Allison Transmission 4700

11.2.2PaintingofTransmissionControlComponents.Whileitmaybe
desirabletopaintchassis-mountedcomponentstoenhancetheoverall
vehicleappearanceand/orprovidecorrosionprotection,thetransmission
controlcomponentsmustnotbepainted.Paintingtransmissioncontrol
componentscan:
•compromisetheintegrityofconnectorsandconnectorseals.
•reducethermalconductivityfrominsidetheTCMtoambientair.
•coverlabelsorotheridentication,hinderingtheprocesstoservice
thesecomponents.
11.3ENVIRONMENT
AllisonTransmissiondesignedtheAllisoncontrolsandcomponentsto
operateinnormalvehiclecabandchassisenvironments.TheAllisoncontrols
andcomponentscanwithstandmoisture,directlight,heat,andshockloads.
TheTransmissionControlModule(TCM),Allisonshiftselectorsandtheir
connectorsaresealed,butarenotconsideredimmersible.Installationofthe
Allisoncontrolsandcomponentsmustmeettheenvironmentalrequirements
inAllison5thGenerationand6thGenerationControlsData.Inaddition,
mounttheAllisoncontrolsandcomponentsawayfromdirectexposureto
roadhazardsandweather.Inordertomeetthetemperaturelimitslistedin
Allison5thGenerationand6thGenerationControlsData,allowforfreeair
movementaroundeachcomponent.Theairmovementdissipatesheataway
fromthecomponents.Exceedingthetemperaturelimitsreducesthelifeof
thecomponents.
11.4COMPONENTACCESSREQUIREMENTS
Accesstoservicethecontrolsandcomponentsisnecessarythroughoutthe
lifeofthevehicle.Considerserviceaccesstotransmissioncomponents
wheninstallingauxiliaryvehiclecontrolsandcomponents,includingtheeffort
requiredtoremovecovers,bodyparts,orchassismemberstogainaccess
tothetransmissioncomponent(s)beingserviced.
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