Auto gearbox, no drive.

DaveL · 24th June 2015, 17:25

Hi to one and all. Having a problem with my 'T' reg petrol 2.0 auto. I am presently down in England visiting family. Car (with wife) in Fife, Scotland.
The 75 was driving normally until it stopped driving , engine starts and runs fine. No EP on dash board and when gearlever is put into the various positions the correct gear readout is shown on the dash.

AA called out by wife as I am 360 miles away. The AA man topped up the transmission fluid and tried to see if the gears now worked. They did not.

Car transported to local garage who topped up fluid more as it was still low. Car drives in reverse but as the mechanic says in forward the drive feels as if the clutch was slipping in a manual car. If I get a replacement Gearbox ecu, does it need coding to my car?

Diagnostics run and came up with Auto gearbox ecu fault (do not have code at present). Cleared faults and tried again, Still same prob. checked fault code and came back as before. I know others have had faults with EP showing on dash but this is throwing me as no such fault is on my car. Although car is 'T' reg only has known mileage of 70,000. Wifes needs car to get back and forward to local hospital.

Look forward to your sages advice.
DaveL

Astraeus · 24th June 2015, 20:54

Another ECU should work without coding although it may need coding to get fault codes etc. The ECU is under glovebox. I have one if you want to send me a PM

Chris

mh007 · 24th June 2015, 21:37

Not that it makes much difference now but let's hope both the AA man & the garage used the correct fluid.

That sounds suspiciously like a Reverse Piston failure to me to be honest.
(the Reverse Piston will affect forward gears too despite its name).

If you go down the used gearbox route, make sure you also replace the torque converter.

DaveL · 24th June 2015, 22:25

Garage used correct fluid as they had to order in. The AA man, who knows? Did not seem to know much about 75's as he was asking me technical questions even though I was 300+ miles away.

Thanks for the advice and I am going first with Chris's ECU replacement.

DaveL · 11th August 2015, 17:30

Well it seems a long time since I started this thread. Have just got back up to Scotland to look at my 75. It appears that my garage friend did use the latest equivalent oil for the gearbox. Started and moved the car under its own steam. Took car for a run of about 20 miles with the gears changing properly. This was with the replacement Gearbox ECU that I had from Chris. Just as the car was coming back, the gears went and no drive. Car put in reverse and drove in reverse. So back to square one.

Any useful thoughts would be appreciated.

mh007 · 11th August 2015, 17:46

I'm afraid I still think it's a reverse piston fault.

Did you take the car on the 20 mile run or did someone at the garage do this ?

Alan123 · 11th August 2015, 18:18

Has said above sounds very much like the reverse piston.

This can be repaired quite easily & you don't have to remove the gearbox to do it

DaveL · 11th August 2015, 20:12

Thanks for that, I did not take it for a run my friend has and I respect what he says. I do not think I will be sorting the Rover out as I now have too many other things down South to do. Sad to see the car as it is but that is life. Need to sort family out.

DMGRS · 11th August 2015, 20:52

If you can find a specialist that knows the job and these cars, it'd be cheaper to sort than finding a replacement car. The piston itself is a cheap enough part, just need to find someone who knows their onions to fit it.

rrobson · 12th August 2015, 00:10

Quote:

Originally Posted by Alan123

Has said above sounds very much like the reverse piston.

This can be repaired quite easily & you don't have to remove the gearbox to do it

I disagree. You don't lose all drive with reverse piston failure. And you certainly wouldn't get it back for a couple of miles.

With it working after the ecu change, it sounds like it could be an electrical problem but the first thing I'd check is the selector cable, make sure it's tight and hasn't slipped.

24th June 2015, 17:25	#1
DaveL Newbie Rover 75 Saloon Join Date: Mar 2011 Location: Cupar Posts: 15 Thanks: 1 Thanked 2 Times in 2 Posts	Auto gearbox, no drive. No faults on dash. Fluid topped up!!! Hi to one and all. Having a problem with my 'T' reg petrol 2.0 auto. I am presently down in England visiting family. Car (with wife) in Fife, Scotland. The 75 was driving normally until it stopped driving , engine starts and runs fine. No EP on dash board and when gearlever is put into the various positions the correct gear readout is shown on the dash. AA called out by wife as I am 360 miles away. The AA man topped up the transmission fluid and tried to see if the gears now worked. They did not. Car transported to local garage who topped up fluid more as it was still low. Car drives in reverse but as the mechanic says in forward the drive feels as if the clutch was slipping in a manual car. If I get a replacement Gearbox ecu, does it need coding to my car? Diagnostics run and came up with Auto gearbox ecu fault (do not have code at present). Cleared faults and tried again, Still same prob. checked fault code and came back as before. I know others have had faults with EP showing on dash but this is throwing me as no such fault is on my car. Although car is 'T' reg only has known mileage of 70,000. Wifes needs car to get back and forward to local hospital. Look forward to your sages advice. DaveL Last edited by DaveL; 24th June 2015 at 17:53.. Reason: making thread more readable

24th June 2015, 20:54	#2
Astraeus Regional Secretary North Scotland MG ZS Exclusive 1.0T Auto 2022 Join Date: Feb 2008 Location: Tayport Posts: 5,754 Thanks: 1,676 Thanked 1,855 Times in 1,058 Posts	Ecu Another ECU should work without coding although it may need coding to get fault codes etc. The ECU is under glovebox. I have one if you want to send me a PM Chris

11th August 2015, 17:30	#5
DaveL Newbie Rover 75 Saloon Join Date: Mar 2011 Location: Cupar Posts: 15 Thanks: 1 Thanked 2 Times in 2 Posts	Auto gearbox, no drive. Well it seems a long time since I started this thread. Have just got back up to Scotland to look at my 75. It appears that my garage friend did use the latest equivalent oil for the gearbox. Started and moved the car under its own steam. Took car for a run of about 20 miles with the gears changing properly. This was with the replacement Gearbox ECU that I had from Chris. Just as the car was coming back, the gears went and no drive. Car put in reverse and drove in reverse. So back to square one. Any useful thoughts would be appreciated.

11th August 2015, 20:52	#9
DMGRS Discount MG Rover Spares Rover 75 CDTi, 2x MG ZS180 Join Date: Jun 2011 Location: Hythe, Southampton Posts: 11,320 Thanks: 456 Thanked 3,377 Times in 2,027 Posts	If you can find a specialist that knows the job and these cars, it'd be cheaper to sort than finding a replacement car. The piston itself is a cheap enough part, just need to find someone who knows their onions to fit it. __________________ Your trusted MG Rover specialist! Tel: 02380 001133 / Email: [email protected] We now have a 'chat' function on our site for even quicker replies. Give it a try! Remember - discount code FORUM5 for 5% off

24th June 2015, 21:37	#3
mh007 This is my second home MG ZT260 SE, MG ZT190+, MG ZTT 160, R75 Conn SE 2.0, R75 Conn SE 2.5 X 3, R75 Club SE 1.8, P5B Coupe Join Date: Jul 2009 Location: Keynsham, Bristol Posts: 4,211 Thanks: 65 Thanked 635 Times in 499 Posts	Not that it makes much difference now but let's hope both the AA man & the garage used the correct fluid. That sounds suspiciously like a Reverse Piston failure to me to be honest. (the Reverse Piston will affect forward gears too despite its name). If you go down the used gearbox route, make sure you also replace the torque converter.

24th June 2015, 22:25	#4
DaveL Newbie Rover 75 Saloon Join Date: Mar 2011 Location: Cupar Posts: 15 Thanks: 1 Thanked 2 Times in 2 Posts	Garage used correct fluid as they had to order in. The AA man, who knows? Did not seem to know much about 75's as he was asking me technical questions even though I was 300+ miles away. Thanks for the advice and I am going first with Chris's ECU replacement.

11th August 2015, 17:46	#6
mh007 This is my second home MG ZT260 SE, MG ZT190+, MG ZTT 160, R75 Conn SE 2.0, R75 Conn SE 2.5 X 3, R75 Club SE 1.8, P5B Coupe Join Date: Jul 2009 Location: Keynsham, Bristol Posts: 4,211 Thanks: 65 Thanked 635 Times in 499 Posts	I'm afraid I still think it's a reverse piston fault. Did you take the car on the 20 mile run or did someone at the garage do this ?

11th August 2015, 18:18	#7
Alan123 Posted a thing or two Rover 75 saloon Join Date: Oct 2013 Location: Darlaston Posts: 1,897 Thanks: 484 Thanked 325 Times in 261 Posts	Has said above sounds very much like the reverse piston. This can be repaired quite easily & you don't have to remove the gearbox to do it

11th August 2015, 20:12	#8
DaveL Newbie Rover 75 Saloon Join Date: Mar 2011 Location: Cupar Posts: 15 Thanks: 1 Thanked 2 Times in 2 Posts	Thanks for that, I did not take it for a run my friend has and I respect what he says. I do not think I will be sorting the Rover out as I now have too many other things down South to do. Sad to see the car as it is but that is life. Need to sort family out.