New Guy/47RH Swap Info

[SMcCoy]

Hello 1st Gen Forum,



I’m a new guy to the TDR who has just recently acquired a wrecked ’92 W250 that’s been in the family since new. The front clip and frame were damaged, but the motor and drive line parts are salvageable so I’ll be combining them with a ’67 Power Wagon 250 that I’ve owned for many years. Should make for an interesting CTD truck.



My first question is about swapping the 5spd Getrag for a 47RH Auto from a 2nd gen. Although I’ve done some searching on transmission swaps, I’ve not found any solid material yet about the electrical/ECM considerations of my proposed swap. The 5spd ’92 did not use a TPS sensor, while the automatic trucks in that era did.



Will my current 5spd ECM support the swap, or does the 47RH need additional “electrical” throttle position input that I’m not aware of? The reason I’m selecting the 47RH over the 47RE is due to the fact it wasn’t computer controlled to the best of my knowledge. I realize I’ll have to find a new adapter plate and starter housing etc…



Anyone have any advice or “been there done that” knowledge to share? How about any auto transmission related parts that they want to sell, as I’m starting from scratch with nothing.



Thanks for the help from a new member who’s glad to be part of the forum!

 

[Excessive Force]

'92 W250

I've got a friend who is looking to convert from an automatic to a 5spd. he can't seem to get an auto to last . The one he currently has lost 2nd gear. His truck is a '91. 5 W350,he may be interested in any parts you don't need . such as clutch pedals,steering column,linkage,etc. maybe you could swap some parts. let me know. thanks

 

[nmanalo]

smccoy, I converted my truck from an auto to a 5spd. The ecm for the 5spd will work but you will lose overdrive and cruise control functions. You will need the auto ecm, trans cooler{on pass side of engine}, coolant temp sensor{on drivers side of engine}, it prevents the auto from shifting into od if its below a certain temp, cooler lines, brake pedal, "auto" steering column-with shift lever, flexplate, trans cooler hoses and fittings,one is on the lower rad hose housing on engine and the otheris on the upper rad housing, trans linkages, instrument cluster- has the prndl indicator, starter lockout pigtail loop- on wiring harness next to left kick panel and associated wiring to the trans, tps sensor and coolant sensor mentioned earlier. I don't think there is a difference between the adapter plates on first and second generation auto equipped trucks? Please correct me if I'm wrong. Don't forget the od/cargo light switch in the dash also.

 

[SMcCoy]

Thank you for the responses.



This information sheds a little more light on the swap.



nmanalo – great info!



Excessive Force- yes, and standard transmission related equipment (and some other items since I plan to swap the drive-train into an older model truck) are available for sale or trade. Pedals, column pieces, hyd. clutch parts, flywheel & pressure plate, etc…



You or your friend can e-mail me at -- email address removed -- with any parts wanted or needed. I would be interested in any automatic trans. related hardware he might want to get rid of.



S. McCoy

 

[nmanalo]

smccoy, forgot to tell you about the different driveline lenghts. The auto with tcase is longer than the manual with tcase. If you can get both drivelines from the auto truck, the swap will be much easier. You won't have to lengthen the front driveline and shorten the rear if you do this!!! I'm assuming your truck is a 4wd.

 

[cerberusiam]

47RH conversion

Here is what I found converting to a 47RH. You will need a different starter, different converter adapter for the lockup converter, probably a new set of cooler lines if you haven't replaced the originals. You will rpobably have to shorten the rear diriveline and lengthen the front. As far as the OD and lockup, two switches will do the same thing as the ECM. OD and lockup functions need a constant 12v source and ground the curcuit to activate them. The other choice is buying an aftermarket controller that does the same thing. There is one available for the lockup but I am not sure about the OD. As for the transcooler I would use one that is seperate from the radiator just because the hassle of getting verything right and still running the chance of anti-freeze in a high dollar transmission. The addition of a trans-temp gauge and warning light will negate the need of a trans-temp cutout. Make sure any transmission you get is '96 or later as these trans have parts that will interchange with the gas trannys and the cost will be considerablt less. I you want a real good source of info call Bill Kondaly at Diesel Transmission Technologies, he knows his stuff on the conversion and diesel. Good Luck.

 

[Paul Herioux]

See my posts in Wwalden's thread.

 

[bvanetten]

Pauls instructions work. I used them to install a 47rh in my truck.



Bruce

 

[SMcCoy]

Thanks again for the info. Now I've either got to come off the cash for a professionaly prepared trans or find a used one that can be rebuilt to H. D. specs...



Anyone know of any high volume Diesel Junk Yards with a decent reputation?