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Unread 01-27-2010, 10:38 PM   #1
BlackDaddyZJ
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1994 ZJ 
 
Join Date: Dec 2008
Location: Hanover, MA
Posts: 769
46RH swap

Can you swap out a 46RH and use the 47RH which ive heard is the same thing just more for heavy duty applications without any other major mods?

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Bob
'94 ZJ
5.2L
IRO 4.5" Lift
35x12.5 Mickey Thompson Baja MTZ's


98 5.9
Restored and daily driven
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Unread 01-28-2010, 06:31 AM   #2
zachreynolds
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Join Date: May 2009
Location: Cushing, IA
Posts: 55
Your biggest problem if I understand this correctly is that on our jeeps the starter is on the passenger side. They didn't make a 47rh with the correct side starter, let alone the right bolt pattern. Now what you can do I believe is remove your 46rh and rebuild it with 47/48 parts (planetery gear sets, wider bands, drums to accommodate more clutches). I know that you can also use thinner steels and "thinner" clutches to stuff more clutch counts into the transmission. What I don't know is if using your 46rh valve body in its stock form would be up to the challenge. But I also don't know if it would be best to install a reprogramming kit for a 46rh, or for a 47/48rh. I believe that the valve bodies are pretty identical as far as layout (the separator plates are probably different, but the basic stuff is the same I believe.) Someone with some more knowledge might be able to answer these questions. I've been toying around with the same idea that you have, although I do know that it gets relatively expensive to start putting in new planetary sets (around 200ish a pop, and there are three separate sets). And for the power that we are putting out on a stock 5.2l it would be overkill. But it would just be cool if it were feasible. Someone with more experience speak up on this!! Correct me if I am wrong!

-Zach
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Unread 01-28-2010, 07:06 AM   #3
baxy
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Join Date: Mar 2009
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get a rebuild shop to rerplace all the 46 innards with 47 innards
I don't see the advantage unless your not telling us you are running 400HP and 38 inch tires
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Unread 01-28-2010, 08:31 AM   #4
ratmonkey
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Join Date: Dec 2006
Location: , Pennsylvania
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the 47rh was used behind motors with a different bell housing pattern than a v8 magnum uses.
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