Continuation of this thread here since the thread was closed.
12V to 3rd gen Hemi - Competition Diesel.Com - Bringing The BEST Together
So Its been a year and half since any major progress has been done, life, kids, etc. But my hand was finally forced as the 545RFE had enough at 536k miles. Wouldn't go past 2nd, and that was in manual shift, if left in D it would try to go to 3rd but end up back in 1st. So regardless it was time for it all to come out as the engine also had a slight head gasket leak between 3 and 5.
Had to put it in the bed for lack of room in the garage. Plan is to refurbish it and put in my Jeep TJ.
So in that time I started really tearing down the 12V. Got the head sent off and cleaned up. At the time I was planning on running a 188 Hamilton came so I told them the valve depth numbers I was looking to stay at. The seats/valves probably could have been run as is but figured it wouldn't hurt to touch them up. They did that after taking a slight bit off the head as it wasn't to bad. Also machined the valve seal area to facilitate the newer top hat seals.
When I was dealing with the bottom end and popped #1 out the bore looked good and so did the rod bearings so I just ordered up some std size mains and rods and new rings with the plan to just hone the bores even though they were probably usable and put it back together. I guess I should have done them all as I got to #5 and 6 a few days later I saw maybe some slight scoring, even though I can't feel it with a fingernail.
Its at the shop now and they'll let me what they think, hoping just a polish will take care of it. The block is also there currently as well to get cleaned and honed. My piston protrusion was already getting close to Hamiltons specs for a cam .022" I think is what I was seeing. But I've decided to stick with the stock cam for now with the power level I'm planning on. 350-400hp. However I did decided to go for some Hamilton springs and ARP head studs.
Should have gotten the heavy parts to the shop when the truck worked
When I took everything I part I kept them together as far as piston numbers. But I didn't label intake or exhaust tappet/pushrod since I was planning on new ones. Now I'm leanings towards keeping the stock ones for now. Any issue with mixing the intake and exhaust tappets? Obviously a 50/50 chance of getting them matched back up. Other option is to get some 24v tappets or Hamiltons in the event I go with a cam in the future, but I would think it'd be best to just do new tappets with a new cam, not relatively new tappets on a new cam since the lobe widths will be different.
Still just meddling into the integration with the truck but I need to get the Hemi tone ring on the front, Its smaller than the
CR one so I guess I'll have to space it out some to be able to get the sensor close enough.
For the trans I have a 47RH that seems to have been recently remaned. Plan is to do a revmax valve body so I guess I'll see how everything looks when I open it up. Then either a revmax or garmon single disk TQ given my expected power levels.
As for mating the NP273 to the 47RH I've read a bunch on how the Tcase input won't reach the output seal of the 47RH and most just seal the two mating surfaces together. So I measured the lengths on my parts and sure enough the nose of the
TC in put (which isn't a sealing surface) would just barely touch the lip of the seal. Its about .25" from the nose of the
TC input to the start of the sealing surface. Well I found one or two threads talking about seal extensions so that got me looking around and turns out its a common thing with the Jeep TJs when swapping to an auto (32RH) from a manual that the input of the TCase will be to short. So one company makes, or did, this extension.
I cross referenced the output seal from a 47RH to a 32RH using timkens seal catalog and sure enough it was the same seal and spaces it out about .43" Which should be plenty. It was only about $33 and is mild steel. You could def. make your own with a lathe as its only two operations, but for the price and it comes with a seal installed its hard to beat. Hopefully that will help some other 47RH/RE guys out when swapping.