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MG Midget and Sprite Technical - prop shaft

just fitting 1500 engine with overdrive gearbox in my replacement shell and even though the propshaft fits its tight with no movement on the yolk , would it be advisable to have some movement in and out on the yolk i had about 10mm movement when it was in last shell.
mark heyworth

I imagine you do need to have a bit of slack, as the distance between the diff and the gearbox will vary as the suspension goes up and down. If there's no slack I guess the transmission/engine will be pushed forwards or worse the diff pushed back causing the axle casing to bend? It would also put the UJs under strain too.

Just my thoughts....

J Smith

If 10mm is all you need, then there is usually some available on the engine mounts to move the engine forward a tad, but keep an eye on fan and crank pulley clearance. Mine worked out that way OK on a 1275/T9 though with a home made gearbox sub-frame.
GuyW

Shirley you have to allow for the angle of the dangle.
Nigel Atkins

Surely not Shirley. 😉
anamnesis

I agree though. If it's a sliding yoke, there must be amount available, otherwise as J Smith says, there is going to be a problem as the prop is pushed forwards by the diff pinion.

If you can get someone to heave down on the rear, you may be able to measure how much movement you need, and get it the way Guy described.
anamnesis

This thread was discussed between 06/10/2021 and 07/10/2021

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