• Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 1994 - 1995 Specific Tech

how to break in new rear end gears?

  • Thread starter Thread starter cb18201
  • Start date Start date Mar 12, 2004

cb18201

New Member
Oct 25, 2003
1,140
0
0
CT
Mar 12, 2004
#1
  • Mar 12, 2004
  • #1
how long should i wait to really get on my car with them? i got 4.30s, is there anything special i should do? thanks
 

zenboy99

Founding Member
May 12, 2002
2,212
0
47
Madison, WI
Mar 12, 2004
#2
  • Mar 12, 2004
  • #2
My Dad put in my gears, he's a senior/master technician for Ford. We just let the car idle on the hoist for awhile in gear, then I drove easy around the parking lot and easy on the highway for about 20 minutes.
 

cb18201

New Member
Oct 25, 2003
1,140
0
0
CT
Mar 12, 2004
#3
  • Mar 12, 2004
  • #3
zenboy99 said:
My Dad put in my gears, he's a senior/master technician for Ford. We just let the car idle on the hoist for awhile in gear, then I drove easy around the parking lot and easy on the highway for about 20 minutes.
Click to expand...

what gear ratio did u go with?
 

1105

I AM the random post master...bow down
May 3, 2003
3,841
0
0
Daytona Bch, FL
Mar 12, 2004
#4
  • Mar 12, 2004
  • #4
If you got the clutches replaced, I was told drive 50 miles at no more than 50mph then they will be broken in. If you didn't I heard theres no breakin period
 

zenboy99

Founding Member
May 12, 2002
2,212
0
47
Madison, WI
Mar 12, 2004
#5
  • Mar 12, 2004
  • #5
3.73

I've also heard there's no break in period, but it wouldn't hurt to take it easy for a little bit at first.
 

cb18201

New Member
Oct 25, 2003
1,140
0
0
CT
Mar 12, 2004
#6
  • Mar 12, 2004
  • #6
yeah i cant afford to mess anything up, although the place that did it for me is warrantying everything for me so if something did happen they fix it for free, which is good
 

Numbles

Active Member
Dec 10, 2003
998
0
36
Chicago, IL
Mar 12, 2004
#7
  • Mar 12, 2004
  • #7
4.30's

Someone's not worried about traction.

Go out and drop the hammer. Should be fine.
 

cb18201

New Member
Oct 25, 2003
1,140
0
0
CT
Mar 12, 2004
#8
  • Mar 12, 2004
  • #8
nah nothing some drag radials cant fix, of course im still gonna spin a little with them but once im done spinning ill be gone.
 

GTJake

Founding Member
Oct 28, 2002
3,049
0
56
Ann Arbor, MI
Mar 12, 2004
#9
  • Mar 12, 2004
  • #9
My scientific break-in procedure:

1. Make sure the car moves
2. Listen for any wierd sounds coming from the rear end
3. With no sounds present proceed to step four
4. Get on the freeway and blast up 110 speed shifting like a maniac

Hasn't let me down yet...

Jake
 

Joes95GT

New Member
Jan 23, 2003
3,132
1
0
Delaware
Mar 12, 2004
#10
  • Mar 12, 2004
  • #10
GTJake said:
My scientific break-in procedure:

1. Make sure the car moves
2. Listen for any wierd sounds coming from the rear end
3. With no sounds present proceed to step four
4. Get on the freeway and blast up 110 speed shifting like a maniac

Hasn't let me down yet...

Jake
Click to expand...
Jake knows well! Put the car in first gear. Make sure there is no whining or clunking sound while letting the clutch out. If not, shift second and try the same thing. If there are no noises in low RPM second, your fine. Go out and give it hell.

Joe
 

VibrantRedGT

"STANGNET'S PENGUIN SMACKER"
15 Year Member
Nov 29, 1999
14,679
424
154
Boca Raton, Florida
Mar 12, 2004
#11
  • Mar 12, 2004
  • #11
cb18201 said:
i got 4.30s, is there anything special i should do? thanks
Click to expand...

After backing up, proceed forward. While dead stopped, rev the car to 4,000 rpm. Lightly come off the clutch, when it's almost engaged floor it. When the RPM reaches 5,500 rpm, slam 2nd. Reach the desired length in second and bang 3rd. You should have went in distance about a 1000 feet. Look in rearview mirror and gaze upon 800 feet of smoke. Gears are broken in now. Enjoy.
 

cb18201

New Member
Oct 25, 2003
1,140
0
0
CT
Mar 13, 2004
#12
  • Mar 13, 2004
  • #12
thanks guys
 
B

Black70Fastback

New Member
Dec 14, 2003
319
0
0
Dyer, IN
Mar 13, 2004
#13
  • Mar 13, 2004
  • #13
yeah i probably didnt make it a quarter mile on my last set of gears before i wound it up as tight as i could and dumped the clutch. there really shouldnt be a break in. just maybe see if it makes funny noises on your way out the drive way. after that. HAMMER IT!
 

randomjoker

New Member
Sep 12, 2003
427
0
0
Oklahoma
Mar 14, 2004
#14
  • Mar 14, 2004
  • #14
GTJake said:
My scientific break-in procedure:

1. Make sure the car moves
2. Listen for any wierd sounds coming from the rear end
3. With no sounds present proceed to step four
4. Get on the freeway and blast up 110 speed shifting like a maniac

Hasn't let me down yet...

Jake
Click to expand...

 

5.0 from 95

Founding Member
Nov 6, 2001
738
0
0
Emory, TX
Mar 14, 2004
#15
  • Mar 14, 2004
  • #15
VibrantRedGT said:
After backing up, proceed forward. While dead stopped, rev the car to 4,000 rpm. Lightly come off the clutch, when it's almost engaged floor it. When the RPM reaches 5,500 rpm, slam 2nd. Reach the desired length in second and bang 3rd. You should have went in distance about a 1000 feet. Look in rearview mirror and gaze upon 800 feet of smoke. Gears are broken in now. Enjoy.
Click to expand...




Paul
 
You must log in or register to reply here.

Similar threads

R
Interior and Upholstery How to remove seatbelt torx screw
  • Riley Barth
  • Jul 6, 2026
  • Fox 5.0 Mustang Tech
  • 2
Replies
20
Views
392
Fox 5.0 Mustang Tech Jul 13, 2026
Noobz347
K
Drivetrain '87 5.0 Installing New Ring Gear and Pinion - Pattern Questions
  • karhoot
  • Apr 23, 2026
  • Fox 5.0 Mustang Tech
Replies
10
Views
386
Fox 5.0 Mustang Tech May 9, 2026
Mindseye007
Considering widening my rear wheels, would like to verify my thoughts on fitment
  • 2000xp8
  • Jul 9, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 2
Replies
20
Views
414
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Jul 15, 2026
FastDriver
Oil choice for after break in period.
  • Sask84gt
  • Feb 28, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 2
Replies
26
Views
1K
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Mar 14, 2026
Praetorious
P
F
5 lug disc brake pad help
  • Foxrider714
  • Nov 14, 2025
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
3
Views
241
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Nov 17, 2025
KRUISR
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 1994 - 1995 Specific Tech
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?