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 22nd June 2017, 15:46   #1
Animesis
Loves to post
 
Animesis's Avatar
 
Rover 75 saloon 2.0l Diesel Connoisseur

Join Date: Apr 2016
Location: Wokingham
Posts: 259
Thanks: 136
Thanked 21 Times in 15 Posts
Default Gearbox Autopsy

Some members may remember when I first got my Rover 75 I had issues with excessive movement in the driveshaft, and today I decided to remove the clutch housing (for use on a low mileage box with a damaged clutch housing) and poke around inside

Getting the housing off was not an easy job, and I would certainly say its easier to just swap the box, but not impossible to repair

You can see the state of the poor roller bearings





I found it kept me interested this afternoon anyhow
__________________
Gearbox change, clutch, subframe refurbish, handbrake mod, drumbrake repair, rear coils, plate PCB repair, sunroof drains refitted, trim leak fix, cruise control fix, cleared EGR/inlet, new strut bearings, USB sockets in rear ashtray, new front brake pipes/hoses, repaired undertray, new o/s rear upper arm, refurbished rear suspension&subframe, fixed back light leak, new exhaust, fitted HID xenons, FBH fix, new thermostat, armrest LEDs, wood dash, new hydromount, natnav, tyres, numberplates
Animesis is offline   Reply With Quote
Old 23rd June 2017, 19:11   #2
simondhopkins
Loves to post
 
simondhopkins's Avatar
 
Vauxhall Vectra C

Join Date: Jul 2016
Location: Burnley
Posts: 445
Thanks: 179
Thanked 88 Times in 62 Posts
Default


any idea what caused this?
simondhopkins is offline   Reply With Quote
Old 24th June 2017, 10:52   #3
T-Cut
This is my second home
 
Rover75 and Mreg Corsa.

Join Date: Nov 2006
Location: Sumweer onat mote o'dust (Sagin)
Posts: 21,751
Thanks: 341
Thanked 3,660 Times in 2,924 Posts
Default

Blimey - that's the pits!
Poor or wrong quality oil or a simple lack of?

Click: http://www.bardenbearings.com/remote...ages_de_en.pdf

TC

Last edited by T-Cut; 24th June 2017 at 10:56..
T-Cut is offline   Reply With Quote
Old 24th June 2017, 11:45   #4
FrenchMike
This is my second home
 
FrenchMike's Avatar
 
Rover 75 Saloon

Join Date: Aug 2007
Location: Avignon
Posts: 4,466
Thanks: 94
Thanked 661 Times in 554 Posts
Default

NORMAL FATIGUE is most plausible

Symptoms:
Often referred to as spalling, and indicated by
the fracture of the running surfaces and
subsequent removal of small discrete particles
of material from the inner ring, outer ring or
rolling elements. Spalling is progressive,
and once initiated will spread with continued
operation. It is always accompanied by
a noticeable increase in vibration.
Causes:
Overloading; excessive preload; tight inner
ring fits; bearing has remained in operation
beyond its calculated fatigue life.
Remedies:
Replace the bearing and/or consider....
FrenchMike is offline   Reply With Quote
Old 24th June 2017, 12:56   #5
Animesis
Loves to post
 
Animesis's Avatar
 
Rover 75 saloon 2.0l Diesel Connoisseur

Join Date: Apr 2016
Location: Wokingham
Posts: 259
Thanks: 136
Thanked 21 Times in 15 Posts
Default

No idea myself, got the car like it and was the first thing I changed over
__________________
Gearbox change, clutch, subframe refurbish, handbrake mod, drumbrake repair, rear coils, plate PCB repair, sunroof drains refitted, trim leak fix, cruise control fix, cleared EGR/inlet, new strut bearings, USB sockets in rear ashtray, new front brake pipes/hoses, repaired undertray, new o/s rear upper arm, refurbished rear suspension&subframe, fixed back light leak, new exhaust, fitted HID xenons, FBH fix, new thermostat, armrest LEDs, wood dash, new hydromount, natnav, tyres, numberplates
Animesis is offline   Reply With Quote
Old 24th June 2017, 13:29   #6
FrenchMike
This is my second home
 
FrenchMike's Avatar
 
Rover 75 Saloon

Join Date: Aug 2007
Location: Avignon
Posts: 4,466
Thanks: 94
Thanked 661 Times in 554 Posts
Default

I guess there was an horrible growling ?
FrenchMike is offline   Reply With Quote
Old 24th June 2017, 16:43   #7
Animesis
Loves to post
 
Animesis's Avatar
 
Rover 75 saloon 2.0l Diesel Connoisseur

Join Date: Apr 2016
Location: Wokingham
Posts: 259
Thanks: 136
Thanked 21 Times in 15 Posts
Default

I imagine so, but never heard it for the banging about of the driveshaft, droplinks, upper mounts, and worn hub (I probably could have found a better condition 75 if I had shopped around a bit more, (but it had all the bells and whistles)
The roads around here aren't great, coupled with an an infant school and primary school meaning loads of speed bumps means any small knocking on a car is more than rather noticeable here ^^;;
__________________
Gearbox change, clutch, subframe refurbish, handbrake mod, drumbrake repair, rear coils, plate PCB repair, sunroof drains refitted, trim leak fix, cruise control fix, cleared EGR/inlet, new strut bearings, USB sockets in rear ashtray, new front brake pipes/hoses, repaired undertray, new o/s rear upper arm, refurbished rear suspension&subframe, fixed back light leak, new exhaust, fitted HID xenons, FBH fix, new thermostat, armrest LEDs, wood dash, new hydromount, natnav, tyres, numberplates
Animesis is offline   Reply With Quote
Old 24th June 2017, 16:46   #8
Animesis
Loves to post
 
Animesis's Avatar
 
Rover 75 saloon 2.0l Diesel Connoisseur

Join Date: Apr 2016
Location: Wokingham
Posts: 259
Thanks: 136
Thanked 21 Times in 15 Posts
Default

On a side note if anyone is refurbishing a gearbox and needs any parts, apart from that bearing it seems in rather good condition and I'll be taking it to the scrappy in the future at some point, so just give me a shout and come and pick away at the remains
The diff parts alone are in the hundreds on rimmers
__________________
Gearbox change, clutch, subframe refurbish, handbrake mod, drumbrake repair, rear coils, plate PCB repair, sunroof drains refitted, trim leak fix, cruise control fix, cleared EGR/inlet, new strut bearings, USB sockets in rear ashtray, new front brake pipes/hoses, repaired undertray, new o/s rear upper arm, refurbished rear suspension&subframe, fixed back light leak, new exhaust, fitted HID xenons, FBH fix, new thermostat, armrest LEDs, wood dash, new hydromount, natnav, tyres, numberplates
Animesis is offline   Reply With Quote
Old 25th June 2017, 16:37   #9
kaiser
This is my second home
 
kaiser's Avatar
 
75 Tourer 2.5 Auto, 1.8T, 75V8ZT

Join Date: Jun 2007
Location: Johannesburg ZA
Posts: 6,200
Thanks: 1
Thanked 859 Times in 613 Posts
Default

Quote:
Originally Posted by FrenchMike View Post
NORMAL FATIGUE is most plausible
.
I doubt that.

if so this must come from an extreme mileage car, as this is not normal to my knowledge, even with high milers.
I think the most likely option is a problem with lubrication.
But it is a guess on my behalf.
__________________
Worth his V8 in gold
kaiser is offline   Reply With Quote
Old 26th June 2017, 12:47   #10
Animesis
Loves to post
 
Animesis's Avatar
 
Rover 75 saloon 2.0l Diesel Connoisseur

Join Date: Apr 2016
Location: Wokingham
Posts: 259
Thanks: 136
Thanked 21 Times in 15 Posts
Default

Dad was having a look at it today -so this is an ex REME engineers point of view- he reckons it could have been left without sufficient lubrication, got wet and then sat and rusted up. Next time the car moved, lots of crunching

The car was 175,000 miles with that gearbox when I swapped it out, so rather high but nothing extreme
__________________
Gearbox change, clutch, subframe refurbish, handbrake mod, drumbrake repair, rear coils, plate PCB repair, sunroof drains refitted, trim leak fix, cruise control fix, cleared EGR/inlet, new strut bearings, USB sockets in rear ashtray, new front brake pipes/hoses, repaired undertray, new o/s rear upper arm, refurbished rear suspension&subframe, fixed back light leak, new exhaust, fitted HID xenons, FBH fix, new thermostat, armrest LEDs, wood dash, new hydromount, natnav, tyres, numberplates
Animesis 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 17:02.


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