Allison Transmission 4700

alsohaveadash-mountedlightthatilluminateswhenthesecondarymode
scheduleisactive.
Frequently,eitherperformanceoreconomyshiftpointsareselectedfor
theprimaryshiftschedule(reectingthemostcommonlyusedstateofthe
vehicle),andtheothersetofshiftpointsareselectedforthesecondaryshift
schedule.
TheprimaryandsecondaryshiftschedulesmustbespeciedwhentheTCM
isprogrammed.ThevehicleOEMdetermineswhichprimary/secondaryshift
schedulecombinationtheywouldlikethetransmissiontohavewhenthe
vehicleisbuilt.
4.2.5PERFORMANCE/ECONOMYSHIFTSCHEDULES(N/AforOFS
Models).Currently,AllisonTransmissionoffersthefollowingcommonly
availableshiftschedulestotheOEM(s):
•S1&S5-Performance:WOTupshiftsnearFullLoadGovernedSpeed
(FLGS)
•S2&S6-Performance:WOTupshiftsataxed(lessthan100)percent
ofFLGS
•S3&S7-Economy:Upshiftsatspeedswhichpullenginedownto
axedrpmaftertheshift
•S4&S8-Economy:Upshiftsatspeedswhichpullenginedowntoa
xedrpm(andlessthanS3)aftertheshift
•S9-Economy:Upshiftsanddownshiftsoccuratspeedsthatareeven
lowerthantheS4shiftstrategy
•SA-Economy:WOTupshiftsaresimilartoS1&S5.TheSA
part-throttleupshiftsanddownshiftsoccuratsignicantlylowerspeeds
thantheS5part-throttleshifts.
•SB-Economy:WOTupshiftsanddownshiftssimilartoSA.The
SBpart-throttleupshiftsoccuratslightlyhigherspeedsthantheSA
part-throttleupshifts.
•SC-Economy:WOTupshiftsaresimilartoS3&S7.TheSC
part-throttleandclosed-throttleupshiftsanddownshiftsaresimilarto
theSApart-throttleandclosed-throttleshifts.
•SD-Economy:WOTupshiftsanddownshiftssimilartoS3&S7.The
SDpart-throttleandclosed-throttleupshiftsanddownshiftsaresimilar
totheSBpart-throttleandclosed-throttleshifts.
SchedulesS1throughS4aretypicallyusedwithenginesusingvariablespeed
orall-speedgovernors.Thedifferencesbetweentheschedulesistypically
closetofullthrottle.SchedulesS5throughS8aredesignedtoprovidethe
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