friction modifiers for salisbury limited slip - BMW Forum - BimmerWerkz.com
3-Series (E46, E90) Chat relating to the BMW 3-Series from 1999 to Current. Models include: BMW 316i, BMW 318i, BMW 318Ci, BMW 320i, BMW 323i, BMW 325i, BMW 330i, BMW 328 Ci, BMW 328i, BMW 325i/xi, BMW 330Ci, BMW 320d, BMW 330d, BMW 335d.

 
LinkBack Thread Tools Display Modes
#1 (permalink) Old 03-12-2006, 05:41 PM
3rd Gear Member
 
Join Date: Aug 2003
Location: Baltimore MD
Posts: 729
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
peterkulesza is an unknown quantity at this point
(Thread Starter)
friction modifiers for salisbury limited slip

guys (zibby?):

what exactly do these friction modifiers do? my lsd runs three shims in the clutch packs. it makes a little grinding noises with redline 70/90 gear lube, which contains 5% of the modifiers. i knwo that these diffs are loud (i had one in a truck), and this one is pretty quiet overall.

is it reasonable to get it up to 7-8% (they sell the modifier solo)? if so, what exactly is the predicted effect?used:

peter
peterkulesza is offline  
Sponsored Links
Advertisement
 
#2 (permalink) Old 03-12-2006, 09:12 PM
2nd Gear Member
 
zibby's Avatar
 
Join Date: Dec 2004
Location: Vancouver, Canada
Posts: 507
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
zibby is an unknown quantity at this point
Hi Peter !

Hmm... long story short:Friction modifiers alter an oilís coefficient of friction. Typical friction modifiers include organic fatty acids and amides, high molecular weight organic phosphorus and phosphoric acid esters.Perhaps I am conservative regarding automotive oil products, but personally I would not use anything else in BMW cars differentials, than their original stuff(castrol SAF-XJ for limited slip and castrol SAF-XO for regular one)Those lubricant were developped by Castrol in cooperation with BMW for these cars and have special pakage added to its formulation.The reason these differs are loud or whining , because lots of people put in other stuff like Amsoil, Redline, etc...
Peter, remember never ever put 75w90 gear oil to limited slip differ,it calls for 75w140(as original fill) your rear end gonna be much quieter and you will get better performance from it.
Best regards:
Z.

BTW do not put any shit (modifiers) into differ , you will only make it worse !
zibby is offline  
#3 (permalink) Old 03-13-2006, 10:04 AM
3rd Gear Member
 
Join Date: Aug 2003
Location: Baltimore MD
Posts: 729
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
peterkulesza is an unknown quantity at this point
(Thread Starter)
done!
peterkulesza is offline  
Sponsored Links
Advertisement
 
Reply

  BMW Forum - BimmerWerkz.com > BMW Model Specific Forums > 3-Series (E46, E90)


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Limited Slip Diffs swanvesta 3-Series (E36) 12 06-15-2005 01:53 PM
Limited Slip Differential? Casey3561 3-Series (E36) 4 10-31-2004 11:54 AM
Limited Slip Differential Bmw1990 3-Series (E21, E30) 7 01-03-2004 09:02 PM
Limited Slip Differential (LSD) RallyE36 3-Series (E36) 3 12-26-2003 02:09 PM

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
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome