8.25 3.55 sure grip for sale

Transmissions and Rear Ends

  1. jasperjacko

    jasperjacko Well-Known Member

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    Selling the rearend out of Modoba. Gears look good, sure-grip works great, axles splines showing some wear. I'm upgrading to a 8.75 with disc brakes. Brakes are in very good condition, they have about 21,000 miles on them. 250 for the housing 300 complete with brakes. I'm in Akron, Ohio. I think the drums are stock 10" size. but will have to check.
     
    Last edited: Jun 26, 2018
  2. 7T8 Custom

    7T8 Custom Well-Known Member

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    10 or 11 inch drums and where are you located? Might make a big difference to someone for shipping.
     
  3. jasperjacko

    jasperjacko Well-Known Member

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    Wow, nobody looking for a sure-grip?
     
  4. Oldiron440

    Oldiron440 Well-Known Member

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    I had to give my last 8.25 away, worthless in my neighborhood.
     
  5. Oldiron440

    Oldiron440 Well-Known Member

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    I think the guy I gave the LS to scrapped it because it was the wrong spine for his needs.
     
  6. Joe12459

    Joe12459 Well-Known Member

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    Too far away, or I'd be interested. It would be nice to have a spare for Joe Jr's car.
     
  7. XfbodyX

    XfbodyX Well-Known Member

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    Can you post a pic of how the axles look and possibly the ring gear/carrier?
     
  8. jasperjacko

    jasperjacko Well-Known Member

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    You want me to take it back apart? When I get some time.
     
  9. XfbodyX

    XfbodyX Well-Known Member

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    Even if it were a local sale, most would want to pull an axle and the rear cover since everyones expectations vary. Sorry. Then your probably not interested in shipping it which I understand I wont ship much myself.
     
  10. BudW

    BudW Moderator Staff Member

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    In 1996 (or ’97) Chrysler had axle spline change. I think it is 27 spline vs. 29 spline – but don’t quote me on the spline count number. For non-limited slip differentials – it wasn’t a problem for a person can get the correct spline spider gears (side gears) and you are good if something needed replaced – but that is not something you can do with limited slip differentials.

    I have gotten to the point that I won’t rebuild a rear differential for a friend or myself, without installing a limited slip at same time – for “open” differentials just don’t cut it anymore.

    The ring and pinion gear set (without the carrier – or part the ring gear bolts too) is the same on rear 8¼” differentials from ’68 to present (if they are still using them). They are different on front differentials (used on 4*4 pickups and Dakotas).

    Chrysler also has 8¾”, 9¼” and 9¾” (Dana 60) front differentials – which all are a reverse of the rear differentials – so if looking at used parts, always look at the gear tooth direction before buying.

    I have a spare 8¼” – but even with that, I’m on the lookout for a pair of 8¾” housings.

    Note: stored differentials are like stored manual transmissions – a person needs to rotate the gears every so often to keep everything lubricated – otherwise rust will appear on gears and/or on bearings, neither is not a good thing.
    BudW
     
  11. Mn mopar

    Mn mopar Well-Known Member

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    What style carrier is it?
     
  12. jasperjacko

    jasperjacko Well-Known Member

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    not sure what you mean
     
  13. jasperjacko

    jasperjacko Well-Known Member

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    Car is in storage until April, won't be available until after then.
     
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  14. BudW

    BudW Moderator Staff Member

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    The original poster said:
    There is no mention of if his original differential is 7¼” or 8¼” – but everyone is assuming it is an 8¼”.

    Not very many limited slips were made for any 7¼” either from Chrysler or aftermarket – so again, I would assume it to be an 8¼” because it has a limited slip (he does mention sure-grip).


    On a different note, almost all FMJ’s came with 10” rear brakes.
    Only Police, Taxi and “some” towing package cars (not very many) came with 11” drum brakes. I would say (but no numbers to back this up) that only about 1% of all FMJ vehicles came with 11” drums, and that number may be on the high side - Maybe closer to ½ of 1%.

    11” drum brakes will fit on either differential (and even the 8¾” that Original Poster is planning on using - but he said disk's) – but it looks really out of balance when you look at a 7¼” with 11”s (big brakes . . . tiny differential).
    The factory did not make any 7¼” with 11” brakes for, I think, the factory was thinking if you need the bigger brakes, you also need the bigger gears (I shrug).

    The only thing not answered, is if his differential is a 7¼” or a 8¼” – and it sounds like we won’t find out until spring.
    BudW
     
  15. Oldiron440

    Oldiron440 Well-Known Member

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    Bud the title of the thread is 8.25 3.55 sure grip for sale. I'm pretty sure that it is a 8 1/4.
     
  16. BudW

    BudW Moderator Staff Member

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    Sigh, another "hand meets forehead" moment . . .
     
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  17. jasperjacko

    jasperjacko Well-Known Member

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    Just an fyi, there rear still looks good, not a rusty hulk. I stripped it to bare metal and painted it when I put it in the car.
     
  18. jasperjacko

    jasperjacko Well-Known Member

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    And yes, it is an 8.25 as mentioned in the title. lol.
     
  19. jasperjacko

    jasperjacko Well-Known Member

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    I still have the original rear with the 2.21 gears and those axles are perfect, only have 68,000 miles on them with the original 135 hp 318. Whoever buys it can have both. Both rearends, not the engine, it's long gone.
     
  20. XfbodyX

    XfbodyX Well-Known Member

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    I will take it if you will ship it or give me some time to find a mopar person to grab it and ship it.
     
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