Autobox problems - possible cause? - Page 8

beinet1 · 10th March 2014, 18:51

Quote:

Originally Posted by Ked900

Hi there,
I'd like to thanks Beneit1 for this how-to that helped me keep my 75 2.5L on the road. All the advices in this thread were realy helpful and I had no problem to open my gearbox, find the cuase of my troubles (craked reverse piston and some plates to replace), order the parts needed and repair my auto-box.
Ended this xeek-end and everything works fine.
So many thanks for all this forum do for us.

Thank you very much for the feedback

So nice to see that the experience I have shared is usefull for someone

salop75 · 13th August 2014, 18:41

Hi, I'm after some advice with my Rover 75s auto gearbox.
The car is 53 plate 2.5 with 122k miles.
The auto box has performed flawlessly until now.

Today I had the car serviced, oil, filters, coolant, auxiliary belts and auto gearbox oil. The upshot is the car seems fine except for it loosing reverse, which is a pain. Reverse engages with the slight bump? as expected but then nothing happens. I'll be re-reading this thread again shortly(it's been a long day). I wonder if this is a symptom of a cracked reverse piston or the wrong bolt was removed during the drain process?

Next I'll need to think about how to repair. In the meantime any advice or thoughts are welcome

Cheers, John.

klarzy · 13th August 2014, 18:48

Quote:

Originally Posted by salop75

Hi, I'm after some advice with my Rover 75s auto gearbox.
The car is 53 plate 2.5 with 122k miles.
The auto box has performed flawlessly until now.

Today I had the car serviced, oil, filters, coolant, auxiliary belts and auto gearbox oil. The upshot is the car seems fine except for it loosing reverse, which is a pain. Reverse engages with the slight bump? as expected but then nothing happens. I'll be re-reading this thread again shortly(it's been a long day). I wonder if this is a symptom of a cracked reverse piston or the wrong bolt was removed during the drain process?

Next I'll need to think about how to repair. In the meantime any advice or thoughts are welcome

Cheers, John.

Was the fluid changed in the correct way, with the right temperature and the exact amount??

There is a very specific procedure... search the forum for ATF and you should find the how to's...

NigelOBB · 14th August 2014, 08:32

Does sound like either to much to little, wrong fluid or not bled properly, Worse case it's uncovered a cracked reversing piston

salop75 · 14th August 2014, 15:57

Klarzy, I know the procedure well i've done it twice. Whether the garage have done it spot on i can't be sure. I'll quiz them on the brake band bolt on Monday.

I brought the car down to London last night, 160 perfect miles, in-fact the box was very smooth in forward gears, parking was a pain

NigelOBB, could be the piston, its a high milage car. Good points you make and tbh its hard to tell if the job has been done right unless you do it yourself but the mechanic described the fill and drain procedure very well. Perhaps simply the change of oil gave the piston that last little nudge.

How difficult is it to change the reverse piston? - This is where things get tricky, who do i trust to do the job right? It might be possible to arrange help from members - i'm happy to pay a good hourly rate.

Unfortunately I don't have the facilities to get the car on ramps and do the work myself. I do feel a bit stuck between a rock and a hard place

Anyhow next steps are to get back to Shropshire and check exactly what work was done and then formulate a plan of action.

I guess if it turns out worthwhile to attempt to fix the piston then it might be worth overhauling the solenoids too?

Cheers, John

salop75 · 18th August 2014, 10:03

A quick update. The car was driven down to London and then Sheffield (without Reverse) with no issues what so ever, purred along.

This morning 'EP' on the dash and the autobox seems reticent to change up, or rather the engine is under powered. Have left it a while and will go and check again.

I think the car is about to take a trick back to the garage who last worked on it, but obviously my milage may vary with a 'it broke whilst in your care, you fix it approach!' attitude.

John

NigelOBB · 18th August 2014, 14:09

That's a good idea keep us posted.
There is a good guide about changing piston, in the how to section.. Also found this http://www.the75andztclub.co.uk/foru...d.php?t=189067..
It's important gear box is run up to the correct temp when checking oil..
Hope you get it sorted out, keep us posted

beinet1 · 22nd January 2018, 19:05

Have just restored the images in this old thread. Might still be useful for the future

Comfortably Numb · 26th January 2018, 00:13

Fascinating thread! Anyone who dares to strip and repair an autobox at home gets my vote! Every manual I have ever read says "for autobox repairs - take it to a specialist. This work is beyond the scope of this manual and requires special equipment." or similar. No longer will I regard autoboxes as the work of conjurors and magicians, thanks to you, Einar.

beinet1 · 26th January 2018, 08:14

Quote:

Originally Posted by Comfortably Numb

Fascinating thread! Anyone who dares to strip and repair an autobox at home gets my vote! Every manual I have ever read says "for autobox repairs - take it to a specialist. This work is beyond the scope of this manual and requires special equipment." or similar. No longer will I regard autoboxes as the work of conjurors and magicians, thanks to you, Einar.

Thanks

This was done nearly 6 years ago, and this autobox has done 16000miles performed well since that. It might be on time to replace the ATF fluid

14th August 2014, 08:32	#74
NigelOBB This is my second home 04 Rover 75 Contemporary SE - 53 Rover 75 Connoisseur -94 Mercedes W140 - 72 VW Beetle 1300 Join Date: Sep 2012 Location: Sunderland Posts: 4,767 Thanks: 1,379 Thanked 493 Times in 429 Posts	Does sound like either to much to little, wrong fluid or not bled properly, Worse case it's uncovered a cracked reversing piston __________________ [SIGPIC][/SIGPIC] Keep smiling - it makes people wonder what you've been up to.

14th August 2014, 15:57	#75
salop75 Avid contributor Rover 75 2.5 Conn SE Saloon Auto Join Date: Nov 2006 Location: Shrewsbury Posts: 193 Thanks: 1 Thanked 0 Times in 0 Posts	Klarzy, I know the procedure well i've done it twice. Whether the garage have done it spot on i can't be sure. I'll quiz them on the brake band bolt on Monday. I brought the car down to London last night, 160 perfect miles, in-fact the box was very smooth in forward gears, parking was a pain NigelOBB, could be the piston, its a high milage car. Good points you make and tbh its hard to tell if the job has been done right unless you do it yourself but the mechanic described the fill and drain procedure very well. Perhaps simply the change of oil gave the piston that last little nudge. How difficult is it to change the reverse piston? - This is where things get tricky, who do i trust to do the job right? It might be possible to arrange help from members - i'm happy to pay a good hourly rate. Unfortunately I don't have the facilities to get the car on ramps and do the work myself. I do feel a bit stuck between a rock and a hard place Anyhow next steps are to get back to Shropshire and check exactly what work was done and then formulate a plan of action. I guess if it turns out worthwhile to attempt to fix the piston then it might be worth overhauling the solenoids too? Cheers, John Last edited by salop75; 14th August 2014 at 16:01..

18th August 2014, 14:09	#77
NigelOBB This is my second home 04 Rover 75 Contemporary SE - 53 Rover 75 Connoisseur -94 Mercedes W140 - 72 VW Beetle 1300 Join Date: Sep 2012 Location: Sunderland Posts: 4,767 Thanks: 1,379 Thanked 493 Times in 429 Posts	That's a good idea keep us posted. There is a good guide about changing piston, in the how to section.. Also found this http://www.the75andztclub.co.uk/foru...d.php?t=189067.. It's important gear box is run up to the correct temp when checking oil.. Hope you get it sorted out, keep us posted __________________ [SIGPIC][/SIGPIC] Keep smiling - it makes people wonder what you've been up to.

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13th August 2014, 18:41	#72
salop75 Avid contributor Rover 75 2.5 Conn SE Saloon Auto Join Date: Nov 2006 Location: Shrewsbury Posts: 193 Thanks: 1 Thanked 0 Times in 0 Posts	Hi, I'm after some advice with my Rover 75s auto gearbox. The car is 53 plate 2.5 with 122k miles. The auto box has performed flawlessly until now. Today I had the car serviced, oil, filters, coolant, auxiliary belts and auto gearbox oil. The upshot is the car seems fine except for it loosing reverse, which is a pain. Reverse engages with the slight bump? as expected but then nothing happens. I'll be re-reading this thread again shortly(it's been a long day). I wonder if this is a symptom of a cracked reverse piston or the wrong bolt was removed during the drain process? Next I'll need to think about how to repair. In the meantime any advice or thoughts are welcome Cheers, John.

18th August 2014, 10:03	#76
salop75 Avid contributor Rover 75 2.5 Conn SE Saloon Auto Join Date: Nov 2006 Location: Shrewsbury Posts: 193 Thanks: 1 Thanked 0 Times in 0 Posts	A quick update. The car was driven down to London and then Sheffield (without Reverse) with no issues what so ever, purred along. This morning 'EP' on the dash and the autobox seems reticent to change up, or rather the engine is under powered. Have left it a while and will go and check again. I think the car is about to take a trick back to the garage who last worked on it, but obviously my milage may vary with a 'it broke whilst in your care, you fix it approach!' attitude. John

22nd January 2018, 19:05	#78
beinet1 Posted a thing or two Rover 75 2.0 V6 Auto Join Date: May 2011 Location: Sandnes - Norway Posts: 1,560 Thanks: 64 Thanked 283 Times in 174 Posts	Have just restored the images in this old thread. Might still be useful for the future

26th January 2018, 00:13	#79
Comfortably Numb Posted a thing or two Rover 75 Saloon Join Date: Dec 2017 Location: Penrith Posts: 1,336 Thanks: 165 Thanked 303 Times in 241 Posts	Fascinating thread! Anyone who dares to strip and repair an autobox at home gets my vote! Every manual I have ever read says "for autobox repairs - take it to a specialist. This work is beyond the scope of this manual and requires special equipment." or similar. No longer will I regard autoboxes as the work of conjurors and magicians, thanks to you, Einar.