Automatic Transmission -D3

[Darious Stone]

Hey all,

Just a small clarification.Read in few sites that d3 on automatic transmission is used for hills, stop & go traffic.

When in congested traffic conditions which is common in colombo driving what advantage does it give over driving with D ?.

Is it okay for the transmission to be driven in d3 in the long run ?.

[Twin Turbo]

No,.. it stops at the 3rd forward gear and keeps from letting the O/D switch on.

[Twin Turbo]

No, you'll be not using thje 04th gear.

Stick to D  in normal driving,..

 

Edited July 6, 2018 by Twin Turbo

[Jason_Bourne]

Normally in autos those D1, D2, D3 mean transmission will not shift beyond the stated gear. Also the engine rpm where the gear shift happens is much higher than driving in D. (in D transmission usually shifts at around 2000-2500). So those gears are used under high load conditions which needs a higher rpm.

Maybe those sites suggested D3 for stop and go traffic as it would reduce gears shifting up down all the time by allowing the engine to rev higher in the same gear. That might prolong the transmission life coz less number of transmission shifts, less the wear. So they might have a point by suggesting D3 for stop and go traffic. 
 

Edited July 7, 2018 by Jason_Bourne