Duty Cycle - EFILive Forum
Post number 7

[97 Jimmy]

Originally Posted by 97K15004WD

Les; you'll need to change all the tables to adjust the way you want the TCC to engage and disengage. Normal TCC Apply Rate (%/second) vs. tps vs. gear; etc.

NOTE: The 96 and 97 don't use ECCC, but the principle is the same regading the rates.....

Here's a link to help explain the ramp and how it works....

TCC Duty Cycle - EFILive Forum
Post number 7

OK, I have been looking this over, is this what I am seeing in the diagram? In JetDST for example:
1-TCC operating point (percent duty cycle) vs. TPS vs. gear.
2-Normal TCC appy rate (percent second) vs. TPS vs. gear.
The verticle numbers are percent duty cycle and percent second. By increasing duty cycle I am increasing shift firmness and by decreasing percent second I am decreasing shift time? What about TCC maximum duty cycle vs. pressure? Would like to have an idea on which way to scale the numbers, please and thank you .