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  • 1965 - 1973 Classic Mustangs -General/Talk-
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HOW DO I CHANGE A SERVO ON A C4 TRANNY

  • Thread starter Thread starter tomypasta
  • Start date Start date Jan 23, 2009

tomypasta

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Dec 14, 2008
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Jan 23, 2009
#1
  • Jan 23, 2009
  • #1
Can anyone please explain how I would change out a servo on my C4 tranny. The tranny is out of the car right now. Thanks Tommy
 
N

Nosboss

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Dec 17, 2007
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Jan 23, 2009
#2
  • Jan 23, 2009
  • #2
Are you talking about the second gear servo?
 

mtaqua

Member
Oct 7, 2006
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Jan 23, 2009
#3
  • Jan 23, 2009
  • #3
should be 4 bolts. You might have to pry a little or use a small hammer to get the cap off. Be careful, the servo piston is under pressure from a spring. Take note of how the piston is oriented (There will be a hole for fluid flow). Also, be prepared for some fluid to come out. I did it in the car and it was a PITA, but out of the car shouldn't take more than 10 minutes.
 

tomypasta

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#4
  • Jan 23, 2009
  • #4
Nosbos I am talking about the 2nd gear servo.
After I take out the bolts and pry off the case do I have to worry about anything inside the tranny falling off or comming apart?
 

tomypasta

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#5
  • Jan 23, 2009
  • #5
The servo I am talking about is on the passenger side of the tranny
 
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Nosboss

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Jan 24, 2009
#6
  • Jan 24, 2009
  • #6
Yes, you do. I replaced mine when I had a c4 years ago. You will have to drop the pan and remove the valve body. Its really very easy so don't be worried about removing those. Once you get those off then remove the servo cover and then the servo. You will see a "thing" fall out of the inside of the tranny. It goes between the servo shaft and the band. You need to put it back in place when you re-install the servo. Then its as simple as installing the valve body, oil pan and servo cover... nothing to it.

BTW, why is it being replaced?
 

tomypasta

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Jan 24, 2009
#7
  • Jan 24, 2009
  • #7
the c4 I am going to ut in the car has a small Z servo and most of the Mustangs I have seen have a larger A servo.
 

woodsnake

15 Year Member
Jan 16, 2007
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Hicksville, NY
Jan 24, 2009
#8
  • Jan 24, 2009
  • #8
I tried to google this last night, and from my research, it seems like it's not really worth the effort.
Are you building high performance engine and trans, or do you just want to improve your stock trans shift?
 

tomypasta

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#9
  • Jan 24, 2009
  • #9
Woodsnake I am trying to improve stock trans shift
 
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Nosboss

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#10
  • Jan 24, 2009
  • #10
tomypasta said:
the c4 I am going to ut in the car has a small Z servo and most of the Mustangs I have seen have a larger A servo.
Click to expand...

I have never messed with a small servo c4. I will do some looking...
 

woodsnake

15 Year Member
Jan 16, 2007
1,352
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69
Hicksville, NY
Jan 24, 2009
#11
  • Jan 24, 2009
  • #11
You might give this a read. I don't think you will net much gain just from changing the servo, especially on an otherwise original/stock/not recently rebuilt trans.



C4 Performance Modifications - Click Click Racing Forums
 

tomypasta

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Dec 14, 2008
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Feb 10, 2009
#12
  • Feb 10, 2009
  • #12
nosboss when i change out the servo and i get the peice that falls out between the servo and the band does it stay with the servo as a matched pair or doesnt it matter when i put another servo in its place? Thanks allot
 
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