Triumph Sprint Gearbox

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alanworland
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Triumph Sprint Gearbox

Post by alanworland »

My mate has just got his restored Sprint running today which is quite quiet, except when the clutch is released! it then has a whirring drone!
Does anyone know if these boxes are prone to this? - sounds like layshaft bearings or first motion shaft gears.
Are parts common with other units?
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pfgiz
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Post by pfgiz »

I had this on a Dolly 1850, it was the thrust bearing in the end....
Peter Gisby.

bmcecosse
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Post by bmcecosse »

Double post deleted!
Last edited by bmcecosse on Thu Nov 19, 2009 5:34 pm, edited 2 times in total.
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bmcecosse
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Post by bmcecosse »

If you mean - gearbox in neutral and the clutch pedal NOT pressed - then yes it could well be the release bearing just lightly touching the pressure plate. Is the gearbox oil correct level and type?
These gearboxes are plentiful and generally unwanted - we don't use them on our TR7s!
Last edited by bmcecosse on Thu Nov 19, 2009 5:35 pm, edited 1 time in total.
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alanworland
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Post by alanworland »

Yes, in neutral, pedal not pressed - quite a drone, sounds too heavy and deep for a thrust bearing (which is new) I assume he has the correct oil in it. Sound goes when pedal pressed. Were different oils specified? I dont know what it should be.
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bigjohn
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Post by bigjohn »

is it the overdrive box? i had a vauxhall viva hb gt with the vx4/90 overdrive box fitted,and that droned when in neutral but when the pedal was pressed it stopped,turns out it was the bearings in the overdrive unit i had the unit reconed and it was fine after that
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alanworland
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Post by alanworland »

Yes, it has the overdrive unit fitted. Will have to get under while it's doing it to try and pin point it. Thanks
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