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72 -74 B body rear axle Question 81/4 vs 8 3/4 vs 9 1/4
#155513
11/23/08 08:45 PM
11/23/08 08:45 PM
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Joined: Jan 2003
Posts: 3,449
Gateway to the West.
hemi_harvester
OP
master
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OP
master
Joined: Jan 2003
Posts: 3,449
Gateway to the West.
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OK is there any reasoning to which cars got what? I know the lower performance cars usually received an 8 1/4 but I have seen 73 -74 400 / 440 cars with 8 3/4 and 9 1/4 Any logic to what got what or just what the plant had on hand? 
There comes a time in life, when you walk away from all the drama & people who create it. You surround yourself with people who make you laugh, forget the bad, and focus on the good.
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Re: 72 -74 B body rear axle Question 81/4 vs 8 3/4 vs 9 1/4
[Re: hemi_harvester]
#155514
11/23/08 10:15 PM
11/23/08 10:15 PM
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Joined: Jan 2003
Posts: 13,573
md
mopars4ever
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,573
md
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Re: 72 -74 B body rear axle Question 81/4 vs 8 3/4 vs 9 1/4
[Re: DoctorDiff]
#155520
11/24/08 01:17 PM
11/24/08 01:17 PM
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Joined: Aug 2007
Posts: 6,095
Valencia, España
NachoRT74
master
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master
Joined: Aug 2007
Posts: 6,095
Valencia, España
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I have one NOS down here, with suregrip conekind, but is just teh housing with carrier. no axles, cover, brake lines or anything
With a Charger born in Chrysler assembly plant in Valencia, Venezuela
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Re: 72 -74 B body rear axle Question 81/4 vs 8 3/4 vs 9 1/4
[Re: IMGTX]
#155524
11/24/08 09:10 PM
11/24/08 09:10 PM
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Joined: Jan 2003
Posts: 5,275
near Harrisburg, Pa
440trk
master
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master
Joined: Jan 2003
Posts: 5,275
near Harrisburg, Pa
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Quote:
The HP and some other big cars were supposed to get the 8-3/4 through the early part of 74. The later part of 74 they dropped the 8-3/4 for the 9-1/4.
The light duty B bodies were supposed to get the 8-1/4.
You sir, are CORRECT! 
The 8 3/4 went away in 74 (at some point) and the 9 1/4" replaced it. I have the 73/4 parts manual around here somewhere...If I can find the changeover date, I'll post it back. 
This is also true of Dodge trucks.
I am, however, curious as to what rear a late build 74 360 4spd Cuda/Challenger would have had....  I've never seen a 9 1/4" E-body rear. 
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Re: 72 -74 B body rear axle Question 81/4 vs 8 3/4 vs 9 1/4
[Re: DoctorDiff]
#155525
11/24/08 10:19 PM
11/24/08 10:19 PM
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Joined: Aug 2007
Posts: 6,095
Valencia, España
NachoRT74
master
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master
Joined: Aug 2007
Posts: 6,095
Valencia, España
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Quote:
How did you come up with all that NOS drivetrain stuff?
I have an NOS C-body 9.25" (Dana 53) housing.
Chrysler had assembly plants and dealers here  , and some of them still have Old Stock.
actually they are still here, after a break for 13 years Chrysler left Venezuela ( 79-92 )
I got this housing with SG carrier thinking on upgrade my 8 3/4 because perches width is the same, just drum to drum width is a little bit shorter, about 1/2", but never found the axles or cover. Berings needs to be replaced since got some water on storaging and they are rusted.
as far I rememeber, gear ratio is 2.91 or so
With a Charger born in Chrysler assembly plant in Valencia, Venezuela
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Re: 72 -74 B body rear axle Question 81/4 vs 8 3/4 vs 9 1/4
[Re: NachoRT74]
#155527
11/24/08 11:17 PM
11/24/08 11:17 PM
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Joined: Nov 2003
Posts: 12,494
Western Colorado High Desert
moparmarks
I Live Here
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I Live Here
Joined: Nov 2003
Posts: 12,494
Western Colorado High Desert
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I've heard of some 74 B's with a 9.25 but just have never seen one myself. Had a couple 74 HP Chargers and both had 8.75 but may have been early cars. Have had a few 74 trucks all with 8.75 rears. Maybe they just used the 8.75 for the E's through out 74. All 71/4B's 2-bbl cars both BB and SB and 6 cyl that I've owned had 8.25
72 Satellite Sebring Plus 440, 72 Dart 5.9 4-spd, 68 Valiant, 73 W200, 78 D100 sb, 78 D200, 98 DAKOTA, . Moparmarks Parts & Restorations Desert Mopar Metal Grand Jct. CO 970-261-7039 http://moparmark.com/motormangj@gmail.com
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Re: 72 -74 B body rear axle Question 81/4 vs 8 3/4 vs 9 1/4
[Re: moparmarks]
#155528
11/24/08 11:56 PM
11/24/08 11:56 PM
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Joined: Oct 2007
Posts: 2,886
US of A
A38s!
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master
Joined: Oct 2007
Posts: 2,886
US of A
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I've a 73 Sat 400 Wagon with trailer pkge and 9.75 open.
I assume RK, WK, some wags, and tow packs would all be likely prospects.
(I like the edit function)
Last edited by Chief-Kikerdown; 11/24/08 11:59 PM.
WANTED: Your 71-78 Late B-body sedan parts! Police or Civilian.
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Re: 72 -74 B body rear axle Question 81/4 vs 8 3/4 vs 9 1/4
[Re: moparmarks]
#155529
11/25/08 12:28 AM
11/25/08 12:28 AM
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Joined: Jul 2008
Posts: 403
NE Ohio
71 FJ6 Charger
mopar
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mopar
Joined: Jul 2008
Posts: 403
NE Ohio
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I used to have 2 survivor cars,a 73 Charger SE 400 2bbl auto with 3.23 8 3/4,and a 73 Rallye 400 HP auto with 3.55 8 3/4.
'71 383HP FJ6 Charger SE
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Re: 72 -74 B body rear axle Question 81/4 vs 8 3/4 vs 9 1/4
[Re: DaytonaTurbo]
#155531
11/25/08 01:50 AM
11/25/08 01:50 AM
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Joined: Jan 2003
Posts: 616
Sacramento, CA
Kirk_Ingram
super street
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super street
Joined: Jan 2003
Posts: 616
Sacramento, CA
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I have a 9.25" in a 71 RR, came with the car when I got. I know its not factory...I THINK it came from a 75 Monaco dunno for certain. The fit is perfect though. I pulled a rear sway bar out of a 75 B-car many years back, with ISO leaf plates, 9.25 rear also. I didn't know the 9.25" was referred to as a Dana 53, however, I DID know the carrier's were Spicer units (hard miss the DIAMOND stamp). Thanks Dr. Diff for that little tid-bit.
Death or Glory...it's just another story.
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Re: 72 -74 B body rear axle Question 81/4 vs 8 3/4 vs 9 1/4
[Re: DaytonaTurbo]
#155532
11/25/08 01:54 AM
11/25/08 01:54 AM
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Joined: Jan 2003
Posts: 5,275
near Harrisburg, Pa
440trk
master
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master
Joined: Jan 2003
Posts: 5,275
near Harrisburg, Pa
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Quote:
I've got a 9.25 w/3.55's in mine, no idea if it's stock or not though. Anybody know why they switched from the dana to the 9.25? Cheaper I assume?
There's a chance yours is a legit 74 B-body 9 1/4. As far as I know, they were available with either 3.21 or 3.55 Sure-grip rears. I don't think the 74's B-body 9-1/4" were produced with an open diff. :shruggy? They are not overly common...in ALL the 71-4 B-bodies I've seen in the last 21 years of messing with specifically these cars....I've seen 2 9-1/4" rear cars.
The Dana 60 was no longer used in passenger cars after 1972.
I'm guessing the 9-1/4" rear is cheaper to produce than the 8-3/4", hence it's eventual replacement.
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