ConcoursMustang Forums

1st Generation 1964 1/2 - 1973 - Questions & general discussions that apply to a specific year => 1968 Mustang => Topic started by: tim_morrison82 on February 19, 2019, 01:39:49 AM

Title: 68 J code with C4 drive shaft markings (SJ 12/67)
Post by: tim_morrison82 on February 19, 2019, 01:39:49 AM
Here are before evaporust pics of the drive shaft from the car in my signature.
Title: Re: 68 J code with C4 tail shaft markings (SJ 12/67)
Post by: tim_morrison82 on February 19, 2019, 01:44:06 AM
After evaporust
Title: Re: 68 J code with C4 tail shaft markings (SJ 12/67)
Post by: tim_morrison82 on February 19, 2019, 02:09:49 AM
Found and bought way too much evaporust... ive been putting everything through. just did the tail shaft.

I have found 3 main wide rings in the centre, 2 narrow white rings at approx quarter distance each end, a orange ring at the end that has the rubber insert showing, and the knuckle on that end painted orange on the casting.

An aditional orange/red mark runs along the welded seam lengthways and curls around the weight on one end. I assume this is an inspection mark for the weld.

Also the yoke showed yellow paint over the knuckle. I assume the original uni joint woult have the same yellow paint on it.
Title: Re: 68 J code with C4 tail shaft markings (SJ 12/67)
Post by: RoyceP on February 19, 2019, 10:09:41 AM
FYI - the tailshaft is part of the transmission. Your photos show the drive shaft.

Great information and photos, might be easier to search later if you changed the title of your post to 1968 J code driveshaft markings or something similar.
Title: Re: 68 J code with C4 tail shaft markings (SJ 12/67)
Post by: 67gtasanjose on February 19, 2019, 01:28:09 PM
FYI - the tailshaft is part of the transmission. Your photos show the drive shaft.

Great information and photos, might be easier to search later if you changed the title of your post to 1968 J code driveshaft markings or something similar.

If you flip it over, it becomes a "tail shaft". It all depends what side of the Equator a person resides, I suppose :)
Title: Re: 68 J code with C4 tail shaft markings (SJ 12/67)
Post by: J_Speegle on February 19, 2019, 02:40:24 PM
Also the yoke showed yellow paint over the knuckle. I assume the original uni joint woult have the same yellow paint on it.

Never recall seeing a transmission yoke like that on a Mustang. Truck and van - maybe a big car but not a Mustang
Title: Re: 68 J code with C4 tail shaft markings (SJ 12/67)
Post by: 67gtasanjose on February 19, 2019, 03:22:33 PM
Never recall seeing a transmission yoke like that on a Mustang. Truck and van - maybe a big car but not a Mustang

Later 70's perhaps. I thought the same thing.
Title: Re: 68 J code with C4 drive shaft markings (SJ 12/67)
Post by: DTruitt on February 19, 2019, 05:54:51 PM
It might also be beneficial to indicate 8 inch rear, since J-Codes could come with either depending on options.

Great pics, great info!

Danny
Title: Re: 68 J code with C4 drive shaft markings (SJ 12/67)
Post by: tim_morrison82 on February 21, 2019, 09:06:12 AM
Never recall seeing a transmission yoke like that on a Mustang. Truck and van - maybe a big car but not a Mustang

Thanks for pointing that out. i have a C4 with a partial vin that is from the Kansas plant. it could have something to do with that. i'll see if i can track down the stamp, but i think its 69, and i thought it may have been from a maverick? would this be similar to a 69 maverick yoke?
Title: Re: 68 J code with C4 drive shaft markings (SJ 12/67)
Post by: tim_morrison82 on February 24, 2019, 12:11:54 AM
Here is the C4 it came with. I know that the C4 is not tge original one due to the 9K148841 partial vin stamp. So the yoke is different to the 68? I would assume the 9 means 69 rather than 79. I didnt think there would ve many differences. What should the yoke look like?
Title: Re: 68 J code with C4 drive shaft markings (SJ 12/67)
Post by: Bossbill on February 24, 2019, 12:38:16 AM
Mustangs used the infamous two-piece, steel-around-rubber-around-steel tube driveshaft?
Title: Re: 68 J code with C4 drive shaft markings (SJ 12/67)
Post by: tim_morrison82 on February 24, 2019, 12:51:51 AM
I think the drive shaft is correct but the yoke has been questioned.
Title: Re: 68 J code with C4 drive shaft markings (SJ 12/67)
Post by: ruppstang on February 24, 2019, 10:16:21 AM
Tim it is the end of your driveshaft shown in your first picture that looks odd to me. Here are some pictures of a  restored 68 C code automatic driveshaft.
Title: Re: 68 J code with C4 drive shaft markings (SJ 12/67)
Post by: tim_morrison82 on February 24, 2019, 12:39:03 PM
Thanks Marty. Looking at your pics and what ive noticed on mine, the only thing different is the yoke. The rest looks the same. It could be my crappy phone making it look off. There is a heap of grease still built up on the ends. I didnt want to scrub any markings off as i went. I can see part numbers on the end of my shaft. Ill clean them up this week and post them.
Title: Re: 68 J code with C4 drive shaft markings (SJ 12/67)
Post by: tim_morrison82 on February 24, 2019, 12:42:16 PM
Ah. I think you see the yoke and mistake it for the shaft. The yoke has the yellow paint on it. And it loaded first in the after photos. It also has a 69 on it...
Title: Re: 68 J code with C4 drive shaft markings (SJ 12/67)
Post by: J_Speegle on February 24, 2019, 07:37:34 PM
What should the yoke look like?


Note rear trans seal has been replaced in this first example

(http://www.concoursmustang.com/forum/gallery/11/6-240219183626.jpeg)


(http://www.concoursmustang.com/forum/gallery/11/6-240219183645.jpeg)