Mopar 4-speed overdrive

[whayden2003]

Thanks everyone for the replies and advice.

 

[POMONAMISSEL]

this is an od 4psd from a pickup . there not as strong gear wise as the older a833 4spd's . and most have the double tail stock shifter mounting like 70 up b/e bodies . this one i made a adapter to fit it in an a body .

 

[whayden2003]

Yep. Exactly what the one I saw looked like. Thanks.

 

[Daliant]

If its from a truck it won't have the rear shifter mounting point drilled and tapped.

 

[408Swinger]

I ran one in my 73 340 Dart and in a 83 D150. Worked great in both.
The Dart ran 12s using 1,2,3 and 4.10s.
I could cruise on the freeway nicely.

The truck came stock with the OD and like 2.94ish rear gears which were worthless even on the hiway... I swapped in a 8.75 with 3.91s from a 73 B Van .
Worked great after that!
BTW, I would launch the Dart around 4k and ran 1.64 60 fts...

 

[POMONAMISSEL]

i've had them both ways tapped and untapped . they came in vans as well as the p/us . oh and the shift plates are not the desired one as well , 69 back is the better of them . so its a lighter case , but there is some work to be done to put earlier gears in them . of course if your a lucky son of a gun . you might just find a all alum cased b/e hemi gear box .

 

[whayden2003]

i've had them both ways tapped and untapped . they came in vans as well as the p/us . oh and the shift plates are not the desired one as well , 69 back is the better of them . so its a lighter case , but there is some work to be done to put earlier gears in them . of course if your a lucky son of a gun . you might just find a all alum cased b/e hemi gear box . View attachment 581152

What praytell do you have in that picture??

 

[whayden2003]

Man I'm really leaning to this OD transwith all this feedback.

 

[408Swinger]

Mad Max car....

 

[POMONAMISSEL]

thats a street roadster 27 t turtle deck altered , with a 6-71 blower on that wedge in it , but i'm swapping it out for an old school early hemi and its got an 8-71 blower n hilborn four port injection on it . i'm still keeping that slick shifter hemi a833 trans behind it . should be a fun ride , don't ya think . lol .

 

[whayden2003]

thats a street roadster 27 t turtle deck altered , with a 6-71 blower on that wedge in it , but i'm swapping it out for an old school early hemi and its got an 8-71 blower n hilborn four port injection on it . i'm still keeping that slick shifter hemi a833 trans behind it . should be a fun ride , don't ya think . lol . View attachment 581185 View attachment 581186

That's is super rad sir. That's just plain cool.

 

[rumblefish360]

I don't understand your question.

yes, I believe the B/E 833 and the truck 833 O/D are the same case dimensions.

If that's what you're asking.

Yep! Thanks.

 

[POMONAMISSEL]

you don't need call me sir , my dads still alive . he is sir , lol ;) . and here is a pic of one of them old hemis i have . its a 301 55 windsor poly with 55 300 hemi heads . vintage weiand blower parts n intake . its slated for my 48 a40 gasser project as a 2dr dr sed

.

 

[Dragon Slayer]

As some have stated this can be used on B/E. You also can put your gears into the aluminum case if you want to lighten you normal 4 spd. So you can swap parts. Some A bodies had aluminum transmissions and because parts can be swapped into the housing, the first poster may have an A Body trans with short tail housing.
Normal truck tail housing is long and has both shifter mount locations.

As far as the bearing retainer, this uses the 308 bearing on the input so if it goes to a 70 up 4spd you just swap your large bearing retainer and it will work, bolt pattern is the same as the normal larger 308 bearing retainer. But the overdrive did use the largest of the bearing retain diameter. 5.125" if memory serves me right.

And you can mill down the OD bearing retainer, and use it on a 308 bearing with the larger bell house opening. Have done it. Early cars with 307 bearing and small bolt pattern are the issue.

This is like a normal 4 speed except 3rd gear is direct drive and fourth is the small ratio OD. That is why you reverse the shift lever for 3/4.

You can find these Aluminum housing on ebay. Just make sure it has reverse gear installed. Otherwise the cluster and gears from your normal 4 speed swap right in.
They are a pain to work on because you cannot remove or install the gears until the cluster is dropped down in the case. That larger OD gear on the cluster keeps the tail shaft and gears from coming out until lowered. IF you get one, get a service manual for a truck so you have the info on the trans.

 

[YY1]

No, no.

There are two different bolt circle sizes on O/D 833 bearing retainers.

The larger one can not be milled down without getting into the threaded hole areas.

I guess we need to know what the OP really has.

 

[Dragon Slayer]

No, no.

There are two different bolt circle sizes on O/D 833 bearing retainers.

The larger one can not be milled down without getting into the threaded hole areas.

I guess we need to know what the OP really has.

I do not think that is correct. I believe all Truck Over drive transmissions used the OD 5.125"dia Bearing Retainer with the 4.16" dia Bolt spacing. Which is what the later model 4.805" dia Bearing Retainers used that are for 308 bearings. You can cut them down for that application.

Now if there were some later model A body cars with OD transmissions I do not know what they used, and they may have been small bearing transmissions since the A bodies were small block.

Early normal transmissions with 307 bearing had the 4.35" dia with 3.70" bolt circle. Same for late model small block normal trans. Obviously you can not cut them down for that application.

I have a 70 B body and have cut down the overdrive Bearing retainer to use as a spare. My 70 A833 has the 308 bearing and 4.16" bolt pattern bearing retainer. So cutting the OD unit down to 4.805" works fine.

 

[YY1]

I have one and I'll be happy to show you.

I went round and round with trying to figure out WTF people were taking abut "just mill the retainer".

That absolutely will not work on mine.

At the very least, it would require you to put the bell on the trans with the retainer loose, and then put the retainer bolts in, as the bolt head would not clear!

 

[YY1]

SB 5.125 bell housings are out there and not expensive.

I found one in about 3 months for $100.

 

[mopar 3 B]

Have yet to see a big block a833 od. So they must all be /6 or small block?

 

[YY1]

I have one but it wasn't born that way.

Original /6 truck with 1969 440 and iron bell housing transplanted.