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HP Front Diffs.

Tech Talk for Cruiser owners.

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HP Front Diffs.

Post by Bitsamissin »

Seeing I got an absolutely overwhelming response to my front HP 5.29 strength question I thought I would asked this :-

Is the Bundy front HP C&P identical to an 80 Series front HP C&P ??
I remember reading somewhere that the 80 ones are a bit thicker/stronger ?? If so will an 80 series front HP C&P bolt directly into a Bundy ??

Expecting another breathtaking response from the Tojo boys :roll:
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Post by M&M Custom Engineerin »

the bundy and 80 cetres are interchangable.

I dont know of any difference in strength between them.

5.29's.........well, alot of the guys in the US run them and swear by them. The aftermarket gears are supposed to be a hell of a lot stronger than the original toyota gears. Me and Matt have run original toyota 5.29's in our zooks for a while now and not broken them.
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Post by Bitsamissin »

Thanks for that dude.
Yeah the US boys said the same thing about the aftermarket 5.29's.
Are you running the low pinion version 5.29's ??
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Post by M&M Custom Engineerin »

yeah, low pinion original hiace gears.

If we break them we will probably replace them with aftermarket low pinion gears.

Why the high pinion?
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Post by Bitsamissin »

Well the Poojabber has a high pinion front diff so it will make it easier to line up.
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Post by M&M Custom Engineerin »

if you can i would try and run the low pinion, i dont think it would give you as much trouble as the high pinion would. Gearing options are much cheaper too.
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Post by Bitsamissin »

Why do you say not as much trouble ??
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Post by bad_religion_au »

apparently High Pinion diffs are weaker in reverse i have been told (dont know for sure)
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Post by beebee »

bad_religion_au wrote:apparently High Pinion diffs are weaker in reverse i have been told (dont know for sure)


Sounds like there is some confusion on the orientation of the said diff. For front application, HP would be better and LP for the rear.
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Post by bad_religion_au »

when i said in reverse, i meant while reversing. i have been told that a high pinion diff in the FRONT will be more likely to grenade during a reversing manouver.
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Post by ORSM45 »

its because the pinion tries to move away from the crown wheel when in reverse.
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Post by beebee »

bad_religion_au wrote:when i said in reverse, i meant while reversing. i have been told that a high pinion diff in the FRONT will be more likely to grenade during a reversing manouver.


Unless you are reversing up hill, it's no worse than going forwards with a low pinion. As far as I understand anyway :finger:
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Post by bj on roids »

The high pinion will be fine for you Mister Bishi, just never tow in reverse.

Make sure you get a airlocker for the front diff as this will add strength to the crown wheel.

In my opinion I would keep my eyes/ears open for a bundy/80/gq complete front diff cheap. The first one you get cheaperst should be the one you use, GQ you can get 4.8 gears and they are heaps strong.

The 80/bundy diffs are the same, there is no difference in the strength between those two. The high pinions are fine going forwards, if you start reversing particularly up a hill, and or while towing someone they start to hate life. :armsup:
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Post by zerosin »

bj wrote:

In my opinion I would keep my eyes/ears open for a bundy/80/gq complete front diff cheap. The first one you get cheaperst should be the one you use, GQ you can get 4.8 gears and they are heaps strong.




Mmmmm GQ tight fit in toyo housing???
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Post by Surfection »

zerosin wrote:
bj wrote:

In my opinion I would keep my eyes/ears open for a bundy/80/gq complete front diff cheap. The first one you get cheaperst should be the one you use, GQ you can get 4.8 gears and they are heaps strong.




Mmmmm GQ tight fit in toyo housing???


I would say Bj meant a whole front axle, disc to disc. I think Frank will be modifying it either way to drop into the paj so cruiser/patrol won't make a whole lotta difference. :D
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Post by Bitsamissin »

Hmmmmm......................
Pajero front track (centre of tyre to centre of tyre) = 1420mm
Bundera/Hilux front track = 1425mm

Looking good :cool:
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Post by Cheezy4x4 »

Bundy front, DAM, I just happen to have one of them in the corner of the factory ATM. :D
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Post by Bitsamissin »

:D :D
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Post by bj on roids »

Bitsamissin wrote:Hmmmmm......................
Pajero front track (centre of tyre to centre of tyre) = 1420mm
Bundera/Hilux front track = 1425mm

Looking good :cool:



Sounds good then!
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