Sponsored

Rear diff leak

samih

Member
Joined
Jul 25, 2025
Threads
2
Messages
5
Reaction score
1
Location
Pennsylvania
First Name
Samih
Vehicle(s)
2021 Mustang gt
Is this just the pinion seal or also axle seals leaking? If it was just the pinion seal I’d expect it to not be coated that high up



IMG_4554.webp
Sponsored

 
OP
OP

samih

Member
Joined
Jul 25, 2025
Threads
2
Messages
5
Reaction score
1
Location
Pennsylvania
First Name
Samih
Vehicle(s)
2021 Mustang gt
Also is this covered under the powertrain warranty? It’s a 2021 gt with 55k miles
 

Skye

Well-Known Member
Joined
Jan 18, 2022
Threads
13
Messages
2,961
Reaction score
4,153
Location
≈39N
Vehicle(s)
"Skye" Mach1 N2144
Appears to be the pinion seal. The half shafts are dry.

Attached is an excerpt from the 2022 Warranty Guide. "Seals and gaskets" are covered. :thumbsup:

warranty.webp
 

Samiamthemustangman

Well-Known Member
Joined
Mar 21, 2025
Threads
13
Messages
127
Reaction score
44
Location
Gulfport
First Name
Sam
Vehicle(s)
2015 mustang
I had my pinion seal fixed. With no warranty it's a little over $600. I would not recommend you doing it yourself. It requires a few speciality tools and both rear tires have to be off when torking.
 
OP
OP

samih

Member
Joined
Jul 25, 2025
Threads
2
Messages
5
Reaction score
1
Location
Pennsylvania
First Name
Samih
Vehicle(s)
2021 Mustang gt
I had my pinion seal fixed. With no warranty it's a little over $600. I would not recommend you doing it yourself. It requires a few speciality tools and both rear tires have to be off when torking.
$600 for a seal 😂😂😔, gonna call and check today I believe it’s covered under warranty.
 

Samiamthemustangman

Well-Known Member
Joined
Mar 21, 2025
Threads
13
Messages
127
Reaction score
44
Location
Gulfport
First Name
Sam
Vehicle(s)
2015 mustang
$600 for a seal 😂😂😔, gonna call and check today I believe it’s covered under warranty.
Yes it felt like a rip off. Somethings I only trust the dealership to do certain stuff. Im sure an uncertified ford mechanic would have an assistant hit the brakes while he tightens the pinion. Id laugh but for that price it would be the tears of a clown. My uncle and I do most of the mechanic work. Tell t hem to replace the flange also. Let ford take the $275 bill L○L

20250912_113854.webp
Sponsored

 
Last edited:
 








Top