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47RE questions

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Old Mar 15, 2010 | 09:41 PM
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47RE questions
Ok, has anyone ever swapped one into a 1st gen, and what did it take to make it all work, or should I forget the idea all together
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Old Mar 15, 2010 | 09:54 PM
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good question. Probably has to do with the electronic control part of the deal.
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Old Mar 16, 2010 | 01:23 AM
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manual valve body is the simplest way.
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Old Mar 16, 2010 | 08:32 AM
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txs
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I would convert it to an rh, you need a 518 or 47 rh OD unit, OD piston retainer and valve body.
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Old Mar 16, 2010 | 11:13 AM
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I have a good 518 in the truck now, but with a weak convertor, picked up the RE with low miles, for a good price. I have changed VBs before, but have no clue on whats involved with changing the OD unit out. How big of a pain is it to do, will it unbolt from the main case, or do you have to take the whole trans apart to do it??
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Old Mar 16, 2010 | 11:26 AM
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JD730 would know.

It would be nice to have another alternative to a 47RH. There are lot's more 47RE's around. Even some 3rd gens came with them.
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Old Mar 16, 2010 | 11:41 AM
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manual valve body, or a stand alone controller. Either option is typically a deal breaker on a 1st gen due to cost.
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Old Mar 16, 2010 | 01:13 PM
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Originally Posted by The_Head
JD730 would know.

It would be nice to have another alternative to a 47RH. There are lot's more 47RE's around. Even some 3rd gens came with them.
The trans I'm running in the truck right now started out life as a 1996 47RE. Like TXS said, you need a valve body, OD piston retainer. You can switch the whole overdrive unit or swap the guts around, which is what I did.

Originally Posted by Fred Swanson
manual valve body, or a stand alone controller. Either option is typically a deal breaker on a 1st gen due to cost.
Don't forget you need a spacer to bolt a NP205 to a 47RE.
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Old Mar 16, 2010 | 07:13 PM
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txs
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The only diesel specific pieces for this swap are the OD planetary, the piece that the clutch discs in the OD unit snap ring into, and the governor wieghts. I think even the OD units that bolted onto the A500 trannies shared the housing and the output shaft. Now the valve body is a different assembly, but there is very little difference between the gasser valve bodies and the diesel ones.
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Old Mar 17, 2010 | 11:07 PM
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Originally Posted by JD730

Don't forget you need a spacer to bolt a NP205 to a 47RE.
why the spacer, if I use the 518 OD unit??
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Old Mar 18, 2010 | 06:04 AM
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You need a spacer if you run a full out 47RE with the RE overdrive unit, if you put a 518 OD unit on it you are making a 47RH.
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Old Mar 18, 2010 | 09:47 AM
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Ok, that makes more sense. Now, if I were to use the 518 OD, and valve body, how would I go about controlling the lockup? or would I need the VB off of a RH to do that?
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Old Mar 18, 2010 | 02:34 PM
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RH valvebody is needed
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Old Mar 19, 2010 | 09:14 AM
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txs
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even with the correct valve body you have to control the lockup function somehow, your pcm has no provision for this. One way is toggle switch, one way is pressure switch off the governor port i believe.
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Old Mar 19, 2010 | 11:31 AM
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yeah I will just toggle it, but first I have to get to that point lol.

Ok, so next question? What can I use the VB out of, other than a 47rh from a diesel? Will one from a gasser v-8 work? And if so does it need to be modified in any way to make it work right?

What a pain, wish I had the money to just have a good RH built, and not have to piece and parts this one together
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