Hi all
I have a 2003 stepspeed TF that recently has a mind of its own with the gearbox
When I'm driving it will suddenly change down to 1st gear which is quite scary.
I've replaced the airflow sensor and cleaned the contacts that feed into it,but still have the same problem.
Usually only does it once or twice then all is ok.
Has the correct oil in it.
Any ideas very much appreciated.
Stepspeed problem
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Not many rules really, this board being aimed at technical issues, it shouldn't fall foul (hopefully) of some of the more personal issues that can affect forums.
Rule 1 - Is that you need to think very carefully before posting anything technical or asking anything technical relating to the security system of the car - See 'Security Issues' sticky for more info.
Rule 2 - We (MGF Register) do not support copyright infringement and therefore references to CD ROM, PDF versions or paper copies of the workshop manual (for instance) should not be posted on the forum. We don't want to get into trouble and we'd rather sell you a genuine hard copy through our Regalia shop anyway!
Because advice is honestly and freely given in this technical section, much of it will be amateur experienced based, so any information is given in good faith and is not guaranteed as correct.
- talkingcars
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Re: Stepspeed problem
Hi and welcome to the forum
When was the last time the oil was changed?
James
When was the last time the oil was changed?
James
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- Tipper
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Re: Stepspeed problem
Electrical problems sometimes affect the CVT gearbox usually corrosion of plug contacts.
There are switch contacts below the gear lever that may need cleaning and a multi-plug that connects to the front face of the gearbox low down - this is a favourite damp/corrosion spot. In addition the gearbox ECU is located behind the boot carpet inside the left rear wing. check these connections are secure.
The gearbox drops the ratio in response to throttle position and braking. Does the gearbox work in 'manual' mode?
Oh and what airflow sensor? I didn't know there was one, just a throttle position sensor but that won't affect the gearbox operation AFAIK.
You'll also find that auto gearbox 'specialists' know nothing about these cars' CVT boxes so don't bother talking to them!
There are switch contacts below the gear lever that may need cleaning and a multi-plug that connects to the front face of the gearbox low down - this is a favourite damp/corrosion spot. In addition the gearbox ECU is located behind the boot carpet inside the left rear wing. check these connections are secure.
The gearbox drops the ratio in response to throttle position and braking. Does the gearbox work in 'manual' mode?
Oh and what airflow sensor? I didn't know there was one, just a throttle position sensor but that won't affect the gearbox operation AFAIK.
You'll also find that auto gearbox 'specialists' know nothing about these cars' CVT boxes so don't bother talking to them!