Results 1 to 2 of 2

Thread: If I increase shift speeds do I also need to increase TCC and shift pressure?

  1. #1
    New Member
    Join Date
    Jul 2010
    Posts
    2

    Default If I increase shift speeds do I also need to increase TCC and shift pressure?

    I have a 2009 1500 5.3 6spd. I increased the normal shift speeds by 35% do I also need to change the TCC engage and release times and shift pressures?

  2. #2
    Joe (Moderator) joecar's Avatar
    Join Date
    Apr 2003
    Posts
    28,403

    Default

    On the 4 speed:

    Not necessarily... but you can increase shift pressure by 10-15% anyway, set shift times to 0.25s, and play a little with torque reduction... aim for quick positive crisp upshifts without jerking, don't make changes to drastic.

    What mods do you have, how much torque, what is vehicle weight...?

    For TCC, set the TCC min pwm/pressure to say 20% below the max, this will ensure the TCC is all the way locked and not slipping.

    $0.02.

Similar Threads

  1. Sudden increase in Air/Cyl
    By Mileage in forum E37, E38 & E67 PFI ECM's
    Replies: 35
    Last Post: June 9th, 2009, 11:09 AM
  2. Cranking VE, generally increase/decrease?
    By efizjb in forum Gen III V8 Specific
    Replies: 11
    Last Post: April 11th, 2009, 12:29 PM
  3. Mileage Increase on Trucks
    By MSURacing in forum Tuning For Economy
    Replies: 31
    Last Post: May 12th, 2008, 11:42 AM
  4. LBZ defuel/rpm increase progress?
    By Cobra#3747 in forum Duramax 06 LLY / 06+ LBZ & LMM
    Replies: 3
    Last Post: August 7th, 2007, 11:34 AM
  5. fuel pump prime - increase time?
    By 350SS in forum General (Petrol, Gas, Ethanol)
    Replies: 12
    Last Post: April 8th, 2007, 09:06 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •