Omega Owners Forum

Please login or register.

Login with username, password and session length
Advanced search  

News:

Welcome to OOF

Pages: [1] 2 3  All   Go Down

Author Topic: Diff questions  (Read 9805 times)

0 Members and 2 Guests are viewing this topic.

Latchie_3.0v6

  • Junior Member
  • **
  • Offline Offline
  • Gender: Male
  • OMAGH N.IRELAND
  • Posts: 178
    • Omega 3.0 v6 elite (sold)
    • View Profile
Diff questions
« on: 29 February 2012, 13:13:13 »
Going to look at a LSD out of a 98 mv6 on Saturday.
Will this fit my car 99 elite
How can I tell if it is a LSD not just welded.
What would be best diff oil to use
Think that's bout it, but if anyone has any other thing I should look for just let me know

Cheers
Logged
The only way forward is sideways

cem_devecioglu

  • Guest
Re: Diff questions
« Reply #1 on: 29 February 2012, 13:17:53 »
 best oil question : factory spec, ep80 grade oil but too thick especially in winter .. so 75W90 is recommended..

got the question wrong  its for gearbox, for differential EP 90 or ep140 depending on climate..

 
Logged

Kevin Wood

  • Global Moderator
  • *****
  • Offline Offline
  • Gender: Male
  • Alton, Hampshire
  • Posts: 36496
    • Jaguar XE 25t, Westfield
    • View Profile
Re: Diff questions
« Reply #2 on: 29 February 2012, 13:18:14 »
If it's an LSD you will see two planetary gear shafts at 90 degrees, if you look into the hole where the driveshafts locate. Open diffs have just a single shaft.

If it's welded, you won't be able to turn the driveshafts individually. If it's an open diff, this will be possible. If it's an LSD, it might be stiff to turn one wheel independently of the other, but should be possible.

BOA90LS is a common recommendation for the oil.
Logged
Tech2 services currently available. See TheBoy's price list: http://theboy.omegaowners.com/

Kevin Wood

  • Global Moderator
  • *****
  • Offline Offline
  • Gender: Male
  • Alton, Hampshire
  • Posts: 36496
    • Jaguar XE 25t, Westfield
    • View Profile
Re: Diff questions
« Reply #3 on: 29 February 2012, 13:22:18 »
Quote from: cem on 29 February 2012, 13:17:53
best oil question :  factory spec, ep80 grade oil but too thick especially in winter .. so 75W90 is recommended..

My understanding is that EP oils are not necessarily compatible with plate LSDs. You need an oil with an "LS" suffix which will have the correct friction modifiers and won't contaminate the clutch plates.
Logged
Tech2 services currently available. See TheBoy's price list: http://theboy.omegaowners.com/

cem_devecioglu

  • Guest
Re: Diff questions
« Reply #4 on: 29 February 2012, 13:27:36 »
Quote from: Kevin Wood on 29 February 2012, 13:22:18
Quote from: cem on 29 February 2012, 13:17:53
best oil question :  factory spec, ep80 grade oil but too thick especially in winter .. so 75W90 is recommended..

My understanding is that EP oils are not necessarily compatible with plate LSDs. You need an oil with an "LS" suffix which will have the correct friction modifiers and won't contaminate the clutch plates.

dont know about contamination but  a quick search brings too many ep 90  or ep140 type oils for lsd

http://ebookbrowse.com/ep-90-gl5-limited-slip-msds-2-pdf-d107846895
Logged

Marks DTM Calib

  • Administrator
  • *****
  • Offline Offline
  • Gender: Male
  • West Bridgford
  • Posts: 34104
  • Git!
    • View Profile
Re: Diff questions
« Reply #5 on: 29 February 2012, 13:49:46 »
Omega LSD requires an EP90 with friction modifiers.

Original fit would have been EP90 with seperate additives (and this is what a dealer will supply) but LSD oils are available which have the friction modifiers already in and hence the recommendation of BOA90LS
Logged

zirk

  • Omega Queen
  • *****
  • Offline Offline
  • Gender: Male
  • Epping Forest
  • Posts: 11447
  • 3.2 Manual Special Saloon ReMapped and LPG'd and
    • 3.2 Manual Special Estate
    • View Profile
Re: Diff questions
« Reply #6 on: 29 February 2012, 13:56:42 »
Also worth checking what Diff Ratio your going to end up with, if its ex plod could be different, not to mention swapping between Manual  / Auto etc.

 ;)
Logged

cem_devecioglu

  • Guest
Re: Diff questions
« Reply #7 on: 29 February 2012, 14:00:19 »
I have checked the ep type lsd oils..

seems like they use a special type of EP modifiers and their sulphur content is non-active as fas as I understand..

"EP mineral gear oils are used more extensively in worm gears. Under conditions of high pressure and temperature, the EP (antiscuff) additive reacts with the metal surface to form a soft, slippery chemical layer which prevents severe wear and welding. Previously, there was a concern that sulfur-phosphorous EP additives would react with the bronze gear. However, new EP additive technology used by most of the major lubricant suppliers has reduced the corrosive attack by utilizing nonactive sulfur. EP lubricants work particularly well when shock loading occurs. EP gear oils also protect steel gears better than compounded gear oils. "

http://www.machinerylubrication.com/Read/169/worm-gear-lubrication

Logged

2woody

  • Omega Baron
  • *****
  • Offline Offline
  • Northumberland
  • Posts: 2374
    • View Profile
Re: Diff questions
« Reply #8 on: 29 February 2012, 15:54:49 »
it is the "hypoid" additive in most axle oils which poisons LSD plates.
Logged

Latchie_3.0v6

  • Junior Member
  • **
  • Offline Offline
  • Gender: Male
  • OMAGH N.IRELAND
  • Posts: 178
    • Omega 3.0 v6 elite (sold)
    • View Profile
Re: Diff questions
« Reply #9 on: 29 February 2012, 16:40:19 »
Thanks for all the quick answers. Just another Q how much oil does diff take or is there a marker on side or anything.
Logged
The only way forward is sideways

tigers_gonads

  • Omega Lord
  • *****
  • Offline Offline
  • Gender: Male
  • Kinston Upon Hull
  • Posts: 8616
  • Sill breathing
    • Audi A6 Allroad BiTd
    • View Profile
Re: Diff questions
« Reply #10 on: 29 February 2012, 18:38:45 »
I got just over 1 ltr in my standard dif plus a tube of additive
Logged

Latchie_3.0v6

  • Junior Member
  • **
  • Offline Offline
  • Gender: Male
  • OMAGH N.IRELAND
  • Posts: 178
    • Omega 3.0 v6 elite (sold)
    • View Profile
Re: Diff questions
« Reply #11 on: 04 March 2012, 16:23:45 »
Just fitted the LSD that I bought and it doesn't seem to lock, would there be any reason for this, I was thinking maybe low on oil
Logged
The only way forward is sideways

bootie

  • Senior Member
  • ****
  • Offline Offline
  • Gender: Male
  • Enix, Almeria, Spain
  • Posts: 541
    • View Profile
Re: Diff questions
« Reply #12 on: 04 March 2012, 16:28:48 »
When you say it doesn't seem to lock, what have you tried doing?

Best test is on gravel, plenty of revs then pop the clutch, should get a nice long 11, i.e. both rears spinning and leaving tracks.
Seeing where you live it might be easier to find some wet grass! LOL
Logged

Latchie_3.0v6

  • Junior Member
  • **
  • Offline Offline
  • Gender: Male
  • OMAGH N.IRELAND
  • Posts: 178
    • Omega 3.0 v6 elite (sold)
    • View Profile
Re: Diff questions
« Reply #13 on: 04 March 2012, 16:34:29 »
I tried doing a few donuts in a private place :P. Wheels only spun one wheel but I was told that unless diff in tightened it can take quite a bit to get diff to lock.
Logged
The only way forward is sideways

bootie

  • Senior Member
  • ****
  • Offline Offline
  • Gender: Male
  • Enix, Almeria, Spain
  • Posts: 541
    • View Profile
Re: Diff questions
« Reply #14 on: 04 March 2012, 16:43:08 »
I would do a straight line test rather than donuts, see if that gets the desired results.
As for 'tightening up' I'm afraid I have no knowledge of this, sorry.
Logged
Pages: [1] 2 3  All   Go Up
« previous next »
 

Page created in 0.011 seconds with 17 queries.