20CQ88 gearbox in 2011 C3 1400 diesel

This is the Forum for all your Citroen Technical Questions, Problems or Advice.

Moderator: RichardW

User avatar
xantia_v6
Forum Admin Team
Posts: 7867
Joined: 09 Nov 2005, 23:03
x 506

Re: 20CQ88 gearbox in 2011 C3 1400 diesel

Post by xantia_v6 »

Mjolinor wrote:
12 Oct 2021, 23:09
So
20CQ66 is casting shape and final drive ratio.
1009973 is internal gear ratios.

Correct?
20CQ66 is the part number of the complete gearbox. Any gearbox with that number will have the same ratios.
Mjolinor
Posts: 11
Joined: 12 Oct 2021, 11:26

Re: 20CQ88 gearbox in 2011 C3 1400 diesel

Post by Mjolinor »

GiveMeABreak wrote:
12 Oct 2021, 19:08
After you have the gearbox part number which determines the correct type like the variant and the final drive; the specific markings define the ratios.
I am trying to understand this post.

Part number is 20CQ66?

What specific markings?

Is there an exploded view anywhere. I am struggling to understand what could have gone wrong inside.

I have removed the ident bolt that I think makes the "gearlever across" movement have notches and it is OK.

I am pretty sure it is the across where the problem lies I have seen similar things before on other gearboxes where, for example, it will come out of a gear but the selector rod does not click to neutral and it clicks back into gear with the gearlever in neutral. This can result in two gears at once which is fairly terminal and you being unable to select certain gears. I think I possibly have a similar problem but an exploded view will allow me to decide the best course of action.
User avatar
GiveMeABreak
Forum Admin Team
Posts: 25415
Joined: 15 Sep 2015, 19:38
x 2831

Re: 20CQ88 gearbox in 2011 C3 1400 diesel

Post by GiveMeABreak »

If you can't already find the info on the Forum, and if you want the PSA internal part number for the gearbox and a diagram of the identification, then I've already explained the procedure:
A response to your question by a Forum Admin requiring parts or additional information requires you to have made a current contribution (£10 min.) to the Forum.
To Upgrade Your Membership & Donate Click Here

For Further Information About Vehicle Parts and VIN Numbers Click Here
Mjolinor
Posts: 11
Joined: 12 Oct 2021, 11:26

Re: 20CQ88 gearbox in 2011 C3 1400 diesel

Post by Mjolinor »

OK, Sorry. I thought it was a general forum for helping people that are stuck not a forum for raising money.

Enjoy.
Hell Razor5543
Donor 2021
Posts: 11933
Joined: 01 Apr 2012, 09:47
x 1485

Re: 20CQ88 gearbox in 2011 C3 1400 diesel

Post by Hell Razor5543 »

The PSA Group charges for access to their databases. Normally this is charged by the hour, ad the clock starts when you pay, and then continues until the money runs out REGARDLESS IF YOU ARE LOGGED IN OR NOT. This means that, should you pay for an hour but only remain logged in for 10 minutes, the remaining 50 minutes are NOT retained for you to use when you next log back in.

However, the Forum has managed to get a deal with the PSA for access to the databases. This does cost the Forum (as I am NOT a member of the Forum staff I do not know how much this is), but any members who pay the required fee will then have up to two years worth of searches available to them (from when they made the contribution), so this should work out to be a much better financial deal for any members who take this up.
User avatar
white exec
Moderating Team
Posts: 7311
Joined: 21 Dec 2015, 13:46
x 1425

Re: 20CQ88 gearbox in 2011 C3 1400 diesel

Post by white exec »

The costs of our having uninterrupted access to the new chargeable PSA/Stellantis parts database (Servicebox) for both Citroen and Peugeot are considerable, and mean that most private owners could not justify the cost. The small donation we ask for (minimum of just £10) allows all donors have Parts info (and forum the Resources area) via the forum for up to two calendar years. That is extraordinarily good value, and quite likely to enable a saving in just one well-aimed parts purchase, either from PSA direct, or from another channel.

There are also other forum and web costs to be met (IT services etc) as well as sundry costs associated with building and maintaining a technical reference library.

Forum staff usually operate out-of-pocket (literally) on many items, with home space and equipment taken up by forum demands. We do it because we think it worthwhile. None of us gets paid for time or effort.

The choice of whether to be a Donor to the forum is entirely yours.
User avatar
Paul-R
Donor 2020
Posts: 5401
Joined: 07 May 2009, 16:24
x 789

Re: 20CQ88 gearbox in 2011 C3 1400 diesel

Post by Paul-R »

I fear you're both too late as Mjolinor has probably buggered off with his own view of the forum. Ah well, tant pis!
Dormouse
Donor 2021
Posts: 1020
Joined: 15 Apr 2021, 14:32
x 227

Re: 20CQ88 gearbox in 2011 C3 1400 diesel

Post by Dormouse »

I don't know quite what he was expecting but to get access to manufacturer's information is going to cost someone and a Forum as good as this doesn't run on goodwill alone. It takes time and effort as well as paying for it's costs. Try going to your local dealer and asking for the answers he was already anticipating in advance. Besides, he was free to search the Forum to find threads relating to his questions.
Dormouse
Donor 2021
Posts: 1020
Joined: 15 Apr 2021, 14:32
x 227

Re: 20CQ88 gearbox in 2011 C3 1400 diesel

Post by Dormouse »

Found this

https://www.ebay.co.uk/itm/284483875459 ... SwrfRhYzKP

It appears to be a download of the Dealer Workshop Manual for the C3

Iffy possibly, but if correct it could be a good resource for someone working on a C3 circa 2011

Anybody got any thoughts on this?
User avatar
xantia_v6
Forum Admin Team
Posts: 7867
Joined: 09 Nov 2005, 23:03
x 506

Re: 20CQ88 gearbox in 2011 C3 1400 diesel

Post by xantia_v6 »

Mjolinor wrote:
13 Oct 2021, 11:07

I have removed the ident bolt that I think makes the "gearlever across" movement have notches and it is OK.

I am pretty sure it is the across where the problem lies I have seen similar things before on other gearboxes where, for example, it will come out of a gear but the selector rod does not click to neutral and it clicks back into gear with the gearlever in neutral. This can result in two gears at once which is fairly terminal and you being unable to select certain gears. I think I possibly have a similar problem but an exploded view will allow me to decide the best course of action.
Although the symptoms are slightly different, I think that it is likely that the underlying problem with your gearbox is that the 5th gear nut has come loose, causing the 5th gear selector fork to wear and break, putting the internal selection mechanism out of alignment. See https://www.frenchcarforum.co.uk/forum/ ... 9&start=30 for example.
Dormouse
Donor 2021
Posts: 1020
Joined: 15 Apr 2021, 14:32
x 227

Re: 20CQ88 gearbox in 2011 C3 1400 diesel

Post by Dormouse »

That thread gives quite a bit of useful information. Worth a read I think.
User avatar
Paul-R
Donor 2020
Posts: 5401
Joined: 07 May 2009, 16:24
x 789

Re: 20CQ88 gearbox in 2011 C3 1400 diesel

Post by Paul-R »

I'd be surprised if he comes back and reads any of this. He's made his mind up that we're only in it for the money.
User avatar
myglaren
Forum Admin Team
Posts: 20294
Joined: 02 Mar 2008, 14:30
x 1682

Re: 20CQ88 gearbox in 2011 C3 1400 diesel

Post by myglaren »

And a shufty through the topics would have demonstrated the opposite.