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  • 1965 - 1973 Classic Mustangs -General/Talk-

C4 Transmission Servo cover leak

  • Thread starter Thread starter Justin87
  • Start date Start date May 5, 2024

Justin87

5 Year Member
Aug 7, 2017
158
45
48
May 5, 2024
#1
  • May 5, 2024
  • #1
Hello-

I don't have a classic mustang (I'm a foxbody guy) but I do have a C4 transmission from a 1973 Ford Maverick with a 302.

I have been chasing down a transmission fluid leak and determined that it is leaking from the passenger side servo cover.

My question is... Can this be changed while the transmission is in the car and without removing the pan and valve body? (I just changed the pan gasket of course)

Any tips and tricks would be amazing.

Thanks

-Justin
 

Realmongo

I prefer to be called "Evil Genius"
Founding Member
Oct 10, 2001
2,468
86
99
Western Mass
May 10, 2024
#2
  • May 10, 2024
  • #2
Justin87 said:
Hello-

I don't have a classic mustang (I'm a foxbody guy) but I do have a C4 transmission from a 1973 Ford Maverick with a 302.

I have been chasing down a transmission fluid leak and determined that it is leaking from the passenger side servo cover.

My question is... Can this be changed while the transmission is in the car and without removing the pan and valve body? (I just changed the pan gasket of course)

Any tips and tricks would be amazing.

Thanks

-Justin
Click to expand...
Sure can, here is the procedure:
 

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Justin87

5 Year Member
Aug 7, 2017
158
45
48
May 14, 2024
#3
  • May 14, 2024
  • #3
Realmongo said:
Sure can, here is the procedure:
Click to expand...
Thanks so much for responding!

The transmission is running fine and shifting very well, ideally I'd love to just change the gasket for the cover to stop the leak. I have seen a lot of chatter about a spring or a band adjuster falling back into the pan or something (which i really do not want to have to remove again)... any concern there?

I'd love to keep the piston and everything in place and just fix this cover leak.
 
Last edited: May 14, 2024

Realmongo

I prefer to be called "Evil Genius"
Founding Member
Oct 10, 2001
2,468
86
99
Western Mass
May 23, 2024
#4
  • May 23, 2024
  • #4
Justin87 said:
Thanks so much for responding!

The transmission is running fine and shifting very well, ideally I'd love to just change the gasket for the cover to stop the leak. I have seen a lot of chatter about a spring or a band adjuster falling back into the pan or something (which i really do not want to have to remove again)... any concern there?

I'd love to keep the piston and everything in place and just fix this cover leak.
Click to expand...
I don't have a lot of experience with C4 transmissions other than doing a band adjustment and changing the fluid and filter, but I've never heard anything about parts falling into the pan.
 
K

Kazuja

New Member
Sep 12, 2025
1
0
1
Italy
Sep 12, 2025
#5
  • Sep 12, 2025
  • #5
Justin87 said:
Thanks so much for responding!

The transmission is running fine and shifting very well, ideally I'd love to just change the gasket for the cover to stop the leak. I have seen a lot of chatter about a spring or a band adjuster falling back into the pan or something (which i really do not want to have to remove again)... any concern there?

I'd love to keep the piston and everything in place and just fix this cover leak.
Click to expand...
Hello Justin has you reach to change the cover gasket without any problem, I need to do the dame procedure and I've fear that some parts can be falling back into the pan. Let me know please.
 
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