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Rear end info

Ron 73

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Anyone else have a 9 1/4 rear end in a 73-74 Satellite? Im trying to find out if someone put this in or it came with it, Most ive talked with say they have the 8 1/4 in theres, im told they did use them (9 1/4) in 72 and newer but if im understanding it right, it was only with the BB engine, Mine came with a 318, IF that was the truth told to me. Id appreciate any info you guys know about these, mine works good, id just like a lower gear in it maybe, it is a heavy car, small engine it would help it i think, A little more TQ.. Thanks.
 
Do you know what ratio is in it now?
I dont recall there being a 9.25 in a satty with a small block from the factory.
Even my 74 GTX has the OE 8 1/4" in it, and thats a big block 4 spd originally. Hummmm.

I feel a 3.55 would help ypu, whats your rear tire size?
 
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Do you know what ratio is in it now?
I dont recall there being a Dana 60 in a satty with a small block from the factory.
Even my 74 GTX has the OE 8 1/4" in it, and thats a big block 4 spd originally. Hummmm.

I feel a 3.55 would help ypu, whats your rear tire size?


A 9.25 is not a Dana 60! A Dana 60 is 9.75" and is a totally different animal than a 9.25.

9.25 rears were used in some 73 and up B-Bodies. I believe it was an option. 8.75's were still used in B-Bodies in 73-74.

72's used either the 8.75-340/400, 8.25-318/slant 6 or Dana 60 for the 72 RR GTX which had a 440. My original 72 340 RR has its original 8.75.
 
71-4B's got the 8.75 pretty much only on HP cars and wagons. Have had several BB's with the 8.25. They started using the 9.25 in 74 and some late 73's
Myself I've had over 60 71-4B's and never one with a 9.25
The 71-4B 8.75 is alot harder to find than the 70 and older or even the E-bodies.
 
Do you know what ratio is in it now?
I dont recall there being a Dana 60 in a satty with a small block from the factory.
Even my 74 GTX has the OE 8 1/4" in it, and thats a big block 4 spd originally. Hummmm.

I feel a 3.55 would help ypu, whats your rear tire size?


I'm alittle confused. A 74 GTX 4-spd w/ 8.25?
A GTX comes with a 440 right?
72 was the last year of a 4-sp w/ a 440
A 400HP 4-sp should have an 8.75 or 9.25
 
I'm alittle confused. A 74 GTX 4-spd w/ 8.25?
A GTX comes with a 440 right?
72 was the last year of a 4-sp w/ a 440
A 400HP 4-sp should have an 8.75 or 9.25

I know, I was a little confused to as I never heard of a 74 440 4spd RR GTX esecially with an 8.25.

I was lucky that my 72 340 RR still had its 8.75 intact. Most E-Bodie with the exception of /6's had 8.75's.
 
I'm alittle confused. A 74 GTX 4-spd w/ 8.25?
A GTX comes with a 440 right?
72 was the last year of a 4-sp w/ a 440
A 400HP 4-sp should have an 8.75 or 9.25

No sir! I have on my hands a documented 74 RoadRunner GTX U code D21 4spd. and its got the small axle 8.25. Not the 8.75 or 9.25

Yes its a 440 NOW, but was a 400HP
 
lso, sry for my misreading of Rons post i misread 9.25 for 9.75. Hence me posting Dana60. My bad
 
I know, I was a little confused to as I never heard of a 74 440 4spd RR GTX esecially with an 8.25.

I was lucky that my 72 340 RR still had its 8.75 intact. Most E-Bodie with the exception of /6's had 8.75's.

Again, originally it was a 400 4spd small axle. I hace a 69 440 in it currently, hence my sig
 
Didn't mean to start a debate lol.. I don't know what ratio it is and i used the 9 1/4 instead of 9.25 so not to get any confused.. It is a 9 1/4 it is NOT the Dana.... 9 /75, Im just trying to find out what the guy did to this car, it came from Virgina, i cant get ahold of him, i read they did put the 9 1/4 in these, BUT only with a BB.. That tells me it should have the smaller one in it because its a SB... He did things to the engine that id like to know what, ive never had a 318 that was this strong, just trying to understand more on this, its my toy, i had all the "money" cars, hope to have another, not because of worth but because i like them, i had the 68-70 real RR, there cool cars but im having as much fun if not more with my car now. You guys talk all ya want about the GTX, i love to listen and learn... I can find a pic to show you mine but it is the 9 1/4 trust me... I am thinking he put it in, if they only came with BB cars, he would have had to put it in.. i know this didn't come with a BB, its supposed to be the original 318 but now i don't know, heads say there 1975, it has a roller cam, maybe the newer heads because of this? Now what i read they only had the 9 1/4 in a BB car, if there were exceptions, let me know, im going by what ive looked up and others have posted.. here is a diagram, read here what it says about the 9 1/4, maybe it will help someone explain to me something... Thanks, and please keep on with the GTX. love to read all this..
MOPAR20REAR20END20DIAGRAMS.gif
 
From what I've seen over the years, just about anything was possible and this is especially true when the union decided to go on strike. Ever see a 318 car with a convertible/hipo chassis? I know for a fact that this kind of stuff happened at Ford during the 1967 UAW strike. How a car is supposed to be built isn't 100% by the book gospel. Mistakes are common even during non strike conditions. Does your car have a build sheet? Check if it does and if it does, check to be sure the VIN on the sheet matches the car. I had a 70 440 Challenger ragtop with a build sheet from a /6 car....
 
While this chart is good for ID its alittle inaccurate.
The 8.75 was used through 74 in everything not 72, except A-body, 72 was last year for those.
I don't think they even had the 9.25 available for the 72 model year.
E's used the 8.75 through 74 and the 7.25 was the only other E rear made.
Danas were available with an auto in some years.
Also while the 8.75 was mainly used in 71/4B with HP motor have see a very few non-HP cars that came with the 8.75. Cars optioned with a tow or axle package got the 8.75 Other than that the 8.25 was used in most 71/4B's. Can't count how many of those I've tossed out.
9.25 was not used in trucks til 75
 
Also while the 8.75 was mainly used in 71/4B with HP motor have see a very few non-HP cars that came with the 8.75. Cars optioned with a tow or axle package got the 8.75 Other than that the 8.25 was used in most 71/4B's.

i parted a 71 sat 318 auto ac car and it had a 8.75 in it.
it was coded on the fender tag
for ac and also for the 11 inch hd brakes...
just a thought,
i wonder if the brake option also had something to do with the rear selection
besides engine size determing what rear was used????
 
i parted a 71 sat 318 auto ac car and it had a 8.75 in it.
it was coded on the fender tag
for ac and also for the 11 inch hd brakes...
just a thought,
i wonder if the brake option also had something to do with the rear selection
besides engine size determing what rear was used????

Did it have any A codes on it?
 
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