Is there a difference between the small block and big block 727 housing tail?

GassMann

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I had a 318 with a 727 and installed a 440 then upgraded the transmission housing by rebuilding the old gears and putting them into the new housing. I am struggling with fitting the drive shaft. It does almost all the way in but not far enough and it seems to hard-stop.

I am not a transmission guy so I most likely did something wrong but what? The output shaft splines appear to stick out the same amount as the small-block housing did and it "LOOK" the same. I just can't seem to get it to go in. Is there an difference between the 440 and 318 drive shaft?
 

GassMann

Well-Known Member
Local time
2:14 PM
Joined
Feb 2, 2020
Messages
66
Reaction score
10
Location
Pullman WA
I had a 318 with a 727 and installed a 440 then upgraded the transmission housing by rebuilding the old gears and putting them into the new housing. I am struggling with fitting the drive shaft. It does almost all the way in but not far enough and it seems to hard-stop.

I am not a transmission guy so I most likely did something wrong but what? The output shaft splines appear to stick out the same amount as the small-block housing did and it "LOOK" the same. I just can't seem to get it to go in. Is there an difference between the 440 and 318 drive shaft?
Disregard... It's been a few decades since I worked on a car and I am not using enough force. New seals were stopping it from going all the way in. A bit of force with a soft-blow hammer and it got past the hang up.
 
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