Horsetan Posted April 14, 2018 Share Posted April 14, 2018 Meanwhile, dans le monde Citroën, the mystery of the disappearing gearbox fluid continues......It's swallowed another half-litre of Dexron III, plus half a bottle of Lucas Transmission Fix fluid. The dipstick still looks dry when the gearbox is warm. Where the hell is it all going to? *scratches head, puzzled* Link to post Share on other sites More sharing options...
RMweb Premium PhilJ W Posted April 14, 2018 RMweb Premium Share Posted April 14, 2018 Meanwhile, dans le monde Citroën, the mystery of the disappearing gearbox fluid continues......It's swallowed another half-litre of Dexron III, plus half a bottle of Lucas Transmission Fix fluid. The dipstick still looks dry when the gearbox is warm. Where the hell is it all going to? *scratches head, puzzled* Are you pouring it into the right hole? Link to post Share on other sites More sharing options...
Horsetan Posted April 14, 2018 Share Posted April 14, 2018 Are you pouring it into the right hole? There is only one hole. It has a dipstick in it. Link to post Share on other sites More sharing options...
runs as required Posted April 15, 2018 Share Posted April 15, 2018 Can you find any sectional/exploded diagram of the transmission on the web - possibly it might be a non Citroen sourced specialist component ? dh Link to post Share on other sites More sharing options...
RMweb Premium PhilJ W Posted April 15, 2018 RMweb Premium Share Posted April 15, 2018 There is only one hole. It has a dipstick in it. You are leaving yourself open there. Seriously though I recall that there was a car (not sure of make or model) which had a similar arrangement where a special pump/tool was required to put oil into the gearbox. Link to post Share on other sites More sharing options...
Horsetan Posted April 15, 2018 Share Posted April 15, 2018 (edited) Can you find any sectional/exploded diagram of the transmission on the web - possibly it might be a non Citroen sourced specialist component ?No need. The HBOL has a sectional diagram. I've been looking at it most of yesterday. This is it, the ZF 3HP22 (FWD): Edited April 15, 2018 by Horsetan 1 Link to post Share on other sites More sharing options...
shortliner Posted April 15, 2018 Share Posted April 15, 2018 Meanwhile, dans le monde Citroën, the mystery of the disappearing gearbox fluid continues......It's swallowed another half-litre of Dexron III, plus half a bottle of Lucas Transmission Fix fluid. The dipstick still looks dry when the gearbox is warm. Where the hell is it all going to? *scratches head, puzzled* Is the most sensible idea not to pay a visit to a local dealer and have a word with the mechanics? - They are normally only too happy to answer questions like that. It may get them work in the future! Link to post Share on other sites More sharing options...
RMweb Gold russ p Posted April 15, 2018 RMweb Gold Share Posted April 15, 2018 Is the most sensible idea not to pay a visit to a local dealer and have a word with the mechanics? - They are normally only too happy to answer questions like that. It may get them work in the future! When I've taken old vehicles to garages they often look at you like you are from another planet Modern Citroen's have little or nothing in comen with it Link to post Share on other sites More sharing options...
PatB Posted April 15, 2018 Share Posted April 15, 2018 If there's no external signs of a leak (and the amount you've put in should be visible somewhere if it's coming out where it shouldn't) I'd be starting to wonder if it's finding its way into whatever passes for a bellhousing or, somehow, the engine sump. Or is it filling up its driveshaft boots, for example? Link to post Share on other sites More sharing options...
RMweb Gold russ p Posted April 15, 2018 RMweb Gold Share Posted April 15, 2018 I was wondering that I'm not too great with autos When you pour it in does it drop gradually or simply disappear? Link to post Share on other sites More sharing options...
RMweb Gold russ p Posted April 15, 2018 RMweb Gold Share Posted April 15, 2018 There isn't anything which is wiping the dipstick clean as you withdraw it is there? Link to post Share on other sites More sharing options...
RMweb Premium uax6 Posted April 15, 2018 RMweb Premium Share Posted April 15, 2018 If it was me, I'd look at the boots and the bellhousing. I'm not quite sure on an auto what the bellhousing arrangement is, but could you just be filling up the fluid flywheel? Its also not obvious, but is there a breather on the box somewhere, and its blowing it out of there? Andy G Link to post Share on other sites More sharing options...
RMweb Gold russ p Posted April 15, 2018 RMweb Gold Share Posted April 15, 2018 If it were getting into the fluid flywheel wouldn't the fluid out of that be leaking into the rest of the box? Does it still drive OK? Link to post Share on other sites More sharing options...
RMweb Premium uax6 Posted April 15, 2018 RMweb Premium Share Posted April 15, 2018 Would it depend on the seal between the two, I suppose it could be passing in one direction... Could it be leaking onto something that stops you seeing it, like a part of the chassis? Andy G Link to post Share on other sites More sharing options...
alastairq Posted April 15, 2018 Share Posted April 15, 2018 Does the final drive have a different oiling regime? Or does it use the same oil as the gearbox/torque converter? Link to post Share on other sites More sharing options...
Horsetan Posted April 15, 2018 Share Posted April 15, 2018 (edited) If it were getting into the fluid flywheel wouldn't the fluid out of that be leaking into the rest of the box? Does it still drive OK? Right, now, this is what's worrying me. When taking off from rest, everything's fine until the revs reach about 2000rpm. At that point, the drive starts slipping, the revs go up, but the rate of progress increases only slowly. It's a bit like having a CVT with loose bands. If I press on a bit more, then let go of the accelerator, the drive catches on again and progress is much sharper. If, at high speed, I give it a bit of poke, the slipping starts again. Does the final drive have a different oiling regime? Or does it use the same oil as the gearbox/torque converter? There are only two grades of lube: 10 or 15w/40 for the engine, and Dexron III for the autobox. Edited April 15, 2018 by Horsetan 3 Link to post Share on other sites More sharing options...
alastairq Posted April 15, 2018 Share Posted April 15, 2018 (edited) Do you know the capacity of the transmission? I think the torque converter has been drained..?? Whilst I know there is little by the way of like-for-like comparison...my Mustang has a Ford C4 autobox......a very commonplace,,and reliable piece of kit. Just checked an online service thread....the C4 , plus torque converter, need 8 US quarts of appropriate fluid. That's approximately 7 1/2 litres! You do know the procedure for filling, checking, & topping up, obviously......I'd bring the fluid back up to the 'add' mark, once hot....might need more than one would think....especially as the torque converter,and the final drive space, need filling as well. Is there facility for adjusting hte brake bands on the gears? Edttedted Edited April 15, 2018 by alastairq Link to post Share on other sites More sharing options...
Horsetan Posted April 15, 2018 Share Posted April 15, 2018 ...Is there facility for adjusting the brake bands on the gears? None that I know of. Link to post Share on other sites More sharing options...
alastairq Posted April 15, 2018 Share Posted April 15, 2018 Just looking at the drawing you posted......there's something that looks like a gizmo that might be for adjusting.....just underneath, to the right of the L of autolit. There is a cutaway on the drawing, and what looks like a stepped gubbins? Sorry for the technical jargon....there must be something French for it all? Also, at the top of the torque converter [as per drawing]....there is, what looks like, a threaded hole? Is this a plug for filling the torque converter? 1 Link to post Share on other sites More sharing options...
Fat Controller Posted April 15, 2018 Share Posted April 15, 2018 Just looking at the drawing you posted......there's something that looks like a gizmo that might be for adjusting.....just underneath, to the right of the L of autolit. There is a cutaway on the drawing, and what looks like a stepped gubbins? Sorry for the technical jargon....there must be something French for it all? Troc Machin? Link to post Share on other sites More sharing options...
alastairq Posted April 15, 2018 Share Posted April 15, 2018 Troc Machin? I've just googled that! Lots of images of sewing machines........ Link to post Share on other sites More sharing options...
Fat Controller Posted April 15, 2018 Share Posted April 15, 2018 I've just googled that! Lots of images of sewing machines........ It's a French equivalent to 'thingymejib' or 'what'sit/wotsit' Link to post Share on other sites More sharing options...
RMweb Gold russ p Posted April 15, 2018 RMweb Gold Share Posted April 15, 2018 Do the brake bands run in oil or are they dry? Because if they are dry the oil could be getting in them and drive would slip Link to post Share on other sites More sharing options...
alastairq Posted April 15, 2018 Share Posted April 15, 2018 AAAh! I see now.....google didn't mention wotsits.. 1 Link to post Share on other sites More sharing options...
alastairq Posted April 15, 2018 Share Posted April 15, 2018 Do the brake bands run in oil or are they dry? Because if they are dry the oil could be getting in them and drive would slip I believe they run in oil.......all they do is stop the outer ring of the epicyclic gear from turning..which transmits drive. Link to post Share on other sites More sharing options...
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