Tune changes for Trans Swap

by Michael Decipha Ponthieux
Last Updated: 8-18-2013

The following are changes that may be required when swapping different transmissions types.
PIDParameterManual ValueAutomatic ValueComment
TRLOADTransmission Type0 > 3This scalar determines the type of transmission present, 0=forced neutral, 1=no clutch sw, 2=1 clutch sw, 3=both switches, 4=auto w/ drive sw, 5=auto w/ pressure sw, 6=auto w/ MLPS
TSTRATTrans Strategy0 or 12+Determines the trans strategy to use, 0=none, 1= shift light, 2=a4ld, 3=axod, 4=e4od, 5=a4ld-e, 6=fax4, 7=4r70w/aode, 8=4eat, 9=cd4e
THE FOLLOWING APPLIES TO 98+ ECU's
OSS_HPOSS Present01may or may not be present on manual transmission
OSS_INT_SWOSS Enable01it is not absolutely required to alter this value
OSS_TEETHOSS Count126+update the oss count with the # of teeth on your oss sensor (if your trans has one)
AUTO_TRNS_SWAuto Trans Present01
TRS_TYPEShift Sensor Type01
OSS_ERR_SWOSS Error Enable01not absolutely required to change this value
OS_NOISE_SWOSS Noise Enable01not absolutely required to change this value
OTEMP_ERR_SWOvertemp Error Enable01not absolutely required to change this value
SFT_ERR_SWShift Error Enable01not absolutely required to change this value
SW_1743_TCILTCIL 1743 Enable01not absolutely required to change this value
TCC_FNERR_SWTCC Error Enable01not absolutely required to change this value
TCC_ERR_SWTCC Error Enable01not absolutely required to change this value
TRANS_SLP_SWTrans Slip Error Enable01not absolutely required to change this value
TRS_ERR_SWTRS Error Enable01not absolutely required to change this value
VSS_ERR_SWVSS Error Enable01not absolutely required to change this value
VS_NOISE_SWVS Noise Enable01not absolutely required to change this value
TCC_ON_SWTCC On Enable01not absolutely required to change this value
TCC_CK_MILSWTCC Check MIL Enable01not absolutely required to change this value
MLPS_KOEO_ENMLPS KOEO Test Enable01not absolutely required to change this value
FNSSCTL2Shift Solenoid ConfigTABLETABLEshould not change this table unless the a different automatic transmission strategy is used

For more specifics on tuning an automatic transmission check out the Trans Write up.


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