What can be said about the 4-speed New Process NV833 overdrive manual transmission?

[Keith Seymore]

Originally Posted by hatzie

It's a Competition Plus made by Hurst for use by GM on the MY6 & MM7 A833. A lot of the OEM side mount shifters from the 50's through the 80's were Hurst units.

This is absolutely correct.

When I ordered my '87 it was placed on "stop order", because Mr Gasket was buying out Hurst and GM wasn't sure they were going to get enough shifters to support volume production.

My truck was built on a temporary deviation to use up the 100 or so transmissions that we already had in house.

K

[Gregski]

Originally Posted by hatzie

The MM7 is the 4x4 version.
The MY6 is the 2WD unit you just bought
.
It's pretty much the same aluminum case NP A833 Dodge used in the Ram trucks with a GM input shaft and output spline count.
Make sure the countershaft plug seals properly and the countershaft isn't rotating in the case.. And don't use gear oil in it...

Thank you, but what do you mean "don't use gear oil in it" than what should I use and why?

[hatzie]

Originally Posted by Gregski

Thank you, but what do you mean "don't use gear oil in it" than what should I use and why?

The aluminum case A833 from the 80's used Dexron III... Gear oil is too heavy. The rumor is they changed something and you'll burn out the countershaft needles. Best case the heavy oil makes it shift strangely and use more fuel.
You can't use Dexron VI in them according to GM.
The GM 88861800 fluid is cheaper than the Mobil ATF "Dexron III compatible" fluid that lists compatibility with GM 88861800 on the back label.

Bulletin 04-07-30-037E: Release of DEXRON-VI Automatic Transmission Fluid
"Any vehicle that previously required DEXRON®-III for a manual transmission or transfer case should now use P/N 88861800. This fluid is labeled Manual Transmission and Transfer Case Fluid."

You can't use Dexron VI in most power steering applications where you could get away with Dexron III either... OTOH There's a TSB for my Impala and several other mid size GM cars from the aughts that says to replace the power steering fluid with Dexron VI... Roll with the changes and try to keep up.

[Keith Seymore]

Originally Posted by hatzie

The MM7 is the 4x4 version.
The MY6 is the 2WD unit you just bought

Just clarifying this point:

MM7 is the "merchandised" option code.

MY6 is the "non-merchandised" option code.

The merchandised option code is the one the customer selects (ie, "I want a manual overdrive trans", or "I want an automatic trans"). The non-merchandised option code is the specific trans, in terms of capacity or gear ratios, that the engineering release charts choose on the customer's behalf, taking into consideration powertrain, GVW rating, etc.

It doesn't really matter when there is only one trans part number offered, but when there are multiple choices then it becomes significant.

Example: let's say you want a "three on the tree":

You tell your dealer and he chooses the "merchandised" option "MM3" = manual trans 3 speed.

From that then the engineering charts choose non-merchandised RPO M62 or M64, depending on the first gear ratio required for your specific powertrain and GVW.

Another example: you say "I want the manual trans with a creeper gear".

Dealer selects the merchandised option "MM4", but there is only one part number available, the non-merchandised option M20, so the two option codes can be used interchangeably.

K

[Tom]

Good lord $950?!?! I see several for $700 or less on car-part.com across the nation, heck for that price a used T56 should have been pretty easy or even a TKO. Hope its everything you wanted!

[Gregski]

Originally Posted by Tom

Good lord $950?!?! I see several for $700 or less on car-part.com across the nation, heck for that price a used T56 should have been pretty easy or even a TKO. Hope its everything you wanted!

Tom I hear you, but I've been looking for one in California for over a year and I have only seen one other listed, and it just so happens it was near the same town of Bakersfield, ha ha and that one sold from under my nose for $650 plus $78.16 for shipping on eBay with a Buy It Now option it did come with a bellhousing, but no shifter and linkage.

Like I said earlier I am trying to justify the purchase by saying mine came with the shifter and linkage, bellhousing, pedal assembly (which I may not need) and crossmember.

Does the one for $700 from Car-Part.com ship for free or do you have to pay extra for shipping? Shipping transmissions across the country aint cheap. Fed Ex freight wanted $250 to ship one from Michigan to California.

[barry1982]

I have got two of these NV833 or A833's . Both of mine came as factory equipment in 1982 GMC half tons with 6.2 Diesel. Both trannys have an aluminum bell housing with cast iron tranny bodies and non hydraulic clutch.
They shift well, and I like the tall overdrive on the highway. At 65 MPH on a summer day the 6.2 / A833 in a two wheel drive pickup I have made 33 MPG (Imperial gallon) Im in Canada. If your looking for one of these transmissions, try checking bone yards for early 6.2's

[AnotherWs6]

Originally Posted by Gregski

Tom I hear you, but I've been looking for one in California for over a year and I have only seen one other listed, and it just so happens it was near the same town of Bakersfield, ha ha and that one sold from under my nose for $650 plus $78.16 for shipping on eBay with a Buy It Now option it did come with a bellhousing, but no shifter and linkage.

Like I said earlier I am trying to justify the purchase by saying mine came with the shifter and linkage, bellhousing, pedal assembly (which I may not need) and crossmember.

Does the one for $700 from Car-Part.com ship for free or do you have to pay extra for shipping? Shipping transmissions across the country aint cheap. Fed Ex freight wanted $250 to ship one from Michigan to California.

A hundred bucks or so one way or another, who cares? If it were something sold on Amazon I could see being miffed at not getting a GREAT price, but these things aren't growing on trees still and most importantly - you have it at your home now.

[Gregski]

ok wanted to share some close up pics of the bellhousing

now see how this bellhousing has six transmission mounting holes, I heard people refer to it as dual bolt pattern, as in you can use it to mount two different transmissions to it depending on what you got, so like a Muncie SM 465 would use four bolts and the New Process NV833 would use another four bolt combination

However, and you will see this when I post the pics of the transmission, my New Process A833 (or what ever the correct model reference is) actually has the matching six bolt holes.

So the 64 million dollar question is do you need 6 bolts to mount this beast?

and guys be gentle if I am driving you crazy with dumb questions I am trying to learn something here, and maybe help others too if they come across this later on in the future, thanks

[Tom]

Originally Posted by Gregski

and guys be gentle if I am driving you crazy with dumb questions I am trying to learn something here, and maybe help others too if they come across this later on in the future, thanks

Its all good, everyone else is learning too.
As for those junkyard trannys, no they did not include shipping. In the end as long as your happy with the outcome thats all that matters. For what I paid for my M20 plus its two rebuilds and new case I could easily had a T56 in the truck, but that just wouldn't make me happy.

[Gregski]

ok, so here is the full frontal of the New Process 440 or NV833 aka A833 MY6 option

note the six mounting bolt holes

do you need all six, or is this so that it can mate with a variety of bellhousings, could it even be a transmission case with a bolt pattern that is shared with its MOPAR cousin?

and again, remember there is no such thing as dumb questions, only dump people asking questions, ha ha

[walkerb]

I would think that if the 6 holes line up(833 and bell housing) that you would want to use them.

Or are you thinking that some of the 6 bolts might interfere with something?

[MalibuSSwagon]

Ahh it appears your transmission has both GM and Dodge mounting patterns. It also seems that later bells also have both mounting patterns, my 2 hydro bells have both patterns on them, GM would just put gray plastic plugs in the 2 unused holes. This bell is shared with the SM465 as well.

[Gregski]

Originally Posted by MalibuSSwagon

Ahh it appears your transmission has both GM and Dodge mounting patterns. It also seems that later bells also have both mounting patterns, my 2 hydro bells have both patterns on them, GM would just put gray plastic plugs in the 2 unused holes. This bell is shared with the SM465 as well.

Thank you Eric, since I am anal, can you point out to us which 4 holes are for the New Process transmission and which ones are for the Muncie?

[Gregski]

Originally Posted by MalibuSSwagon

Ahh it appears your transmission has both GM and Dodge mounting patterns. It also seems that later bells also have both mounting patterns, my 2 hydro bells have both patterns on them, GM would just put gray plastic plugs in the 2 unused holes. This bell is shared with the SM465 as well.

So that's interesting it appears both my transmission and the bellhousing have dual bolt patterns, makes sort of for that belt and suspenders type of solution.

Had I known this I would not have needed to get the bellhousing, but 1. I didn't know that, and 2. I was too excited when I was buying it, you know how that goes

[hatzie]

Dodge pattern is LH side of the vehicle wider apart than the RH side.
GM are the same distance apart left and right sides.
You could get creative and use 5 or use the bottom and middle top on the LH side...

[dragonball98312]

I wonder which year they changes the bellhousing pattern. Mines from an 81 with a straight 6 and it has the old muncie saginaw bolt pattern

[Gregski]

here is a side by side comparison of my Muncie SM465 bellhousing on the left and the New Process A833 bellhousing on the right so that we can stare and compare the bolt patterns

so looks like I may be able to simply bolt up this New Process trans to my original bellhousing

[MalibuSSwagon]

Well you can always clean it and sell it, or stash it for a rainy day project.

My NP833 is from a 1981 truck, it only has the GM pattern. Interesting I wonder why the change.

[Dazzoman]

Originally Posted by Gregski

here is a side by side comparison of my Muncie SM465 bellhousing on the left and the New Process A833 bellhousing on the right so that we can stare and compare the bolt patterns

so looks like I may be able to simply bolt up this New Process trans to my original bellhousing

Transferring my 1966 GMC SM465 bell housing ( which is radically different from this supposed , hopefully GM and not Mopar NP440 tranny) I just bought will NOT fit my bell . My bell is cast iron and has the little hole ears for the crossmounting ( the 1966 ) plus it allows for my starter with the 3 bolts ( those are better).
The NP bellhousing (s) dont allow for either of that and I found that my old bell has an smaller center mount hole for the input shaft housing as well ! #*@!
Does anyone have any idea what I could do short of retrofitting my old cast bell ? I would have to enlarge the hole and make sure its machined perfect PLUS the weird 4 bolts pattern to match would also have to be done by filling it in so that holes could be made .Heres pic of trans,.
Engine is an 292 , truck is 3/4 ton

[Chevystep]

Originally Posted by Dazzoman

Transferring my 1966 GMC SM465 bell housing ( which is radically different from this supposed , hopefully GM and not Mopar NP440 tranny) I just bought will NOT fit my bell . My bell is cast iron and has the little hole ears for the crossmounting ( the 1966 ) plus it allows for my starter with the 3 bolts ( those are better).
The NP bellhousing (s) dont allow for either of that and I found that my old bell has an smaller center mount hole for the input shaft housing as well ! #*@!
Does anyone have any idea what I could do short of retrofitting my old cast bell ? I would have to enlarge the hole and make sure its machined perfect PLUS the weird 4 bolts pattern to match would also have to be done by filling it in so that holes could be made .Heres pic of trans,.
Engine is an 292 , truck is 3/4 ton

Here's the right bell housing...

http://www.ebay.com/itm/like/1722504...109&rmvSB=true

[Dazzoman]

Originally Posted by Chevystep

Here's the right bell housing...

http://www.ebay.com/itm/like/1722504...109&rmvSB=true

After much thought I dicided to have ears tigged onto the aluminum trans front so that matched bolt holes can be fabricated to fit the 1966 bell .
This will allow me to avoid moving the excisting crossmember(s) , keep my 3 starter bolt hole old style pattern , keep my fork , and retain the protection & strength the iron bell provides as well as the mounting ears for 66 crossmember .
And yes I will also have to have the iron bell hole enlarged to fit to larger diameter throwout bearing housing nose piece (the circle outter edge ) .
One last test tho is to throw on the bell to the block and see if the NP440 will clear the fat belly it has on its frontal bottom . It might hit the crossmember , I dont know yet . Gonna do that tonight

[Dazzoman]

Originally Posted by Dazzoman

After much thought I dicided to have ears tigged onto the aluminum trans front so that matched bolt holes can be fabricated to fit the 1966 bell .
This will allow me to avoid moving the excisting crossmember(s) , keep my 3 starter bolt hole old style pattern , keep my fork , and retain the protection & strength the iron bell provides as well as the mounting ears for 66 crossmember .
And yes I will also have to have the iron bell hole enlarged to fit to larger diameter throwout bearing housing nose piece (the circle outter edge ) .
One last test tho is to throw on the bell to the block and see if the NP440 will clear the fat belly it has on its frontal bottom . It might hit the crossmember , I dont know yet . Gonna do that tonight

Heres an pic of how the old and new nose pieces are quite close yet different bolt pattern,size of O/D lip .
I am able to fit the old nose on the tranny and pop on the old bell as shown
.... the two right side bolts line up perfectly yet the left side has not even an ear lobe on the aluminum trans housing ( heh heh wait til Im done w/ it !)
....And yes the fat belly is all clear of any obstruction , Oh ya - We are on ...

[hatzie]

I wonder if that bell can be used for the 96-01 (Dodge pattern) NV4500... If it can that's some cash for your project. Advance Adapters gets a pretty penny for their conversion bell etc.
The rumor is the 93-95 GM pattern NV4500 is specific to that transmission but I've never seen one to guarantee it.

EDIT: went and looked it up. Ignore my hot air^^^ both bolt patterns of the NV4500 are specific to that tranny... much closer to square than either the A833 or the SM465.

[Gregski]

ok guys lets move on to the shifter, I would like to share some close ups of the shifter that came with the transmission

I noticed the broken shifter knob threads when I was buying it, but it wasn't till I got home that I noticed the stick aka shifter lever is welded into the control mechanism, maybe some of youz can speak to that. I don't recon that's factory, ha ha