seriously considering building me a 2wd diesel hot rod. using then engine out of my 92...



but I want an auto tranny behind it. been reading on then for awhile now. looks like the 47RH is that way to go. because of the lock up TC


but looking pretty darn expensive when fully built


as far as the 47rh, is their any way to go full manual shifting? don't really want to mess with all the electronics.

any other tranys I should be looking at? wanting mostly a 1/4 mile truck. but I would also like to do some Sunday driving with it. car shows and what not.



any suggestions?

 

The overdrive and lockup functions are both electrically controlled. They can be controlled manually by 2 switches. The rest of the 47RH is hydraulically controlled.

 

Jughead built himself a "hot rod" using an '82 D150 and a 2nd gen 12 valve. Trans is a 727 auto with a manual valve body, he says he leaves it in 3rd most of the time. Rear end is a 3.08 or close to it. For a play toy it works great.

 

in going to imagine that the 727 is alot cheaper to? I would like full manual valve body.


this would be going in a 65 Chevy short bed truck BTW. with more than likely 33" slicks. would hope to AT least run 12's



I was going to put a BB chevy in the truck. but I thik the CTD is a much better option.

 

but will a 727 hold up to a 20 PSI bosted launch on 33X15" slicks? cuz I would be making it do that quite alot.

 

727 is a good trans. I have two that are/were behind 440s, no mods, never a problem, romp on 'em all the time. I saved one when the car went to the scrapyard. Other one came with my '71 New Yorker TNT (370hp 440), has about 80k miles on it now with a TF2 shift kit I put in a few years ago. It will chirp 2nd with 3.23 gears in the 2-ton car at WOT. Very nice trans.

 

and also if I go the rout of 3 speed with no OD or lock up would I be better off converting to a th400 Chevy tranny?

 

Read the article in general diesel forum on here about an allison like in a duracrap, I think I'll be trying that when I build a crew cab.

 

the more I read on the 727 the more I like them.

my only experience with a 727 was in a 89 truck with a 360 in it. the tranny was a piece and it blew up 3 times. most likely it was the rebuilders fault. but it still left a bad taste in my mouth.


but I have now read that the diesel 727 is almost a completely different animal. and other than a valve body and TQ maybe some torque spring? that it will handle almost any thing I can put to it?

 

Send Jughead a PM and he'll tell you all about how to build a 727 to handle whatever you can throw at it.

 

Jughead is the unofficial tranny master around these parts... (Wannadiesel could probably make it official, if he wanted to...)

You can't go wrong with a 727 in a quarter mile. No lock up in the quarter mile isn't a handicap, neither is no overdrive. Only having three speeds is a slight handicap since the Cummins only has ~2000 RPM of usable powerband, but a good torque converter coupled with a lower rear end ratio could make up for that (although that will be harder on the driveline then having a 4 or 5 speed transmission and a higher rear end ratio). The 727 is just as strong as anything out there, and can be found behind many a cars with parachutes installed.

With a good torque converter from Goerends or Suncoast and a valve body it could hold anything our engines have been proven capable of. And after it does grenade, it's the easiest transmission to put back together, and aftermarket pieces for it are ubiquitous.

 

( ubiquitous.) WOW can we make that the word of the day?

 

Hello guys, I have a 1992 D2500 Cummins Diesel automatic in my old 75 D200.

I want to get my hands on a spare trans for my truck, just in case.

I have looked at the vin# info from Dodge and that printout says my trans is a 46RH in the standard equipment area of the document? In the optional equipment area, the trans is called HD. What do I have.

My truck has od lock out button. Do any of you know what trans I have.

Also do any of you know the ECU number for the 1992 D2500 Automatic 2WD?

Reg

 

Okay, lets see if I can remember how it goes...

46's are A-518's; A-727's with an overdrive attached. RH means hydraulically controlled, RE means electrically controlled. RH's are what we have.

47RE's and 47RH's are A-618's; these are A-727's with an overdrive and a lock up torque converter.

I believe 48's are heavy duty 47's. I haven't ever been inside of any of these, so I don't know what kind of structural differences there are between the 727's through the 48's. I don't even know if they changed bell housings between the models...

And the "A" in front of 727, 518 and 618 stands for "aluminum".