[Dwain]

You need to look through the hole in the trans and determine the color of the other gear the red gear meshes with. There is a yellow, black or a clearish green color. Also post your rear end gear. The combination of the gear in the trans and the gear in the rearend dictates which gear you use on your sender. IN some cases you have to change the gear in the trans in order to get the appropriate ratio for you rearend gear choice.

 

[Dwain]

you mean look into this hole in the trans? and can you change the gear on the inside as well or just the one i took the pic of

Yes, use a flashlight and figure out what color it is. The one inside the trans can be changed too but it requires the tailshaft to be removed which isnt very difficult. Changing the one in the transmission is only needed if you can get get the correct ratios using the existing gear inside the trans which usually isnt an issue unless you have short gears.

 

[Dwain]

just put the car in the air and rotate the tire 1 full revolution and count the number of times your drive shaft turns. That will tell you your gear ratio in the rearend.

 

[Dwain]

i have the engine trans and driveshaft out of it rn im guessing i can turn it and mark the yoke where the driveshaft connects

Correct.