MY6 New Process A-883

[gchemist]

I need help on an MY6 New Process A-883. What type of oil does it use? Trannys were used around 85-86. Does anyone have an owners manual to check?

[LEEVON]

I have an NP833, but I am using regular 80w-90 gear oil after researching. I'd be curious to know if the owner's manual has something else.

[Keith Seymore]

It uses ATF.

I can check to see what the owner manual says and report back -

K

Originally Posted by Keith Seymore

Not sure what made me think of this, but I just was remembering another story concerning the 'lil red truck....


The "You Pig!! You Pig!!" Story -


Back when we lived in Arizona, so it would have been around 1990 or 1991, I needed to pull the trans out of 'lil Red. As some of you know, in Arizona the weather is so nice that there's no need to work in the garage, so I commenced to tearing the truck down right there in the driveway.

I made it as far as having the trans cut loose, crossmember out, etc and was in the process of dropping the trans down onto my chest when I accidentally hooked part of it on the emergency brake cable, pitching it rearward. The MY6 trans that I have uses automatic trans fluid, so it flows fairly freely....

...which is exactly what it started doing - running down my arm and the driveway and generally soaking everything within a three mile radius with ATF, including me.

Unfortunately (or fortunately, depending on your perspective) this was the exact moment when my oldest, then probably 4 or 5 years old, decided this was the absolutely most appropriate time to come outside to ask me if he could have a piece of gum. He caught me unawares in this most delicate situation and was exposed to the most vile, the most foul string of expletives that I could muster, which was (...and I quote...): "YOU PIG!! YOU PIG!!".

Shocked and obviously wounded, he went running back in the house, great big crocodile tears jumping off his face, to tell his mother that I was yelling at him and calling him a pig (...why he didn't ask her for the gum in the first place I'll never know). After calming him to the point where he could be left alone again she came out and asked me "what-the-heck" was going on. I explained the situation to her satisfaction, dodging any repercussions or demerits for my parenting skills or lack thereof.

At any rate, I got the truck put back together and it has been fine since then but, more importantly, we got a good story out of the deal that we still like to tell every so often, particularly around the Holidays.



As for James, his sense of timing really hasn't improved much in the intervening 19 years or so.



As for me, for the life of me I still can't remember why I needed to pull the trans....



K

[Keith Seymore]

Originally Posted by LEEVON

I have an NP833, but I am using regular 80w-90 gear oil after researching. I'd be curious to know if the owner's manual has something else.

How's it shift with the gear oil in it? Seems like it would be pretty stiff -

K

[LEEVON]

I don't know yet, haven't shifted it. I will be switching to ATF...was hoping you'd chime in! gchemist sorry I almost steered you wrong!

[INSIDIOUS '86]

It's a dodge trans basicly see what dodge recommends they never screwed around with drivetrain IMO.
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[hatzie]

My 1969 Dodge Polara 500 has a refitted A833 using pedals from a 69 Fury. I use GL4 80W90 gear oil. It's the factory fill in the 1969 Fury I pulled it from.
There's an article in Mopar Muscle about this. http://www.moparmusclemagazine.com/t...r/viewall.html

That being said. Keith has direct information from GM engineering about the care and feeding of the GM MY6 variant of the A833.

[86c20]

i have atf in my sm 465 as the truck came from the cool out west. lets just say she wines like a pig

[MusicMan70]

I used the Amsoil recommended in this article and it shifts smoothly.

http://www.customclassictrucks.com/t...n/viewall.html

[Keith Seymore]

Sorry - no "Mopar" documents at my house...



but - I do have the factory literature that came with my truck:

Owner Manual, Warranty Booklet and Maint schedule -



and the Maint book says:



RPO MY6 = ATF

K

[hatzie]

Originally Posted by Keith Seymore

Sorry - no "Mopar" documents at my house...

K

That's OK she won't hold it against you... The old girl is just about ready to be put in drydock for the winter.

[gchemist]

Thanks Keith, you da man!

[Keith Seymore]

Thank you; btw - here is a link to a pretty good article that I refer to on occasion:

http://www.customclassictrucks.com/t..._transmission/

K

[dracko]

Not to hijack this thread, but I was just reading that article on CustomClassicTrucks website and considering finding an A883 transmission for my 1964 c10. I will be putting a rebuilt 1968 327 in it soon and would really like an OD trans.

To put one of these A883/MY6 transmissions behind a small block do I need to find one out of a Chevy ? Or could I use the Mopar version? If so, do you use the mopar bell housing mounted to the sbc?

Any additional info would be a big help. THanks.

[MusicMan70]

Another link with some info...

http://www.classicjunkyard.com/new_process_a833.htm

Pretty sure you need the chevy bellhousing and the chevy version. i put one behind a GMC V6. They have a specific bellhousing, but using the Classic Truck article and this link as a guide, I was able to do it. Be advised that some of the Classic Trucks article photos and captions do not jive and may not make sense.

[LEEVON]

I bought my NP833 without the bellhousing, but got lucky and found one. There are two types, one has the gm pattern, and the other which I believe is more common literally has a mopar bolt pattern on the left side and gm on the right. I was able to locate one in a junkyard far away through the interwebs but that was a miracle...also keep in mind the bearing retainer OD is different than GM, so technically you could use a GM bellhousing with the standard pattern NP833 but you'd have to machine the retainer opening. The junkyard guy who had mine also claimed there were some hydraulic clutch versions without the clutch ball boss...not sure about that but who knows. Also, the shifter is a Hurst unit but the linkages are special as is the base. The only way I'd buy another one of these is complete. I believe all of this was covered in the articles mentioned above, just giving you my Cliff's Notes.

[dracko]

Hey MUsicMan, thanks for that link! I just read through it and it has some really good info on this swap. I agree, that CCT thread is pretty confusing with the pics not matching the words, I had a couple head scratching moments before realizing what was up. haha

Thanks for the pics and advice Leevon, after building an old triumph part by part, I seriously OD'd on searching around trying to piece things together bolt by bolt.

I agree, best to just find a GM unit that is complete and go from there. Might take me a while but sounds like a better option than a T5.

[85Bowtie]

Chrysler originally specified ATF. I've always used 80w-80 gear oil with no shifting problems. Do make sure you have the linkage adjusted correctly with the correct linkage hooked up....they differ between B bodies and E bodies so it's possible to get a frankenstein trans setup.

[dracko]

Hey guys thanks again for the advice on this trans. I ended up buying one off ebay yesterday that comes complete with bell housing, shifter, linkages, so I'm hoping is a pretty straight forward swap.

Wondering if I will need to fabricate a custom rear cross member to support the tailshaft of this trans? My truck is a 1964 c10.

[LEEVON]

Keith, I can totally relate to your story LOL. Although I've never called my one of 'em a PIG they have heard a few choice words in the garage. It seems like whenever I'm out there my wife likes to take a nap, next thing you know little ones are running in the street with scissors!

[MusicMan70]

dracko Re: MY6 New Process A-883

Hey guys thanks again for the advice on this trans. I ended up buying one off ebay yesterday that comes complete with bell housing, shifter, linkages, so I'm hoping is a pretty straight forward swap.

Wondering if I will need to fabricate a custom rear cross member to support the tailshaft of this trans? My truck is a 1964 c10.

If it was the same one I saw, yes it was very complete. I have 61 suburban and the original SM420 did not require a crossmember. I used this one from Ebay and cut it down to fit, but I'm sure there are other ones as well. Your frame is different than mine.

[dracko]

Thanks for the info Henry. My sm420 (sm465?) also has no rear crossmember. How much is that crossmember kit?It looks good but I might try to weld something up if it isn;t too complicated. Is there some kind of hard rubber between the trans and crossmember to absorb vibration/shock.

Thanks again. Dan

[MusicMan70]

Think it was around 50$ maybe more. I don't weld so I bought this and cut it down. I have the X-frame. I used this Energy Suspension mount.

[dracko]

Nice! Thanks for the pic, that really clears it up. I'll do some looking around for a similar setup or at least use the ES mount to make one.
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[496bb]

Anybody know where I can find a GM tailshaft housing for a NP440? Got a 4wd version, and was wanting to use it in my 69C20. Thanks, and not trying to hijack thread- seems to be some good info here from those who have actually dealt with the np440/a883