SPEEDSHIFT
New member
Yup, why? Thats what it had originally.
47re problems, what part was this?
- Thread starter SPEEDSHIFT
- Start date
Yup, why? Thats what it had originally.
RandomHero
Unstoppable Diesel
Just heard of transmissions having pressure issues when the 47 pump was used instead of the 48.
SPEEDSHIFT
New member
I got it tore back down and remeasured my thrust plate tolerances and came up with a little more than I originally measured so I am going to put the he .213" thrust plate back in it.
Does this gap look right beneath the last steel and wire snap ring? I can't find a spec for that in my book.
Does this gap look right beneath the last steel and wire snap ring? I can't find a spec for that in my book.
rockjeep73
New member
Clearance to the wire ring looks fine.
Remove the wire ring and lay the OD piston with spacer on that bearing like it would stack up in the trans. You should be around .115" clearance from the piston to the top steel.
Remove the wire ring and lay the OD piston with spacer on that bearing like it would stack up in the trans. You should be around .115" clearance from the piston to the top steel.
SPEEDSHIFT
New member
I appreciate the info! I already put it back together with the original setup though, .223" Haha
At first it did the same flare then started to clear up after a couple miles of cycling OD. Now I think I should have left out the .010" shim because it seems to bind a little while going into OD... i am going to run it some more and see how it does.
SPEEDSHIFT
New member
I drove it to work this morning and that binding is completely gone. Just nice crisp shifts in every gear. I appreciate everyone that helped, I am trying to get this thing ready for the World Finals. :tree:
zstroken
For $$$ your name here
I think too large isn't an issue, other than not applying the OD clutches and possibly letting the OD piston drop out and push the seal. The big issue is if it is set too tight, that the OD clutches and Direct clutches are applied at the same time during a shift.
SPEEDSHIFT
New member
In my mind too loose causes the flare and too tight causes the bind. That tolerance controls the timing from when one OD pack releases and the other applies, right?
I will pull the trans back apart after the race season is over, as I am putting this transmission in my new race truck build.
zstroken
For $$$ your name here
There is an overrunning clutch that will hold even if the direct clutches are shot. So one of the dangers with too loose is allowing the piston to push out of its retainer. The direct clutches are needed for reverse though.