So I'm having a discussion with a guy about the original ST165 4WD systems regarding how they function. We covered the original E50F1 system (driver controlled pneumatic center diff lock) that was released on the original JDM GT-Four and the E50F2 system (viscous coupling center diff lock) that was released to the rest of the world in 1988-1989.
Long story short he claims that both the original system and the worldwide system are basically FWD until wheel slip occurs. I don't think he's right. I think both systems are full-time 4WD with power distribution being 50/50 front and back. I think the only time that distribution changes is during wheelslip, but at a minimum it is always 50/50 front and back.
Here is some reference material:
Original Toyota Canada training video for the introduction of the Celica and Camry "Full Time 4WD Manual Transaxle". Shows exactly how both the mechanical and viscous controlled center differentials work.
Part 1:
http://smg.photobucket.com/albums/v287/YerRand0/?action=view¤t=diff1.mp4
Part 2:
http://smg.photobucket.com/albums/v287/YerRand0/?action=view¤t=Diff2.mp4
Part 3:
http://smg.photobucket.com/albums/v287/YerRand0/?action=view¤t=diff3.mp4
I think we should have a healthy discussion here. Please don't post unless you have FACTS that you can BACK UP or have REFERENCE MATERIAL. I'm trying to make sure this thread doesn't get clouded with BS.
Talk among yourselves.....
Long story short he claims that both the original system and the worldwide system are basically FWD until wheel slip occurs. I don't think he's right. I think both systems are full-time 4WD with power distribution being 50/50 front and back. I think the only time that distribution changes is during wheelslip, but at a minimum it is always 50/50 front and back.
Here is some reference material:
Original Toyota Canada training video for the introduction of the Celica and Camry "Full Time 4WD Manual Transaxle". Shows exactly how both the mechanical and viscous controlled center differentials work.
Part 1:
http://smg.photobucket.com/albums/v287/YerRand0/?action=view¤t=diff1.mp4
Part 2:
http://smg.photobucket.com/albums/v287/YerRand0/?action=view¤t=Diff2.mp4
Part 3:
http://smg.photobucket.com/albums/v287/YerRand0/?action=view¤t=diff3.mp4
I think we should have a healthy discussion here. Please don't post unless you have FACTS that you can BACK UP or have REFERENCE MATERIAL. I'm trying to make sure this thread doesn't get clouded with BS.
Talk among yourselves.....