[weikel81]

i bought a 95 auto locking front differential for my 94 manual locking pickup and i was just wonder what the difference is between them, the auto locking one has some knid of vacuum on it with lines running to it but i have nothing to connect to those lines because my truck is manual locking hubs. can i just switch them out even though those lines wont be connected or should i switch the axles shaft from my old one to the new one because that is where the vacuum type thing is located and it looks like i can just switch them.

any help would be great
thanks

 

[rivethed]

sounds like you pisked up an ADD front diff, and you need a lot to use that funtionality (switch, VSV's, etc). My recommendation would be to use vacuum to engage the diff, cap the vacuum tubes, and us it with your manual hubs. less headaches.

In case you are brave, here is a link to the ADD system:

http://personal.utulsa.edu/~nathan-buchanan/93fsm/suspensionandaxle/26addcontr.pdf

 

[fourwd1]

Here is some info on defeating ADD that might be useful.
http://www.4x4wire.com/toyota/tech/add/