No drive on a hill start/ Gearbox bangs into gear
Forum rules
One question per topic about an Auto or semi-auto gearbox can be posted in this section
No engine questions
Think: Auto not changing up or down, snowflake/sport flashing, flappy paddles, actuator fault and sensodrive not changing gear.
One question per topic about an Auto or semi-auto gearbox can be posted in this section
No engine questions
Think: Auto not changing up or down, snowflake/sport flashing, flappy paddles, actuator fault and sensodrive not changing gear.
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- Posts: 10
- Joined: Thu Jun 27, 2019 4:02 pm
- Model: C3 2006-2009, Facelift model
- Year: 2008 (58)
- Engine Size: 1.4 (16v)
- Fuel Type: Petrol
- Mileage: 80000
- Gearbox: Automatic PRND
- DPF: No
- LHD or RHD: RHD (UK)
- Been thanked: 1 time
My wifes 08 C3 has starting to play up, when stopped at a up hill junction and she goes to pull away it revs but no gear is selected then all of a sudden it bangs into gear and moves, any ideas what could be causing this?
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- Posts: 3303
- Joined: Sat Jul 23, 2011 3:47 pm
- Model: C3 2002-2005, Original shape model
- Year: 2002 (52)
- Engine Size: 1.4 (16v)
- Fuel Type: Diesel
- Mileage: 100000
- Gearbox: Manual 5 speed
- DPF: No
- LHD or RHD: RHD (UK)
- Engine name: DV4 16-valve diesel (90 PS)
- Has thanked: 258 times
- Been thanked: 111 times
Hi
The bang of a C3 auto is usually the valve. It will throw a 'fault code 6'
There is a topic about the valves that cause the AL4 to bang here
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- Posts: 936
- Joined: Wed Jul 10, 2019 3:31 am
- Model: C3 2002-2005, Original shape model
- Year: 2003 (53)
- Engine Size: 1.4 (8v)
- Fuel Type: Petrol
- Mileage: 80000
- Gearbox: Automatic PRND
- DPF: No
- LHD or RHD: RHD
- Engine name: TU3 (75 PS)
- Location: Brisbane, Australia.
- Has thanked: 36 times
- Been thanked: 250 times
You may or may not get a warning on your central display and the computer might not log a fault code.
The AL4 auto box runs on very specific hydraulic pressures and these pressures are controlled by a modulator valve in the gearbox. Everything the gearbox does is run by these pressures so the modulator valve is very important.
Some people claim to have fixed gearbox problems by changing the transmission fluid. But 99% of the time the valve needs to be replaced.
The AL4 gearbox is fairly "popular" so most automatic transmission repairers are familiar with them.
The AL4 auto box runs on very specific hydraulic pressures and these pressures are controlled by a modulator valve in the gearbox. Everything the gearbox does is run by these pressures so the modulator valve is very important.
Some people claim to have fixed gearbox problems by changing the transmission fluid. But 99% of the time the valve needs to be replaced.
The AL4 gearbox is fairly "popular" so most automatic transmission repairers are familiar with them.
-
- Posts: 10
- Joined: Thu Jun 27, 2019 4:02 pm
- Model: C3 2006-2009, Facelift model
- Year: 2008 (58)
- Engine Size: 1.4 (16v)
- Fuel Type: Petrol
- Mileage: 80000
- Gearbox: Automatic PRND
- DPF: No
- LHD or RHD: RHD (UK)
- Been thanked: 1 time
Thanks for the replies, I tried to check the oil level but couldn't find anyway of doing it. the bolt on the underside released 800ml of oil then stopped. then there is another tube like screw with a hex head which I took out and that released the rest of the oil, which combined totalled approx 3.5 ltrs, which is what I put back in. The car ran fine on the 3 mile journey back home so the wife took to town which is approx 18 miles away and it started to play up again nearer to town, but ran fine when cooled down but statrted to play up again nearer home. It seems when up to temp it plays up. Did I put enough oil back in?
-
- Posts: 3303
- Joined: Sat Jul 23, 2011 3:47 pm
- Model: C3 2002-2005, Original shape model
- Year: 2002 (52)
- Engine Size: 1.4 (16v)
- Fuel Type: Diesel
- Mileage: 100000
- Gearbox: Manual 5 speed
- DPF: No
- LHD or RHD: RHD (UK)
- Engine name: DV4 16-valve diesel (90 PS)
- Has thanked: 258 times
- Been thanked: 111 times
I assume you put new oil in and not the old oil in? (just checking).
You can add an avatar to your account - Avatar or change your vehicle details - Car Bio or even add a signature to your posts - Signature. But this is not all you can do in the User Control Panel 

-
- Posts: 3303
- Joined: Sat Jul 23, 2011 3:47 pm
- Model: C3 2002-2005, Original shape model
- Year: 2002 (52)
- Engine Size: 1.4 (16v)
- Fuel Type: Diesel
- Mileage: 100000
- Gearbox: Manual 5 speed
- DPF: No
- LHD or RHD: RHD (UK)
- Engine name: DV4 16-valve diesel (90 PS)
- Has thanked: 258 times
- Been thanked: 111 times
Thanks

Black colour can come from the friction linings in the gearbox, as they wear excessively the bits end up in the oil. This gives the oil a dark colour, different shades of brown to show the wear of the gearbox.
You can add an avatar to your account - Avatar or change your vehicle details - Car Bio or even add a signature to your posts - Signature. But this is not all you can do in the User Control Panel 

-
- Posts: 3303
- Joined: Sat Jul 23, 2011 3:47 pm
- Model: C3 2002-2005, Original shape model
- Year: 2002 (52)
- Engine Size: 1.4 (16v)
- Fuel Type: Diesel
- Mileage: 100000
- Gearbox: Manual 5 speed
- DPF: No
- LHD or RHD: RHD (UK)
- Engine name: DV4 16-valve diesel (90 PS)
- Has thanked: 258 times
- Been thanked: 111 times
You may have this AL4 oil level checking systemDmc68 wrote: ↑Wed Mar 10, 2021 9:43 am I tried to check the oil level but couldn't find anyway of doing it. the bolt on the underside released 800ml of oil then stopped. then there is another tube like screw with a hex head which I took out and that released the rest of the oil, which combined totalled approx 3.5 ltrs, which is what I put back in.
You can add an avatar to your account - Avatar or change your vehicle details - Car Bio or even add a signature to your posts - Signature. But this is not all you can do in the User Control Panel 

-
- Posts: 10
- Joined: Thu Jun 27, 2019 4:02 pm
- Model: C3 2006-2009, Facelift model
- Year: 2008 (58)
- Engine Size: 1.4 (16v)
- Fuel Type: Petrol
- Mileage: 80000
- Gearbox: Automatic PRND
- DPF: No
- LHD or RHD: RHD (UK)
- Been thanked: 1 time
Yep that's the one, so basically if I loosen number 3 and oil comes out the level is fine?
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- Posts: 2610
- Joined: Wed May 04, 2011 10:01 am
- Model: C3 2002-2005, Original shape model
- Year: 2002 (02)
- Engine Size: 1.4 (16v)
- Fuel Type: Diesel
- Mileage: 140000
- Gearbox: Manual 5 speed
- DPF: No
- LHD or RHD: RHD (UK)
- Engine name: DV4 16-valve diesel (90 PS)
- Has thanked: 144 times
- Been thanked: 88 times
Not really totally correct
All you know it that the level is not too high, the same would result with a gearbox with no oil.
The idea is to over fill it slightly, and then to do the level checking by watching the small 'overflow' from the number 3.
If none comes out, top up a bit more and then release 3 again until there is a flow of oil out.
When the oil stops, its done.
A rather overly complicated system just to check an oil level

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