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Old 17th March 2020, 12:09   #1
BRG75
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Default Auto Gearbox Creep. 2001 2.5 V6

Not difficult to live with, but certainly not "right" either.

Nothing in Haynes, so any help appreciated.

Tickover is a steady 600 rpm, put car into D, or R, without foot on brake, and the car actually moves off.

I used the word creep in the title, to simply explain the problem, it is far more than a creep.

I suspect that it is likely to be whatever the transmission control unit is called, and hoping that it might be a T4 adjustment / setting.

Thanks for any assistance.

Mike
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Old 17th March 2020, 12:26   #2
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Not sure I understand what you're asking. If you're asking is it normal for an automatic to move in D or R if the brake is not engaged then yes, all autos move if D or R is selected.

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Old 17th March 2020, 12:32   #3
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Thanks Vitesse, but not still on 600 rpm.

All autos I've previously had, will stay motionless on tickover.

Some might loose a few RPM (also normal) but this one stays rock solid on 600rpm, and probably moves at a walking pace, although I've not analysed it to that extent.

Thanks again.

Mike
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2002 75 1.8 auto Club SE,
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1997 420 (Company Car)
1996 216 cabriolet,
198? 213 VDP
1986 SD1 V8 VDP,
1968 2000TC,
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Old 17th March 2020, 12:51   #4
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Both my autos also creep on tickover, can understand it with the torque from a diesel 75, but my little 1.3 petrol Daihatsu also does it.

I've always thought this to be normal and useful for creeping along in very heavy traffic.
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Old 17th March 2020, 13:12   #5
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Mine does it.
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Old 17th March 2020, 13:15   #6
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Mine does it, totally normal. I've never been in an automatic that DOESN'T do it !
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Old 17th March 2020, 13:24   #7
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Well Steve, my eyes have been opened.

I've just done some quick internet research, and apparently there have been some developments (numerous I imagine) with auto boxes.

One such design, or maybe a generation, is called a DCT, and these boxes are indeed designed to creep. DCT stands for Dual Clutch Transmission, with the clutches being computer controlled - and don't our 75's just love computer control.

So, accepting now that the creep itself is to be expected, I'll change the question to "how fast"

I will also do a test this afternoon, and report what my road speed is at 600rpm.

Live and Learn,

Thanks

Mike
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198? 213 VDP
1986 SD1 V8 VDP,
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Old 17th March 2020, 13:54   #8
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It will depend on the slope of the road, ie, uphill or downhill.
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Old 17th March 2020, 14:23   #9
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OK, from post 7, I've used a level part our local car park, and recorded 5 mph, in drive, after travelling about 18 feet. (a fence with 6ft panels had conveniently been installed)

So, scientifically enough, with no throttle, 600rpm tickover, 5 mph.

I still feel that this is too fast, but stand to be corrected, if I'm wrong.

Regards

Mike

Last edited by BRG75; 17th March 2020 at 20:40..
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Old 17th March 2020, 14:58   #10
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The boxes also have hill hold control - to stop you rolling backwards on a slope. I think it possibly adds a little more revs if needed.
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