Please use these settings for 8hp / CANBUS Automatic transmit:
1mbit preferred
BOOSTEC requested information from auto controllers:
Transmit:
0x556 for GEAR indicator
U8
(Reference name in BOOSTEC: ATCMDGEAR)
Offset 0
Details:
0 for neutral
1-8 for forward gears
And 128 for park
255 for reverse (could also be interpreted as signed 8bit, 255 means -1)
0x556 for TQ Limit / TQ Cut
16 bit little endian
Ref: TQLimitTCM
Offset 2
Details:
Absolute value
Send ffff if inactive
0x556 for REV UP Request
16 bit little endian
Ref: REVUPReq
Offset 3
Details:
Send 0 for no request or ffff if inactive.
General 1HDFTE transmission information:
There’s heaps of options:
4l80 with no TCM control/ultra basic – Most don’t have line pressure control that I’ve seen, mostly manualised with TCLU done on a switch.
6r80 with 2 options I’ve seen: 1. no torque control or boost cut -shift control (basic TCM) – or 2. The BEST is to use a proven controller like the QUICK 6 controller from PDI for instance. Lock up control, shift control and pressure control are used with an adaptive learning method. The more inputs the controller has, the better it will be. Quick6 has a learning mode. PDI supply and make these conversions if you’re interested.
442f With full control TCM from boostec – good for higher power.
Maps are all open source/editable, definitions can be edited. Full line control, lock up control, shift control, tq cut as standard. The stock TCM has very limited controls when coupled with higher engine power. Hence using our TCM replacement.
a750 with full control TCM from boostec – mid power good drivability.
Maps are all open source/editable, definitions can be edited. Full line control, lock up control, shift control, tq cut as standard. The stock TCM has very limited controls when injection duration changes are done through a chip. Hence our own TCM again with proper 2-way communication between engine and transmission controllers.
8hp7x with partial/good control (turbolamik) and boostec (reasonably good comms and torque control)
Full line control, lock up control, shift control, tq cut as standard if programmable.
8hp7x with full control (can tcu) and boostec CANTCU definition pack.
Maps are all open source/editable, definitions can be edited. Full line control, lock up control, shift control, tq cut as standard. Full integration between ENGINE and TRANSMISSION and the programming team is accessible for custom work on both sides. Any custom work has been easy done.
CAN TCU is the ultimate with 8hp IMO,
-factory drivability
-factory safety features
-all drive modes (normal, ECO, sports, sports+, Manual)
-No soldering or removal of original TCM
-3 hour installation to driving
-Skip shift gear changes (very important)
-Factory TQ reduction Strategy all on CANBUS
My recommendations are based on budget usually.
If you want good performance without breaking the budget, stick to using your factory trans and modify it/control it to suit your power. Then I’d go down the path of the conversion gearboxes. 4L80 is fairly rough but can take a pounding, 6r80 has probably one of the best value for money combinations, 8hp IMO is the best if budget isn’t an issue. There is easy and hardways for all those combinations, so best to speak to guys that know them thoroughly.
Make sure if going auto, you have something controlling the auto that is suitable for your application. Good drivability is usually associated with a smart controller. No controller or basic controller/factory controller, usually means drivability suffers.
-Chris
Boostec