tranny and rear end fluid questions

2000stangGT · April 18th, 2007, 03:17 PM

ok im at 50k, i bought my stang used, dont know if either fluids have ever been changed. i want it done for the spring, summer.
ive heard any synthetic for the tranny but what about the rear? and also is friction modifier necessary. ive heard so many different things.from yes,no and no if i use synthetic. whats the truth?
thanks
matt

HMUSN · April 18th, 2007, 03:24 PM

use royal purple and the friction modifier.

try a tight turn without friction modifier in your car and you can bet your ass end will jump about 3 feet when those gears start to pop

White99stang · April 18th, 2007, 05:34 PM

i would not put synthetic in the rear.

acmillr · April 18th, 2007, 05:41 PM

I use Lucas synthetic only in the rear. It is the only thing I have found that doesn't eventually cause binding.

zkid01 · April 18th, 2007, 07:12 PM

Lucas is a great oil for rearends.. I have some redline race oil in mine. And i have seen good results with royal purple in the tranny.

2000stangGT · April 18th, 2007, 07:20 PM

the friction modifier is only needed in the read end right? not in the tranny fluid correct?

acmillr · April 18th, 2007, 08:49 PM

I don't use any friction modifier

MustangMatt96GT · April 18th, 2007, 09:23 PM

Yeah the the friction modifier is only needed in the rearend! And for the money it costs it is not a waste!!

ATLmustang · April 18th, 2007, 09:26 PM

the mobil 1 75-140 has a modifier in it. and states that no other friction modifier is needed. thats what it said on their website.

WAR-PARTY · April 18th, 2007, 09:26 PM

I vote for Royal Purple, that's what I have used

zkid01 · April 19th, 2007, 08:58 AM

Alot of the better brand rear end oils have the modifier already in it. So dont add more.. this can actually cause problems.. haha and dont put any in the tranny...

commpartspro · April 20th, 2007, 09:48 PM

i use amsoil full synthetic in all my cars fluid areas...no probs!

April 18th, 2007, 03:17 PM	#1
2000stangGT Enthusiast 2000 Mustang Gt 13.56 @ 106 Join Date: Jun 2006 Location: CT Posts: 806 iTrader: 0 reviews	tranny and rear end fluid questions ok im at 50k, i bought my stang used, dont know if either fluids have ever been changed. i want it done for the spring, summer. ive heard any synthetic for the tranny but what about the rear? and also is friction modifier necessary. ive heard so many different things.from yes,no and no if i use synthetic. whats the truth? thanks matt __________________ JLT - Accufab - MPH Heads - VT Stage 2 N/A cams Manley Valves/Springs - Centerforce Dual Friction BBK LT's - BBK o/r H - Bassani catback FRPP 4.10s - XCAL2 - BBK UDP's 306rwhp/333rwtq

April 18th, 2007, 03:24 PM	#2
HMUSN Doc 1986 SVO 48.47@ 12.58 Join Date: Nov 2006 Posts: 37,050 iTrader: 11 reviews	use royal purple and the friction modifier. try a tight turn without friction modifier in your car and you can bet your ass end will jump about 3 feet when those gears start to pop __________________

April 18th, 2007, 05:34 PM	#3
White99stang MM's nicest mod, :) Join Date: Aug 2005 Location: Apex, NC Posts: 3,771 iTrader: 0 reviews	i would not put synthetic in the rear. __________________ 06 Dodge MegaCab Diesel 455rwhp/815rwtq REAL TRUCKS DON'T USE SPARK PLUGS

April 18th, 2007, 05:41 PM	#4
acmillr MM's Mad Scientist Slow Fella Join Date: Jul 2006 Location: Tupelo, MS Posts: 5,111 iTrader: 2 reviews	I use Lucas synthetic only in the rear. It is the only thing I have found that doesn't eventually cause binding. __________________

April 18th, 2007, 07:12 PM	#5
zkid01 Enthusiast Join Date: Apr 2007 Location: Pearl Harbor, HI Posts: 606 iTrader: 0 reviews	Lucas is a great oil for rearends.. I have some redline race oil in mine. And i have seen good results with royal purple in the tranny. __________________ Work Hard....Play Harder.

April 18th, 2007, 07:20 PM	#6
2000stangGT Enthusiast 2000 Mustang Gt 13.56 @ 106 Join Date: Jun 2006 Location: CT Posts: 806 iTrader: 0 reviews	the friction modifier is only needed in the read end right? not in the tranny fluid correct? __________________ JLT - Accufab - MPH Heads - VT Stage 2 N/A cams Manley Valves/Springs - Centerforce Dual Friction BBK LT's - BBK o/r H - Bassani catback FRPP 4.10s - XCAL2 - BBK UDP's 306rwhp/333rwtq

April 18th, 2007, 08:49 PM	#7
acmillr MM's Mad Scientist Slow Fella Join Date: Jul 2006 Location: Tupelo, MS Posts: 5,111 iTrader: 2 reviews	I don't use any friction modifier __________________

April 18th, 2007, 09:23 PM	#8
MustangMatt96GT Proud American 1996 Mustang GT Join Date: Dec 2006 Location: Lakewood, CO Posts: 10,690 iTrader: 3 reviews	Yeah the the friction modifier is only needed in the rearend! And for the money it costs it is not a waste!! __________________ RIP Travis Billings Special Thanks to: Andrews Racing Transmissions Baseline Suspensions 25.3 SFI Chassis Build Never Lift Racecars

April 18th, 2007, 09:26 PM	#9
ATLmustang Regular Join Date: Dec 2006 Location: Buford,GA Posts: 336 iTrader: 0 reviews	the mobil 1 75-140 has a modifier in it. and states that no other friction modifier is needed. thats what it said on their website.

April 18th, 2007, 09:26 PM	#10
WAR-PARTY Hardcore Enthusiast 2001 YUGO GT Join Date: Aug 2006 Location: GOAT LOCKER PENSACOLA FL Posts: 1,700 Blog Entries: 1 iTrader: 0 reviews	I vote for Royal Purple, that's what I have used __________________ How I met my wife! Our first date...

April 19th, 2007, 08:58 AM	#11
zkid01 Enthusiast Join Date: Apr 2007 Location: Pearl Harbor, HI Posts: 606 iTrader: 0 reviews	Alot of the better brand rear end oils have the modifier already in it. So dont add more.. this can actually cause problems.. haha and dont put any in the tranny... __________________ Work Hard....Play Harder.

April 20th, 2007, 09:48 PM	#12
commpartspro Newbie Join Date: Mar 2007 Posts: 35 iTrader: 0 reviews	i use amsoil full synthetic in all my cars fluid areas...no probs! __________________ 04 mach 1

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