stobbie Posted January 4, 2011 Share Posted January 4, 2011 Hi, We have converted a def 110 300 tdi to automatic. We have used the engine and boxes out of a 1994 discovery. Everything worked fine in the discovery. Now in the defender we don't have any drive. What can we have done wrong? Quote Link to comment Share on other sites More sharing options...
dirtydiesel Posted January 4, 2011 Share Posted January 4, 2011 Hi, We have converted a def 110 300 tdi to automatic. We have used the engine and boxes out of a 1994 discovery. Everything worked fine in the discovery. Now in the defender we don't have any drive. What can we have done wrong? Have you bled all of the air out of the autobox fluid? Quote Link to comment Share on other sites More sharing options...
LandyManLuke Posted January 4, 2011 Share Posted January 4, 2011 Yes, assuming you've got the transfer box in gear, you probably haven't got any oil in the auto box. I found filling the oil up, then cycling gently through the gears whilst topping the oil up frequently, gets the box working properly. Quote Link to comment Share on other sites More sharing options...
ashtrans Posted January 4, 2011 Share Posted January 4, 2011 Hi, assuming the engine was split from the autobox, the most common problem is a broken pump, caused when the converter is not located correctly on the pump teeth, to check, disconnect an oil cooler pipe and start the engine, it should come out under pressure like a hose pipe, if it doesn't then the pump is broken, Dave Quote Link to comment Share on other sites More sharing options...
stobbie Posted January 4, 2011 Author Share Posted January 4, 2011 Thanks everybody. I will check the fluid. Thanks Dave, I've read this on your website already, I'll check the pump tomorrow. Quote Link to comment Share on other sites More sharing options...
LandyManLuke Posted January 4, 2011 Share Posted January 4, 2011 Did you split the auto box from the engine then? Quote Link to comment Share on other sites More sharing options...
stobbie Posted January 5, 2011 Author Share Posted January 5, 2011 Yes, we did split the engine and gearbox, but we have left the torque converter fixed to the engine, and just put the box behind it again after fitting it to the defender. if we have left the torque converter on the engine, can we still have damaged the pump then? I'm going to check if there's oil pressure in a few hours... Quote Link to comment Share on other sites More sharing options...
DaveSIIA Posted January 5, 2011 Share Posted January 5, 2011 Unfortunately, yes. Correct technique is to engage the torque converter with the auto box first and then fit the pair to the engine, before bolting the T/C to the flex plate. Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted January 5, 2011 Share Posted January 5, 2011 if we have left the torque converter on the engine, can we still have damaged the pump then? Almost certainly. Torque converter should be fitted to the gearbox to the correct depth from the bell housing face, and then the engine offered up to it. From a recent post of mine: To fit the TC I didn't use anything other than my hands, the handles for sure would make it easier, but not essential by any means... Actually fitting it, I did it a few times to make sure, it has 3 notches as it slides on, no need to line anything up before hand, it's not just the drive you need to line through, but there's 2 sets of splines as well, IIRC. Basically, slot it on as square as possible, rotate slowly with a small amount of force pushing it home, eventually it will fine it's home and slide onto the first notch, repeat, and it will find it's second, and then the third. At this point measure the distance. then quadruple check everything. I would suggest as you will be man handling the box back into it's home, rig something to make sure once you arte happy with the position, it won't slip forward upon installation, a ratchet strap and some wood would probably do it OK. But as you have fitted it the other way around, it's probably new pump time. Quote Link to comment Share on other sites More sharing options...
stobbie Posted January 5, 2011 Author Share Posted January 5, 2011 Then it will probably be the pump. We can only get 2 liters of oil in, probably because the pump doesn't work. Is the pump hard to replace/expensive? Quote Link to comment Share on other sites More sharing options...
stobbie Posted January 5, 2011 Author Share Posted January 5, 2011 We have disconnected an oil cooler line, and there is no pressure at all. So I think the pump is broken :-( Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted January 5, 2011 Share Posted January 5, 2011 Sounds it, Ashtrans will be along to tell you how to fix, if economically viable. It may well be cheaper to get a new (second hand) box in all honesty. Quote Link to comment Share on other sites More sharing options...
stobbie Posted January 5, 2011 Author Share Posted January 5, 2011 I think I have a autobox from a 3.5 v8 range rover laying around, maybe I could use the pump of that one? Quote Link to comment Share on other sites More sharing options...
DaveSIIA Posted January 5, 2011 Share Posted January 5, 2011 Pump replacement isn't difficult. The basic sequence is: Drain oil Stand box vertical Unbolt the bellhousing Lift end plate & pump assembly from casing Check for any other damage Fit new end plate & pump assembly etc Fit torque converter to box before installing to engine The pump from the 3.5 RRC should be the same and hence work correctly. Would be worth taking the pump of the 3.5 box first so that you know what is inside before attacking your autobox. Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted January 5, 2011 Share Posted January 5, 2011 That's useful to know, thanks ^^^ Now to mention cleanliness, how many pairs of rubber gloves do we need to get through to do the swap... my guess is a lot. Any dirt in the box could render it useless. Quote Link to comment Share on other sites More sharing options...
stobbie Posted January 5, 2011 Author Share Posted January 5, 2011 Thanks, great help, never done much with autoboxes so I'm a complete novice! Quote Link to comment Share on other sites More sharing options...
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