Topic: 68 J-Code Automatic Drive Shaft Markings

[68 S Code]

Pete excellent work on the front end doing the forensics as well as in the restoration of the piece. Although this example does not apply to mine in the specific sense it does answer a question I sent to Jeff S just yesterday. The yoke at the transmission end (C6) shows traces of pink. That has been verified as being correct for my application. The question I had for Jeff was whether this was brushed or sprayed because it almost looked like a dusting of pink. After looking at your work it seems to me that it was sprayed. Is that correct? I've heard of the yellow mark at the rear yoke and on the diff third member. I see that this example had blue at the rear and yellow at the front. I wonder what the yellow at front would designate?

[gtamustang]

Thanks for the feedback. It comes from years of practice and great feedback and technique from Jeff and Charles.

There is no pink at the yokes on John's driveshaft. Both shaft yokes as well as the transmission yoke were painted a muddy red oxide before the ends were welded and and machining was completed. Not sure how that will play into your pink.

There is a general belief that a yellow mark on the tail yoke corresponded to a yellow mark on the third member yoke for balancing purposes. Sometimes I don't try to understand the marks, i just dulicate what I find instead! BTW, that "blue" mark actually is a green...didn't come out too well in my photos.

Regards,
Pete Morgan

[68 S Code]

Peter again great work. From the few examples I've seen and noted it looks to me like FE's out of Dearborn (that i know of) with a C6 had driveshaft yoke at the front painted pink. Best match in color would be like MOPAR Pink used on ealy 1970 Challengers. I only found the pink on the yoke with the shaft but it makes sense that the ears on the drive shaft would have been also marked to make sure they were assembled color to color. The yellow daub on the rear ears and the third memeber yoke are as mentioned for some balancing vibration issue which i learned of on this site as well as read in the chassis manual. I just didn't ever hear of or seen a yellow daub on the front ear. Maybe for the same reason as in the back. I used a 1x12 closet shelf  with some inexpensive casters to make a devise to spin the drive shaft as i applied a brush with the paint for striping. Worked very nicely.

[J_Speegle]

.............. The yoke at the transmission end (C6) shows traces of pink. That has been verified as being correct for my application. The question I had for Jeff was whether this was brushed or sprayed because it almost looked like a dusting of pink. After looking at your work it seems to me that it was sprayed. Is that correct? [/quote]

On the original 68's I have pictures of with the pink it was brushed - what is left of yours (a dusting) can just be many years of wear and tear from the elements. IMHO

I've heard of the yellow mark at the rear yoke and on the diff third member. I see that this example had blue at the rear and yellow at the front. I wonder what the yellow at front would designate?

On the later car's with 9" it appears that the blue mark on the yoke washer and sometimes overspray onto the 3rd member when it was applied is pretty typical. The  yellow mark to match the rear end of the driveline and the rear end yoke is mentioned in a 66 TSB article to help repair personnel to realign the driveline to its original orientation after a repair. Apparently they were having problems with vibrations developing after repairs on some units.

The use of yellow (for this purpose) seems to have dropped out of use only after a few years

[Murf]

In this image
http://www.concoursmustang.com/forum/index.php?topic=2031.msg10356#msg10356
of a driveshaft from a C4 / 9 inch "J" code would you call the colors Pink/Blue/White?

[J_Speegle]

In this image
http://www.concoursmustang.com/forum/index.php?topic=2031.msg10356#msg10356
of a driveshaft from a C4 / 9 inch "J" code would you call the colors Pink/Blue/White?

Same picture as the one in the first part of the thread -

But no - not Pink/blue/ white but instead believe its Light blue/dark blue/pink as listed in 68 GT350 buildsheets only shown in the picture in reverse

Of course (for others viewing this thread) there were at least four different drivelines installed in J code 68 since they were built with two different rearends