'75 Rear end "re-do" Gears, shafts, etc

[chuzie]

Starting a thread to document the changes I am making to the 9" rear axle on my '77. The housing is from a '75 so it is the medium duty/ large bearing variation specific to the 74-75 model years with the 10" drums.

I have been running stock 3.50 gears, 28 spline axle shafts, and Lock Right to turn my 35s for many years. I frequently find I do not have the ability to turn the tires like I should in some off road situations. That, combined with the broken axle shaft incident at URE last November, I have decided to "re-do" the rear end.

Here is what is on the menu:
4.56 gears
31 spline super duty axle shafts
9" master overhaul kit
31 spline side gears
Rock guard

Ideally I would have preferred to upgrade my Lock Right to something stronger, but I do not have the funds available just yet so I will have to risk destroying the lock right for now.

I realize the USA Standard Gear is a value set but they are made by Yukon just not polished as much. Noise is not a concern considering I am running aggressive rock crawling tires. 35x12.50R15 Pit Bull Rocker Radials (bought those today too :biggthumpup

Unfortunately, when you change gearing in the rear, guess what else you get to do? That's right, spend more $$$ to replace the front too!!! :banghead:

My front axle is from a '77. It has the stock 3.50 gears as well as a Lock Right. I installed a chromo inner and outer on the right side in 2009 after a break and for some stupid reason (money), I did not purchase one for the left. I am taking this opportunity to rectify that as well.

So the menu for the front is as follows:
D44 master overhaul kit
Left inner and outer chromo shafts
4.55 Gears
Rock guard

The total for the above items was around $1,375 from Jeffs Bronco Graveyard and Randy's Ring and Pinion

Parts were ordered today but since I am still deployed, things will have to wait until I get home.

Stay tuned for more... :popc1:

[GOODOLEBOY84]

chuzie you can pick up the 9 inch detriot lockers on ebay front the nascar teams farily cheap, just look for one that is a b case, it is the correct bearing size for your case

[broncosbybart]

chuzie you can pick up the 9 inch detriot lockers on ebay front the nascar teams farily cheap, just look for one that is a b case, it is the correct bearing size for your case

what he said.

I have a D-44 detroit for sale... Hint, Hint. 9" detroit is already gone. That said, I have had good luck w/the lock-rites as well. Come back soon!

[Crawdad]

Thx for creating me a parts list! I'm looking forward to this upgrade! Good luck & come back safe!

[chuzie]

I looked and there is nothing available right now Any other suggestions where I can get a used one cheap?

The lock right has ALWAYS been faithful but i am concerned with the new axles and tires and gearing it may be come the weak link.

[chuzie]

chuzie you can pick up the 9 inch detriot lockers on ebay front the nascar teams farily cheap, just look for one that is a b case, it is the correct bearing size for your case

Define "cheap" so I have an idea what I should be going for price wise. I did find one for $325.00 but that seems high.

[chuzie]

Anyone? Does $325 for a used Detroit Locker sound like a deal or not?

[broncosbybart]

Sold mine for $275 and thought that was fair. If it were me, I'd probably wait a bit unless this one is either brand new or used a few times.

[chuzie]

Pretty sure it is used and there is no rush with it. Just want to get the parts together.

[chuzie]

Maybe someone can answer this question for me....
As you know, I am looking at picking up a Detroit for my '74 9" 31 spline from ebay too.

Does anyone know what variants of the Detroit locker I can get and be able to change out to the 2.891 bearing? I know the Detroit P/N for our application is 187s-17b but no one on ebay uses those part numbers for used stuff. In other words, I am pretty sure I need a locker with a journal of 1.785. The question is, which of these larger bearings (3.062, 3.250, etc) already installed on these lockers also share the same journal diameter I need to accommodate the 2.891 bearing?