TF 727 Guru?

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Ghostrider 67

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Who is the resident guru for BB TF 727's? Specifically swapping short tail shaft for a long car one and the long housing? Plus I need to reconnect with whomever it was on here last winter that had the tail shafts and housings.... Thanks, Ghost.
 
I have a complete tail shaft & housing. Make me an offer on it, I'll get it boxed up & get an actual shipping price. PM me your address so I can get the shipping price if you are interested. If you PM me your email address, I'll send you some pictures.
 
The early 727 had small pilot hole in the back of the input shaft and tiny snout at the front of the output shaft. The later ones, about 1970 I guess, went to a larger pilot. So you can't mix those up. Plus, the front planet splines have to match the splines on the front of the output shaft.
 
I have a complete tail shaft & housing. Make me an offer on it, I'll get it boxed up & get an actual shipping price. PM me your address so I can get the shipping price if you are interested. If you PM me your email address, I'll send you some pictures.
So, did you see the other guys post about the splines and years? My trans is a 1973 model. I will count the splines and let u know.
 
The spline count is the same; they're cut at different angles. Just get the front planetary that comes with the shaft. After checking on the pilot sizes.
 
The early 727 had small pilot hole in the back of the input shaft and tiny snout at the front of the output shaft. The later ones, about 1970 I guess, went to a larger pilot. So you can't mix those up. Plus, the front planet splines have to match the splines on the front of the output shaft.
Okay, bear with me here. I am not a transmission literate guy. School me please. What the heck are you talking about? The unit the guy has for me is a tail housing with a long shaft sticking out the front. This shaft has to go all the way through the transmission and out the front,....yes? So what yer saying is the shaft needs to be the same angles on the splines as the front of the trans where it comes out? Or what. I don't know a planetary gear from a ring gear. Pictures would be helpful...He says it's a "Late model" tail housing and shaft. So, seeing as mine is a 1973 it should work, yes?
 
Like this!

A-727 Image poster 11 17.jpeg
 
OMG! That makes it look like it's all one shaft! But the front shaft is in the forward drum above it over on the left; first part in the second row down. Ouch and only three directs! The front planet is first in the third row down. Its internal splines must match the front splines on the output shaft. This illustration shows only three planetaries on both gearsets. Many had four.
 
Ghost and CudaFact, I have other images too if you need to see them. Trans is a late 70s 318 truck trans so that is why it had the lower performance parts in it. :):)
 
Please give me your part number on the case. I may have the original build data for it. i think I have some back to 1973.
Tom
 
Every 727 I do has been apart before. I never rely on case numbers because they won't tell me what's been changed. When people call me up and start spouting case numbers, I know they aren't mechanics. They try to tell me they have a virgin transmission...you know what I think next right? If you think you can run numbers and get the right parts for a trans, you're just setting yourself up for a lot of shipping charges back and forth. Not only does the output shaft have to match the front planetary and the back of the input shaft, but the input shaft/forward drum has to match the pump; same as the direct drum bushing width has to match the pump. I always get the front planetary with the output shaft so I don't waste time running around. After, of course, I match the front of the output shaft with the back of the input shaft. Or you could just flip a coin..
 
Every 727 I do has been apart before. I never rely on case numbers because they won't tell me what's been changed. When people call me up and start spouting case numbers, I know they aren't mechanics. They try to tell me they have a virgin transmission...you know what I think next right? If you think you can run numbers and get the right parts for a trans, you're just setting yourself up for a lot of shipping charges back and forth. Not only does the output shaft have to match the front planetary and the back of the input shaft, but the input shaft/forward drum has to match the pump; same as the direct drum bushing width has to match the pump. I always get the front planetary with the output shaft so I don't waste time running around. After, of course, I match the front of the output shaft with the back of the input shaft. Or you could just flip a coin..
Don't get yer knickers in a wad. I Never said I was a mechanic. In fact I said I don't know much about transmissions. It would seem to me though that the average seller of a tail housing and shaft would not ordinarily also have the front planetary to go with it. So, assuming this, how am I supposed to obtain the correct one? If this is all true then I suppose I should just toss my trans in the trash and buy a whole new unit. Right? I came here for help, not to be ridiculed and confused. I don't have a ton of cash to through around, I just want to get the right thing to put this trans in my car.
 
GR, could it be maybe 3681056 maybe? That is a 73 440 standard. My books go back to 74 but the 73 unit crosses up to the -----866 in 74.

Cuda Hack is right in that many, many things are usually changed/gone/modified, or destroyed on these. Its a shame but hey, these things can be over 50 years old!

When new, the 866 was built like this: it used a short accumulator spring under the piston, it had a 3.2 ratio KD servo lever, it had a controlled load KD servo with single outer spring, it had a plain governor spool valve, a purple coded valve body, a 4 pinion front and 3 pinion rear planet carrier, 9 springs in the front clutch retainer with 4 friction discs, and it had a standard input and output shaft (not specially heat treated). Forgot to add it has a heavy inner governor weight and a green spring in the governor.
 
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GR,


When new, the 866 was built like this: it used a short accumulator spring under the piston, it had a 3.2 ratio KD servo lever, it had a controlled load KD servo with single outer spring, it had a plain governor spool valve, a purple coded valve body, a 4 pinion front and 3 pinion rear planet carrier, 9 springs in the front clutch retainer with 4 friction discs, and it had a standard input and output shaft (not specially heat treated). Forgot to add it has a heavy inner governor weight and a green spring in the governor.

Oh that's just plain MEAN!! haha.
 
GR, could it be maybe 3681056 maybe? That is a 73 440 standard. My books go back to 74 but the 73 unit crosses up to the -----866 in 74.

Cuda Hack is right in that many, many things are usually changed/gone/modified, or destroyed on these. Its a shame but hey, these things can be over 50 years old!

When new, the 866 was built like this: it used a short accumulator spring under the piston, it had a 3.2 ratio KD servo lever, it had a controlled load KD servo with single outer spring, it had a plain governor spool valve, a purple coded valve body, a 4 pinion front and 3 pinion rear planet carrier, 9 springs in the front clutch retainer with 4 friction discs, and it had a standard input and output shaft (not specially heat treated). Forgot to add it has a heavy inner governor weight and a green spring in the governor.
It might be that number. The position of the 5 or 3 is very faint.
 
I'm sensing that I need to just carry this damn trans to a shop and have them put it together. I hate it though because it was a strong trans with this 440 in the Ram truck. Not a thing wrong with it. Just need the longer tail. Dang it.
 
Here's a picture showing how to identify what input shaft you have (or are purchasing) by what the output end looks like. 62-64 used a bolt on yoke, 65 is a one year only, etc...

727 OUtput shafts.jpg
 
Here's a picture showing how to identify what input shaft you have (or are purchasing) by what the output end looks like. 62-64 used a bolt on yoke, 65 is a one year only, etc...

View attachment 1715273487
Okay, stupid question time. By output end do you mean the end of the shaft that sticks out from the rear end of the tail housing.
 
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