Welcome to the GMTC - Chevy Truck Forum.
Chevy Truck Forum

GM Truck Club is the premier Chevy Truck Forum & GMC Truck Forum online ~ Since 2004.
Registered Users do not see the above ads. Register Today ~ It's Free and gives access to the whole website.
+ Reply to Thread
Results 1 to 5 of 5
  1. 02-11-2008, 07:27 PM #1
    TrailFiend
    TrailFiend is offline
    Sr. Apprentice TrailFiend is a glorious beacon of light
    TrailFiend's Avatar
    Join Date
    Nov 2007
    Location
    Las Vegas, NV
    Posts
    50
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Lightbulb 4x4 differential fluid change??

    im going to have my fluid changed tommorow morning, but i dont know if i should use friction modifier or not. i have the g80 rear-end which calls for 80-90w. im not using synthetic oil, so i need to know if i need friction modifier or not? thanks.
    Reply With Quote Reply With Quote
  2. 02-11-2008, 09:26 PM #2
    cao88c
    cao88c is offline
    Jr. Mechanic cao88c is a name known to all
    cao88c's Avatar
    Join Date
    Sep 2007
    Location
    AlachuA
    Posts
    82
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default

    Friction modifiers are generally used for lockers/ limited slip diffs. If you're running an open carrier, you should not need it. Check the FSM to see if it calls for it. Also, if you use Royal purple diff fluid, it already has it.
    1972 chevy p/u - 454 engine - work in progress
    1999 'burb - wife's vehicle
    1976 Jeep CJ5- Dana 60 front and rear, locked, 350 engine, GM 3 spd, Atlas II T/C, 8" lift on 38's
    2003 Jeep TJ- Dana 44 rear Dana 30 front, ox lockers front and rear 3.5" lift on 33's - My DD

    J.E.E.P.-------->
    Just
    Empty
    Every
    Pocket
    Reply With Quote Reply With Quote
  3. 02-11-2008, 09:40 PM #3
    95CTburb19
    95CTburb19 is offline
    Legend 95CTburb19 is a glorious beacon of light
    95CTburb19's Avatar
    Join Date
    Apr 2007
    Location
    Umass / Newtown CT
    Posts
    1,537
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default

    I think that you should put it in seeing as the G80 is a limited slip locker.
    Dan
    1999 GMC Sierra 2500 350 vortec
    1967 Jeep M725 ambulance 230 tornado
    1990 Cherokee Limited- 3 inch lift on 33's
    ...and every one of em has issues

    If you have any questions or problems don't hesitate to send me or any other GMTC moderators a PM
    Reply With Quote Reply With Quote
  4. 02-11-2008, 10:18 PM #4
    Pete95Sierra
    Pete95Sierra is offline
    Legend
    Pete95Sierra is a name known to all
    Pete95Sierra's Avatar
    Join Date
    Jan 2008
    Location
    Morristown, NJ
    Posts
    2,935
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default

    yea it cant hurt to put it in i use it in my truck and i use it in all the trucks i use at work ( which are all fords :( )
    PETE
    95 GMC Sierra 2500
    3" Body Lift, 33" Goodyear MTR's
    5.7L 350 TBI Edelbrock SDT Exhaust, Flowtech Headers, K&N Intake
    Sold :(
    1999 Jeep Cherokee, 3" Rustys lift, 33" BFG MT's, locked, armored: Rolled :(
    2000 Jeep Grand Cherokee Limited. K&N Intake, Custom Kolak Exhaust


    Contact this GMTC Moderator for any problems or questions you may have

    Join the GMTC Facebook Group!!! Join Here
    Reply With Quote Reply With Quote
  5. 02-14-2008, 11:56 AM #5
    TrailFiend
    TrailFiend is offline
    Sr. Apprentice TrailFiend is a glorious beacon of light
    TrailFiend's Avatar
    Join Date
    Nov 2007
    Location
    Las Vegas, NV
    Posts
    50
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default

    well, i put it in and it feels way better than it did before...it hadnt been changed in 116k miles!!! im so glad to have saved this truck from a bad owner. i had both diffs. and the transfer case changed. i cant wait to order my eaton e-locker and put that in, which i will then put synthetic oil in there. i got to see my g80... what a joke! lol
    Reply With Quote Reply With Quote

 
« Previous Thread | Next Thread »

Similar Threads

  1. trans fluid change
    By jarratt11 in forum Powertrain
    Replies: 7
    Last Post: 12-18-2009, 06:40 AM
  2. Transmission Fluid Change
    By makthenif in forum Chevy Suburban Forum (GMC Yukon XL)
    Replies: 25
    Last Post: 09-11-2009, 06:47 PM
  3. Should I add some fluid to my differential?
    By ibmoses in forum Powertrain
    Replies: 18
    Last Post: 08-30-2009, 05:19 AM
  4. trans. fluid change
    By cwm921 in forum Powertrain
    Replies: 14
    Last Post: 03-05-2009, 10:45 AM
  5. Differential Fluid Change
    By makthenif in forum Chevy Suburban Forum (GMC Yukon XL)
    Replies: 7
    Last Post: 09-21-2007, 05:08 PM

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts

Forum Rules

Powered by vBulletin® Version 4.1.7
Copyright © 2012 vBulletin Solutions, Inc. All rights reserved.
Copyright 2004-2011. This site is for entertainment purposes only and is not associated with General Motors.
All times are GMT -5. The time now is 06:36 AM.
vBulletin 4.0 skin by CompleteVB