howdy, hope this is in the right forum.

anway: I'm about to drop some change on a Cummins setup for my old K30 work truck. The engine is supposedly an 89, with a 97 47RE. I am curious if it's going to live behind that motor, and what can be done to help it along. I'm not going to be hammering the truck until everything is up to snuff, so whatever will make the most difference FIRST, then work my way along.

Valve body???

 

As long as it's all apart do an air test on the tranny seals- if any one of those is leaking you can only band-aid it. (Or take it apart and put in new seals)
Then it should be a VB. (You could ask Bill Kondolay at DTT what he thinks and how to adapt the tranny to the vehicle)

AlpineRAM

 

What about the computer to run the 47RE????

 

Welcome to DTR... Think you means 47RH??

RJ

 

There are a couple of companies making a stand alone computer to control these transmissions now, ---what a world of possibilities

 

He means 47RE not RH. RE is electronic controled and RH is hydraulic. 47RE's suck behind power. I just went through this and $2600.00 later, I'm not very knowledgeable but I know a little. "You don't have to be a plumber to know not to stick your hand in the garbage disposal." Anyone know anything about APPS's?

 

What do you mean??

 

It may be a 47RH: it's a '97 tranny. I thought the email said RE, I could be mistaken.

I'll probably have it rebuilt when I get it back to UT.

 

I agree. Why do the 47re's suck behind power? All I've got in mine is a valve body from DTT and it's holding up to 398hp/820tq of daily driven abuse. A built 47re is probably one of the greatest trannies out there. Some people claim that they are even stronger than chevy or ford's trannies when comparably built. I can not justify that claim, just repeating other's.

 

Thanks for the info. Didn't know that.

RJ

 

I apologize for the confusion. A think (opinion) a stock 47RE sucks behind power. I currently have a built 47RE and like it, but both of my buddies who have diesels with power mods have destroyed their trans. Mine never made it that far. The 47RE ( a redesigned 727 which is one of the best ever) was designed for gas engines and I feel can't hold up to diesel torque (opinion).

 

while I certainly find the side discussions... informative LOL...

anyone else have an opinion on

a. whether that's a 47RE or RH? and
b. what the most effective upgrade would be??

and no, of course I don't mind meandering threads. Lots of information, and I have almost no diesel experience. Whole new exciting ball of wax.

 

Ad A: take a picture of the electrical connector of the tranny. Then it will be clear which one it is.
B: IF the transmission is in a very good state (all seals OK clutches not worn etc) doing a pressure test and upping the line pressure to the max pressure that's stated in the service manual will be the most cost-effective modification.
If it isn't that good you will need new seals because with the low rpm of the diesel engine a small leak will kind of outflow the pump and therefore the pressure to hold the clutches simply isn't there. I'd suggest that you call the vendors like DTT (I'm using their stuff and I am happy with it) and talk to them- they do have a little different design philosophies that will make each of them more or less suitable for your application. (driving style, towing etc)

HTH

AlpineRAM