Results 1 to 3 of 3

Thread: Al5 Pics

  1. #1
    Lifetime Member Chavez91's Avatar
    Join Date
    Dec 2012

    Default Al5 Pics

    Here are a few pictures of the AL5 board if anyone was interested.


    '04 GMC LLY
    - L5P, Motech, 6-Spd Conv. ML Trans.
    '05 GMC LLY - 250%, 12mm, 67mm Custom Turbo, 6-Spd Conv. ML Trans
    '19 3500 RAM - Tuned Aisin 0_o

  2. #2
    Lifetime Member DURAtotheMAX's Avatar
    Join Date
    Nov 2005


    Ive always been surprised at how "simple" the Allison 5-speed TCM PCB was. Having personally taken apart both 5-speed and 6-speed TCM's, the difference in PCB design and construction is worlds apart. 6-speed TCM PCB is fully encapsulated, and has de-cased chips for the processor, communications chip, and memory. Its cool you can actually see the cores/internal proc architecture.

    5-speed TCM has only 2 high-side drivers for trim a and trim b. All the rest of the solenoids are just fed from/tapped off of the ignition +12v input to the TCM and then controlled via low-side FETs. A lot of through-hole components, etc. Its really mid-1990's ECU design/technology.
    2005 Silverado, CC/SB, 4x4, LT, LILLY/Allison
    12.9s @ 108 mph

    many thanks to Ross and Paul

  3. #3
    Forum tyhee Site Admin GMPX's Avatar
    Join Date
    Apr 2003


    And do you ever hear of them going faulty? Good design I think, not overly complex or shrunk too small. It is essentially a similar chipset of drivers, CPU etc as all the Delphi PCM's of this era.
    That PCB sealer stuff is a PITA though!

Similar Threads

  1. ATTENTION AL5 SWAPPERS! What PID are you using for Speed?
    By beav in forum Allison 5 & 6 Speed
    Replies: 4
    Last Post: December 8th, 2013, 01:02 PM
  2. 4.5 dmax ecm pics
    By DURAtotheMAX in forum General (Diesel)
    Replies: 10
    Last Post: December 19th, 2009, 11:11 AM
  3. Problem with V1--- Pics Inside...
    By nonnieselman in forum Lounge
    Replies: 11
    Last Post: November 2nd, 2007, 01:04 AM
  4. EFILive Sticker Pics ;o)
    By kbracing96 in forum Lounge
    Replies: 7
    Last Post: April 11th, 2007, 08:39 AM
  5. 2bar sensor pics - 12580698
    By SS2win in forum General (Petrol, Gas, Ethanol)
    Replies: 4
    Last Post: September 3rd, 2005, 12:14 PM

Posting Permissions

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