9" pinion bearing. N-case

[Madgyver]

I have 2 sizes, 1 much larger than the other. Is this normal with the Nodular case pinion support ?

 

[Yeller]

Is the outside bolt pattern larger? Or just the bearings? If the bolt pattern is larger it's not a 9" technically anyway. It's a 9-1/2" an anomaly. If the bearings are bigger it's a Daytona version which is a good thing.

 

[broncosbybart]

The daytona uses a bigger bearing than stock. You can find them at Summit or one of the other big parts houses. Sorry, I don't know the part #'s offhand.

 

[Quick & Dirty]

Many of the factory N cases came with the Daytona pinion carrier. The Daytona is machined flat all the way around the bolt mount area. The regular support has raised areas at each bolt.

Daytona on left, regular on right.

 

[broncnaz]

And to help answer the question yes the daytona pinion support used on nodular centers uses 2 different sized bearings. Most parts stores should have them or be able to get them.

 

[Madgyver]

I just realized my contributor status expired.. I can't post pic no more...
Looks like I have the Daytona pinion support. Thanks for the pics Quick...

I also noticed that there is no crush sleeve in it but a solid sleeve.

 

[Madgyver]

Here it is..........

 

[Madgyver]

Here is what happened..... .........

 

[red hot71]

There's a guy on ebay that sells just that cover and its billit. I paid about $100.00.

 

[Quick & Dirty]

Hmm. My N case had the same thing in it. Maybe they were installed that way;D.

 

[broncnaz]

Broke mine a few years back exactly like that. To much skinny pedal on the street and 31in tires. Very common breakage for trac locs. I went with a billet steel one then a few years later did this. The billet steel survived and Im still running it. Id recommend the billet steel one if you intend on keeping the trac loc.

 

[Madgyver]

Where can I get the billet steel part?
Post links please..

 

[75junebug]

I'm in the process of replacing the chunk housing in mine, after breaking the small internal pinion bearing mount in the housing for the 2nd or 3rd time. I'm looking at the Yukon 3.25 N housing with the adapter races for 31 spline axles. Are you saying the entire pinion support is of a larger size than the one from a regular chunk? I cant really tell from the pics, and from what I have read from various vendors while looking for a beefier .306 or .325 bearing chunk.

 

[Quick & Dirty]

Are you saying the entire pinion support is of a larger size than the one from a regular chunk?

The center pinion bearing is larger with the Daytona support. The support is externally the same size, so it can bolt in any case. It requires a shorter yoke (from nut to front bearing) to make up for the added bearing length. The third bearing, in the case itself, is the same. No room to go bigger. Nodular iron is less prone to crack than grey iron, so that helps.