Would someone please explain what is going on with the motor underneath the torque converter area that seems to be on cars with auto start/stop. How does it work? What exactly is it doing? Is it as easy as removing the obvious torx screws to remove? tia

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Jim

I believe the start stop feature includes its own starter. My 250ml has it. It sounds and feels like the start action on a honda insight. I don't know if there is actual mechanical similarity.

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

Its an auxiliary oil pump for the transmission. For immediate takeoff, the transmission needs pressure sooner than the mechanical pump can deliver it.

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90 300TE 4-M
Turbo 103, T3/T04E 50 trim
T04B cover .60 AR
Stage 3 turbine .63 AR
A2W I/C, 40 LB/HR
MS2E, 60-2 Direct Coil Control
3" Exh, AEM W/B O2
Underdrive Alt. and P/S Pulleys,
Vented Rear Discs, .034 Booster.
3.07 diffs 1st Gear Start

90 300CE 104.980
Milled & ported head, 10.3:1 compression
197° intake cam w/20° advancer
Tuned CIS ECU
4° ignition advance
PCS TCM2000, built 722.6
600W networked suction fan
Sportline sway bars
V8 rear subframe, Quaife ATB 3.06 diff

Yep, hydraulic pressure is maintained when the engine is off. All relevant shift members/clutches remain engaged.......

Thanks

If I remove it it is just a matter of bolting it back up? Would it, by any chance, expose the torque converter drain plug when removed?

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Jim

Some start/stop ring gears run on a sprag clutch so that you can have a starter motor connected to the ring gear all the time because the sprag prevents the ring gear from turning when the engine is running

It reduces wear on the ring gear and eliminates the solenoid