47rh

[Chester8420]

I am planning on putting a 47RH behind a diesel without a ecm. So, could someone please kindly explain to me exactly how the 47RH works, and what imputs it would need to operate properly? Also, what would be invloved (if possible) to get a 47RE to work? Thanks in advance.

 

[ttbird]

I have a 47rh but still have ecm. The only thing that the ecm controls is overdrive lock up with a sensor that tells it is above a certain temp. (I think it's 70 degrees). I have read that you can up 1000 ohm resisitor and fool the ecm. But your not going to have a ecm. I would call Dave Georend and ask him for advise. He a great guy.

 

[83 crew cab]

all you need for the 47rh is 2 swithcs on for the overdrive and one for the converter both needs grrounds to make them work the power wire is the one in the middle of the connector on the transmission hope that helps

 

[Chester8420]

all you need for the 47rh is 2 swithcs on for the overdrive and one for the converter both needs grrounds to make them work the power wire is the one in the middle of the connector on the transmission hope that helps

So the transmission itself senses load and modulates the shift pressures accordingly. . Right?

 

[raychem]

The pcm on the 47rh uses the speed output sensor and the tps to enange the tc lock-up and od. the pcm determins "load" based on tps position and speed sensor input.



Richard

 

[Chester8420]

Thanks. I called ATS diesel, and they recommended an Allison 2400. So I may stay away from the dodge trannys unless there's a good reason to use it.

 

[wicked6]

Depends on what you want & what your budget is. . transmissioncenter.net has a recipe for a 518 to 47rh conversion which does not require an ecm. . There's also some info in the archives for ya, FYI... .

 

[Chester8420]

Thanks guys. If ya'll come up with a stand alone transmission controller for under $1,000 just let me know.

 

[JStokes]

Two Switches

That is all you need to control this transmission. One for lock up and one for overdrive. You can drive without either one almost anywhere.

 

[Chester8420]

I really appreciate all the help. The 8. 3 conversion is on a temporary hold, until funding arrives. I have to concentrate on finding a truck first anyway. If anyone spots an F-350 for cheap, (blown motor or transmission) let me know.

 

[6BT-Dakota]

all you need for the 47rh is 2 swithcs on for the overdrive and one for the converter both needs grrounds to make them work the power wire is the one in the middle of the connector on the transmission hope that helps

This is correct. It is what I have on my Dakota. I dont have a TPS hooked up but I have a 4th gear switch and soon to have a lock up switch. The 4th gear switch operates a solenoid that when you are in 3rd you flip the switch and it will go into 4th. I basically use 3rd around the city and dont switch it into 4th unless im highway traveling. The only thing you need to remember is that you need to switch back from 4th to 3rd when you come to a stop after getting off the highway cuz the tsolenoid is still open or closed (whatever makes 4th gear work). But this does work.



ROb

 

[Chester8420]

Well, I bet that gets annoying. There's just no good transmission to use is there?! There are tons of companies that make complete stand alone controllers for the ford electronic trannies, but they can't be built as strong as the 47rh according to suncoast.

 

[6BT-Dakota]

It really isnt as bad as you would think but I dont drive the truck every day. It is only used for shows and when I feel like taking it out.

 

[zstroken]

Get a pressure switches for the OD and lockup. Use the govenor pressure of the pump, to turn them on. 1 psi ~= 1 MPH. If you could find a differential pressure switch you could us the differential between the throttle pressure and governor pressure to control them. Basically whenever the differential is high you are in OD and lockup, whenever the differential is low(you have the throttle pushed hard) you are out of OD and lockup. I suppose you could even put a seperate pressure switch on the TV circuit, use the normally closed contact and anything above x psi will open the lockup and OD.

 

[Chester8420]

Interesting idea. Where would a person go to buy an adjustable pressure switch?



Thanks for your help guys. I wish I had enough money to get this going right now. I've figured out most everything about the truck, but I'm not that familiar with auto trannies. I'm also trying to design an engine brake for the truck as well.

 

[wicked6]

transmissioncenter.net. . They have the pressure switches and diagrams / instructions to help you make this EASY. . zstroken's differential pressure switch idea would work, too. .



FWIW, my setup is "semi-automatic". . I used their oil pressure switches, a dash toggle for OD on/off, and I cobbled up a poor man's TPS using off the shelf limit switches & custom bracket mounted to the throttle assembly. The WOT switch opens the 12v+ to the center pin on the TCC / OD connector, and idle switch opens the ground to the TCC pin (unlocks TCC when you let off the DIESEL pedal). Between IDLE & WOT, the oil pressure switches control lock up and OD...



Good links to have:



https://www.turbodieselregister.com/forums/showthread.php?t=80091&highlight=47rh+swap



Kick Down photos:



https://www.turbodieselregister.com/forums/showthread.php?t=162869&highlight=47RH



Wiring the VSS:



https://www.turbodieselregister.com/forums/showthread.php?t=162142&highlight=47RH



Stand alone controller:



https://www.turbodieselregister.com/forums/showthread.php?t=152842&highlight=47RH



(edit)



My poor man's TPS:



https://www.turbodieselregister.com/forums/showthread.php?t=145999





HTH -



Linc

 

[Chester8420]

Thank you very much.