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Rotar to disc conversion?!?

Discussion in '2nd Gen. Tacomas (2005-2015)' started by azmikeymike, Jan 24, 2011.

  1. Jan 24, 2011 at 6:48 AM
    #1
    azmikeymike

    azmikeymike [OP] Member

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    I have been looking for a rotar to disk conversion kit for the truck.. Anyone have any ideas?
     
  2. Jan 24, 2011 at 6:54 AM
    #2
    cc350

    cc350 Buckeye Member

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    Do you mean a Drum to Disc conversion?
     
  3. Jan 24, 2011 at 6:56 AM
    #3
    joerussell610

    joerussell610 When all else fails read the directions

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    Wrong area brother.. Move it to 2nd gen... And I had ask the same question awhile ago. Wifes 4Runner has disc on rear why not Tacoma? Issues with clearance and booster.. Not worth the money for the pay off..

    ugggh.jpg
     
  4. Jan 24, 2011 at 6:56 AM
    #4
    cc350

    cc350 Buckeye Member

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  5. Jan 24, 2011 at 6:58 AM
    #5
    TacoDaTugBoat

    TacoDaTugBoat Well-Known Member

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    I'VE THOUGHT OF DOING THIS SOMEDAY, BUT NOT AT THAT PRICE.
     
  6. Jan 24, 2011 at 7:16 AM
    #6
    mjp2

    mjp2 Living vicariously though myself Moderator

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    Pardon my yelling, but DO NOT BUY THIS PIECE OF SHIT KIT.

    Braking performance will be worse than with your drum brakes, the parking brake will not hold the vehicle, the driver's side caliper rubs the shock when the suspension articulates, and the calipers are crappy obscure ones off of a 1987 Ford Thunderbird 4 cylinder turbo coupe. I've gone through 4 of them so far and each time it's a special order because no stores stock the things.
     
  7. Jan 25, 2011 at 4:25 AM
    #7
    azmikeymike

    azmikeymike [OP] Member

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    word thanks for the info.
     
  8. Jan 25, 2011 at 4:58 AM
    #8
    Brunes

    Brunes abides.

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    Moved over to the 2nd Gen Forum...and mjp2 is probably the best person to comment about this....
     
  9. Jan 25, 2011 at 6:17 AM
    #9
    yotatoy

    yotatoy Well-Known Member

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    don't do it
    i had a friend that did it on his and nothing but problems
     
  10. Jan 25, 2011 at 8:11 AM
    #10
    4X42HEL

    4X42HEL Don't really understand 2WD trucks....

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    Ugh,

    I wish there weren't comments like that (well, more correctly, I wish there was a kit that worked, didn't have issues, and didn't cost your first born).

    I want to do the same conversion, and definitely -35 points on Toyota's end for not having this standard (or even an option????)

    Nonetheless, thanks for those who chimed in with real experience and saved many of us some coin and trouble.

    Discs would be awesome (and are far superior to drums, IMO).
     
  11. Jan 25, 2011 at 8:14 AM
    #11
    mjp2

    mjp2 Living vicariously though myself Moderator

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    All other issues aside, you won't find a functional setup that uses the stock master cylinder.

    Drum brakes require fluid volume at a higher pressure.
    Disc brakes require more fluid volume at a lower pressure.

    It's not possible to flow more fluid without replacing components, and the FJ (comes with rear discs) master cylinder does not bolt up to the Tacoma.
     
  12. Jan 25, 2011 at 8:19 AM
    #12
    4X42HEL

    4X42HEL Don't really understand 2WD trucks....

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    Sounds like you have done some good research on this. Too bad, even the GM's offer rear discs. I was really surprised that Toyota doesn't address this. As a consumer, I promised myself my next ride would have rear discs... then I bought the Tacoma... couldn't resist.

    Discs are cheaper to maintain across the board and have fewer failure points. Maybe Toyota can listen and implement this change in future builds.
     
  13. Jan 25, 2011 at 8:22 AM
    #13
    mjp2

    mjp2 Living vicariously though myself Moderator

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    Unlikely. After all, relative to the other trucks in the Tacoma's market segment, the Tacoma with drums has the best stopping power.

    Order some SP Performance slotted rotors and Hawk pads from RaceShopper.com, get some stainless steel brake lines, bleed the whole system, and keep your rear brakes properly adjusted by doing it manually every few months.

    You'll be very pleased with the performance and you'll save yourself a ton of cash and aggravation.
     
  14. Jan 25, 2011 at 9:25 AM
    #14
    inouk

    inouk Well-Known Member

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    Drums on older cars never failed. They are proven, don't worry about it. For all-around cars, not racing cars, rear drums are effective and more than enough. :cool:

    I once had a Jeep Patriot with disk on 4 wheels and the braking power isn't higher than the Tacoma. In fact, my Tacoma with rear drums has a best braking power of all car I owned. It brakes so well that I don't need more. It all depends of the design and parts. So, I agree with mjp2.

    Anyway, it's on the front that the brake pressure is higher. Something like 70% front, 30% rear.

    I don't understand the desire to put rear discs, except maybe for cosmetic purposes. I don't think you speed at 200 miles per hour and you don't use brakes more often than driving (heat buildup) ...

    If you need more braking power, well, go see your dealer, because something's wrong with your truck :confused:
     
  15. Jan 25, 2011 at 1:05 PM
    #15
    buddywh1

    buddywh1 Well-Known Member

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    What does it do to ABS?

    Does it do anything to proportioning valve to increase fluid pressure to the rear? That's why performance is so bad.... might as well just cap off the brake lines and not worry about replacing pads. At least they'll look cool.

    And don't carry anything heavy where you'd need rear brakes.
     
  16. Jan 25, 2011 at 1:09 PM
    #16
    buddywh1

    buddywh1 Well-Known Member

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    I think that's backward about pressure...discs need more hydraulic pressure.

    Drums are self-servoing in that the rotation of the drum acts on the trailing shoe to make it bind tighter, with less hydraulic force. Some designs are dual-servoing with a link that transmits the force to the leading shoe and it binds tighter too...really common on trucks. I'm not sure if this one is.

    But it makes sense disks get along with less volume because the piston isn't pulled back into the caliper after each actuation and work their way outwards as the pads wear. Wheel cylinders, conversely, have two pistons and travel the total distance each time as they are pulled fully back into the cylinders by springs after each actuation. The adjusters working on a fulcrum make up the travel distance of the shoes as they wear.
     
  17. Jan 25, 2011 at 1:49 PM
    #17
    mjp2

    mjp2 Living vicariously though myself Moderator

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    Nope, that wasn't a typo. Discs take more fluid with less pressure. Drums take more pressure with less fluid.

    Consider the volume inside a wheel cylinder vs. a caliper.
     
  18. Apr 14, 2011 at 8:42 AM
    #18
    dubbedSinner

    dubbedSinner blisters

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    very informative thread, I have been wanting to put disk on the back of my truck mainly for looks and also to improve braking since I have bigger wheels. I wanted to put drilled or slotted rotors with better pads to increase the performance.

    So it looks like the only option would be to retro fit an FJ master cylinder and maybe take other parts off of an FJ to make it work?
     
  19. Apr 14, 2011 at 8:47 AM
    #19
    RedTaco2134

    RedTaco2134 Well-Known Member

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    I did this on my 90' 4runner. there is welding involved, and you need a Wilwood proportioning valve, other than that it was a fairly simple install. I never had any problems. Check out Pirate4x4.com for more info on switching drums to disc on a Toy 8" rear. BTW I used the stock booster as well. The price for that Rear conversion kit is not bad at all. The kit I had to piece together using a write-up a mod gave me from Pirate4x4, and on my 90' 4runner i spent at least $630.
     
  20. Apr 14, 2011 at 8:48 AM
    #20
    mjp2

    mjp2 Living vicariously though myself Moderator

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    Pretty much. You'll be in for a bumpy ride getting everything set up properly. It's possible, but it's not a bolt-on.
     
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