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#722911 - April 24th 2017 10:58 pm Transmission Help  
Joined: Jan 2012
Posts: 12
iamthepreston Offline
stranger
iamthepreston  Offline
stranger

Joined: Jan 2012
Posts: 12
South Carolina
I have a 1994 B250 with a 36rh transmission. Jegs has a rebuilt a727 transmisson for @ 950 bucks and I was wondering if it would work. It looks like mine, but it says a727 1967 to 1979 small block. I was wondering if there is any difference after 1979 that would not work. I feel confident that it would bolt right up, but will my TC work and will my drivehaft have the same splines?

Really want to get my old van back on the road.

Thanks for any help and or advice.

Taking it to the local tranny shop for a rebuild is out. I just had it rebuild 2.5 years ago and 12,000 miles later it won't budge.

#723051 - April 27th 2017 3:53 pm Re: Transmission Help [Re: iamthepreston]  
Joined: May 2016
Posts: 15
Irish_Lucky Offline
stranger
Irish_Lucky  Offline
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Joined: May 2016
Posts: 15
Enfield, CT
Sounds like you picked the wrong shop the first time! The biggest problem is all the electronics. The older trannys didn't have all the fancy electronics like your newer transmissions do. Find a better shop, or a used one with a warranty.


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#723054 - April 27th 2017 5:38 pm Re: Transmission Help [Re: iamthepreston]  
Joined: Aug 2001
Posts: 11,367
Reed Offline
Maniac
Reed  Offline
Maniac

Joined: Aug 2001
Posts: 11,367
Fircrest, WA
If your Dodge truly has a 36rh (three speed hydraulic controlled automatic) and not a 46rH (four speed hydraulic controlled automatic) or a 46RE (four speed electronic controlled automatic), then the 727 will swap right in. Driveshaft will be the same, but you probably have a lockup torque converter so any replacement trans will have to also be a lockup trans or the torque converter won't work.

Are you sure your van truly has a hydraulic controlled three speed and not an electronic controlled four speed? By 94 almost everything had gone to four speed electronic control.


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#723069 - April 27th 2017 9:38 pm Re: Transmission Help [Re: iamthepreston]  
Joined: Feb 2007
Posts: 188
doc yukon Offline
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doc yukon  Offline
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Joined: Feb 2007
Posts: 188
Boondocks of Nebraska
the 36rh is just a renamed 727 after 1989 with a lockup torque converter. If you find an earlyer727 with lockup make sure to get the right converter to match the year of the trany.


Political correctness is a doctrine fostered by a delusional, illogical minority, and rapidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by a CLEAN end.
#723155 - April 30th 2017 12:08 am Re: Transmission Help [Re: Reed]  
Joined: Jan 2012
Posts: 12
iamthepreston Offline
stranger
iamthepreston  Offline
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Joined: Jan 2012
Posts: 12
South Carolina
Reed,

Thanks for the info. I actually have two 94 Dodge B250. The one is question came from the dealership with a towing package including auxiliary tranny cooler and brake controller, so I am assuming this is why it has the 36rh. My other 94 has the 46rh. The one with the 46rh gets much, much better gas mileage.


Okay Reed just a few more questions if you do not mind. From what I am seeing here is that all 36rh's have a lock up TC. I would assume mine would not be an exception. Anyway is there anyway I can tell if its lock up. There is absolutely no button to mash anywhere on the inside for lockup. Seems to me if it was lock up there would be a button to push to enable the lock up or cut it off. I swear there is not one anywhere. Do you know how I can tell looking at the tranny? I have it out and can send any pics needed.

Thanks again

PJ

Last edited by iamthepreston; April 30th 2017 12:10 am. Reason: Partially Illiterate
#723161 - April 30th 2017 11:17 am Re: Transmission Help [Re: iamthepreston]  
Joined: Aug 2001
Posts: 11,367
Reed Offline
Maniac
Reed  Offline
Maniac

Joined: Aug 2001
Posts: 11,367
Fircrest, WA
Originally Posted by "Allpar"
A-727 transmissions from their inception until 1966 have 19 splines on the input shaft. Non-lockup 727 transmissions from 1967 onward have 24 splines. Lockup 727 transmissions that debuted in 1978 had 23 splines.

Not all 727 transmissions made after 1978 were lockup; towing package 727 transmissions commonly were non-lockup, and would have the ’67-onward 24 spline input shaft. The A-518 overdrive also has 23 splines. The output shaft has 29 splines.

A-904 transmissions from their inception until 1967 have 18 splines in the input shaft. Non-lockup transmissions from 1968 have 27 splines.

Lockup 904 transmissions appeared in 1978, and have 26 splines. A-500 overdrive transmissions also have 26 splines. The output shaft has 25 splines.

If in doubt, count the splines. It saves a lot of headache and stress later on when you might otherwise discover that you have the wrong torque converter or drive shaft yoke."


Taken from: http://www.allpar.com/mopar/transmissions/identifying-torqueflites.html

In other words, pull the torque converter and count your splines. If the van has a heavy duty towing package, chances are it will have 24 splines.

Alternatively, what does the underhood sticker say? It is on the hood above the battery and lists all the options.

The button on the dash is for overdrive on the four speed automatics. The lockup feature is controlled hydraulically on older transmissions and electronically by the computer on newer transmissions. No user input is possible to control the lockup of the torque converter.

Last edited by Reed; April 30th 2017 11:18 am.

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