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f78 rear diff capacity and seal

Tech Talk for Ford, Mazda, Daihatsu & Makes that currently dont have a home.

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f78 rear diff capacity and seal

Post by greyzook »

Gday, my rear diff is leaking oil from the seal of the backing plate. and i want to obviously fix it. My first questioin is: is ther a seal on the backing plate or is it just a silicone job. And secondly how much oil does the rear diff hold? cheers guys
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Post by tabrocky »

Im pretty sure there would be a gasket there. If it comes off cleanly you may be able to clean it up and put some gasket goo on it.
Id probably just get a new gasket... wouldn't be expensive. More of a time factor to get it.

Not sure on the exact litres of oil, but if you buy a 5L container you will have leftovers, and I think thats the smallest size you can buy anyway.
Don't forget you will need LSD oil for the F78 rear.

Hope this helps.
Cheers.
If it doesn't have two sticks, I don't wana know about it!
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Post by BundyRumandCoke »

There should be a cork gasket behind the cover plate, i assume this is what you mean. My experience with gaskets for Daihatsu's is, hellishly expensive and wait a lifetime for it. Go to Superheap or elsewhere and buy a roll of cork gasket material, probably 3 or 4 mm thick, use the cover as a template, cut it out, punch the holes, then cut about 1 inch smaller for the inside edge. Use some gasket goo on it as well. Job done, with leftover material for the next time you need a gasket. As for capacity, I think they are around the 1.5 litres.
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Post by HotFourOk »

Yeh, 1.5L of LSD Oil

Take some pics if possible when you rip it apart :D
[quote="RockyF70 - Coming out of the closet"]i'd be rushing out and buying an IFS rocky[/quote]
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Post by RockyF75 »

Just done the rear diff bearings/seals on mine (thanks Kane ;) ) and the gasket is about $5 :D , got it from the bearing shop that supplied the bearings, and they had it in stock :shock: Doing just the seal shouldn't be too involved... and don't put it off just do it or you'll wreck the bearings like I did :bad-words: This was on an F75 But can't imagine big there's much difference bar the LSD.
60 + Turbo, 33"s :armsup:
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