Levi_plummer
New member
- Joined
- May 14, 2012
- Messages
- 346
Thank you sir! I am hoping this will hold some small injectors and an he351 or hx40.
The stock 5 pinion steel overdrive planetary is adequate for most builds and does not need to be upgraded if it's in good shape, I've only seen (1) bad one in about 20 core transmissions.
The first planet on the intermediate shaft, also called the forward planet, is aluminum and (5) pinion on stock 47rh transmissions. For 500 HP/1000 ft-lbs or less, the aluminum planetary will hold up just fine. I actually put 1476 ft-lbs through the aluminum planet in the 47rh on my Junker Drag Truck. It is now going to be upgraded to a used stock 5 pinion steel planet from a 47re (direct swap, just needs the cheap $3 plastic sleeve installed with the steel planet).
The aluminum rear planetary with cogs that fit into the reverse drum do not need to be upgraded till well over 700 HP/1500 ft-lb. There are several aftermarket options available for 5 of 6 pinion aluminum, I've never seen a stock aluminum 4 pinion rear planet break from torque, just destroyed from worn out thrust washers/bushings which could be prevented with custom machined/added torrington bearings.
For what it's worth, the 48re came with a steel rear planet so apparently Dodge/Chrysler decided it was a worthwhile upgrade. I personally won't upgrade my 47rh/re's until I see an aluminum rear planet failure from torque overload.
I believe the Part# for the bearings is D36235CA.
Sent from phone
I believe the size of the bleed hole in the top of that 3 bolt plate controls lockup firmness.