Revving your car when in neutral

[Solo Man]

I recently purchased BMW Tis off E-bay and according to that it seems very bad for your auto gearbox when the engine is revved for more than a few seconds in Park. For example, as I understand it if it is revved for more than about 1.2 seconds at 5000 revs your gearbox could be damaged. For revs at 2,500 no longer than max 15 min and for revs at 3,000 no longer than 60 seconds. For certain procedures you have to let the engine idle for 30 seconds between revving to ensure pressure drop in the gearbox and for the hydraulic fluid to flow back.
I am referring to "Transmission damage during emissions test" as per Tis.
Has anyone any experience of this

 

[rick540]

Only on the older E32/E34 3.5 engine and auto boxes, later they fixed the problem.

 

[WerriesM5]

+1
anything newer than '93 no problem, but that doesn't make it Ok to just sit and rev your car..

 

[Philip Foglar]

Like some "chjop" that I saw some time ago cruising past Sandton Convention Centre a few months ago in his 645i - he wanted to show-off for the people outside and in the restaurants, so he went into Neutral and blipped the throttle a few times, then popped back into Drive resulting in the car lurching forward... :facepalm:

 

[Hellas]

Hey Solo Man!How much did you pay for the TIS?

 

[Die_Miek]

Hey Solo Man!How much did you pay for the TIS?

+1

 

[Matt Q]

Revving when car is in neutral is just plain stoopid... if you want attention drop your pants!!

 

[Philip Foglar]

Revving when car is in neutral is just plain stoopid... if you want attention drop your pants!!

LOL

Swarms the giggling girls followed by plod! :whip:

 

[Clownshoe]

Reving in auto is bad. Something about oil pressures building up.

And reving an engine. Any engine will last about 5 minutes at full revs with no load.

Makes me cringe when I hear chops starting up a car from cold and revving the crap out it. :cursin:

 

[Solo Man]

Rick540, the bulletin is dated 11/2002 and it says "All BMW's with auto transmissions"

 

[Philip Foglar]

Reving in auto is bad. Something about oil pressures building up.

And reving an engine. Any engine will last about 5 minutes at full revs with no load.

Makes me cringe when I hear chops starting up a car from cold and revving the crap out it. :cursin:

I know, I almost feel the pain of those poor engines! Even the odd hooligan bike in the distance that you hear being revved bouncing off the limiter makes me cringe! :shakehead:

 

[Beast_Power]

If you want to rev your cars engine, buy yourself an old 3L ford.

And you can go to a place like Wolmer, Danville or one of those, and you can rev to your hearts content and even get someone to join you at revving.

What is anyone compensating for by revving the sh!t out of an engine ?