4WD Low Rev Limiter?

[honda233]

Does anyone know how to remove or raise the 4WD low rev limiter? All other rev limiters 2wd high, 4wd high are all able to be moved just not 4wd low. I have never seen a chart including a 4wd low limiter.

Thanks

[honda233]

Its on a 07 silverado with a E38 ECM and 4 speed trans

[Taz]

Hello Honda233,

I don't work with 4 wheel drive conversions so I'm not sure what the correct answer may be ... but have a look at D0718 & D0719 in the TCM (4WD WOT Threshold) and H0155 in the ECM (4WD Low Speed limiter).

These may not make any difference ...


Regards,
Taz

[ScarabEpic22]

H0155 in the ECM. Right there next to the regular speed limiter value. This is in the EFILive supplied 2009_Holden_E38 .tun file OS 12624402. If its not available in your OS post your tune and OS #.

EDIT:
Taz beat me to it, I spaced and didnt even see his reply. Doh!

[honda233]

I have already tried those both and still nothing in 4wd low. Thank you though. Any other ideas? I heard a rumor about putting a switch between a wire from the transfer case or tranny in order to trick the Ecm to thinking its still in 4wd high, but i have no idea which wire or if that even really works.

[ScarabEpic22]

Hmm, what OS are you running? Post ECM and TCM tunes, maybe theres something else in there. Or it could be an error in the calibration, cant know unless we see the tunes.