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GQ diff gears into MQ
Posted: Mon Dec 28, 2009 12:10 am
by GURU
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?
Re: GQ diff gears into MQ
Posted: Mon Dec 28, 2009 1:21 am
by (EST)MahviaDeTyrk
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
Posted: Mon Dec 28, 2009 8:58 am
by GURU
excellent
so what years were the H233b fitted to?
Posted: Mon Dec 28, 2009 12:51 pm
by pongo
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
Posted: Tue Dec 29, 2009 12:59 am
by GURU
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.
Posted: Tue Dec 29, 2009 3:00 pm
by pongo
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.
Posted: Wed Dec 30, 2009 4:58 am
by (EST)MahviaDeTyrk
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)
Posted: Wed Dec 30, 2009 9:46 am
by WICKED
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?
Posted: Wed Dec 30, 2009 11:04 am
by pongo
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
Posted: Thu Dec 31, 2009 6:04 am
by (EST)MahviaDeTyrk
GURU wrote:so what years were the H233b fitted to?
10mm ring gear bolts were phased out of the H233B diffs 6/86