Help identifying a833

-
O

oldmodlover

Well-Known Member
Joined
Oct 17, 2015
Messages
438
Reaction score
267
Location
Concord. North Clackalaky
Bought this today.
Kinda , somewhat, know the history of it.
Hoping others on here can share their knowledge.

20210722_182505.jpg


20210722_182424.jpg


20210722_182648_HDR.jpg
 

I wasn't aware there were any non OD four speeds in an aluminum case. Two things about that. I BY FAR don't know it all and someone could have swapped everything into an OD case....so there's THAT. LOL
 
According to the 10,000 day calendar code 5736 after the PP833 that's Monday April 11, 1977. That means unless the guts have been changed, it's an OD.
 
It’s real easy to tell if OD, by shifting to 3rd gear and count the turns. One turn of input then count the output, if less than one turn it’s an OD
 
413 said:
It’s real easy to tell if OD, by shifting to 3rd gear and count the turns. One turn of input then count the output, if less than one turn it’s an OD
Click to expand...

Huh? If it's less than one turn in 3rd, it's a standard 4 speed, since 4th gear would be 1:1, so 3rd would be less.

So is he puts it in third and the output shaft turns LESS then 1 turn to one turn of the input shaft, it's a standard 4 speed, because 3rd in an OD is 1:1.
 
The A-833 was reconfigured as an overdrive transmission using an aluminum case in 1975 and was used in Chrysler cars and trucks for added fuel economy. The overdrive version of the transmission reduced the third gear ratio to .73:1 to be used as the overdrive, and the 1:1 fourth gear became third.
 
Let me straighten this out. Wrench the FRONT shifter shaft CLOCKWISE. this puts the box in 3rd in a straight through 4 speed, or 4th (OD) in an od box

You turn the input 1 turn. If it goes more than 1 turn it's an OD. If it goes less than 1 turn it's a "straight through" gearbox
 
the front bearing retainer on a overdrive is larger than a regular trans , might be quicker just looking at that.
 
silversedan said:
the front bearing retainer on a overdrive is larger than a regular trans , might be quicker just looking at that.
Click to expand...
OK so you look at it, Cool! But it doesn’t tell you what the gears are inside the box.
 
RustyRatRod said:
I wasn't aware there were any non OD four speeds in an aluminum case. Two things about that. I BY FAR don't know it all and someone could have swapped everything into an OD case....so there's THAT. LOL
Click to expand...

I put a non od 833 in a overdrive case. Still have it. Just had the Bellhousing milled to accept the larger front bearing.
 
Kendog 170 said:
I put a non od 833 in a overdrive case. Still have it. Just had the Bellhousing milled to accept the larger front bearing.
Click to expand...

That's why I'm trying to recommend testing to see. These things are so old now, anything's possible.
 
Thank you everyone for their help.
I talked to the guy l bought it from.
All he knew it was a 4 speed that came from a running , driving car. ( aint they all ?) He has had it for several years. Finally decided to sell it.
That is what the guy HE got it from told him.

It was an impulse Craigslist buy for me.
I maybe should have researched it better before buying. No matter now. It's mine. I will deal with it. I may keep it and swap it out one day just to see what happens.
Always an education here.
 
So have you at least determined if it's OD or straight through?
 
This is all too difficult. remove the side cover, now look at the front gear that is on the input shaft. The next gear will be smaller if OD, or larger if a non OD.

photos of an OD from service manual, in both the left is the front of the trans. Main shaft on top, see how small the overdrive gear is?
counter shaft on bottom, see how large the second gear from left is?

this is a radical difference if you have ever looked inside a manual trans.

they gears normal go from small to large evenly, not big to small then bigger.

E5AFE90F-6CCD-4416-B335-88A28ECA3769.jpeg


677F7D1C-5197-41A4-85C7-2C28DD9158F0.jpeg
 
Last edited:
oldmodlover said:
Thank you everyone for their help.
I talked to the guy l bought it from.
All he knew it was a 4 speed that came from a running , driving car. ( aint they all ?) He has had it for several years. Finally decided to sell it.
That is what the guy HE got it from told him.

It was an impulse Craigslist buy for me.
I maybe should have researched it better before buying. No matter now. It's mine. I will deal with it. I may keep it and swap it out one day just to see what happens.
Always an education here.
Click to expand...

I saw that thing on Craigslist the other day. It was cheap enough to be tempting, for sure! :eek: As long as you don't put it behind some high HP motor, it should live fine if you don't jerk it around much. Good luck with it.
 
Early (1975) ODs had iron cases. This one is most likely an OD. It is out of an F-body and WILL fit an A-body with the proper corresponding parts (Bell housing). I had some leftover parts and built a small bearing A-body overdrive in an iron case. Sold it to a buddy of mine for his original '68 Barracuda 318/4sp. He absolutely LOVED the OD, including the 3.09 first gear.
 
You must log in or register to reply here.
-

Back
Top