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Gear Ratios in dodge 60s

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Danswift79, Oct 26, 2001.

  1. Danswift79

    Danswift79 Registered Member

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    Hey guys' I got a question for ya, What gear ratios come in d60s in the front of One ton dodges. I found one and now my rear diff is giving me probs so I'm thinkin time for a swap. Only prob is I need to know what kind of gear ratios are available. Are they the same as GMs and also, would it be possible to match a ratio from a 14-bolt to the dodge.? Thanx for any info. I know about the spring plate distances being different.

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  2. DesertDueler

    DesertDueler 1/2 ton status

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    Most probably came with 4.10s. The dodge dana 60s and GM dana 60s used the same gears. I would say put at least 4.56s in it.

    86Jimmy 4"&35"MTRs,87 burb 4"&35"MT,69Firebird w/525 hp,and 70GTO live in PHX,AZ<a target="_blank" href=http://www.geocities.com/modifierperformance>My vehicles</a>
     
  3. Ruthiford

    Ruthiford Registered Member

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    you have to be care full on 89-93 you could have gotten 3.07-3.54-or 4.10 the one you have to be care full of is the 3.07 causeit could be a dana61 (which means no gear change ops) just be aware on dana 60's most had a 60 casted into one of the case webs 61's had no marking of 61 at all
     
  4. pcorssmit

    pcorssmit 1/2 ton status

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    The 3.07s would have come in trucks with the Cummins and the 3 spd 727 auto trans. All the ones I know of are the early ones, like '89-90s.

    Pete

    '83 K5, 350 TBI (ex 6.2), 700R4, NP208, Dana 60/14 bolt, 4.56s, Detroits, 3" lift, 15-39.5x15 TSLs
    '97 Dodge 2500 4x4 CC LB Sport, Cummins 5 spd
     
  5. u2slow

    u2slow 1/2 ton status

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    I could be wrong, but I think 3.07's would only be in 2wd trucks - making 3.07's in a front D60 a moot point.
     
  6. pcorssmit

    pcorssmit 1/2 ton status

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    No, they were available in the early Cummins 4x4 trucks. The motors were governed at 2500 (or less), and with no overdrive in the 3 spd autos they had to put 3.07s in them to get any kind of road speed out of them.

    Pete

    '83 K5, 350 TBI (ex 6.2), 700R4, NP208, Dana 60/14 bolt, 4.56s, Detroits, 3" lift, 15-39.5x15 TSLs
    '97 Dodge 2500 4x4 CC LB Sport, Cummins 5 spd
     
  7. Danswift79

    Danswift79 Registered Member

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    Thanx for the warnings guys, I guess I am going to just have to get a container to hold the gear lube and check the gear ratio. Any way to tell between a 60 and a 61?

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