Author Topic: 68 GT 500 Transmission  (Read 382 times)

Steve Z

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68 GT 500 Transmission
« on: June 12, 2018, 09:54:26 PM »
   I am looking to purchase a 68 GT500 that does not have the original Transmission. My question is 1. Do I worry that that will affect the overall Value of the car? 2. What should I be looking for as a replacement that would be as close to the factory as possible? Date codes, Vin numbers etc. The car currently has a 4 speed top loader from a Galaxie 500 that I have been told. Thanks Steve

PR

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Re: 68 GT 500 Transmission
« Reply #1 on: June 12, 2018, 10:11:42 PM »
I don't think a galaxies trans will work, too long,

Bob Gaines

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Re: 68 GT 500 Transmission
« Reply #2 on: June 12, 2018, 10:11:53 PM »
   I am looking to purchase a 68 GT500 that does not have the original Transmission. My question is 1. Do I worry that that will affect the overall Value of the car? 2. What should I be looking for as a replacement that would be as close to the factory as possible? Date codes, Vin numbers etc. The car currently has a 4 speed top loader from a Galaxie 500 that I have been told. Thanks Steve
If it is a GT500 and not a GT500 KR your chances and expenses will be better. The KR CJ trans is specific to Cobra jet cars . The R servo only fits a CJ C6 case. The CJ trans comes with a cast iron tail shaft while the GT500 has a cast aluminum one.  The GT500 H servo will fit in a generic C6 case found in all 67-70 Mustang and full size car. You have to be careful however because a case from a column shift car regardless of if KR or GT500 will not work in a floor shift car without a shifter lever change on the transmissions. That is about a 130-150.00 repro part. There is a date code clock on the main case but typically hard to read because of casting slag wear etc. There is a ID metal tag that is secured to one of the modulator bolts. They are typically VIN stamped on the top side in one of a couple typical locations that can't be seen once installed.
Bob Gaines,Shelby Enthusiast, Shelby Collector , Shelby Concours judge SAAC,MCA,Mid America Shelby

Bob Gaines

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Re: 68 GT 500 Transmission
« Reply #3 on: June 12, 2018, 10:14:42 PM »
I don't think a galaxies trans will work, too long,
The galaxy trans has two shifter bolt patterns so the shifter will fit the correct Mustang tunnel hole but since the tail is longer requires a shortened driveshaft . It will work but not without modifications.
Bob Gaines,Shelby Enthusiast, Shelby Collector , Shelby Concours judge SAAC,MCA,Mid America Shelby

Coralsnake

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Re: 68 GT 500 Transmission
« Reply #4 on: June 13, 2018, 06:32:32 AM »
Unless you have a very very original Shelby, its probably not going to effect the price significantly. Each transmission was specifically stamped with a VIN for the specific car. Many cars do not have their original drivetrain components. I would say its pretty much baked into the price of most cars already. Regardless, its less than 5% worse case scenario.
« Last Edit: June 13, 2018, 09:48:00 AM by Coralsnake »
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pbf777

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Re: 68 GT 500 Transmission
« Reply #5 on: June 13, 2018, 10:24:34 AM »
The R servo only fits a CJ C6 case.

     Perhaps in 1968 (?), but further forward in time, many (perhaps even most) of the cases not originally equipped with the "R" servo however were machined to accept such.    ;)

     Scott.

Bob Gaines

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Re: 68 GT 500 Transmission
« Reply #6 on: June 13, 2018, 02:41:55 PM »
The R servo only fits a CJ C6 case.

     Perhaps in 1968 (?), but further forward in time, many (perhaps even most) of the cases not originally equipped with the "R" servo however were machined to accept such.    ;)

     Scott.
Scott, I concur that there are equivalent servos made in the aftermarket that perform nearly the same however they don't look the same on the outside. Modifications can be done to cases to make things fit that otherwise would not. The OP was concerned about correct parts "as close to factory as possible". So my response was in context to factory parts that look correct without modification.     
Bob Gaines,Shelby Enthusiast, Shelby Collector , Shelby Concours judge SAAC,MCA,Mid America Shelby

pbf777

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Re: 68 GT 500 Transmission
« Reply #7 on: June 14, 2018, 01:51:39 PM »
     Just to clarify, I was solely referring to the C6 main cases as being machined by Ford to accept the original Ford "R" servo, even though in the production assembly they may have received other. I would say that Ford chose to adopt the manufacturing requirement change (post 1968+/-) to reduce confusion/complications in production or as parts replacement.     :)

     Scott.
« Last Edit: June 14, 2018, 01:54:55 PM by pbf777 »

Bob Gaines

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Re: 68 GT 500 Transmission
« Reply #8 on: June 14, 2018, 11:14:54 PM »
     Just to clarify, I was solely referring to the C6 main cases as being machined by Ford to accept the original Ford "R" servo, even though in the production assembly they may have received other. I would say that Ford chose to adopt the manufacturing requirement change (post 1968+/-) to reduce confusion/complications in production or as parts replacement.     :)

     Scott.
I am not aware that a original R servo will fit in anything but a original R servo case without additional modification. Regardless original Ford R servo are seldom if ever found separate. ;)
Bob Gaines,Shelby Enthusiast, Shelby Collector , Shelby Concours judge SAAC,MCA,Mid America Shelby