• Mustang Forums
  • 1965 - 1973 Classic Mustangs -General/Talk-

Rear main seal leak??

  • Thread starter Thread starter Twinmustangs
  • Start date Start date May 1, 2018
T

Twinmustangs

New Member
Apr 29, 2018
8
0
1
Rancho Cucamonga, Calif
May 1, 2018
#1
  • May 1, 2018
  • #1
I may have a rear main seal leak. Have any of you had any luck with additives like AT-205 stopping the leak? Also, can this job be done just by dropping the Trans, exhaust and starter? My son in law wants to pull the engine, I think that is over kill, who is right?
 

WORTH

20+ Year Stangneter
Nov 18, 2002
2,166
44
98
Cape Cod, Ma.
May 1, 2018
#2
  • May 1, 2018
  • #2
To be honest, it's probably easier to do it by pulling the engine. I've done them both ways. And it gives you a chance to do anything else you may want to do at the same time. everything is easy on an engine stand.

as for the additives, I don't put anything in my engines but OIL. I never had any luck with VooDoo.
 

65-Fstbk

15 Year Member
May 20, 2007
316
26
49
Vancouver, B.C. Canada
May 15, 2018
#3
  • May 15, 2018
  • #3
What type of motor is on the car? If it's factory 2 pc seal then I'm not sure but if the car has a later model 5.0 V8 such as something out of a Fox Mustang the rear main is a one piece and can be replaced in the car. Pull trans to access.
 
You must log in or register to reply here.

Similar threads

L
New here from Maine
  • lobster
  • Mar 2, 2026
  • 1965 - 1973 Classic Mustangs -General/Talk-
Replies
19
Views
528
1965 - 1973 Classic Mustangs -General/Talk- Mar 5, 2026
lobster
L
S
Drivetrain 8.8 Pinion and 302 rear main seal leaks after replacing. 93 5.0 with t-5
  • Steigy4827
  • Jun 23, 2025
  • Fox 5.0 Mustang Tech
Replies
10
Views
641
Fox 5.0 Mustang Tech Apr 1, 2026
Steigy4827
S
N
Edelbrock 1405 Setup
  • nathantaylor200
  • Nov 4, 2025
  • Classic Mustang Specific Tech
Replies
3
Views
221
Classic Mustang Specific Tech Nov 5, 2025
nathantaylor200
N
Engine New Oil Leak Help.
  • Slo5Oh89
  • Mar 14, 2025
  • Fox 5.0 Mustang Tech
Replies
8
Views
584
Fox 5.0 Mustang Tech Mar 19, 2025
Slo5Oh89
J
2004 Mustang 3.8L V6 vibrations above 65 MPH and differential leaks
  • joeybuddy96
  • Mar 16, 2026
  • SN95 V6 Mustang Tech
Replies
15
Views
505
SN95 V6 Mustang Tech Jun 28, 2026
joeybuddy96
J
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1965 - 1973 Classic Mustangs -General/Talk-
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?