I pulled the diff out. The diff gears were moving a bit on the pin. They diff gears were moving side to side and axially. I have not seen a new one so I have no reference. Apart from that there was nothing mentionable........ I might take he diff in to a mini joint and have em look at it.

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I found this spring on the ground just after I pulled the diff....

Might be relevant ? Or just some rubbish I had laying around on the floor?



Image post editted by Mod winabbey

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If it's a rodchange box that's the main gearshift detent spring. It lived under the RH diff side cover. There was a steel ball behind it too...

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Ahh fiddle sticks

How tight should the spider gears be on the pin ?

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When new they have around .004"? clearance.
When worn, the sky is the limit.

If the diff pin wears bad, it looks like this, just before it breaks and punches a hole in yer diff or gearbox housing-

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Oh wow mine is no where near that bad. Most if the movement is on the thrust sides. Should I change out the axle gears too ? They look ok.

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Just on a side note, if this is actually the problem I would get a noise both in forward and reverse right ?

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No the axle gears will be fine.
If the pin is worn the spider gears are too- so replace both.

You won't get noise from worn spider gears, unless the gears have broken into pieces which can happen.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.