I put my t100 on jack stands, put the manual trans into h4. back right wheel turns, nothing in the front wheels. I remove the vacuum lines to the front differential, at the differential, and the front wheels now turn. Bad vacuum solenoids or ADD? Where can I buy these parts? I replaced the vacuum lines weeks prior.
4x4 won't engage on 1995 Toyota T100
by jimboshieldo in Cheltenham, PA on January 29, 2011
ANSWER by Lil G on April 30, 2011
I'm having the same problem out of my 4WD T100. The part that engages the front differential goes by a totally different name then they give you. It took me a bit, but I found the part that you need. Here's the information from AutoZone: "Motormite/Transfer Case Switch" For your 1995 Toyota Truck T100 Pickup 4WD 3.4L EFI DOHC 6cyl If you need any more help you can reach me on this website