• Hello there guest and Welcome to The #1 Classic Mustang forum!
    To gain full access you must Register. Registration is free and it takes only a few moments to complete.
    Already a member? Login here then!

9 inch rear again...

lethal289

Active Member
Ok, so i just got off the phone with a guy thats parting out a 73. It was a 351 C. car. Along with front disc brakes, it also has a complete 9 inch rear and third member. The data plate on the car has axle code "O" which if its still original has 3.0 Locker. Now the 73 rear is one inch longer then the 67 per side. 2 inch total. Can that be modified, or is it not worth it? If i put it in like that would it be functional or look bad? I guess i could change the backspacing of the wheels. Any input would be great.
 
If it's a locker and a good price snag it and resell the pumkin. Probably not worth putting in the 67 and buying new wheels that still might look funny. Narrowing will be pricey too. Definetly too wide as is. IMO

In fact I need a pumkin (locker) with 28 splines. I have a 31 spline with 4.11:1 (too low), and only 28 spline axles in my 9" I don't have the funds to buy axles and a ring and pinion at the moment.
 
thanks craig, i appreciate all of your help. I have been searching for a decent 9 inch for over a year now locally. There is rarely anything that comes available. Im probably going to look at this car in the next day or two. If its a locker, both wheels would spin together when the rear is off the ground right? I just want to be sure!
 
Narrowing a rear would get very costly considering the options. I'm not a fan of the "mexican" look. As mentioned, a good buy for resell is a good buy. Lethal, I can't remember where you're located but I've got a '74 LTD that is taking up space. It's a complete car that would actually be a great candidate for restore but I'll never do it. My goal is to eventually part it out and get rid of the car. Let me know If there is anything on it that would interest you. Long story but I had to pay $600 to get it towed to my house and the whole car can be had for.....$600.
 
I had the same issue with a rear 3.50 Trak-Loc rear a friend gave me from a 69 Bronco. The rear would not work because of width issues, so I ended up buying a new housing from a seller on E-Bay for around 400$.

If you are interested I can dig through some receipts and find out who the seller was. Long story short, burnouts destroy both tires now. :danc
 
If it's a traction-lok and a decent price grab it. You can keep the chunk and sell the housing to offset the cost of a '67-'70 housing. There were a lot of '67-'70 Mustangs with 9" rears. The housing should set you back more than about $250 at the most (I paid $300 for the housing in my '66, which is a LOT more rare).

If it's a locking rear and the clutches aren't shot, both rear tires will turn in the same direction. Note ... a traction-lok with shot clutches will act just like an open rear and the wheels will turn in opposite directions.
 
"johnpro" said:
If it's a traction-lok and a decent price grab it. You can keep the chunk and sell the housing to offset the cost of a '67-'70 housing. There were a lot of '67-'70 Mustangs with 9" rears. The housing should set you back more than about $250 at the most (I paid $300 for the housing in my '66, which is a LOT more rare).

If it's a locking rear and the clutches aren't shot, both rear tires will turn in the same direction. Note ... a traction-lok with shot clutches will act just like an open rear and the wheels will turn in opposite directions.
yep, a good locker will turn the wheels the same direction. I haven't seen a lot of 9" housings for sale for Mustangs but they are out there.
blue65coupe: what engine is in the LTD? (since the thread isn't completly derailed I had to ask!)
 
"lethal289" said:
I was wondering the same thing. Wasnt a 460 available that year? I bet it would move!
rockauto says there was a 460 car. i don't claim to know diddly about 70s full size fords outside of what i learned watching 70s burt reynolds moonshiner movies, but a parts store's website is never wrong. :rofl

On a somewhat unrelated note, my cousin owned a 77 Mercury wagon that had supposedly been ordered with a 460 PI motor and it still holds the local record for longest burnout. from what i gather, it had some get up and go for a 5000lb barge. :rofl
 
I have had several 429/460's and even stock they do have gobs of torque! When I was younger (teens) My dad bought a 73 Mercury 4 door barge that had a 429. He bought it cheap to resell. I wanted it bad! My neighbor bought it and beat the crap out of it but it was quick! I always wanted a Big Block after that!
 
This one has the 351C. A little over 100K on the clock and was a 1 owner car. It was my wife's g'father's and he just had to make sure I got it. The only thing wrong with it (besides not being cranked in 10 yrs) is the vinyl top. That thing is straight as an arrow. Now, it just sits under a tarp. If I don't sell it I'm gonna pull the drivetrain and do who knows what with the car. I'll never restore it. Now the '76 F250 with the 460...torque is an understatement. I also have a '72? F100 with 390, 4x4, 4 sp granny that will literally tow a house. That sucker is mean. It's sitting right now also if you know anybody that wants it. F250 ain't for sell.
 
"lethal289" said:
Ok, so i just got off the phone with a guy thats parting out a 73. It was a 351 C. car. Along with front disc brakes, it also has a complete 9 inch rear and third member. The data plate on the car has axle code "O" which if its still original has 3.0 Locker. Now the 73 rear is one inch longer then the 67 per side. 2 inch total. Can that be modified, or is it not worth it? If i put it in like that would it be functional or look bad? I guess i could change the backspacing of the wheels. Any input would be great.
Ok, just to put this one to rest, it looks like the search will continue. The guy doesnt have a title, and i dont think the data plate is for this car. From what i can tell, it was not a 9 inch rear end. Going by what i could find, there was no hump on the housing, and it looked more oval, so i am going to say it was smaller. bummer.
 
Back
Top