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14 bolt ff or Dana 60?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by chaka454, Apr 11, 2002.

  1. chaka454

    chaka454 1/2 ton status

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    I have a 14 bolt sf in my truck that I just swaped two weekends ago, but now I want to go to a better differential I came accross a 14 ff, and a @odge Dana 60 wich one would you guys recommend I go with, I know the detroit locker for the Dana 60 is about $200 more than for the 14 ff how about as far as u-joints are they easy to find for the Dana 60, I have a 203 transfer case did they make a hybrid u-joint like the ones for the 14 bolt, what would you guys do? I know the Dana 60 has 410's I dont know about the 14 ff, and I have 410's in the front so the Dana 60 would match right up, and I asked the guys if he has an open carrier and he said yes, now for prices the 14 ff is about 140, and the other guy is asking $200 for the Dana 60 but he said he would negotiate, so probably about 150 or so, iluminate me guys.
     
  2. m j

    m j 1/2 ton status

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    both are good axles
    the 14ff wins in strength, bigger axleshafts, bigger ring n pinion gears.
    and ease of gear setup, doesnt require a case spreader, uses threaded carrier adjusters
     
  3. chaka454

    chaka454 1/2 ton status

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    Does anybody know the standar gears that came on a 14 ff, I think this truck has the original set up, what kind of gear might be in there, I have not opened the carrier to check.
     
  4. DesertDueler

    DesertDueler 1/2 ton status

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    If you plan on going with really low gears, then the dana 60 would be better. The 14 FF is limited to 5.13s. You can also get full spools for dana 60s for under 200 bucks.
     
  5. chaka454

    chaka454 1/2 ton status

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    No I plan to run at the most 38s, I dont really do alot of climbing or really tough offroading just your normal mudding once in a while but I want to have something tough under there so it wont brake.
     
  6. Silver84k5

    Silver84k5 1/2 ton status

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    I know you get more clearance underneath the diff with a d60 but i dont know how much, and if you ever wanted to you could get an ARB for the d60 also, 14 bolts are monsters though, i love em heh.
     
  7. wayne

    wayne 3/4 ton status

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    Most 14ff that I have seen have 4:10's. They also had 3:54, 3:73, and 4:56's from the factory. There is a good chance it will have 4:10's but check to be sure.
    The D60 is a good axle, it also has better ground clearance then a 14ff.
    The 14ff is one tuff axle, also you can install a Detroit in it yourself without having to much trouble. Another thing is the 14ff was used for a long time and parts are fairly easy to find.
     
  8. BowtieBlazer

    BowtieBlazer 1/2 ton status

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    Any idea how much more clearence with a d60 than a 14ff?? One of my main reasons for not switching to a 14ff is how much clearance I will lose. I just feel like that 14 bolt is just something to drag and lose much ground clearance with anything smaller than 38's. Also what bolt pattern is the d60 6 or 8?
     
  9. Silver84k5

    Silver84k5 1/2 ton status

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    My buddy had 35's and a 14 ff, we were going down a trail with some nice ruts and he got hung up and need pulled out, i went down the trail with my blazer with 38"s and a 12 bolt and i got a lot farther, (till i got buried into my doors in Soupy mud), but on that same trail my buddy with 38"s and a d60 didnt make it all that much further than my other buddy with the 14ff and 35"s so i really dont know seems like they both are going to drag relitivily tha same amount, i dont have any rtucks to measure on but i could take some measurements and make a educated guess, ill check it out.....
     
  10. chaka454

    chaka454 1/2 ton status

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    Well one more thing you can shave the 14 ff but I dont know how much clearance you would get though, I think I'm going with the 14 everything seems alot more cheaper than for the Dana 60.
     
  11. GMCLegacy

    GMCLegacy 1/2 ton status

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    go with the 14 bolt, like previously said, a detroit is $320, you can install it in your driveway in less than 2 hours without needing anything but a torque wrench. parts are cheap, 14 bolts are a dime a dozen up here. brakes are relatively cheap too. the 14 bolt will have the correct spring perches to fit in your rig, no need to contaminat your chevy with mopar, right?!?! thats my $.02
     
  12. BowtieBlazer

    BowtieBlazer 1/2 ton status

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    I was just thinking there must have been a good reason that The "White Knight" was running a D60 for quite some time. I am like you though I like staying chevy the 14bolt's size just really bothers me. Maybe I will just have to stick with a 12 bolt and have c-clips for life. /forums/images/icons/smile.gif
     
  13. tacoma972

    tacoma972 1/2 ton status

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    you can get a good inch of clearance out of shaving the 14bolt. my .02
     
  14. BozoWise

    BozoWise 1/2 ton status

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    How do you check the gear ratio on a 14 bolt? Do i have to open them up and count teeth? I am going to the yard this weekend and do not want to have to open up "ALL" the 14bolts to find a 4.10 or lower gear ratio.
     
  15. 79Beast

    79Beast 1/2 ton status

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    I would recommend the D60. You will not need the additional strength of the 14Bolt. You can buy a 1350 series yoke from Jegs for $50, so forget the bastard joints. The D60 will give you more ground clearance and weighs less. Yes, the Detroit is less for the 14, but it will cost the same to weld either one. I have a friend (72THING) who is running a D60 rear welded with 4.56s and 39.5 TSLs. He has had no strength problems as of today.
     
  16. ca89blazer

    ca89blazer Registered Member

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    If your lucky tryl finding a motor home with a hd 60 (35 spline) that has 4.88's. Thats what I'm running and it came out of a 1973 winabago brave and I changed the yoke and welded it up. I've been told the winabagos w/ 318 had the 4.88 and the winabagos w/ 440 had 4.56.
     
  17. GMCLegacy

    GMCLegacy 1/2 ton status

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    what is the difference in ground clearence between a D60 and a 14 FF?
     
  18. mudddog91

    mudddog91 1/2 ton status

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    If you dont go with the 14 bolt you will wish you had!!!!!!!!!
    14 bolts rule and dana 60 rears suck................................
    I figured i would get technical since no one else had!!!!!!
     
  19. 79Beast

    79Beast 1/2 ton status

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    I'm not really sure about the exact difference in ground clearance between a D60 and 14Bolt FF, but I would expect nearly 2".
     
  20. 72THING

    72THING 1/2 ton status

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    Easy, mudddog. I thrash the hell out of my truck, 79Beast can attest to that, and my rear axle has held up fine. If you want to drag ass over everything, go ahead with the 14FF. I don't have anything against the 14 bolt, (I almost bought one), so don't start talking bullsh*t when you haven't actually run a D60 rear. There's about 2" of clearance difference. I know the 14FF is stronger, but I've gotten hung up plenty of times with my D60 and 39.5 TSLs and thought how bad it would've been with a 14FF. Obviously thats not the most important thing to consider, but it DOES matter. MY 2 CENTS.

    Will
     

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