Rearaxle on a 318 car

Author Topic: Rearaxle on a 318 car  (Read 5148 times)

Offline ESGEE

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Rearaxle on a 318 car
« on: January 18, 2007 - 06:31:16 AM »
I wonder what is the standard rearaxle on 1970 318 car?  :clueless:
70 Challenger RT/SE(Looking for 383 Magnum N0B196875)
70 Challenger RT/SE(Looking for 383 Magnum N0B115166)
70 Challenger SE(RT/SE clone)
69 Charger RT/SE 4speed Trackpac
70 Charger 500




Offline Pistol Gripper

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Re: Rearaxle on a 318 car
« Reply #1 on: January 18, 2007 - 07:24:18 AM »
Here's what I found for 1970 on a Mopar tech site:

Differential Options:
• Low Performance models came standard with a 7.25 inch housing with either 2.76:1 or 3.23:1 ratio gearing. 
• High Performance models came standard with a 8.75 inch housing with 2.76:1, 3.23 :1, 3.55:1, and 3.91:1 ratios, and an option of "SureGrip" limited slip. The 3.23 and 3.55 were the most common, with the 3.55:1 being standard in the T/A with an optional 3.91:1. 
• Hemi models with a manual transmission came with a 9.75 inch Dana 60 "SureGrip" axle standard offering either 3.54:1 or 4.10:1 gearing, and in 440 and Hemi automatic models, this rear differential was optional, in place of the 8.75 housing. 

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Offline GoodysGotaCuda

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Re: Rearaxle on a 318 car
« Reply #2 on: January 18, 2007 - 07:46:35 AM »
The 2 72 318 cars we have, both have original 8 3/4" open 2.76 rears...both are 'low performance' 2bbl 318s.  :2cents:
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Offline ESGEE

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Re: Rearaxle on a 318 car
« Reply #3 on: January 18, 2007 - 08:04:13 AM »
I thought it was 8 3/4 open 3.23 on my SE, i dont know how to check it, i know the car is untouthed...
70 Challenger RT/SE(Looking for 383 Magnum N0B196875)
70 Challenger RT/SE(Looking for 383 Magnum N0B115166)
70 Challenger SE(RT/SE clone)
69 Charger RT/SE 4speed Trackpac
70 Charger 500

Offline Super Blue 72

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Re: Rearaxle on a 318 car
« Reply #4 on: January 18, 2007 - 08:12:35 AM »
Is this your car we're talking about?  Do you have a pic of the rear axle?

Look at thi pic:

1972 Dodge Challenger Rallye 340, AT, Code TB3=Super Blue, SBD=8/17/1971.  Yes, a Rallye without the fender louvers from the factory because of the body side molding option.

Pic #2 and 3 of my ARII 1/24 scale model car 

Phil in New England-Massachusetts  Always thank God for what you have!

http://www.cardomain.com/ride/456046/1972-dodge-challenger

Offline 360 'CUDA

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Re: Rearaxle on a 318 car
« Reply #5 on: January 18, 2007 - 09:09:26 AM »
The 2 72 318 cars we have, both have original 8 3/4" open 2.76 rears...both are 'low performance' 2bbl 318s.  :2cents:

Later model Barracudas and Challengers  all have the 8 3/4 rearends standard.
(they all have the good disc brakes too)


Offline moper

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Re: Rearaxle on a 318 car
« Reply #6 on: January 18, 2007 - 10:41:39 AM »
I have seen a few cars with 318s and 7 1/4s in E bodies. But that was not "standard " I dont believe. The 8 3/4 case was. Ratio depended on egnien, trans and "packages" ordered. So really, anything could have gotten in there...lol.

Offline GoodysGotaCuda

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Re: Rearaxle on a 318 car
« Reply #7 on: January 18, 2007 - 11:03:34 AM »
Later model Barracudas and Challengers  all have the 8 3/4 rearends standard.
(they all have the good disc brakes too)



The challenger was manual drum on all fours.  :icon16: now..well 13" baers.  :grinyes:

i agree with moper, almost seems like the cars got whatever was around and there wasnt much standard from what ive seen either..
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Offline TreeFrog

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Re: Rearaxle on a 318 car
« Reply #8 on: January 18, 2007 - 11:12:29 AM »
Think my 73 has the 8-3/4...looks like it, though from conversations at time of purchase I had always wondered if he has put a ford rear-end in the car.

He commented on having put a Detroit Locker and something about having gotten it out of a ford...problem was I could not quit nodding my head and looking at the car... I payed less attention than I should have at the time...pluss I was 20...oooo pretty car...
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Offline Super Blue 72

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Re: Rearaxle on a 318 car
« Reply #9 on: January 18, 2007 - 12:17:50 PM »


i agree with moper, almost seems like the cars got whatever was around and there wasnt much standard from what ive seen either..

 :iagree:  What is standard for these cars?  You often don't see standard stuff. 

How many times have you seen a 3 speed manual tranny in a '70 Challenger?  There are some but not many and that tranny was "standard" if you got the 225, 318, 340, and 383 engines (4 barrel).
1972 Dodge Challenger Rallye 340, AT, Code TB3=Super Blue, SBD=8/17/1971.  Yes, a Rallye without the fender louvers from the factory because of the body side molding option.

Pic #2 and 3 of my ARII 1/24 scale model car 

Phil in New England-Massachusetts  Always thank God for what you have!

http://www.cardomain.com/ride/456046/1972-dodge-challenger

Offline 72hemi

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Re: Rearaxle on a 318 car
« Reply #10 on: January 18, 2007 - 09:20:04 PM »
My 70 barracuda 318 car (Currently all original) has a 7 1/4 rear end. I know 72 and up all got 8 3/4 rears, not sure about 71, but in 1970 I know that the 7 1/4 was standard on the low performance cars. I have seen several unrestored 318 1970 cars all had 7 1/4 rear ends.
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Offline duodec

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Re: Rearaxle on a 318 car
« Reply #11 on: January 18, 2007 - 10:54:54 PM »
My '71 Challenger 318-2V came with an 8-3/4" 741 (small pinion) 2.76 gearset.  4 wheel drums (10") also.

Offline Jacksboys

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Re: Rearaxle on a 318 car
« Reply #12 on: January 19, 2007 - 12:45:54 AM »
My '71 came with the 7-1/4 (3.23) and it had the 318-2, 904, 4 wheel drums.
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Offline dougs bs23

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Re: Rearaxle on a 318 car
« Reply #13 on: January 19, 2007 - 12:00:54 PM »
our 74 has the 8-3/4 with 2.76 i guess it will hold up good to the 340 we have to put in it :dunno:
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Offline TreeFrog

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Re: Rearaxle on a 318 car
« Reply #14 on: January 19, 2007 - 12:11:20 PM »
I would think it should do just fine...

our 74 has the 8-3/4 with 2.76 i guess it will hold up good to the 340 we have to put in it :dunno:
65 Satellite     361 Ruby Red Poly
72 Challenger    360 Top Banana     
73 Challenger    340 Triple Black
87 Dodge Ram     318 Blue
88 Dodge Ram     360 Grey (+)
04 Jeep Grand Cherokee Limited 4.7L Pewter Met.