splines on 700R4

[camaro68]

Got 2 700R4s today and they both have 27 splines on the output shaft. Where does the 27 or 30 splines come into play. Is the 30 spline stronger.

[megaladon6]

the early ones had the 27 splines. i believe they switched in '84.
i'd guess that, just like axles, the larger spline count is stronger.

[MarkB]

All 700-R4 transmissions have 27 spline output shafts. The difference is on the input shafts. 1982 - 1986 had 27 spine input shafts and 1987 - up had the 30 spline. I would recommend always sticking to the '87 - up 700-R4, the 30 spline input is better along with a few other items in the transmissions.

Mark
Bowler Performance Transmissions
www.bowlertransmissions.com

[camaro68]

Thanks for the information

All 700-R4 transmissions have 27 spline output shafts. The difference is on the input shafts. 1982 - 1986 had 27 spine input shafts and 1987 - up had the 30 spline. I would recommend always sticking to the '87 - up 700-R4, the 30 spline input is better along with a few other items in the transmissions.

Mark
Bowler Performance Transmissions
www.bowlertransmissions.com