Rearaxle on a 318 car

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    Author Topic: Rearaxle on a 318 car  (Read 5149 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:
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    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...
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    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:

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    Offline 360 'CUDA

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    Re: Rearaxle on a 318 car
    « Reply #5 on: January 18, 2007 - 09:09:26 AM »
    Quote from: GoodysGotACUDA 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:

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

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    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.
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    Offline GoodysGotaCuda

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    Re: Rearaxle on a 318 car
    « Reply #7 on: January 18, 2007 - 11:03:34 AM »
    Quote from: 360cuda on January 18, 2007 - 09:09:26 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 »
    Quote from: GoodysGotACUDA on January 18, 2007 - 11:03:34 AM


    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).
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    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.
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    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...

    Quote from: dougdel 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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