Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

70 gmc jimmy front differential?

Discussion in 'The Garage' started by needed help, Dec 23, 2004.

  1. needed help

    needed help Newbie

    Joined:
    Dec 23, 2004
    Posts:
    2
    Likes Received:
    0
    Location:
    missouri
    Could someone please help me I have purchased a 70 gmc jimmy 4x4 for my son. I need to replace the rear end "someone has put a 5 hole rear end on it". Since I need to do this, I thought I would swap out the front so I could put a later model with disk brakes. Could you tell me what years would be a direct bolt on.
     
  2. Hossbaby50

    Hossbaby50 3/4 ton status

    Joined:
    Sep 1, 2001
    Posts:
    8,972
    Likes Received:
    0
    Location:
    Peoria, AZ
    Anything up till '91.

    Harley
     
  3. MTBLAZER89

    MTBLAZER89 3/4 ton status Premium Member GMOTM Winner

    Joined:
    Aug 14, 2001
    Posts:
    7,272
    Likes Received:
    236
    Location:
    Oak Harbor, WA
    All GM fronts are a direct swap as far as spring perch width. Brake lines may vary between a 10 bolt and a Dana 44 (what it has now). The rear was originally a 12 bolt, but a 10 12 or 14 bolt will all fit with adjustment of the spring perches. I believe 69-72 perches are narrower by a couple inches. Hope this helps.
     
  4. needed help

    needed help Newbie

    Joined:
    Dec 23, 2004
    Posts:
    2
    Likes Received:
    0
    Location:
    missouri
    Thank you....!
     
  5. diesel4me

    diesel4me 1 ton status Premium Member

    Joined:
    Jul 24, 2003
    Posts:
    17,540
    Likes Received:
    930
    Location:
    Massachussetts
    Just swap the axle shafts??

    If the rear end is the correct ratio to match the front,and the only problem is you have a 5 lug rear,and a 6 lug front,you can swap 6 lug axles into a 5 lug 2wd axle ,they interchange,just find some 6 lug axle shafts at the junkyard....:crazy:
     
  6. atho

    atho 1/2 ton status

    Joined:
    May 14, 2003
    Posts:
    1,115
    Likes Received:
    0
    Location:
    Wayne County, Ohio
    unless you are doing a total 100% resto, ditch the front axle. '70 was the only year GM used open knuckled front d44's with drum brakes, and the drums are specific to this year, and are hard to find. it would be less of a headache to just convert to discs, but that is my opinion.
     

Share This Page