Mark Hubley

I just picked up a used early 944 transmission with a limited slip diff. I plan to put it in my 924S. While swapping trannys, I'll want the shorter 5th gear that is in the tranny of my 924S. According to the stamp on the tranny, the one from the 944 has the LSD and the 0.7297 5th gear ratio (8Q); the one in my 924S has an open diff and the 0.8286 5th gear. I've assumed that I'll need to open both gearboxes to swap 5th gears.

However, it's conceivable that a previous owner may have installed the short 5th gear. If I pull the back end off the 944 tranny, is there a way to tell for sure which 5th gear is in there? Anybody know the number of teeth on the gears???

Looks like the "shifting gear" has part number 016 311 353 B for the 0.8286 ratio and 016 311 353 E for the 0.7297. If I can see the part number.

Anyway, if I can tell which 5th gear is in the 944 tranny, then that might save me from opening the 924S tranny (which doesn't look like that big of a deal).

Assuming I need to do the swap, then this is the web site I've found for guidance:

http://www.944spec.org/944SPEC/techn...-5th-gear-swap

V2Rocket

Count revolutions?

Kurt R

Tall 5th 37:27 (0.7297)
Short 5th 35:29 (0.8286)
if you feel like counting. Of if you want to count a different way, put the transmission in 5th and turn the input 100 times, count how many times the output flanges turn. Short 5th 31 times, long 5th 35 times.