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Forum LockedHOW TO RUIN YOUR GEARBOX

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Andyboy View Drop Down
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Direct Link To This Post Topic: HOW TO RUIN YOUR GEARBOX
    Posted: 08-July-2003 at 13:59
the best way to ruin a 4 speed automatic gearbox is to let it idle for more than a couple of minutes in park or neutral. Revving the engine in P or N will destroy it quite quickly. As these boxes get old, oil leaks past the pump and partially engages the forward clutches. Jack up the car and let the engine idle in N with the handbrake off. See the wheels turning slightly? That's the clutches partially engaged. Because they are slipping, they will overheat and burn out - no drive. So at the lights, leave it in D - even for long jams. The torque converter will do all the work. If you have to run the engine for maintenance, jack the car up, handbrake off and in Neutral. This takes the pressure off the clutches.
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DesE39 View Drop Down
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Direct Link To This Post Posted: 08-July-2003 at 14:35

Is this the same for the E39 5 SPeed Steptronic box ? In heavy traffic etc I always knock into N and flick into D when needed.

Cheers - Des

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Direct Link To This Post Posted: 08-July-2003 at 17:45
Not sure about these later ones but the 4 speeds are definitely afflicted. Everything from 316 up wards.
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Direct Link To This Post Posted: 08-July-2003 at 20:13
i would like to know if this affects the E39 too, i always knock it into neutral at traffic lights etc because i assumed it was better for the gearbox.
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Direct Link To This Post Posted: 09-July-2003 at 21:59
I don't think 5 speeds are affected by this......
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