69-70 8.25 need help/info please

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cruiser3042

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i bought a 8.25 rear end out of a 73 satellite. When i got it home the casting number is 69-70 (2852905)
10925 in smaller numbers under it a circle A to the rt
under that is a 231 then a number 2 cheysler symbol with a 6
under that as a 2 looks like a 2 bladed propeller and a S

does anyone know what it is ?
 
cruiser3042 said:
i bought a 8.25 rear end out of a 73 satellite. When i got it home the casting number is 69-70 (2852905)
10925 in smaller numbers under it a circle A to the rt
under that is a 231 then a number 2 cheysler symbol with a 6
under that as a 2 looks like a 2 bladed propeller and a S

does anyone know what it is ?
Click to expand...

Check out this chart,
 

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Thanks Bill
Your info is always spot on. I checked my 8 1/4
57 1/4 flange to flange
47 1/4 center perch to center perch
Sure grip
gear ratio 2.76

Im happy
its a 69-70 model
my guess is it started life as a A body rear and they moved the perches for the b body
I didnt see any extra weld marks
but that is the only way i can explain the demensions and year since my research shows 8 1/4 was introduced to the A body in 69
 
Although i found the pertanant info i could not find out what the other markings are
 

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cruiser3042 said:
Thanks Bill
Your info is always spot on. I checked my 8 1/4
57 1/4 flange to flange
47 1/4 center perch to center perch
Sure grip
gear ratio 2.76

Im happy
its a 69-70 model
my guess is it started life as a A body rear and they moved the perches for the b body
I didnt see any extra weld marks
but that is the only way i can explain the demensions and year since my research shows 8 1/4 was introduced to the A body in 69
Click to expand...

Looks like you scored a winner! That is definitely an 8.25":1, and the Sure Grip is a bonus!!!

Dunno anything about all those other markings (numbers) but perhaps somebody with knowledge of that stuff will chime in here.... They're out there... if thsy see this.

You dun gud!!!:cheers:
 
The 8 1/4 was introduced in 69 B-Bodies. Not until 73 for A-Bodies. I had a 71 or 72 Chrysler Newport with a 8 1/4 in it.
 
If those spring perches are original that rear is a 1973 or newer B,C,or F body. They have the large spring centering holes for the rubber isolated springs which they started using in 73. The A Body 8 1/4 never used the rubber isolated springs. Anyone correct me if I'm wrong.
 
You are correct they never used rubber isolated springs on 73-6 A Bodies. I've parted plenty out & they never had it.
 
lemondana said:
The 8 1/4 was introduced in 69 B-Bodies. Not until 73 for A-Bodies. I had a 71 or 72 Chrysler Newport with a 8 1/4 in it.
Click to expand...
I hear ya,it came out of a 73 318 4 door satellite. The car seemed original. But the casting number is from 69-70.
What do you think ?
Also i cleaned it up a lil while ago and saw no sign of the perches re welded ??
I am positive its a 8.25/2.76ratio,posi and a lil over 57 inches with 47 inch perches.
Sighs
 
this is a 73 and up B Body rear axle. even my 77 charger axle is the same exact width dimensions with same perches with the giant hole for the rubber isolators that are 47 1/4 apart. there was no A body 8 1/4 until 73.
 
lemondana said:
If those spring perches are original that rear is a 1973 or newer B,C,or F body. They have the large spring centering holes for the rubber isolated springs which they started using in 73. The A Body 8 1/4 never used the rubber isolated springs. Anyone correct me if I'm wrong.
Click to expand...

exactly correct.
 
cruiser3042 said:
Ok its a a body
explain why the casting number is 69-70 ?
Click to expand...

dude, its a B Body 8 1/4 . this same axle was used in all B Bodies all the way up to 1979 and probably trucks to who knows when. the casting numbers were not changed every year , in most cases, (no pun intended) , if not all ,only when the design of the axle was changed. the only thing that changed from 72 to 73 was the hole in the perches to accept the rubber isolators. beginning in 75 there were 2 different cases, one for the lower gears (2.43-2.71) and a larger case for 2.91 and up. an axle can have the same casting number but different date code. the A body 8 1/4 was put into service in 73 and replaced the SBP 8 3/4, a much narrower rear end than the B body ,and the perches were 4 inches closer together.
this info is coming from everything ive read. i had to do my homework when i put the 3.55 sure grip in my 77 8 1/4. im sure others can elaborate more on the A body 8 1/4
 
73AbodEE said:
dude, its a B Body 8 1/4 . this same axle was used in all B Bodies all the way up to 1979 and probably trucks to who knows when. the casting numbers were not changed every year. in some cases (no pun intended) they were changed when the design of the axle was changed, the only thing that changed from 72 to 73 was the hole in the perches to accept the rubber isolators. beginning in 75 there were 2 different cases, one for the lower gears (2.43-2.71) and a larger case for 2.91 and up. an axle can have the same casting number but different date code. the A body 8 1/4 was put into service in 73 and replaced the SBP 8 3/4. much narrower rear end and the perches were 4 inches closer together.
this info is coming from everything ive read. i had to do my homework when i put the 3.55 sure grip in my 77 8 1/4.
Click to expand...

Seems the light is on but no one is at home. :banghead::banghead:
 
Oklacarcollecto said:
Seems the light is on but no one is at home. :banghead::banghead:
Click to expand...

im not really sure what the big deal is here anyway. its not going to fit without being re-worked. i would try to sell it and find an A body 8 1/4 or 8 3/4. all factory 8 3/4 A body rears are SBP, and all 8 1/4s are BBP.
 
are you trying to say im stupid??
First off i didnt know the kept the casting numbers.Second ,i am a jet mechanic with a degree.
I might be ignorant about mopars to a point but i am definatly not dumb.
OKla, i dont need the rude comments.
73 ,thank you very much for the great info.It is no big deal i just wanted to know about the rear end is all.
this will end this thread
 
cruiser3042 said:
are you trying to say im stupid??
First off i didnt know the kept the casting numbers.Second ,i am a jet mechanic with a degree.
I might be ignorant about mopars to a point but i am definatly not dumb.
OKla, i dont need the rude comments.
73 ,thank you very much for the great info.It is no big deal i just wanted to know about the rear end is all.
this will end this thread
Click to expand...

73AbodEE said:
this is a 73 and up B Body rear axle. even my 77 charger axle is the same exact width dimensions with same perches with the giant hole for the rubber isolators that are 47 1/4 apart. there was no A body 8 1/4 until 73.
Click to expand...

cruiser3042 said:
Ok its a a body
explain why the casting number is 69-70 ?
Click to expand...

The comment was made to get your attention because you weren't listening to what you were being told. You appear to be listening now so it worked.
 
Well last time i checked i am grown,
I dont need anyone to get my attention implying im dumb.
You missed my point

I kept asking because the casting numbers are a different year.
Additionally ,Noone said that prior to your rude comment.
Now the 73 gave me the info i need to understand that they did not change the casting numbers.

This is childish,i come here to learn as much as i can.
Im just not goin to talk to you anymore.
 
cruiser3042 said:
are you trying to say im stupid??

73 ,thank you very much for the great info.It is no big deal i just wanted to know about the rear end is all.
this will end this thread
Click to expand...

he was just saying that you are logged in but werent responding to any of my replies. nobody said you are stupid. there is a huge difference in width from A to B body 8 1/4 rears.
 
cruiser3042 said:
i bought a 8.25 rear end out of a 73 satellite. When i got it home the casting number is 69-70 (2852905)
10925 in smaller numbers under it a circle A to the rt
under that is a 231 then a number 2 cheysler symbol with a 6
under that as a 2 looks like a 2 bladed propeller and a S

does anyone know what it is ?
Click to expand...

cruiser3042 said:
Thanks Bill
Your info is always spot on. I checked my 8 1/4
57 1/4 flange to flange
47 1/4 center perch to center perch
Sure grip
gear ratio 2.76

Im happy
its a 69-70 model
my guess is it started life as a A body rear and they moved the perches for the b body
I didnt see any extra weld marks
but that is the only way i can explain the demensions and year since my research shows 8 1/4 was introduced to the A body in 69
Click to expand...

cruiser3042 said:
I hear ya,it came out of a 73 318 4 door satellite. The car seemed original. But the casting number is from 69-70.
What do you think ?
Also i cleaned it up a lil while ago and saw no sign of the perches re welded ??
I am positive its a 8.25/2.76ratio,posi and a lil over 57 inches with 47 inch perches.
Sighs
Click to expand...

cruiser3042 said:
Ok its a a body
explain why the casting number is 69-70 ?
Click to expand...

cruiser3042 said:
are you trying to say im stupid??
First off i didnt know the kept the casting numbers.Second ,i am a jet mechanic with a degree.
I might be ignorant about mopars to a point but i am definatly not dumb.
OKla, i dont need the rude comments.
73 ,thank you very much for the great info.It is no big deal i just wanted to know about the rear end is all.
this will end this thread
Click to expand...

cruiser3042 said:
Well last time i checked i am grown,
I dont need anyone to get my attention implying im dumb.
You missed my point

I kept asking because the casting numbers are a different year.
Additionally ,Noone said that prior to your rude comment.
Now the 73 gave me the info i need to understand that they did not change the casting numbers.

This is childish,i come here to learn as much as i can.
Im just not goin to talk to you anymore.
Click to expand...

Read the entire thread. Read your own posts. You weren't paying attention to what you were being told and went right on with your train of thought. As far as you not talking to me anymore that is probally a good deal because you don't listen and aren't worth wasting time on.
 
Its ok i already reported your profile
take your adolescent attitude elsewhere.
It is i that is a adult here not you.
 
cruiser3042 said:
Its ok i already reported your profile
take your adolescent attitude elsewhere.
It is i that is a adult here not you.
Click to expand...

I expected nothing less and that is why I quoted and locked everyone of your posts so you couldn't change them. I have done nothing wrong but try to get you to pay attention. I won't be posting to this thread again because aren't worth wasting time on.
 
It looks like the OP got the info he needed on the 8 1/4.

Now let's quit bickering and play nice :-k
 
Yes i did
73 was a big help . Now i understand at least that was the original rear from the donor car most likely. Its nice to know .
 
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