Auto vs. manual driveshaft

[mikejpss]

Is there a different length driveshaft for a 4 speed? Am looking into converting my auto tranny to a 4 speed and was wondering if I will have to modify/changeout the primary shaft.
Any help is appreciated.
mikejpss

[GerryLP]

Originally Posted by mikejpss

Is there a different length driveshaft for a 4 speed? Am looking into converting my auto tranny to a 4 speed and was wondering if I will have to modify/changeout the primary shaft.
Any help is appreciated.
mikejpss

Mike,

The propeller shaft for the manual tranny is officially at
2.50" X 28.13" X0.083" (thickness).

The automatic propeller shaft is 2.50" X 28.07" X 0.065" (thickness)

The manual tranny slip-yoke splines come in at 32 teeth (splines). The auto has 27 splines.The splines outter diameter also are different. The manual slip yoke has a diameter of 1.39" and the auto is 1.17".

I hope this helps.

GerryLP

[mikejpss]

Thanks Gerry, BIG help.

[like2drive]

the overall length is less than 1/4" between the automatic and the manual. The only reason you can't use the auto for a manual application is the U-joints.

The manual has a 5-790X and a 5-785X (Spicer Nos.), or there are two different sizes. The automatic has the same, smaller size on both ends.

Another note: be sure to allow for 1 to 1.5 " "sliding room" on the yoke so as the car encounters potholes, RR tracks, different suspensions...the driveline can slide back and forth to accomodate the extremes. good luck, jim

[like2drive]

I've accumulated a 45 item list of parts needed for this exchange I could email you if you want. jim

[mikejpss]

please send the list Jim, thanks.

[pbcanney]

Originally Posted by like2drive

I've accumulated a 45 item list of parts needed for this exchange I could email you if you want. jim

paul@canney.net