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New Process A833 4speed w/ OD MY6 MM7

Discussion in 'Manual Transmission & Clutch' started by HotRodPC, Jul 9, 2012.

  1. HotRodPC

    HotRodPC Administrator Staff Member

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    Sooo, part of the reason I've been looking for prices and parts on the elusive A833/NP440. A guy sold one on FB Square page not long ago for $900 for a 2wd and that didn't even include the bell housing.

    I've still not acquired clutch pedals, slave and clutch master for my 85K10, the truck is set up for 700r4 so I'd have to do all the for the conversion too which will cost me more cash I don't seem to be able to come up with, and shit is getting rough around here again with me not working full time and some medical issues costing me time away from work and more expenses, I'm thinking I may have to my sell my 4x4 A833 set up. Of course I'm not going to be willing to just give it away either.

    Not asking for buyers at the moment, but for opinions on pricing. If a guy can get $900 for a 2wd A833 trans and shifter that needed rebuilt and that's all, Wouldn't $1000 for a 4x4 Cast Iron A833 trans, with OEM Hurst Shifter, Bell Housing, 32 Spline NP208 Transfer Case that bolts to the trans, and the Rebuild Kit I have for the transmission be a fair deal?
     
  2. CSFJ

    CSFJ ----------------- Supporting Member

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    As long as the $900 wasn't a fluke, then I guess it would be a legit asking price. Unless the 2wd ones are even more rare.
     
  3. HotRodPC

    HotRodPC Administrator Staff Member

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    They are all rare. I've heard of about 7 and it might be a 4 to 3, so it's pretty even for the few I've heard of as far as 2wd or 4wd. IIRC, there is a guy on here that even has a 2wd unit that is Cast Iron instead of aluminum when it's been said, the 2wd unit are aluminum, and the 4x4 units are stronger and cast iron. Though I don't recall ever seeing a 4x4 unit for sale anywhere, other than a complete truck which was a member here also. One advantage to the 2wd unit that might make it a bit more desirable is the fact that I know a couple of people I've seen on the internet who have used them in cars, like a 65 or 66 Impala a guy used one and cut part of his floor board to make room for the shifter linkage.

    The cast iron 4x4 unit also has the adapter for the Transfer Case built into the tailshaft of the transmission. That's why the 4x4 unit can't be used in a passenger car. The 4x4 unit also uses a thicker output shaft of 32 spline as a Th400 uses and the 2wd unit used the 27 spline Th350/PowerGlide output shaft.
     
  4. CSFJ

    CSFJ ----------------- Supporting Member

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    Interesting. I knew from the comments on here that they weren't common, but I didn't realize they were that scarce either. I may need to start searching for a rebuild kit so I can maximize the return on the one I found.
     
  5. HotRodPC

    HotRodPC Administrator Staff Member

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    Rebuild kit is no problem at all. You can get the $149 rebuild kit from ebay with all new bearings, seals and sycnchos. For the $188 kit and it also includes a new countershaft pin.

    http://www.ebay.com/itm/Chevy-Stepv...-87-/370708032051?hash=item564febaa33&vxp=mtr

    http://www.ebay.com/itm/Chevy-Stepv...Kit-/370411828694?hash=item563e43f5d6&vxp=mtr
     
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  6. Keith Seymore

    Keith Seymore Full Access Member

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    Sorry to be joining the discussion late -

    MM7 is the "merchandised" RPO and "MY6" is the "non-merchandised" RPO.

    Basically one is available to the customer to choose and then the powertrain charts/engineering specifications drive the correct detail.

    It is perhaps easier explaned by using a different transmission as an example: the three on the tree Saginaw was available in the Squarebody with two different first gear ratios, a 2.54 and a 3.50 low gear.

    The customer would say "I want a three on the tree" and choose the merchanised RPO MM3 (aka three speed manual trans). The engineering specifications would then drive the appropriate specific trans, non-merchandised RPO M62 or M64, depending on the rest of the desired powertrain (2wd vs 4wd, rear axle ratio, GVW, etc).

    MM4 (merchandised RPO) => M20 (non merchandised) => SM465 four speed, including the creeper gear

    Same thing happened with automatic trans (MX1 = non overdrive; MX0 = overdrive automatic).

    It is perhaps overkill when only one transmission of a particular type is available, but the system was structured to handle the proliferation of truck drivelines, which were/are mind boggling.

    K
     
    Last edited: Jul 14, 2015
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  7. Keith Seymore

    Keith Seymore Full Access Member

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    This is correct.

    In fact, the transmission RPO was "stop ordered" in the fall of 1986 because Hurst was being acquired by Mr Gasket company.

    I ordered my '87 pickup during that timeframe and was tracking it's progress through the preliminary build process. I called about once a week to determine where it would be built (Flint Assembly) and when (tentative date established).

    After a while I didn't hear anything, so I called again to be told that my truck was on stop order, because of the transmission and the acquisition I just described. The Material people were not sure they were going to be able to get enough shifters during the transition period to support production.

    I was pretty bummed and was formulating a Plan B (change to three on the tree, install a Saginaw four speed with a Hurst floor shifter) when, one day, I was walking through the assembly plant and passed by the Motor line. There were pallets and pallets of these transmissions stacked up, just sitting there.

    I called the material manager over and asked "...how many of these do you think you have?"

    "Prolly a hunnert" he said.

    I said "don't cha think we should build 'em out?"

    He agreed, so I ran back to my office and pitched my idea to my boss, who is the guy that approved such things.

    So - he wrote a Temporary Build deviation to build a quantity of 100 1987 model year pickups with the MY6 trans (one of which happened to be mine).

    K
     
    Last edited: Jul 14, 2015
  8. HotRodPC

    HotRodPC Administrator Staff Member

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    That's very cool. You still have it today?
     
  9. Keith Seymore

    Keith Seymore Full Access Member

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    Yes. I drove it off the assembly line myself; I owned it for four years and then sold it to my father-in-law when I was promoted and received a company owned vehicle.

    He had it for 18 years and when he passed away in 2008 the family asked if I wanted it back.

    I took it back and restored it cosmetically during the summer of 2009. It has been my daily driver since. 215,000 miles. It is the most pleasant driving vehicle I own.

    K
     

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  10. DoubleDingo

    DoubleDingo When In Doubt, Throttle Out

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    That is some neat history on that truck! To order it, and get the factory to add a different transmission code, and then to drive it off the line, and also still own it...priceless...
     
  11. Keith Seymore

    Keith Seymore Full Access Member

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    Thank you; I started an introductory thread so that we would not get too far afield on this one.

    http://www.gmsquarebody.com/forum/showthread.php?p=278260#post278260

    K
     
  12. Keith Seymore

    Keith Seymore Full Access Member

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    I hope my explanation of "Merchandised" vs "non-Merchandised" RPOs was helpful.

    I didn't read the whole 18 pages of thread; were there other questions or things that didn't make sense?

    K
     
  13. CSFJ

    CSFJ ----------------- Supporting Member

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    Made sense to me.
     
  14. HotRodPC

    HotRodPC Administrator Staff Member

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    I got it. In short, one is special order truck code, the other just standard coming down the assembly line truck.
     
  15. Keith Seymore

    Keith Seymore Full Access Member

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    Negative. The codes represent the content, and don't change depending on if standard content or if added content. It's more like an added level of detail.

    I thought of perhaps a better example: If you look at your SPID you probably have "Power Brakes" denoted as J50. However, you or I would describe the system as having brake components assigned to JB5 or JB6. So the customer would specify "power brakes" and choose RPO J50 but the engineering release charts would determine the actual system of JB3/JB5/JB6/JB7 or JB8, based on other criteria like GVW.

    Incidentally - every truck is a "sold" unit before it is built, so every truck is "ordered". Meaning even trucks that are being built for dealer inventory (rather than an individual customer) have been ordered to contain the specific content they are built with. It's just some are ordered by individuals with specific content in mind, and others are ordered "in bulk" with more generic content for dealers to have sitting around.

    K
     
    Last edited: Jul 16, 2015
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