ClassA4x4

I swapped a 47RH into my 93 truck and since there is no wiring provision for the TCC lockup solenoid in the 93 I left the wire open, i.e. not connected.

First question: If I leave it this way for the time being, would it work just like the old 46RH/A518 that I replaced?

Next question, what is the circuit logic in the 1994/95 transmission control module that causes the PCM to energize the lockup solenoid? In the 1994/95 trucks the lockup solenoid is connected to PCM pin 54 and is automatically energized when conditions are right; there's no manual switch to activate lockup. In the 93 truck there's no counterpart of PCM pin 54.

DNRCustoms

Only way you will get the tc to locup is wire in a manual switch which is sweet in my opinion and what I run. Or run a pressure switch and dial that it. You can run a 3 pole toggle. auto off manual and that would be the same thing. there is info in the sticky at the top of the first gen thread section with information on how to hook it up. Have fun

ClassA4x4

DNR, thanks for the response.

I see in your sig you also have a 47RH in your 1st gen. How did you "wire/plumb" the Transmission TV cable to your 47RH? I'm using the original TV cable in my 1st gen, adjusted so that the cable moves simultaneously with the throttle cable (no 0.18 slack as required for the A518); however, I'm having harsh shifts, especially 2nd to 3rd.

I notice that the 94/95 47RH TV cable is a "pull" type, i.e. the cable pulls the trans TV lever from the rear of the transmission; whereas, the the A518/46RH is a "push" type, i.e. the cable pushes the lever from the front of the transmission. Does this make a significant difference in how the transmission behaves?

JD730

Did you use the 1st gen TV lever? That's where the difference is, I found out the hard way. They are clocked differently and you need the 1st gen TV lever with the 1st gen push cable setup in order to work properly. Then you should adjust it as you would for the A518.

ClassA4x4

thanks Mike!

I used the kickdown lever from the 46RH this morning and WOW! what a difference the "wrong" part makes! It runs sssweeeet! Can't even notice the upshifts now. It's definitely the "correct" matching lever for the 93 throttle linkage!

You should see the big grin on my face.

samiam4

very cool...


I transfered the 46RH parts onto my 47rh.


Michael

Racing_Joe66

would one of you guys be interested in doing the trans swap into my 91 d350 2wd truck? the od just went out on me so its time for an upgrade. let me know asap.

also what is all needed for parts to do the swap and what year rh?

thanks

ClassA4x4

If you're in the Phoenix area I'd be happy to assist.

Racing_Joe66

What is all needed to do the swap? I live in Iowa.

JD730

Read these two threads. The both cover 4x4's, but should be the same except you don't have a transfer case.

https://www.dieseltruckresource.com/...d.php?t=114702

https://www.dieseltruckresource.com/...d.php?t=236738