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February 4th, 2012, 11:49 AM
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#1 | |
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MM Fanatic
2003 Mustang GT
14.03@100
Join Date: Dec 2009
Location: Sacramento, CA
Posts: 3,067
 iTrader: 0 reviews
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Rear end oil and friction modifier questions
Ok so I'm coming up on my rear oil drain for my new gears, but I have a couple questions...
What weight should I use? I've seen both 75w90 and 75w140 being used. The car is mainly street/DD and some track. And... What oils do you recommend for use and which ones need friction modifier? I was thinking either Redline or Lucas. I've used Lucas before without friction modifier.
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February 4th, 2012, 11:57 AM
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#2 | |
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MM Fanatic
2000 Mustang GT 5spd
35.9@16.99
Join Date: Jun 2011
Location: Stephenville,tx
Posts: 4,395
iTrader: 17 reviews
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You don't need to drain oil after x miles of installing new gears.
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MODs: HP292 cams, LT's, o/r x, SLP LM1, 4.10,Mac cai, pro 5.0 more visual bs Blu rays for sale: http://www.moddedmustangs.com/forums...ps3-fs-ft.html
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February 4th, 2012, 12:43 PM
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#3 | |
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Jackpot, fishypoopypants!
2003 GT
1@3,000,000.... or is it 3,000,000@1?
Join Date: Apr 2011
Location: Toledo
Posts: 1,905
iTrader: 0 reviews
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Anyway, OP, I'd suggest royal purple. Theirs is a 75w90 and you don't need friction modifier. Of course, using Royal Purple is yet another thing that will be endlessly debated... |
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February 4th, 2012, 12:59 PM
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#4 |
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Hardcore Enthusiast
2002 mustang gt
Join Date: Jan 2010
Posts: 1,896
iTrader: 1 reviews
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Don't get anything that's stupid expensive when the cheaper fluids do the same thing, I agree that you don't need to drain the oil
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Rock stock 
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February 4th, 2012, 01:20 PM
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#5 |
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Banned from AFM member!
1999 Mustang 2v 4.6L
Join Date: Dec 2010
Location: Colorado Springs
Posts: 454
iTrader: 0 reviews
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Whether or not you really need friction modifier with gear oils that say they already contain friction modifier will also be endlessly debated.
FWIW... I used RP with Ford friction modifier.
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1999 2v 4.6L 380 RWHP/ 362 RWTQ, Tuned by Fastlane Motorsports Peace - That brief, glorious moment in history when everyone's standing around reloading. 
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February 4th, 2012, 01:29 PM
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#6 |
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I Post Entirely Way Too Much
2000 Mustang GT
12.73@111.36
Join Date: Aug 2007
Location: Shelbyville, IN
Posts: 5,312
 iTrader: 1 reviews
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I suppose we could endlessly debate what the owners manual says but my owners manual says to run Motorcraft SAE 80W-90 Premium Rear Axle Lubricant. You put the friction modifier in first then top it off with oil. But I agree with others who believe you don't need to replace the oil.
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ProCharger P-1SC, 9 psi, STD 396/383; Uncorrected 388/375; SAE 383/370 Mods list in Garage. |
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| Added friction modifier to my T45 | Nitmare67 | 99-04 | 16 | January 17th, 2012 12:50 AM |
| friction modifier | risingerj | V6 Mustangs | 5 | August 6th, 2009 09:37 AM |
| Gear Oil/ Friction Modifier | mounder27 | 99-04 | 6 | March 15th, 2009 02:55 PM |
| Friction Modifier | GTSilverBullit | 99-04 | 14 | September 21st, 2008 10:09 PM |
| Friction Modifier? | 4.6gtmarine | 99-04 | 2 | November 3rd, 2006 12:23 AM |
