Is this input shaft smoked?

[thedave8]

Traded this 833 for my 518, didn't notice this "stepped" input shaft until now while scraping all the gunk off it .....have a feeling it shouldn't be like this‍
PS...I know it's upside-down

 

[66fs]

Trash.

 

[Inertia]

If it were mine, I'd polish the shaft then take it, and an original pilot bushing to a machine shop and see if they could make me a new bushing.

 

[1WildRT]

Use the later design bearing, instead of being in the deep small diameter hole it is driven into the large diameter hole

It should ride on the undamaged area of the input shaft..
Original bushing

Newer bearing design

 

[mbaird]

Or just sleeve the input shaft .

 

[1WildRT]

Or just sleeve the input shaft .

To accurately sleeve the input shaft the trans needs to come apart, the shaft mounted in a lathe & turned to a undamaged surface then a sleeve made pressed on, preferably with the sleeve heated to expand it creating a tighter fit... Then back in the lathe to set the finished diameter...

Before doing all that It would be easier & cheaper to replace the input shaft...

Select by Category - Mopar A833 4-Speed Transmission & Component Specialists

 

[thedave8]

Use the later design bearing, instead of being in the deep small diameter hole it is driven into the large diameter hole

It should ride on the undamaged area of the input shaft..
Original bushing
View attachment 1716476115

Newer bearing design
View attachment 1716476119

I like this idea, thanks for sharing.....any specific application I should look for?

 

[dano]

I like this idea, thanks for sharing.....any specific application I should look for?

I believe 90's trucks with 5 speeds had these. It fits in the converter hub. If your crank is not drilled deep for a 4 speed, you may need to trim the input shaft end. I'd polish that, Mic it and see where your at.

 

[thedave8]

I believe 90's trucks with 5 speeds had these. It fits in the converter hub. If your crank is not drilled deep for a 4 speed, you may need to trim the input shaft end. I'd polish that, Mic it and see where your at.

Thanks, I'll do some measuring

 

[1WildRT]

Mopar Performance P4876056AA Mopar Performance Pilot Bearings | Summit Racing

Fits small blocks 65 & newer including magnum, fits big block, Gen 2 & 3 Hemi

 

[thedave8]

Mopar Performance P4876056AA Mopar Performance Pilot Bearings | Summit Racing

Fits small blocks 65 & newer including magnum, fits big block, Gen 2 & 3 Hemi

Awesome, thanks a lot!!

 

[AJ/FormS]

have a feeling it shouldn't be like this‍

That can be spray welded and machined back to perfect.

 

[mopar head]

That shaft looks like it was made that way, wonder if it`s an early 80`s GM truck trans? supposedly they used them for a few years.

 

[1WildRT]

That can be spray welded and machined back to perfect.

Yes, it can.... But like mentioned in post 5 & 6 in order to do a spray weld repair the trans has to come apart, the damage machined, the spray applied & the shaft machined back to spec... At that point it's cheaper to just replace the shaft....

I've done these types of repairs, on heavy equipment, or industrial equipment, or stuff you simply can't get parts for it's a viable option... But an input shaft for an A833 is available & less than $200... If you are able to do the repair yourself it might be an option, but if your paying for the machine work $200 ain't getting it done...

 

[Daves69]

That shaft looks like it was made that way, wonder if it`s an early 80`s GM truck trans? supposedly they used them for a few years.

Thinking the OP might want to do some quick measuring to make sure a bearing will be on what's left of the .750" diameter. Picture looks like it should.
Somewhere here Brewers has posted their dimensioned drawing.

What I've found on a 440 auto crank for some reference.......

 

[thedave8]

That shaft looks like it was made that way, wonder if it`s an early 80`s GM truck trans? supposedly they used them for a few years.

According to the Passon A833 book it is a 1972 trans IIRC, I am pretty sure GM didn't use Mopar A body spec mount/ shifter location short tail shaft A833s but I could be wrong

 

[AJ/FormS]

If it was mine;
I'd have that outta there in ~15 minutes, and already be in the car driving to the machine shop.
Then I'd fix whatever else needs fixing, cuz you just know there will be other worn-out parts in there.

 

[Dan Brewer]

Couple more drawings for reference. Looks like you should be able to use the input as-is with this style bearing: PILOT ROLLER BEARING/ADAPTER - Mopar A833 4-Speed Transmission & Component Specialists

 

[thedave8]

Thanks guys

 

[thedave8]

Couple more drawings for reference. Looks like you should be able to use the input as-is with this style bearing: PILOT ROLLER BEARING/ADAPTER - Mopar A833 4-Speed Transmission & Component Specialists

View attachment 1716477017

View attachment 1716477018

Thanks for the pictures, I am going to order a rebuild kit from you for this transmission, as well as shifter rods, tabs, and shifter adapter plate.... according to the 10,000 day calendar, my trans is 3611 which supposedly is June 17 1971.....
Does that sound right? I want to be sure to order correct kit

 

[Dan Brewer]

Thanks for the pictures, I am going to order a rebuild kit from you for this transmission, as well as shifter rods, tabs, and shifter adapter plate.... according to the 10,000 day calendar, my trans is 3611 which supposedly is June 17 1971.....
Does that sound right? I want to be sure to order correct k

Yes, late 71 transmission.

 

[thedave8]

Yes, late 71 transmission.

Cool, thanks

 

[RustyRatRod]

If it was mine;
I'd have that outta there in ~15 minutes, and already be in the car driving to the machine shop.
Then I'd fix whatever else needs fixing, cuz you just know there will be other worn-out parts in there.

uh huh.