Help ID my rear (center section)?

[696969]

I'm pretty sure I have an 8.75 rear end, but I need help identifying the center section. I can't seem to find any tell tale markings on whether it's perhaps a 742 or 489.

I'm assuming it's a 489, because the car is a '69 Satellite with a 318. I don't see a big "9" however, nor have I found a "2".

I bent the rear right axle and I figure I should know the center section type before finding a new or used axle.

Maybe these pics will help:

 

[A383Wing]

that's not an 8-3/4" rear..that diff you got has a rear cover....

the 8-3/4 rear gear drops out as a unit from the front of the differential housing

I'm gonna say it's an 8.25" rear end

 

[monaco66coupe]

No, you have an 8 1/4 rear end. The pan on the back is unmistakable. I had a 69' charger with the same rear. it was standard, 8 3/4 was optional from 69' forward on 318 B body cars.

I recommend you dump I, and get a good 8 3/4 rear end.

 

[70redbee]

^^^Agree^^^

 

[Meep-Meep]

That cover has an odd crease down the center, but I will agree you have what strongly appears to be an 8.25". These are C clip axles so the cover has to be removed to pull the axles. Really easy.

 

[696969]

Thanks so much for your replies guys. I dont think Im ready to do a whole rear change just yet. I just want to find a replacement axle for the bent one.

So, according to this chart, the 8.75 is the only one that opens from the front?

http://www.mymopar.com/index.php?pid=75

 

[Meep-Meep]

Yes.

The 8.25" will get you by just fine, especially with a 318. No reason to change it unless you will dump a bunch of power through it. I had a couple apart and thought it was pretty stout with fairly large bearings.

 

[Seax440Dodge]

Here's a handy dandy little guide for ya:

View attachment 175973


And if you're scouring the junk yard and need to look for something in particular, here's another handy chart

 

[696969]

if it is indeed an 8.25 rear, are all 8.25 axles created equal and swappable for my application?

For example, would this be a suitable replacement?

http://www.ebay.com/itm/Jeep-Liberty-Rear-Axle-Shaft-02-05-NEW-Chrysler-8-25-/261138189978?pt=Motors_Car_Truck_Parts_Accessories&hash=item3ccd0c8e9a&vxp=mtr

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Here's a handy dandy little guide for ya:

Yeah, I think the second row down, second in form the left is what I have. Thanks.

 

[Propwash]

Do not buy the Jeep axle....... It is not the same.

Different model lines like the A, B, C ect..ect.. bodies had different axle/housing lengths for the same rear ends.

 

[696969]

Do not buy the Jeep axle....... It is not the same.

Different model lines like the A, B, C ect..ect.. bodies had different axle/housing lengths for the same rear ends.

Would the spline count I'm looking for be 29?

 

[Meep-Meep]

I think it's 27 for the older MoPars. You should just pull it, measure and count splines that way you will know for sure. Don't forget new seals and bearings.