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Thread: Quaife 6 speed sequential dog box

  1. #1
    Join Date
    Jul 2009
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    17

    Default Quaife 6 speed sequential dog box

    980 MILES on this Quaife dog box. Removed when CSR sold. Ratios are, 1= 2.4, 1.84, 1.482, 1.260, 1.104 and 6th is 1.00. Comes with shift indicator. Reverse is selected by pulling up on the red ring and pushing foreward.
    Will fit all 5/6 speed Caterhams. Would fit 4 speed Caterham with modification.
    $6250 shipped in USA.

    Email chris@sevenselans.com
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    Last edited by fotsyr; 06-06-2019 at 08:30 PM. Reason: forgot email address

  2. #2
    Join Date
    May 2018
    Location
    Albany, NY
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    Default

    For anybody considering it and researching it, this little piece of background info will help you get less confused in Google searches.

    This is considered the G60 which replaced a very similar Sierra Type 9

    For how annoying these can get in traffic I still can't imagine driving a 7 with a regular box.
    2001 Caterham Superlight R

  3. #3
    Join Date
    Oct 2014
    Location
    Orange County
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    78

    Default

    Will this bolt onto s3 currently running the 6 speed without any modifications?

    Also, is this the helical or straight cut gears?

  4. #4
    Join Date
    Jul 2008
    Location
    Los Gatos, California
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    Default

    https://shop.quaife.co.uk/caterham-6...rdrive-gearbox

    Straight Cut gears, and should bolt up in place of 6 speed.

    Quaife G60 like all sequentials requires frequent service and hates being granny shifted. Only way to keep it going is money shifting it, or you will break it by too slow shifts.

    All info is online, if you search.

  5. #5
    Join Date
    Jul 2009
    Posts
    17

    Default 6 speed sequential

    Quote Originally Posted by vstryker View Post
    Will this bolt onto s3 currently running the 6 speed without any modifications?

    To the best of my knowledge, yes. A 6 speed was reinstalled on the CSR wuth no issue.

    Also, is this the helical or straight cut gears?
    As indicated straight cut.

    chris

  6. #6
    Join Date
    May 2018
    Location
    Albany, NY
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    Quote Originally Posted by alpinaturbo View Post

    ... like all sequentials requires frequent service and hates being granny shifted. Only way to keep it going is money shifting it, or you will break it by too slow shifts.

    All info is online, if you search.
    I have actually have never heard of this. This is neither an easy thing to find as I've tried using obvious key words but they hit on wrong subjects/leads. Do you have any more info on the matter?

    I find that tidbit strange as that nearly every motorcycle is sequential and transmissions are rarely an issue even with typical type of owners who certainly don't research sequential proper shifting techniques prior to ownership of Supersports.

    Don't mean to steal the thread but this is relevant info to any new owner. I certainly don't slam every single gear change going light to light.
    2001 Caterham Superlight R

  7. #7
    Join Date
    Oct 2006
    Location
    Cincinnati
    Posts
    3,521

    Default

    And how frequent is "frequent service?". Every year, every 5K miles, etc? My Google suggests that Quaife dog boxes are pretty stout. And, from experience, the Caterham 6 speed isn't bullet proof.

    I am intrigued by this item. It's for sale at a price that's $1K-$1.5K less than new and I suspect shipping is less than it would be from the UK.
    Last edited by Kitcat; 06-09-2019 at 07:45 AM.
    '97 Caterham Super Sprint, 1700 Crossflow-sold
    '09 Birkin S3, Duratec-sold
    '03 Caterham Zetec track car

  8. #8
    Join Date
    Jul 2009
    Posts
    17

    Default

    Quote Originally Posted by Kitcat View Post
    And how frequent is "frequent service?". Every year, every 5K miles, etc? My Google suggests that Quaife dog boxes are pretty stout. And, from experience, the Caterham 6 speed isn't bullet proof.

    I am intrigued by this item. It's for sale at a price that's $1K-$1.5K less than new and I suspect shipping is less than it would be from the UK.

    NOTE, shipping is included.

  9. #9
    Join Date
    May 2018
    Location
    Albany, NY
    Posts
    128

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    Here is what I'm finding for the curious minded

    With a sequential gearbox the main thing to keep an eye on is the condition of the drive dogs on the dog rings and the main shaft gears as these take a lot of abuse. I would keep a stock of the o rings and seals and a gearbox set of dog rings as an absolute minimum, if you can afford it a spare set of ratios and a gearbox set of bearings would enable you cover a basic failure at the track.
    Dog boxes are better if used positively and placed into gear, but not forced. Being slow and dainty with your shifts will increase the rate of dog wear.
    Plus, you have to rebuild the box every 50hrs or so in hard use.
    Shifting at low throttle load is more difficult and more likely to cause wear because the timing of the torque release / gear shift is less exact.
    4. maintenance.
    Because the dogs and gears wear, the gearbox needs frequent inspection. It's normal to inspect the gearbox after every race weekend, maybe every other depending on how good you are at shifting and how beefy the gearbox is relative to the engine output and tire grip.
    When i do routine rebuilds i check dogs, gears and bearings for wear, damage, irregular wear on gears, chips and cracks. Once a year or subject to use all bearings are replaced.

    It really does depend how you drive and what sort of power your putting through the box.
    Take them with a grain of salt. Most are forum posts. Hard to find any direct info from Quaife. They apparently to not have a set period interval.

    Looks like it's a good time for me to look into inspecting and/or rebuilding mine going into next year.
    2001 Caterham Superlight R

  10. #10
    Join Date
    Oct 2014
    Location
    Orange County
    Posts
    78

    Default

    Thanks for the info. I did search but found there are 2 types of gears available and wanted to clarify exactly what this had.

    Also, what is the length of the input shaft on this as there is a short and long version? Did the 6 speed that was swapped onto the csr had a spacer on the bellhousing? If you could please measure the total length of input shaft, where the spline starts, and total length of spline then i would definitely know if it fits.

    TIA
    Last edited by vstryker; 06-09-2019 at 12:06 PM.

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