GQ Nissan Patrol Diffs into a Discovery

When i'm home next i'll try grab some pics.

I'm just running standard headers, so thats the difference. I could imagine that the extractors would be an issue.

I used the large uni nissan driveshaft with a custom flange at the TC end and had it shortened to suit.

I believe that there is a transfer uni available to suit the smaller nissan shaft, which couples to an off the shelf flange that fits the standard rover uni.

Flanges are as parrallel as i can get them.

Seems to work ok, there are a few vibes but nothing horrible.

Dave

Dave did you think about flipping the rear housing over 180, will have to spin the pan, and probably re drill the diff studs, but you should be able to offset that pinion closer to the right then (leave the centre in its correct position, just flip the housing(if it'll work))

vern, i thought about that after i had already welded my mounts on, if you flip the centre you then have a reverse rotation diff so have to flip the housing to correct (therefore you end up twice as far to the side which is better. looks like you would have to sort the mounting studs and the pan as you said, but would be an easier option than lc in my opinion

Can I ask for clarification here?

Are you suggesting turning the diff centre upside down then turning the housing front to back and side to side.

If so then this would mean (before pans are cut etc) that the hole for the diff would be facing the right rear side of the car when it started facing the front left side - is that correct?

I have a LSD GQ installed but yet to get it driving - will be on road about Xmas or Jan latest. If I don't like it then I have another GQ axle and diff that I might try this option with - if I can get it clear what is involved.
Thanks
SKiboy

No didn't bother, the offset gain is so little that i doubt it would be worth it.

Skiboy, the diff centre remains in the same orientation before, but the diff housing is flipped 180 degrees (ie the lh axle is now the rh axle and so on). Because of the housing is flipped, the diff pan is now on the wrong side for the crown wheel gear,so it needs to be cut off then re welded to suit. The studs need to be redrillled to suit the new position of the diff centre relative to the housing, and the housing needs to be clearanced to suit the crown wheel gear.

Cheers, Dave.

Thanks Dave

Now I follow - so this gives a slight off set but a higher pinion - so reduced the pinion angle a little but main advantage is that it would help in terms of knocking the pinion in the rough so has merits.
Skiboy

no the pinion height stays the same but it is ofset to the right, its a different way of changing left and right axle tubes essentially, front centre is the way to go high pinion. flipping the housing/centre or changing axle tubes will give you a few inches, i did not realise the housing needs clearancing, maybe internally laminating and changing axles and tubes left to right is the way to go

Quote:

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Originally Posted by mopar

no the pinion height stays the same but it is ofset to the right, its a different way of changing left and right axle tubes essentially, front centre is the way to go high pinion. flipping the housing/centre or changing axle tubes will give you a few inches, i did not realise the housing needs clearancing, maybe internally laminating and changing axles and tubes left to right is the way to go

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The clearancing is minor.
Still much easier than swapping tubes IMO.
The only thing is that the brackets that ok the GW housings will be upside down, so brakes will be upside down??

Dave.

I meant spin the housing over 180 but leave the centre where it is, therfore you would have to re do studs, pan and may'be brake brackets. Should be able to reuse axles, will put the pinion over about 90mm.
Anyway it was all to hard for me so bought a rear disc sals and am building a front sals to go in it.:D

were on the same track a vern, but the more i think about it the more i think that cutting and shutting the tubes might be easier, provided you wanted the extra strength of internal laminating (smaller tube pressed into outer axle tube) then you would just have to cut both axle tubes an equal distance from the centre and machine up the internal sleeve then press and weld together