Noticed a slight lip/ridge when I took ds out. Normal ?
67 barracuda 904 trans.
Thanks
Steve
67 barracuda 904 trans.
Thanks
Steve
Lip/ridge on 904 driveshaft yoke
- Thread starter 4spdragtop
- Start date
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Yes normal. Not wear.
There are long yokes and short yokes.
These yokes have the same length splined area just the longer one has additional material past the splines. They are NOT intended as a yoke that can protrude out of the transmission farther
The one you have is the long, functionally the same as the short.
BUT... I read somewhere that they changed to the shorter one due to vibrations introduced by the long.
If you put a short next to a long the seal surface from the yoke to the end of the seal surface is the same on both.
Post 4
904 slip yoke
Far left is aftermarket
Next it long
Next 2 are OEM short
There are long yokes and short yokes.
These yokes have the same length splined area just the longer one has additional material past the splines. They are NOT intended as a yoke that can protrude out of the transmission farther
The one you have is the long, functionally the same as the short.
BUT... I read somewhere that they changed to the shorter one due to vibrations introduced by the long.
If you put a short next to a long the seal surface from the yoke to the end of the seal surface is the same on both.
Post 4
904 slip yoke
Far left is aftermarket
Next it long
Next 2 are OEM short
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It's built that way, not worn out
Thanks for abv pics and info Dana! "Problem" solved.
Oh …. It’s got a step not a groove . I interpreted it to be a groove from the seal .
Got it !
Btw, I inserted the long one I have all the way in (without a seal installed) and it never bottomed out on anything internally.
My dart was built in Feb of 67, and has the shorter yoke. (@4spdragtop) Steve when was your cuda built?
My dart was built in Feb of 67, and has the shorter yoke. (@4spdragtop) Steve when was your cuda built?
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Not really. The smaller OD goes into the seal and then as you push it in farther the seal expands easily over the seal surface area.
But like left hand lug studs proved unnecessary
Not sure Dana, I think later than yours.
Vaanth
Well-Known Member
The stepped area on the pictured A904 slip yoke is normal as originally machined. The inner splines end in the same area. The smooth bore portion is for the slip yoke's inner seal used in 1966 A904 transmissions, and 1965 - 1966 A727 transmissions, except Imperial.
The inner seal was dropped for 1967 and later, but the yoke extended smooth portion was retained until 1970. The following image shows the inner seal:
The inner seal was placed on the output shaft ahead of the splines in a machined area for it. The following image shows the seal on an output shaft:
The following diagram shows the seal as installed in the 1966 transmission:
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I was wrong, prod date Dec 21 1966, SO # 02258
MidnightSwinger
Well-Known Member
My 67 was also a late 66 build car, it had the lip on the yolk.
I have only (up to now) seen the shorter version other than the one I bought. My 67 is a one family (my dad ordered it) it has always had the shorter version. My assumption was the longer one was phased out as parts ran out.
But your info was really cool to see.
Thanks
Vaanth
Well-Known Member
It was likely a phased change in machining, and supply, until the formal part and numbering change in 1970.
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