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M35 Trans Un/lock Mod

Sunkist

By Sunkist,
in Four Door Family & Wagoneers

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BoostdR Mentor

BoostdR

Posted
Posted

I guess the idea is to give more direct response in manual mode without the cushion of the converter. I agree with a power increase without a corresponding trans reprogram lockup is a bad idea at high throttle openings. 6 years is a good soak test.

I called Mike yest twice to confirm his thoughts... Can't argue with hard data. I'll keep investigating this power switch

scotty nm35 Grand Master

scotty nm35

Posted
Posted

Well the same TCU is in the V35 which has a power switch, I can only assume they left it out in the Family wagon version. The switch input may still be there unused though...

I have the Jatco transmission service manual here, I should look to see if the pin is marked 'Power mode' :P

  • Like 1
BoostdR Mentor

BoostdR

Posted
Posted (edited)

Sounds like a plan Scotty, I'll have a look through the functions menu on the G-Scan and see if I can activate it via CAN command. From schematics it looks like the signal to activate 'Power' mode is transferred to the TCM by the CAN line which will make things harder to synthetically simulate(not impossible). If I can activate it I can easily log shift durations/manual change down rpm points/change points vs throttle position to prove how much the power map changes things to work out if further research is justified.

Matt

Edited by BoostdR
scotty nm35 Grand Master

scotty nm35

Posted
Posted

Well, looks like the power switch has nothing to do with the TCU, it must go to the ECU then down the CAN line, or perhaps just the ECU is doing all the adjustments directly. A lot of it would be throttle control and timing alterations anyway, for gear shifting.

  • 2 weeks later...
BoostdR Mentor

BoostdR

Posted
Posted

Interesting reading of the consult 3 manual.

Clear Calibration data of the TCM (EEPROM Clear)

1. Shift selector to R(engine stopped ign ON)

2. Depress and hold brake pedal. Erase DTC while depressing accelerator pedal angle to 25-50%

3. Ignition switch to OFF (Hold for 10sec)

4. Ign sw to ON (10sec)

5. Ign sw to OFF(10Sec)

6. Ign sw to ON(10SEC)

7. Start

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