40 sereis diff pinions

Post by **bugz** » Thu Dec 02, 2004 4:08 pm

wanting to know are the diff pinions the same in front and rear diffs on fj40, i need to know as i've snapped two pinions in two weeks and only have a spare front diff to retrieve parts from . want to know if its compatable other wise will leave it alone and buy a new pinion.

Post by **beanz2** » Thu Dec 02, 2004 4:13 pm

Front and rear are the same, but I was told to try to keep the crown and pinions together as a matching pair as they wear in together.

Deve

Post by **RAY185** » Thu Dec 02, 2004 6:12 pm

can I ask how you are snapping them? Do you know? Are you running BIG tyres?

Post by **Ace** » Thu Dec 02, 2004 7:15 pm

his springs have sagged on the back and the diff twisted under load going up a very rutted section hopefully new springs will fix :twisted:

Post by **RAY185** » Thu Dec 02, 2004 7:55 pm

ok, I broke my pinion a few weeks back on an OL trip and it was my first trip on the 35s I just put on. I thought the extra stress of turning these things might have been one of the reasons for it, but also from looking at the brake it looks like it was slowly going/metal fatigue.

Post by **80UTE** » Fri Dec 03, 2004 5:43 am

Very common for the 1977 and earlier the break the pinion shaft at the end of the spline ( pre 1978 coarse spline ) . 1978 and later had the fine spline pinion shaft and were heaps stronger.

wally

Post by **RAY185** » Fri Dec 03, 2004 10:18 am

Thanks Wally

sorry, just funny that I can say that and get away with it! :armsup:

Yeah I replaced my coarse spline diff with a later model full floater fine spline so hope to not have that problem again.

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40 sereis diff pinions

40 sereis diff pinions

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