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.

Thick gears ? Standard gears ? Why use one or the other ?

Discussion in 'The Garage' started by mudslinger99, Jun 23, 2005.

  1. mudslinger99

    mudslinger99 1/2 ton status

    Joined:
    Oct 8, 2004
    Posts:
    512
    Likes Received:
    0
    Location:
    East Coast
    So what is the difference ?

    If they make both for the 14 boltff why would one be a better choice over the other ?

    I see people all the time say they got thick gears and then the next person says they got standard gears for the same 14 bolt ff.. So are the thick gears stonger or what ?

    Lets hear the reasons you would choose one over the other ?
     
  2. 74 chev

    74 chev 1/2 ton status

    Joined:
    Sep 30, 2004
    Posts:
    159
    Likes Received:
    0
    Location:
    Concord,CA
    thick gears are for if you have a 4.10 and numerically lower carrier and you want to run a numerically higher ratio than 4.10.
     
  3. Fubeca

    Fubeca 1/2 ton status

    Joined:
    Dec 18, 2002
    Posts:
    2,100
    Likes Received:
    2
    Location:
    Denver Area
    Like he said.

    The higher the gear ratio (numerically low) the larger the size of the pinion gear. There are two different carriers with different offsets to accomodate the larger pinion gear without having very thick or very thin ring gears.

    Thick gears allow us to use the gears without replacing the carrier. I think it is mostly a cost thing for the manufacturer. The thick gears aren't that much more expensive -- but when you are making thousands of them it adds up. Thick gears also make it a little tougher to service the spider gears. Sometimes you have to remove the ring gear to get the cross pin out (can be very difficult with some c-clip axles :D ).
     
  4. mudslinger99

    mudslinger99 1/2 ton status

    Joined:
    Oct 8, 2004
    Posts:
    512
    Likes Received:
    0
    Location:
    East Coast
    So lets se if I got this right..

    It is not a personal choice it is more dependent of which carrier you have ?

    If that is the case how do you tell which carrier you have ? So you can figure out if you need thick or standard gears..
     
  5. Fubeca

    Fubeca 1/2 ton status

    Joined:
    Dec 18, 2002
    Posts:
    2,100
    Likes Received:
    2
    Location:
    Denver Area
    If the truck came stock with 4.10 or numerically lower gears you will need thick gears to go numerically higher than 4.10. If it came with 4.56 or numerically higher you would need regular gears to go above 4.56.
     
  6. mudslinger99

    mudslinger99 1/2 ton status

    Joined:
    Oct 8, 2004
    Posts:
    512
    Likes Received:
    0
    Location:
    East Coast

    Well that would be alright if you knew what the truck came with stock :grin: But it really dosen't answer the question on how to tell what carrier you have now ?

    Lets say you don't have a truck but just the axle and you want to know what gears you need to order thick or standard how would you tell what carrier you have ?

    Also how do you know if you all ready have thick or standard gears without having both in front of you to decide which one is thicker ?

    Think about how many axles swaps have been done on these older trucks so there is really no way to identify what gears come in the truck the axle came from the factory just by looking at it..
     
  7. Muddytazz

    Muddytazz 1 ton status

    Joined:
    Jun 30, 2002
    Posts:
    20,073
    Likes Received:
    0
    Location:
    Salem, Or.
    What gears are in your rig now?
     
  8. mudslinger99

    mudslinger99 1/2 ton status

    Joined:
    Oct 8, 2004
    Posts:
    512
    Likes Received:
    0
    Location:
    East Coast
    I have 4.10's in it now but I'm not sure what it came with from the factory..
     
  9. Muddytazz

    Muddytazz 1 ton status

    Joined:
    Jun 30, 2002
    Posts:
    20,073
    Likes Received:
    0
    Location:
    Salem, Or.
    if you want to go to 4.56, 4.88 or 5.13 you'll either need a new carrier for the standard gears or get the thick gears and keep your current carrier.


    The actual stock gears have nothing to do with what you actually have currently. You just go by what gears you currently have.


    Is that a little bit more understandable?
     
  10. mudslinger99

    mudslinger99 1/2 ton status

    Joined:
    Oct 8, 2004
    Posts:
    512
    Likes Received:
    0
    Location:
    East Coast
    Ok so your saying if you have 4.10 now then it is not possible to use 4.56 standard gears you would need thick gears correct ?

    So what about the other questions ?

    How do you know if you all ready have thick or standard gears without having both in front of you to decide which one is thicker ?

    If you have 4.56 gears how would you know if they are thick gears or if the carrier had been changed to accept 4.56 standard gears ?
     
  11. blazerpro79

    blazerpro79 1/2 ton status

    Joined:
    Jan 4, 2005
    Posts:
    528
    Likes Received:
    0
    Location:
    Simi Valley, CA
    so if you have 3.73s and you are buying 4.56s you need to get thick gears right?
     
  12. jekbrown

    jekbrown I am CK5 Premium Member GMOTM Winner Author

    Joined:
    May 19, 2001
    Posts:
    45,029
    Likes Received:
    362
    Location:
    Vancouver, WA, USA
    yes... if you have something 4.10 and lower (numerically) you have the 4.10- carrier... they don't make gears for the 4.56+ carrier that work in the 4.10- carrier. If you have 4.56, 4.88, 5.13 gears you might have either carrier... but if my understanding is correct, its impossible to have 3.73s or 4.10s on a 4.56+ carrier...

    j
     
  13. blazerpro79

    blazerpro79 1/2 ton status

    Joined:
    Jan 4, 2005
    Posts:
    528
    Likes Received:
    0
    Location:
    Simi Valley, CA
    good bc i bought thick gears to put in mine. going from 3.73 to 4.56, but i have new plans and dont think the 4.56s will be man enough for 38s
     

Share This Page