C4 Trans identification

Flatspin_old · July 25, 2007 at 3:17 PM

I came across a C4 transmission claiming to be in a K code.

The tag reads:

PCB BA

289 5H10B2

The casting number on the trans is:

C6DP 7006A

Is this correct for a 1966 K code?

Can someone help me and tell me what these numbers mean?

bobmannel · July 28, 2007 at 3:41 PM

There is no PCB-BA tag. The 1966 Mustang 289 HiPo tag was PCW-BA. The date is August 10, 1965, which is very early 1966 production, so if the tag is PCW-BA, the answer would be "yes".

Flatspin_old · July 31, 2007 at 10:49 AM

woops - tag is:

PCW BA

289 5H10B2

so looks correct!

289tr4_old · July 31, 2007 at 9:24 PM

The Shelby Club did a HIPO 289 C4 article a few (or more) years back and I think they noted a stiffer tailshaft governor/spring that allows the trans to shift at higher revs in drive than a low rev lopo C4. e.g 5800-6000 RPM vs 4400-4800 RPM. I think also a bigger diameter 2-3 servo for more oomph and perhaps with the slightly less vacuum of the hotter cam.

Apparantly some shops used to switch these parts out with stock ones when doing a rebuild. So in addition to getting the right casting/serial numbers you may need to verify the correct internal parts after all of these years.

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