Author Topic: Non Mustang Big block tailshaft?  (Read 540 times)

pmustang

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Non Mustang Big block tailshaft?
« on: December 17, 2022, 06:02:35 AM »
Hello Folks. Would someone with more non Mustang knowledge then me possibly be able to ID the tailshaft with out rear shifter mount holes? Fairlane?

It’s listed on David key as various cars including 428 68/69 Mustang

Trans is a big in and output

No tag

I don’t recognise the trans mount foot and shifter holes are not in the rear

Other tail is a small block I have

pmustang

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Re: Non Mustang Big block tailshaft?
« Reply #1 on: December 17, 2022, 06:07:44 AM »
Case decodes as 67/68 wide bolt pattern

Tail is a C60R7A0404-C which has me confused As listed for Mustang 428/429

Thanks. Peter

98SVT - was 06GT

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Re: Non Mustang Big block tailshaft?
« Reply #2 on: December 17, 2022, 11:01:16 AM »
Tail is a C60R7A0404-C which has me confused As listed for Mustang 428/429

That's a casting/part number. It just means they went to the parts bin and used Revision C of a 1966 tailshaft for the later Mustang.
I'd wager if was first used in a Galaxie or truck.
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430dragpack

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Re: Non Mustang Big block tailshaft?
« Reply #3 on: December 17, 2022, 12:29:01 PM »
The C6OR-C tail housing is the short, Fairlane/390 Mustang/Cougar, tail housing typically used on all V8 engines in ‘66-and some ‘67 Fairlanes and some 390 Mustangs/Cougars, and is a small output shaft(28 spline).  There is overlap with usage of the C7OR-A housing.  The fairlane shifter bolts right to it in the front holes and the big block Mustang/Cougar uses an adapter to locate the shifter further back by using the same holes.  The C7OR-A tail housing is the same as the C6OR-C, but one was also made to accept the large output shaft(31 spline) of the ‘68 Torino 428CJ, ‘68-‘69 428CJ Mustang/Cougar/BOSS 429, which is confusing because a small output shaft C7OR-A housing can be bored out for a large out put shaft and so can the C6OR-C.  ‘69 428CJ Torino used a long out put shaft and a C9OR housing.  There is a C6OR-D tailhousing that looks exactly like the C6OR-C & C7OR-A as well and was made for the ‘66 427 Fairlanes and was carried over into the ‘67 427 Fairlane and on some ‘67 GT500’s (possibly some ‘68).  It is large output shaft only.
« Last Edit: December 17, 2022, 12:44:43 PM by 430dragpack »

pmustang

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Re: Non Mustang Big block tailshaft?
« Reply #4 on: December 18, 2022, 06:09:30 AM »
My gosh, thanks folks for taking the time to help me. It is very much appreciated

98SVT. that makes perfect sense that there is an original number then updates to the design.

430 Drag pack, So my tail shaft C60R-7A040-C. You think its a small block small output unit bored out for a larger tail shaft?

This is what got me confused on David Kees ID chart. My unit is listed twice

Thing is on his page the units shown with the descriptions below don't show the rear bosses (undrilled) in place like on my unit

Also mine definitely has the big output so may have been bored as you mention they can be.

But Davids chart lists for a 428/429 so could it have come with a large bore from Ford or is this a misprint?

So I can use this for a 428 but would need the shifter location adapter you mention. Can't say I have seen one. Or get another tailshaft

The large trans mounting "foot" is that for mounting in a larger car?

Sorry for all the questions. I've had over 200 Mustangs and these things intrigue me

C6OR-7A040-C
&
C7OR-7A040-A      1966-68 Fairlane, Cyclone, Ranchero, Torino 289, 302, 390
1966-69 Falcon 289, 302
1966-69 Mustang, Cougar  390
14" length, 28 spline

C6OR-7A040-C
&
C7OR-7A040-A      1967 up Fairlane, Cyclone 427, 428
1968-69 Mustang 428, 429

Thank you folks. Peter
« Last Edit: December 18, 2022, 06:12:51 AM by pmustang »

pmustang

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Re: Non Mustang Big block tailshaft?
« Reply #5 on: December 18, 2022, 06:18:17 AM »
I think I need one of these "C7OR-A tail housing is the same as the C6OR-C, but one was also made to accept the large output shaft(31 spline) of the ‘68 Torino 428CJ, ‘68-‘69 428CJ Mustang/Cougar/BOSS 429"

Rear shifter mount

31 spline output size

14 inch

Correct trans mount foot for a Mustang Xmember

Edit: I think my lack of knowledge is showing, I have been looking for more info online and it appears big block tailshafts have the wide "foot" mounting. Sorry to be a big lacking in knowledge for big block stuff.

Thanks, Peter

« Last Edit: December 18, 2022, 06:55:24 AM by pmustang »

shelbydoug

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Re: Non Mustang Big block tailshaft?
« Reply #6 on: December 18, 2022, 08:23:14 AM »
All of my transmissions have required "adapters" in order to mount the shifter. No shifter mounted directly to the tailshaft.

Why your tailshaft has the adapter bosses unfinished is the question. Perhaps that is just an error and it wound up as a service part? Why is it not part of a transmission assembly?

Ford has done some strange things that we all have witnessed. For instance, why did they bother to use different bore sleeves in the FE blocks instead of just using one that could be bored out to a 427 dimension? Just to save a few pennies on cast iron?
Then go and make all of these tailshaft castings that could have all been made from boring out one casting? It obviously made sense to them but that sense makes no apparent sense to us now?

How many shifter adapters are listed in the parts book? That's another example I think.
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pmustang

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Re: Non Mustang Big block tailshaft?
« Reply #7 on: December 18, 2022, 09:05:49 AM »
Sorry. I should have said shifter assembly.

I’m this instance I was noticing the
Threaded holes in this tail shaft are at the midpoint of the
Tailshaft rather then the end where I am used to seeing them.



430dragpack

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Re: Non Mustang Big block tailshaft?
« Reply #8 on: December 18, 2022, 10:40:24 AM »
This is the ‘67-‘68 Big block Mustang/Cougar adapter plate for use on either the C6OR-C & C7OR-A tailhousings.  The yellow circled holes mount it to the three tapped holes in the housing and the three red circled holes in the plate are tapped and the shifter is secured there. 
« Last Edit: December 18, 2022, 10:51:04 AM by 430dragpack »

430dragpack

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Re: Non Mustang Big block tailshaft?
« Reply #9 on: December 18, 2022, 10:46:57 AM »
This is the ‘69 Mustang/Cougar Big block adapter plate used on the C6OR-C & C7OR-A tailhousings.  The yellow circled holes mount it to the tapped holes in the housing and the red circles have two tapped holes to attach the shifter to the plate and one hole that goes through the shifter, through the plate and into the housing, shared with one of the yellow holes.  ‘69 shifters are one year only. ‘70 Ford went to the Hurst setups.
« Last Edit: December 18, 2022, 10:50:30 AM by 430dragpack »

430dragpack

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Re: Non Mustang Big block tailshaft?
« Reply #10 on: December 18, 2022, 11:09:20 AM »
Peter,

The tailhousing in your first post, second picture, is the housing typically used on small block Mustangs/Cougars with the rear mount location. There is a couple different versions of this housing, but all have the rear mount holes(and maybe others)  The C4ZR-A housing seemed to be in use the longest, and these have the narrow mounting pad for the transmission frame mount.  The shifters mount right on the housing until 1970 when the Hurst came out and it used an adapter plate on the same rear mount housing.
« Last Edit: December 18, 2022, 11:12:02 AM by 430dragpack »

pmustang

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Re: Non Mustang Big block tailshaft?
« Reply #11 on: December 19, 2022, 04:36:08 AM »
You folks are amazing

I can’t believe how tough this is to research when you don’t have baseline knowledge in a subject. In this case big block toploaders

Okay. So now I know my threaded hole location on mine is fine for a big block application as it uses an adapter plate to relocate the shifter.

One last question. Is my trans to cross member mounting boss correct for a big block?  I.E. the wider “foot” rather than the smaller oval I am used to?

Thank you folks.
Peter
« Last Edit: December 19, 2022, 04:44:37 AM by pmustang »

430dragpack

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Re: Non Mustang Big block tailshaft?
« Reply #12 on: December 19, 2022, 07:34:00 AM »
You folks are amazing

I can’t believe how tough this is to research when you don’t have baseline knowledge in a subject. In this case big block toploaders

Okay. So now I know my threaded hole location on mine is fine for a big block application as it uses an adapter plate to relocate the shifter.

One last question. Is my trans to cross member mounting boss correct for a big block?  I.E. the wider “foot” rather than the smaller oval I am used to?

Thank you folks.
Peter

Yes, the wide mounting boss is correct, that’s the only way the C6OR and C7OR housings came.

pmustang

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Re: Non Mustang Big block tailshaft?
« Reply #13 on: December 19, 2022, 09:03:29 AM »
Thank you so much.

Really appreciate it.

Thanks to everyone who answered. I have gained knowledge and that is a great thing

Cheers. Peter