GQ diff gears into MQ

Post by **GURU** » Mon Dec 28, 2009 12:10 am

G'day all,

I Have a Rear Engined and rear wheel drive Buggy that I need a 3.9 or 4.1 diff ratio in. I am looking at different options at the moment and think a MQ rear diff will work well.

Can I fit GQ 3.9 and 4.1 diff gears to the MQ centre?

Post by **(EST)MahviaDeTyrk** » Mon Dec 28, 2009 1:21 am

GURU wrote:Can I fit GQ 3.9 and 4.1 diff gears to the MQ centre?

No Problem if MQ center is H233B (older ones are H233)
Possible to use GQ gears with H233 too - but then you need redrill bolt holes

Post by **GURU** » Mon Dec 28, 2009 8:58 am

excellent

so what years were the H233b fitted to?

Post by **pongo** » Mon Dec 28, 2009 12:51 pm

surely a 4.3 MQ centre will prob work almost s well as a 4.1. most 4.3 rears have lsd centre std. Shimmy it up and hey presto you have a almost locked rear end cheap as chips

Post by **GURU** » Tue Dec 29, 2009 12:59 am

Well I want tight LSD and most likely 3.9... The ratio is very important as it is the limiter for top speed.. I run 4.6 at the moment and it tops out too low.

Post by **pongo** » Tue Dec 29, 2009 3:00 pm

fair enough, then take a look at cruiser rear diffs, im pretty sure 60 series are direct replacement for MQ and are prob closer to the ratio your after.

Post by **(EST)MahviaDeTyrk** » Wed Dec 30, 2009 4:58 am

GURU wrote:so what years were the H233b fitted to?

Not sure 1986 ???
But look Ring gear bolts

H233
31 spline 32 mm
Ring ID = 146 mm
9 bolts
Bolt ring diameter = 180 mm
10 mm bolts

----------------------------

H233B
31 spline 32 mm
Ring ID = 146 mm
9 bolts
Bolt ring diameter = 176 mm
12 mm bolts

There is possibility to re-drill H233 for 12mm bolts - and if You drill holes out from center it works

(I'm using H233 with 260 series Patrol 5,14 H233B gears)

Post by **WICKED** » Wed Dec 30, 2009 9:46 am

pongo wrote:fair enough, then take a look at cruiser rear diffs, im pretty sure 60 series are direct replacement for MQ and are prob closer to the ratio your after.

You mean the complete housing?

Post by **pongo** » Wed Dec 30, 2009 11:04 am

yep yep, heard it on the grape vine ages ago as people were using these to make it easy to get a high steer arm.

thought about using them to het a full floater rear end in a taller ratio, but opting to carry a spare set of axles in hard trips

Post by **(EST)MahviaDeTyrk** » Thu Dec 31, 2009 6:04 am

GURU wrote:so what years were the H233b fitted to?

10mm ring gear bolts were phased out of the H233B diffs 6/86

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GQ diff gears into MQ

GQ diff gears into MQ

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