No drive on a hill start/ Gearbox bangs into gear

If you have Automatic gearbox problems or issues that would only affect an Auto, please ask here.

Please provide as much information as possible including photos you have taken and uploaded directly to the topic.
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.
My Name: Dmc68

Contributor
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
Trim Level: Exclusive
Gearbox: Automatic PRND
DPF: No
LHD or RHD: RHD (UK)
Been thanked: 1 time

Post

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?
User avatar
My Name: Arfur Dent

Guru
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
Trim Level: Exclusive
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

Post

Dmc68 wrote: Fri Mar 05, 2021 2:29 pm 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?
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
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 :)
User avatar
My Name: Ozvtr

Moderator
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
Trim Level: Other
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

Post

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.
My Name: Dmc68

Contributor
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
Trim Level: Exclusive
Gearbox: Automatic PRND
DPF: No
LHD or RHD: RHD (UK)
Been thanked: 1 time

Post

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?
User avatar
My Name: Arfur Dent

Guru
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
Trim Level: Exclusive
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

Post

Dmc68 wrote: Wed Mar 10, 2021 9:43 am which combined totalled approx 3.5 ltrs, which is what I put back in.
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 :)
My Name: Dmc68

Contributor
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
Trim Level: Exclusive
Gearbox: Automatic PRND
DPF: No
LHD or RHD: RHD (UK)
Been thanked: 1 time

Post

Yes new oil. The old oil was black
User avatar
My Name: Arfur Dent

Guru
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
Trim Level: Exclusive
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

Post

Dmc68 wrote: Wed Mar 10, 2021 12:36 pm Yes new oil. The old oil was black
Thanks :D


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.

old and new AL4 gearbox oil
old and new AL4 gearbox oil
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 :)
User avatar
My Name: Arfur Dent

Guru
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
Trim Level: Exclusive
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

Post

Dmc68 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 may have this AL4 oil level checking system


AL4 oil level checking
AL4 oil level checking
Citroen_C3_AL4_Auto_Gearbox_oil_level.jpg (74.45 KiB) Viewed 311 times


AL4 automatic gearbox Level checking plug removed
AL4 automatic gearbox Level checking plug removed
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 :)
My Name: Dmc68

Contributor
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
Trim Level: Exclusive
Gearbox: Automatic PRND
DPF: No
LHD or RHD: RHD (UK)
Been thanked: 1 time

Post

Yep that's the one, so basically if I loosen number 3 and oil comes out the level is fine?
User avatar
My Name: C3CAR

Guru
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
Trim Level: Exclusive
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

Post

Dmc68 wrote: Thu Mar 11, 2021 9:08 am Yep that's the one, so basically if I loosen number 3 and oil comes out the level is fine?
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 :o
  • Similar Topics
    Replies
    Views
    Last post