1. Gryzynx

    Gryzynx Senior Moment

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    I learn something new every day.

    Today it is that A833's were available in GM trucks in the 80's. I believe they were designated as NP440. Aluminum cased overdrive with GM specific input and output shafts. Some were Mopar pattern, but some were GM pattern mounting flange.

    Anybody have any experience with these? Are they usable in A body applications?
     
  2. goldduster318

    goldduster318 Overzealous Car Modifier

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    They have GM bellhousings, special input shafts, & special output shafts. Basically its modded to use the GM bellhousings, and be the same length and mounting points as a TH350.

    So in short, unless you are running a chevy engine, don't even try. The internals like the synchro hubs would be interchangeable though. Most people i've seen call them the NP833
     
  3. mshred

    mshred The Green Manalishi

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    x2...unless you have a bellhousing to run a muncie to mopar, then it wont work
     
  4. TimE

    TimE Active Member

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    I've always heard them referred to as NP833 also. They are an o/d 4spd with the differences as mentioned above.
     
  5. mopardude318

    mopardude318 Well-Known Member

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    I've heard the term NP440 a few times...
     
  6. Overdrive

    Overdrive Entropy User

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    GM transmission code MY6. I have one in my truck. The internals are regular A833 OD. The transmission case, input shaft, input bearing retainer, output shaft, tail housing are all GM specific. It does not bolt up to a regular GM bellhousing as it has a hybrid GM/Mopar bellhousing pattern, so it needs a specific bellhousing. Somewhere along the way they made the pattern all GM apparently. The input bearing retainer is a week spot (I spent two months looking for one that wasn't broken). I would say that if you had a regular A-833 and wanted to change the gearing to an OD gear set, you could probably use the internals, but as a complete transmission swap, it won't work.
     
  7. jdsdart

    jdsdart Member

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    Is the bearing retainer OD larger on the GM version? If so could it be used on the Mopar version so a GM hydraulic throw out bearing could be utilized?
     
  8. 67Dart273

    67Dart273 FABO Gold Member FABO Gold Member

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    I ran into one last summer. Some (nice guy too) guy on CL wanted someone to assemble it. He had done the difficult part and ordered new bearings, stop rings and seals LOL. But then some body offered him more than he could refuse for the pickup and he came got it before I could assemble it!! LOL

    What was odd about this one (I had never seen) is that IT WAS FOR A BOLT ON TRANSFER in a 4x4!!! Had no idea these boxes ever were set up that way!!! I posted it on here "somewhere"

    Here's a photo I found on the 'net

    As mentioned above, these girls came (for GM) with either the Mopar bolt pattern or GM

    a883-018b-jpg.jpg
     
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