Join Date: May 2005
Thanked 2 Times in 2 Posts
I had mentioned something in the other thread about the Ford having the best transmission out there. What makes it the best is BTS. Besdies that the way it shifts as in the physical mechanical characteristics of it (not the feel)is much better than the allison and they seem to be able to hold up to more power than the built dodge trannys and cost about half as much to fully build. Give brian at BTS a call and he can explain it to you pretty well.
The basics of what he was telling me about the Ford tranny vs. the Allison and how they shift is the Allison has to unlock one clutch and lock another. This gives a feeling of the truck slowing down then hitting hard as the 2nd clutch engages. The Ford however has sprag clutches (a one way clutch) so that the 2nd clutch pack engages before the first one completely disengauges makeing the shifts feel like it's pulling the truck out from under you rather than slowing then going again. What the sprag clutch does is it allows the shaft to speed up away from the 1st clutch that is still partially engaged because the first clutch only holds the shaft while under power but if the shaft spins faster than the clutch it will freewheel.
Not sure if I explained that well but hopefully you'll get what I'm saying.
I haven't personally been in these transmissions so maybe someone who rebuilds them regularly can chime in and correct me if and where I'm wrong. This is just how it understood what was explained to me.
'96 F-250 Extended Cab, GT'S injectors, GT'S intercooler install kit, custom turbo kit with a little HX40, Swamp's BIGEST oil.
466 on #2 only
739 with NČO
13.544 in 1/4 mi!
"If you think you can do a thing or think you can't do a thing, you're right." Henry Ford
Yeah I can keep up!:Thumbup: