What servo does my C-4 have?

82 GT · 01-20-2005, 05:47 PM

Which servo came factory on the C-4 trannys? I have a '78 C-4(case fill) and I want to do add a manual valve body and upgrade to either an "H" or "R" servo. I was wondering which one it has already.
Also, where is a good place to buy an upgrade servo?
Which one would be better...the H or the R servo?

82 GT · 01-23-2005, 01:51 PM

Does anyone know the answer?

Rev · 01-23-2005, 05:01 PM

I think what we don't know is the difference in "H" and "R" servos. I do believe that there are two different servos, some being race oriented. My bet is that there is an '"R" for race servo of some larger diameter that delivers stronger shifts. I think these are available from the after-market. My belief is that these would be the "R" servos and that the "H'" servos would be the stock ones. This is all complete conjecture.

Rev

01-20-2005, 05:47 PM	#1 (permalink)
82 GT Import Slayer Join Date: May 1999 Posts: 2,237	What servo does my C-4 have? Which servo came factory on the C-4 trannys? I have a '78 C-4(case fill) and I want to do add a manual valve body and upgrade to either an "H" or "R" servo. I was wondering which one it has already. Also, where is a good place to buy an upgrade servo? Which one would be better...the H or the R servo? __________________ '82 GT 351W (.060)Comp Cams 274* Extreme Energy cam, ported & polished heads w/ 1.94/1.60 valves 10.3:1 flat top pistons,stealth intake, Mallory dizzy,Holley 750dp carb, BBK shorties,Flowmaster exhaust,C-4 with 3700 stall converter, B&M pro shifter,8.8 rear, 4:10's, subframes, electric fan, powermaster alternator, 4 core radiator. Last edited by 82 GT : 01-22-2005 at 12:20 AM.

01-23-2005, 01:51 PM	#2 (permalink)
82 GT Import Slayer Join Date: May 1999 Posts: 2,237	Re: What servo does my C-4 have? Does anyone know the answer? __________________ '82 GT 351W (.060)Comp Cams 274* Extreme Energy cam, ported & polished heads w/ 1.94/1.60 valves 10.3:1 flat top pistons,stealth intake, Mallory dizzy,Holley 750dp carb, BBK shorties,Flowmaster exhaust,C-4 with 3700 stall converter, B&M pro shifter,8.8 rear, 4:10's, subframes, electric fan, powermaster alternator, 4 core radiator.

01-23-2005, 05:01 PM	#3 (permalink)
Rev Registered Member Join Date: Nov 1998 Location: Houston, Tx. Posts: 3,887	Re: What servo does my C-4 have? I think what we don't know is the difference in "H" and "R" servos. I do believe that there are two different servos, some being race oriented. My bet is that there is an '"R" for race servo of some larger diameter that delivers stronger shifts. I think these are available from the after-market. My belief is that these would be the "R" servos and that the "H'" servos would be the stock ones. This is all complete conjecture. Rev __________________ '66 Coupe, 306, 350-375 HP, C-4, 13.07 e.t., 104.8 mph, 1/4 mi. O.B.C. #2 '66 coupe

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