mx5 diff problems

[jason 82]

Has anybody bought a Talon mx5 diff cover ? Do they sleave the diff, or do they replace bits ?

[Talonmotorsport]

All the cast ali cover does is hold the oil seals in place and act as an oil bath for the diff. The fabricated cover will need 2 new oil seals pushing in place and takes the standard drain/fill plugs with the vent. It also provides a 6mm thick plate with 4 M12 bolt holes that I doubt most people will be able to break in normal use.

[Davidbolam]

Originally Posted by Talonmotorsport

All the cast ali cover does is hold the oil seals in place and act as an oil bath for the diff. The fabricated cover will need 2 new oil seals pushing in place and takes the standard drain/fill plugs with the vent. It also provides a 6mm thick plate with 4 M12 bolt holes that I doubt most people will be able to break in normal use.

Will it work on bolt on driveshafts?

1.6 or 1.8?

David

[Talonmotorsport]

I would have thought the ends of the out put stubs would be the same as the 'push in' type,but you never know. I must confess I don't have the 'bolt on' type diff or drive stubs to look at.

[Numplumb]

When Mazda designed the Ali part of the diff with fins for cooling and size for lubrication will it not get to hot or not be lubricated enough with your design?.

[baz-r]

Originally Posted by Numplumb

When Mazda designed the Ali part of the diff with fins for cooling and size for lubrication will it not get to hot or not be lubricated enough with your design?.

weld on some fins then?

[Davidbolam]

I was speaking to Westfield today and they have had no reports of broken differentials on their cars. Theirs appears to use the normal mounts with a solid nose mount.

David

[Talonmotorsport]

Did Westfield have to redesign the back end of their car to accommodate the cast ali cover? The whole point of this cover is that it allows the use of the mx5 diff to be fitted to a standard book spec chassis with out a major redesign.
As for the cooling effect of the fins on the the mazda casting they are there due to the limited amount of oil that it contains, the oil used in the diff does get warm during normal use and should be changed every 30,000 miles or so. If you compare the amount of oil that the fabricated cover holds to the Mazda item I'm hoping that the extra capacity should keep the temp down. Those that have any concerns about diff oil cooling then you could always duct passing air towards the diff the same as a race car has brake cooling ducting.

[Short]

But I thought the 1.6 diffs were not finned? or am I wrong?

If they are, I understand there smaller, and would generate less heat, but with the lightweight chassis of the roadster, they wont be under as much stress, so should in theory generate less heat.

[Stot]

There are 1.6 with and without fins. Mine has fins.

Phils box has a lot more oil in it though as the internals wont be formed around the diff gears the same way the OEM one is so theres more dead space. This will help a lot with cooling.

Cheers
Stot