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HZJ75 9 1/2" front diff conversion

Tech Talk for Cruiser owners.

Moderators: toaddog, Elmo, DUDELUX

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Posts: 207
Joined: Thu Jun 26, 2003 10:02 pm
Location: sydney

HZJ75 9 1/2" front diff conversion

Post by turbo4t »

Does anyone know of any problems converting a solid axle HZJ back to the HJ front diff? I want to replace the whole diff to go back to the big centre. I can deal with any brake fluid proportion problems if any. Cheers
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Post by bad_religion_au »

is it just to stop blowing your front center? if so, you can upgrade the carrier bolts, and throw an ARB or detroit carrier in and that should strengthen things enough
Spit my last breath
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Post by turbo4t »

bad_religion_au wrote:is it just to stop blowing your front center? if so, you can upgrade the carrier bolts, and throw an ARB or detroit carrier in and that should strengthen things enough
More for interchangeability. I don't like the Hilux centre. The big ones are so much easier to find.
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diffs

Post by 75 cruser »

im fairly sure the latter model ones are a little bit wider than the early diffs

rob
come on move over and let the 75 through
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Joined: Mon Jun 06, 2005 6:33 pm

diff

Post by tobie »

g'day mick

from memory the later 75x had stronger c'v

i have seen before using a early 75x center and housing and putting later model 75x cv to make a strong diff

will bolt straight up
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Re: diff

Post by dumbdunce »

tobie wrote:g'day mick

from memory the later 75x had stronger c'v

i have seen before using a early 75x center and housing and putting later model 75x cv to make a strong diff

will bolt straight up
the later CV's don't fit in the early housing. it might be possible to clearance the housing to fit the bigger CV's but it's a pointless mission.

There may be clearance issues with the diff and the bottom of the motor - the engine is slightly more central and probably sits a bit lower in a HZJ/FZJ than in a FJ/HJ. If you have some lift involved it probably isn't a problem. frame and spring spacing is the same. might have to fiddle with prop shaft flanges. Personally I think it's a pointless swap, there is plenty of high pinion front diffs to be had out of 80's and 7x's and the 8" is arguably as strong or stronger than the 9" with less weight and better clearance.

cheers

DD
Free air locker to the first 20 callers!
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Post by goannaoffroad »

The early diff' assembly will bolt straight in with no problem's but t/shaft
need's to be changed.
The smaller diff' fitted to hzj75 and 80's are much stronger than a hilux
I'd rebuild 5 rear diff's to 1 front on vehicles that see a fair bit of offroad use.
Goanna Off Road, Out the back in the shed.
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diff

Post by tobie »

sorry post was not in detail enough, we swapped over the ball joint knuckles as well
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Post by turbo4t »

Thanks for the replies. Something to think about...
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