Autobox lost gears - Page 2

Grandad Steve · 28th September 2018, 21:08

Could be part of the solenoid pack is playing up, there are filters in the labyrinth which could be blocked. If the gearbox works for a short while, the symptoms point to fluid starvation. If the fluid that's in there is dark and stinky, it indicates a slipping clutch burning, again could be due to a fluid pressure drop, a cracked reverse piston will cause a pressure drop also, and will affect forward gears. This is under the first cover on the box and is very easy to change, with the gearbox in place, careful reassembly is necessary though.

gozo ken · 29th September 2018, 08:30

Hi Steve,
thank you for your input,I take it the filters are behind the solenoid cover at the front?
Am I able to physically see or check to see if they are blocked,or even blow through them or are they in a section that just needs replacing?
As far as I can make out,the reverse piston is behind the side cover.
The other thing is if I have to change the worn clutch plates ,is this a' box out'
job?
Ken.

SD1too · 29th September 2018, 11:47

Ken; don’t allow yourself to be distracted from the most likely cause matching your symptoms: failure of the reverse piston.
There is only one filter in the JATCO and it is only accessible after major dismantling. It’s not a routinely replaceable item and doesn’t normally cause problems.
You won’t have worn clutch plates either.

Simon

Mike Noc · 29th September 2018, 12:07

Hope it is Simon - a relatively easy job that can be carried out with the gearbox still in the car.

gozo ken · 29th September 2018, 13:34

Hi Simon,mike,
It's what I was thinking,but you can get distracted onto other things,when you haven't tackled this job before...I'm used to 'manuals' apart from my BW35 that is....so after doing a pin check,where all resistances were within tolerances ,I'm going to have a look at 'said reverse piston' and see where we go from there,
Meanwhile just been exercising my BW35 and had lunch at the seaside..
Thank you for your experienced help.
Ken

Mike Noc · 29th September 2018, 15:11

That's the spirit Ken - if in doubt chill out.

I think there are a couple of 'how to's', here is one of them:

https://the75andztclub.co.uk/forum/s...reverse+piston

SD1too · 29th September 2018, 16:24

Quote:

Originally Posted by gozo ken

I'm used to 'manuals' ...

An ATSG repair manual for the JATCO is available from a company in the UK (I have one).

Quote:

Meanwhile just been exercising my BW35 ...

Oh come on Ken, stop teasing us! What is your other car then?

Simon

gozo ken · 29th September 2018, 21:30

I like the play on words,the English language is great isn't it,,''manual box''as apposed to a book,
The BW35 is in a Staaag as J Clarkson referred to it.

Mike Noc · 29th September 2018, 23:19

Had one back in the day - lovely mustard colour.

gozo ken · 1st October 2018, 08:49

I had an orange(pimento) one in the mid 90s,this one's royal blue.

Getting back to the Rover---the reverse piston --the top has totally sheared off,can't see this in any other references on the internet,,but shall order the 're-enforced' one and see how it goes,
Ken.

29th September 2018, 11:47	#13
SD1too Doesn't do things by halves Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model. Join Date: Mar 2007 Location: Former Middlesex Posts: 20,344 Thanks: 1,587 Thanked 3,749 Times in 3,181 Posts	Ken; don’t allow yourself to be distracted from the most likely cause matching your symptoms: failure of the reverse piston. There is only one filter in the JATCO and it is only accessible after major dismantling. It’s not a routinely replaceable item and doesn’t normally cause problems. You won’t have worn clutch plates either. Simon __________________ "Whatever is rightly done, however humble, is noble." Sir Henry Royce.

28th September 2018, 21:08	#11
Grandad Steve Newbie Rover 75 Saloon Join Date: Jun 2016 Location: Guyhirn Posts: 14 Thanks: 2 Thanked 7 Times in 1 Post	Could be part of the solenoid pack is playing up, there are filters in the labyrinth which could be blocked. If the gearbox works for a short while, the symptoms point to fluid starvation. If the fluid that's in there is dark and stinky, it indicates a slipping clutch burning, again could be due to a fluid pressure drop, a cracked reverse piston will cause a pressure drop also, and will affect forward gears. This is under the first cover on the box and is very easy to change, with the gearbox in place, careful reassembly is necessary though.

29th September 2018, 08:30	#12
gozo ken Avid contributor R75 SALOON Join Date: Feb 2013 Location: Lincolnshire Posts: 226 Thanks: 20 Thanked 57 Times in 44 Posts	Hi Steve, thank you for your input,I take it the filters are behind the solenoid cover at the front? Am I able to physically see or check to see if they are blocked,or even blow through them or are they in a section that just needs replacing? As far as I can make out,the reverse piston is behind the side cover. The other thing is if I have to change the worn clutch plates ,is this a' box out' job? Ken.

29th September 2018, 12:07	#14
Mike Noc This is my second home Rover 75 CDT Manual Connoisseur SE, Rover 75 CDT Automatic Connoisseur SE & a Freelander Td4. Join Date: Jul 2009 Location: Hampshire Posts: 11,547 Thanks: 3,470 Thanked 3,119 Times in 2,247 Posts	Hope it is Simon - a relatively easy job that can be carried out with the gearbox still in the car.

29th September 2018, 13:34	#15
gozo ken Avid contributor R75 SALOON Join Date: Feb 2013 Location: Lincolnshire Posts: 226 Thanks: 20 Thanked 57 Times in 44 Posts	Hi Simon,mike, It's what I was thinking,but you can get distracted onto other things,when you haven't tackled this job before...I'm used to 'manuals' apart from my BW35 that is....so after doing a pin check,where all resistances were within tolerances ,I'm going to have a look at 'said reverse piston' and see where we go from there, Meanwhile just been exercising my BW35 and had lunch at the seaside.. Thank you for your experienced help. Ken

29th September 2018, 15:11	#16
Mike Noc This is my second home Rover 75 CDT Manual Connoisseur SE, Rover 75 CDT Automatic Connoisseur SE & a Freelander Td4. Join Date: Jul 2009 Location: Hampshire Posts: 11,547 Thanks: 3,470 Thanked 3,119 Times in 2,247 Posts	That's the spirit Ken - if in doubt chill out. I think there are a couple of 'how to's', here is one of them: https://the75andztclub.co.uk/forum/s...reverse+piston

29th September 2018, 21:30	#18
gozo ken Avid contributor R75 SALOON Join Date: Feb 2013 Location: Lincolnshire Posts: 226 Thanks: 20 Thanked 57 Times in 44 Posts	I like the play on words,the English language is great isn't it,,''manual box''as apposed to a book, The BW35 is in a Staaag as J Clarkson referred to it.

29th September 2018, 23:19	#19
Mike Noc This is my second home Rover 75 CDT Manual Connoisseur SE, Rover 75 CDT Automatic Connoisseur SE & a Freelander Td4. Join Date: Jul 2009 Location: Hampshire Posts: 11,547 Thanks: 3,470 Thanked 3,119 Times in 2,247 Posts	Had one back in the day - lovely mustard colour.

1st October 2018, 08:49	#20
gozo ken Avid contributor R75 SALOON Join Date: Feb 2013 Location: Lincolnshire Posts: 226 Thanks: 20 Thanked 57 Times in 44 Posts	I had an orange(pimento) one in the mid 90s,this one's royal blue. Getting back to the Rover---the reverse piston --the top has totally sheared off,can't see this in any other references on the internet,,but shall order the 're-enforced' one and see how it goes, Ken.