Go Back   The 75 and ZT Owners Club Forums > The 75 and ZT Owners Club Forums > Technical Help Forum
Register FAQ Image Gallery Members List Calendar Mark Forums Read
Notices

Reply
 
Thread Tools Display Modes
Old 29th April 2024, 09:35   #11
The Rovering Member
I really should get out more.......
 
The Rovering Member's Avatar
 
Rover 75 saloon

Join Date: Feb 2014
Location: London
Posts: 2,967
Thanks: 263
Thanked 538 Times in 431 Posts
Default

There is a school of thought that says if a reasonably high mileage autobox has never had a fluid change then it's best to leave it as all the worn friction material is suspended in the fluid & compensating for the actual wear on the components it has come from. Removing it & putting fresh slippery fluid in is likely to allow the worn components to make themselves apparent. Regular fluid changes will of course reduce the wear to a minimum.

I have the same dilemma with our Chrysler Voyager. Nearly 150,000 miles & no problems with the six-speed autobox but there's a chance that the fluid
hasn't been changed.
__________________
Reducing the size of my Rover fleet by adding a 75 to it.

The Rovering Member is offline   Reply With Quote
Old 29th April 2024, 09:36   #12
The Rovering Member
I really should get out more.......
 
The Rovering Member's Avatar
 
Rover 75 saloon

Join Date: Feb 2014
Location: London
Posts: 2,967
Thanks: 263
Thanked 538 Times in 431 Posts
Default

There is a school of thought that says if a reasonably high mileage autobox has never had a fluid change then it's best to leave it as all the worn friction material is suspended in the fluid & compensating for the actual wear on the components it has come from. Removing it & putting fresh slippery fluid in is likely to allow the worn components to make themselves immediately apparent. Regular fluid changes will of course reduce the wear to a minimum.

I have the same dilemma with our Chrysler Voyager. Nearly 150,000 miles & no problems with the six-speed autobox as yet but there's a chance that the fluid
hasn't been changed.
__________________
Reducing the size of my Rover fleet by adding a 75 to it.

The Rovering Member is offline   Reply With Quote
Old 29th April 2024, 10:10   #13
xsport
Posted a thing or two
 
rover 75 club se

Join Date: Apr 2011
Location: Leicester
Posts: 1,741
Thanks: 358
Thanked 419 Times in 310 Posts
Default

I am not sure if the autobox is designed to do this as a normal function, program wise. If you are going down hill on the over run, i notice on my car that it will drop down a gear braking or not, but as it does this the revs do increase before dropping down . This i would imagine is to up the revs to accomodate the lower gearing. I know that there is a time delay whilst braking before this actuates in seconds , but im not sure with a manual change. Sometimes these boxes do get into a pickle program wise now and then,as they try to memorise driving style . If things seem ok now , then maybe the box has "learned "....
xsport is offline   Reply With Quote
Old 29th April 2024, 10:16   #14
goltho
Can't help myself
 
goltho's Avatar
 
Rover 75 CDTi 2005

Join Date: Jan 2018
Location: Lincoln
Posts: 884
Thanks: 469
Thanked 150 Times in 113 Posts
Default

Quote:
Originally Posted by xsport View Post
I am not sure if the autobox is designed to do this as a normal function, program wise. If you are going down hill on the over run, i notice on my car that it will drop down a gear braking or not, but as it does this the revs do increase before dropping down . This i would imagine is to up the revs to accomodate the lower gearing. I know that there is a time delay whilst braking before this actuates in seconds , but im not sure with a manual change. Sometimes these boxes do get into a pickle program wise now and then,as they try to memorise driving style . If things seem ok now , then maybe the box has "learned "....
It's definitely not the retard function which activates when the vehicle's in D on overrun and the speed increases. It's a couple of seconds after I shift down from D to 4 after the lower gear engages. It's a momentary jump or slip when it lets go and then re-engages.

Dougie.
goltho is offline   Reply With Quote
Old 29th April 2024, 10:25   #15
xsport
Posted a thing or two
 
rover 75 club se

Join Date: Apr 2011
Location: Leicester
Posts: 1,741
Thanks: 358
Thanked 419 Times in 310 Posts
Default

Have you done the fluid change yet ..
xsport is offline   Reply With Quote
Old 29th April 2024, 10:27   #16
goltho
Can't help myself
 
goltho's Avatar
 
Rover 75 CDTi 2005

Join Date: Jan 2018
Location: Lincoln
Posts: 884
Thanks: 469
Thanked 150 Times in 113 Posts
Default

Quote:
Originally Posted by xsport View Post
Have you done the fluid change yet ..
Oi! Give's half a chance, Guvnor!!

("Retirement" currently is consisting of re-doing house guttering, building a large garden shed and installing an armoured supply + garden lighting, all at daughter #3's gaff. What's your excuse....?)

Last edited by goltho; 29th April 2024 at 10:30..
goltho is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT. The time now is 11:51.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright © 2006-2023, The Rover 75 & MG ZT Owners Club Ltd