New Process A833 4speed w/ OD MY6 MM7

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

HotRodPC

Administrator
Staff member
Admin
Joined
Aug 29, 2010
Posts
47,114
Reaction score
9,266
Location
OKC, OK
First Name
HotRod
Truck Year
85 K20 LWB
Truck Model
Silverado
Engine Size
454 - Turbo 400 - 3.73
Was put into an '86 Silverado cab that had a 305/700R4 in it. I also have the hole cut for the master cylinder, the firewall had dimples where it was supposed to go, grabbed my 1/4" holesaw and made the hole, the dimples were also there for where the pedal bolts came through to mount the master cylinder to, also had the dimples for where my fuel filter attaches to the firewall as well.

That's great info. I'm going to be converting my 85K1500 350/700r4/NP208 to 350/A833/NP208 so I have to install clutch pedals and master cyl. On my 85K10, I think I might be recabbing that one with an 85C20 350/Th400 Cab, so I'd have to take the hump from the K10 and weld it into the 85 C20 Cab. Not sure what's up with all that as of now though. Time will tell. Nice to know the options are there though.
 

HotRodPC

Administrator
Staff member
Admin
Joined
Aug 29, 2010
Posts
47,114
Reaction score
9,266
Location
OKC, OK
First Name
HotRod
Truck Year
85 K20 LWB
Truck Model
Silverado
Engine Size
454 - Turbo 400 - 3.73
Ahhh looky what came in the mail today. I was sure to wipe all the **** off before I took the pic. Speaking of which, I need to go make Inbowhunter another payment for this thing.

attachment.php
 

Attachments

  • A833KIt 006.jpg
    A833KIt 006.jpg
    88.2 KB · Views: 417

89Suburban

Supporting Member
Supporting Member
Joined
Dec 7, 2010
Posts
24,744
Reaction score
6,531
Location
Southeast PA
First Name
Paw Paw
Truck Year
2007
Truck Model
Chevrolet Tahoe LT
Engine Size
5.3, 4WD
Awesome dude, bet that made your day!! :) Gonna do a write up?
 

inbowhunter713

Full Access Member
Joined
Mar 13, 2012
Posts
59
Reaction score
0
Location
Evansville, IN
First Name
Cory
Truck Year
84
Truck Model
K10
Engine Size
350
Glad it made it ok!

Sent from my SAMSUNG-SGH-I727 using Tapatalk 2
 

HotRodPC

Administrator
Staff member
Admin
Joined
Aug 29, 2010
Posts
47,114
Reaction score
9,266
Location
OKC, OK
First Name
HotRod
Truck Year
85 K20 LWB
Truck Model
Silverado
Engine Size
454 - Turbo 400 - 3.73

BillyP

Full Access Member
Joined
Sep 17, 2012
Posts
72
Reaction score
4
Location
Kingston, Tn
First Name
Billy
Truck Year
1985
Truck Model
C10 Scottsdale
Engine Size
6.2 Diesel
Where's my like button?
 

HotRodPC

Administrator
Staff member
Admin
Joined
Aug 29, 2010
Posts
47,114
Reaction score
9,266
Location
OKC, OK
First Name
HotRod
Truck Year
85 K20 LWB
Truck Model
Silverado
Engine Size
454 - Turbo 400 - 3.73
I couldn't resist opening it up to see the small parts.

attachment.php
 

Attachments

  • A833KIt 009.jpg
    A833KIt 009.jpg
    93.8 KB · Views: 395

zieg85

Full Access Member
Joined
Oct 28, 2012
Posts
175
Reaction score
9
Location
Brighton, IL
First Name
Carl
Truck Year
1985
Truck Model
C20
Engine Size
7.4L
Does anyone have a source for the factory or factory like replacement shifter boot for the MY6/MY7 transmission?
 

HotRodPC

Administrator
Staff member
Admin
Joined
Aug 29, 2010
Posts
47,114
Reaction score
9,266
Location
OKC, OK
First Name
HotRod
Truck Year
85 K20 LWB
Truck Model
Silverado
Engine Size
454 - Turbo 400 - 3.73
Does anyone have a source for the factory or factory like replacement shifter boot for the MY6/MY7 transmission?


I hear that's a real tough one. We had a member here say that GM doesn't even have a part # for it anymore IIRC, and we was lucky enough to find one NOS on eBay a few years back.
 

MRTHUMPUR

Junior Member
Joined
Apr 25, 2013
Posts
2
Reaction score
0
Location
TN
First Name
JP
Truck Year
1986
Truck Model
K15
Engine Size
305
I was wanting to know if anyone has listing on how many trucks produced with MM7 manual overdrive trans?? ...or know somewhere to get production figures ??? Thanks
 

HotRodPC

Administrator
Staff member
Admin
Joined
Aug 29, 2010
Posts
47,114
Reaction score
9,266
Location
OKC, OK
First Name
HotRod
Truck Year
85 K20 LWB
Truck Model
Silverado
Engine Size
454 - Turbo 400 - 3.73
That would be Retro to figure that out. I just know it isn't many.
 

MRTHUMPUR

Junior Member
Joined
Apr 25, 2013
Posts
2
Reaction score
0
Location
TN
First Name
JP
Truck Year
1986
Truck Model
K15
Engine Size
305
MM7 A833 overdrive trans

I was wandering about it. I've only heard of very few. I bought a 1986 chevy 4wd short bed a few weeks ago. It has the 4 speed overdrive trans with the flat bar shifter like old hurst shifter. The label with RPO codes in glove box shows MM7 ( 4-speed man trans ). I was interested if anyone had any other information on it.

one of my other trucks that I've had for about 7 years is 1987 chevy short bed 4wd with granny gear 4 speed and has the normal round bar curved shifter.
 

HotRodPC

Administrator
Staff member
Admin
Joined
Aug 29, 2010
Posts
47,114
Reaction score
9,266
Location
OKC, OK
First Name
HotRod
Truck Year
85 K20 LWB
Truck Model
Silverado
Engine Size
454 - Turbo 400 - 3.73
I was wandering about it. I've only heard of very few. I bought a 1986 chevy 4wd short bed a few weeks ago. It has the 4 speed overdrive trans with the flat bar shifter like old hurst shifter. The label with RPO codes in glove box shows MM7 ( 4-speed man trans ). I was interested if anyone had any other information on it.

one of my other trucks that I've had for about 7 years is 1987 chevy short bed 4wd with granny gear 4 speed and has the normal round bar curved shifter.

You scored buddy. And yes, that is the correct RPO code, so the truck was original with that trans, and YES, IT IS a HURST shifter. Just about the same identical shifter as the Hurst Competition Plus, but it does not have adjustable stops on the gates and that's about it. If you take the shifter off, it's got Hurst stamped right on it. It is a Factory GM Hurst shifter.

What other kind of info you want about it? I'd like to see pics of the trucks and the interior, and the Firewall showing the clutch master and all that good ****.

If you haven't already, fire up an Intro Thread and introduce yourself and the truck and/or an Under Construction thread with some pics of your truck. Then whenever you need help with it, or doing work to the truck you can keep record and such of your progress. Take a look around the site. You'll see what I mean. We can use another MM7 truck on the forum. There's been a couple guys come and go, and 1 in the middle of long build, but he hasn't updated in awhile either.
 

HotRodPC

Administrator
Staff member
Admin
Joined
Aug 29, 2010
Posts
47,114
Reaction score
9,266
Location
OKC, OK
First Name
HotRod
Truck Year
85 K20 LWB
Truck Model
Silverado
Engine Size
454 - Turbo 400 - 3.73
I was wandering about it. I've only heard of very few. I bought a 1986 chevy 4wd short bed a few weeks ago. It has the 4 speed overdrive trans with the flat bar shifter like old hurst shifter. The label with RPO codes in glove box shows MM7 ( 4-speed man trans ). I was interested if anyone had any other information on it.

one of my other trucks that I've had for about 7 years is 1987 chevy short bed 4wd with granny gear 4 speed and has the normal round bar curved shifter.

Nice I see yours is a K1500 4x4 too. These did not come behind 350's at all. 4.3, Wee O Fives, and 6.2 Diesels Only. There is 2 different RPO codes. MM7 in the 4x4,'s and MY6 for the 2 wheel drive models. It's been said that the Cast Iron models in the 4x4's are best and stronger than the 2wd Aluminum units, but the other guy doing a build here, has a cast iron unit and it's a 2wd, so apparently, there are some Cast Iron 2wd units that I've been told didn't and don't exist. So it could be that MY6 is the Aluminum model and MM7 is the cast iron model.

As far as gear ratio's, if you look those up, this trans is ALMOST identical to a 700r4 gear ratios. Off by like .0X in any gear. Some will complain about the wide ratio on this trans, but if you compare it to the SM465, the other trans you're speaking of with the granny 1st, the ratio's are no more wider than that trans with exception this one has OD instead of a Granny Low. The SM465 is a stronger transmission, but the A833 comes with a stronger clutch for some reason. The clutch disk is an inch bigger. According to everything I've found on these things, they're pretty damn strong and under rated. If you decide you don't like it, I know there are several members on this forum that will be happy as hell to take it off your hands, BUT, I think it would be a crime if your truck is original with it, and you have the RPO code on the SPID label, to swap it out of the truck. I'd keep that truck as original as possible. Even if you get a new motor, like a 350 crate, I think I'd hold onto that Wee O Five out in the tool shed or covered up. Or rebuild the Wee O Five. It's just a very rare option, so to some of us, it's worthy more than others.
 

Latest posts

Forum statistics

Threads
43,935
Posts
946,042
Members
35,982
Latest member
jake26104
Top