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  • 1996 - 2004 SN95 Mustang -General/Talk-
  • SN95 4.6L Mustang Tech

new gears..change fluid?

  • Thread starter Thread starter 03s281sc
  • Start date Start date Oct 25, 2006

03s281sc

New Member
Mar 31, 2005
245
0
0
maryland
Oct 25, 2006
#1
  • Oct 25, 2006
  • #1
after getting a fresh set of gears put in, should you change the fluid after so many miles..i never hear of anyone doing it from the factory so should you do it after a new set is put in???
 
P

Pennywise2

Banned
May 16, 2006
1,379
1
0
Oct 25, 2006
#2
  • Oct 25, 2006
  • #2
People forget that after your new ring and pinion breaks in
it leaves small peices of metal in your differential fluid and on
your magnetic rear end drain plug their will be very small peices
of metal on the magnetic part of the rear end drain plug.
I would change it with some Royal Purple gear oil.
I belive that 75W140 gear oil is what to use in your rear end.
 
K

Kilgore Trout

Fried or Broiled ?
10 Year Member
Mar 30, 2005
4,749
95
134
Oct 25, 2006
#3
  • Oct 25, 2006
  • #3
Nah, the fill plug has a magnet. Don't bother changing the fluid unless you are bored.
 

Bolt on 5.0

Founding Member
Jun 26, 2002
302
0
17
Suffolk, NY
Oct 25, 2006
#4
  • Oct 25, 2006
  • #4
It cannot hurt to change but you dont need to. Look at your ownes manual and change the fluid at the intervals recomended by them. Also if you do change the fluid you might have to add some friction modifier to it. I know the 99's call for it.
 

BlackenedSVT

Active Member
Jan 18, 2004
1,841
7
38
New Jersey
Oct 25, 2006
#5
  • Oct 25, 2006
  • #5
Pennywise2 said:
People forget that after your new ring and pinion breaks in
it leaves small peices of metal in your differential fluid and on
your magnetic rear end drain plug their will be very small peices
of metal on the magnetic part of the rear end drain plug.
I would change it with some Royal Purple gear oil.
I belive that 75W140 gear oil is what to use in your rear end.
Click to expand...


When you buy a new car straight off the lot....do they tell you to come in 500 miles later and have the rear end oil change?

didn't think so


Don't worry about changing the gear oil after a gear install. HOWEVER you should change the gear oil every 20k miles if you want your clutch pack in the rear to stay in good standing
 

04GTMustang

New Member
Feb 28, 2006
348
0
0
Stafford
Oct 25, 2006
#6
  • Oct 25, 2006
  • #6
id say change it anyways while ur in there cause you will just have to do it later down the road
 
K

Kilgore Trout

Fried or Broiled ?
10 Year Member
Mar 30, 2005
4,749
95
134
Oct 25, 2006
#7
  • Oct 25, 2006
  • #7
What do you mean "while ur in there"?

He is not in there, the job is done.
 

03s281sc

New Member
Mar 31, 2005
245
0
0
maryland
Oct 25, 2006
#8
  • Oct 25, 2006
  • #8
i was just askin cuz i bought royal purple but if im gonna change it after the install i'll buy sumthin a lil cheaper then put the r.p. if i were 2 change afterwards
 

Henceforward

The Avatar Master
Founding Member
Jul 17, 2001
485
0
0
Oct 25, 2006
#9
  • Oct 25, 2006
  • #9
I have Amsoil 75W-90 Gear Oil and Traction Additive right now.
 

CobraRed_96_GT

Active Member
May 20, 2006
1,421
4
39
UCSD/La Jolla
Oct 25, 2006
#10
  • Oct 25, 2006
  • #10
dealer recomends that your rear diff oil be changed after 110k miles....... i think your fine for now
 
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