Whats up guys? So i decided to upgrade my NA open diff into an LSD one. the thing is i didnt get the whole diff, i just got the guts and decided to do the exchange myself (yes i know, im crazy). i have my diff all taken apart and im ready to put the other one in but i need the specs of the diff, like bearing pre-load, backlash and tourque numbers on the bolts. i was going to take pics of the whole process but i kept on forgetting my camera. i saw that a guy on here switches a miata diff onto an FC but no specific specs.....any help is greatly appriciated. thanks!

 

First off, you're not crazy for changing internals of your diff.

I did it, too. Multiple forum bucks for us.

And the information you're seeking can easily be found in the FSM and/or Haynes.

James

 

i went to Ricer Central (pep boys) today and found a haynes manual, and i was searching but nothing about bearing pre-load or backlash. just tourque on OUTSIDE bolts of the diff....how did you do yours?

 

need some help......please!!! lol

 

Dunno why you think that's crazy, it's actually pretty common. I put an FD LSD centre in mine.

All the info you need is easily found in the Factory Service Manual, in this case in the Front & Rear Axles chapter. If you don't have the FSM, click here and download it in PDF format for free.

 

when i siad i had bought just the guts in another thread, everyone said i was crazy for doing it and i should take it to a tranny shop and have them do it....

thanks for the help man, i appriciate it

 

so you can just take the pumpkin apart he the open diff out and just throw in an lsd????? i thought that wouldnt work ie things would break like half shafts. please tell me if i am wrong cus this would save me a buch of money

 

YAYYYYYYYYYYY! i did it......and took it for a test drive...... very nice

no wierd sounds at all, there is small play but i was told that was normal. its really really small play. other than that its awesome!

 

Why would that break halfshafts? The halfshafts are the same whether your FC came with an LSD or not.

 

o i was just under the impression that the ends (tips)where differnt but like i said if i heard wrong please tell me. so let me get this right all i need to do is just a buy an lsd unit and that is it. just money and time. and i could have two wheels insted of one ?????????????? :P