Just curious on this one, is it possible to stall an automatic? I suppose not, as the torque convertor takes up the role of an automatic clutch. I ask this because several times I have forgotten to release the parking brake and drove off, I wonder if it really works! I did read in the manual that you should apply the brake lightly when driving from time to time so as to clean the rear drums as they arent self cleaning, I did try this but it made such a frightening noise I decided against it!
Regards
Simon
_____________________________________
SVPworld (incorporating PSRworld)
www.svpworld.com
|
I once stalled the Cortina (1968) automatic, after a harsh braking once. Also, was a passenger in a Granada which left 80 metre skidmarks once, (on the road - coming down swiftly from 200km/h! The ones on the underpants weren't quite so big!) and that one stalled.
Howevever, the Astra hasn't been subjected to such treatment yet - and I'm loathe to try it!
|
|
|
Providing always that the engine is set up and operating correctly, in theory an automatic with torque converter will not stall.
Same does not apply to Ford Fiesta / Escort with CVT auto transmission, which in most expert's opinion is a complete load of S.1. ! This has no torque converter, but drive bands that should only take up dive as revs rise. Problem is they frequently remain engaged at idle, hence stalling the engine, or causing the management system to apply such a wild throttle opening that it wants to take off down the road at 50mph !
Regards, Adam
|
|
|
I used to reverse my SD1 V8, drop it into D, then hit the gas whilst still going backwards. Never stalled.
Same trick didn't work quite as well in my 827 as the front wheels would scrabble for grip if you were still going backwards too quickly (like at all!). Never stalled though.
I'm sure this was unfair abuse, but never had any mechanical problems!
|
My father accidentally engaged Reverse whilst travelling forwards in my 1965 Triumph 2000 automatic. That took the middle out of the flexplate (i.e. the plate that joins the crankshaft to the torque converter and also carries the starter ring).
A friend with an automatic dragster(!) engaged reverse at well over 100 mph "to see what would happen". Apparently nothing much happened other than a bit of rubber smoke and some side to side weaving (and probably even smoother slicks!).
|
Adam Going mentioned the CVT transmission. On the Daf Variomatic CVT, under the right conditions, the engine could stop whilst driving along in gear. The first clue was an eerie silence as the car coasted along. The second clue was a lack of power.
|
My mum owned a Daf 44. I doubt you could use lack of power as an indication that the engine had stalled, seeing as it never had any!
|
|
Many modern engines have a valve or other mechanism to maintain the idle speed selected by the engine management system. If there is a fault OR the valve is sticking then a stall can occur as a gear is engaged. Cleaning the idle valve and/or throttle valve should clear the problem but if the sticking is caused by excessive oil blow-by due to engine wear, the problem will simply re-occur.
|
|
|
|
