i have an 86 sport coupe 305, with an open diff drum 2:73 rear end. i have the opportunity to get a 3:73 posi disk rear end. is it a direct swap? what will i need to get the job done?

also, i was thinking of adding a b&m shift kit to my 700r4. can i install a shift kit with the tranny still in the car?

thanks

 

the rear should be a direct swap. some say to change your proportioning valve to a 4 disc one but i have a drum rear proportioning valve on my car right now with no issues.




stay away from the B&M shift kit. most on this board will tell you the same thing. go with transgo if you want a good shift kit.

 

thats what i thought about the proportioning valve, thanks

 

You'll have to change the drive and driven gears on the tail shaft of the transmission if you want the odometer and speedometer to read correctly.

how to change the speedo gears

 

Where are you getting this 3:73 with a Liminted slip from??? And what year is it???