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Joined: Aug 2011
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Talk Morgan Regular
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Joined: Aug 2011
Posts: 898
The 3 wheeler uses a 5 speed MX5 Mk3 box that are not too choosy with gearbox oil.

The six speed MX5 Mk3 boxes like Redline MT90 or Castrol Syntrans Multivehicle. These improve gear changing at low temperatures and are GL4 oils (gear oils) which are not too slippy like GL4/GL5 oils ( Diff oils with EP additives that are too slippy for the gear synchronisers.)

There are no favoutite among the MX5 community with regards to oils for the 5 speed box but I would use a GL4 oil. I have changed gearbox oil in loads of MX5's.

Last edited by Eddie Cairns; 03/10/19 08:58 PM.
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Talk Morgan Addict
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Originally Posted by Dab of oppo
That'l be the gearbox, the bit in the middle.

The bit at the back can be known as: back axle, final drive or Diff. Depending on who you are talking to.


Thank you👍


2019 M3W Sold and is now in Las Vegas enjoying the showgirls :-)

Joined: Mar 2015
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Talk Morgan Regular
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The bit in the middle, love it.

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Talk Morgan Enthusiast
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Talk Morgan Enthusiast
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on old goldwings we simply call the rear drive box as a pumpkin


Rodger
2018 M3W "Dreamers on the Rise"
2004 Plus 8 (wife's)
old Goldwings and a couple of Harleys
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Talk Morgan Addict
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Like banjo housing for the rear end


2019 M3W Sold and is now in Las Vegas enjoying the showgirls :-)

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L - Learner Plates On
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L - Learner Plates On
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The gearbox filler is a 14 mm square drive - which I would suggest you get as the bolt fuses to the Au housing and can become slightly stiff!

A tip if you are going to drain either - remove the filler bolt first just incase you have problems getting them off and you have already emptied the box.

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