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    Re: My quick change FNR idea...
    #11
    Bend-Tech Dragon Master
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    Quote Originally Posted by deaner View Post
    Wouldn't it be easier to couple it right to your RAV4 tranny? Or would the engine be offset too much?
    It would be HEAVY and ratios would be way high.
    Honestly besides time I'm sure I'll have close to rav4 transmission $ in the parts.

    <70 QC gears
    ~70 Sprockets
    <50 Bearings
    Not sure on materials, I think we some stuff laying around.
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    Re: My quick change FNR idea...
    #12
    Bend-Tech Dragon Master
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    Quote Originally Posted by deaner View Post
    Now it makes more sense. I would use three smaller diameter QC gears instead of chain,and maybe gears from a transmission that had synchronizers/sliders/shift fork.
    I'd need ~ 3 set of QC gears, chains are cheap.
    I could even do double row chain if needed.
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    Re: My quick change FNR idea...
    #13
    Senior Member deaner's Avatar
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    Quote Originally Posted by JGSturbo View Post
    I'd need ~ 3 set of QC gears, chains are cheap.
    I could even do double row chain if needed.
    Yea, but chains need idler for tension,they stretch, and they break. Use transmission gears, they are cheap.
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    Re: My quick change FNR idea...
    #14
    Bend-Tech Dragon Master
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    Off subject but this would give 7:1 w/ my QC gears I just bought...
    1991 BMW 325i Automatic Open Differential E30 Diff | eBay
    $175 shipped w/ 6 bolt CV flanges. Love the price of BMW diffs.
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    Re: My quick change FNR idea...
    #15
    Bend-Tech Dragon Master
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    Quote Originally Posted by deaner View Post
    Yea, but chains need idler for tension,they stretch, and they break. Use transmission gears, they are cheap.
    Funny you say that as all RPM setups usually use a chain.
    Its just for reverse and with turning brakes in the sand it would be just for backing out of camp/trailer... maybe the occasional deadend trail.
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    Re: My quick change FNR idea...
    #16
    Millenium Member nutz4sand's Avatar
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    Quote Originally Posted by JGSturbo View Post
    Funny you say that as all RPM setups usually use a chain.
    Its just for reverse and with turning brakes in the sand it would be just for backing out of camp/trailer... maybe the occasional deadend trail.
    The RPM's I have seen inside were all gears I believe.

    The other guy with the diff reverse box (tom pro? or???) used a chain to drive his diff setup. I know this cause I seen one break and bust out the case. It drove the diff at all times.

    EDIT: or are you talking just to drive the RPM's input?
    Now that NOBAMA has PROVEN he is the absolute WORST president in the history of history Jimmy Carter can thank him for stealing the dunce crown.

    Lets hope the next guy repeals NObama care along with the rest of the stupid crap this blight on our windshield has done.
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    Re: My quick change FNR idea...
    #17
    Senior Member deaner's Avatar
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    Those BMW diffs are the ticket. I picked one up at a u-pull-it a few years back for a project and it was 40$ IIRC.
    I know everybody uses chains and most of them have problems with them at one time or another. Yours would be in the best possible spot for wear and tear (assuming oil bath), worst for replacing. Would it hurt to go with a 60 or 60H chain?
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    Re: My quick change FNR idea...
    #18
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    Quote Originally Posted by nutz4sand View Post
    The RPM's I have seen inside were all gears I believe.

    The other guy with the diff reverse box (tom pro? or???) used a chain to drive his diff setup. I know this cause I seen one break and bust out the case. It drove the diff at all times.

    EDIT: or are you talking just to drive the RPM's input?
    I was referring to the RPM input. The reverse chain is only used as a primary reduction where a chain box would be the secondary reduction. As again- only reverse.
    The QC gears handle big block V8s, no worries.

    Here's the latest drawing, added bearings, shift fork, etc.


    Hoping std rubber sealed bearings will negate extra seals for the oil bath. Those QC gears will move a lot of oil.

    I wonder if I make the dogs over lap the QC gear engagement it could be a FPR (F-Park-R) lol. Might help the QCs re-engage, slightly roll the car back with pressure on the lever to find mesh.
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    Re: My quick change FNR idea...
    #19
    Vendor yoshi's Avatar
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    Quote Originally Posted by nutz4sand View Post
    The RPM's I have seen inside were all gears I believe.

    The other guy with the diff reverse box (tom pro? or???) used a chain to drive his diff setup. I know this cause I seen one break and bust out the case. It drove the diff at all times.

    EDIT: or are you talking just to drive the RPM's input?
    They break because the chain is after a gear ratio from the motor to the box. They see considerably more load, and when they do break, they are under a pretty good hp load from being rapped out.

    The reverse chain designs he posted see a 1:1 ratio, they are in oil and they will only be used for backing up. I don't see how it could ever break as it will be just as strong as any chain drive reverse box setup and he will be capable of a lot more abuse than what it will ever see in reverse.

    My gearbox design is similar to this and I initially was going to use a chain for reverse, but was able to locate a 3 gear setup that is considerably stronger, doesn't require a tensioner, is cheaper than a chain/sprocket setup and i've eliminated the reverse engagement backlash, so it was a no brainier for my application.

    His chain idea, as pictured, is sound. I would just recommend running a non o-ring chain.....
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    Re: My quick change FNR idea...
    #20
    The Bob Ross of MBN Bullnerd's Avatar
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    My reverse design looks like a flip phone and you hold it up to your mouth and say "beam me back ____ feet" and it converts you and your car into sub-atomic particles, moves it to the new location and re-assembles it. No chains involved at all!
    "Speed is time-time is speed"-Dennis Hopper

    Quote Originally Posted by TALON View Post
    did you use a special bigfoot camera or something ,you know all blurry could be a tree stump kinda thing .
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