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Spitfire & GT6 Forum

input shaft play

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76SFIRE JASON HOBBS
St. John's, Newfoundland and Labrador, Canada   CAN
Hey Guys,
How much play in my 1500`s input shaft is to much play. I`m changing the engine, and noticed a little movement in it.

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clshore Carter Shore
Beverly Hills, FL, USA   USA
It's not unusual, a standard ball bearing is not good at providing support against radial angular deflection.
When assembled, the input shaft tip is supported by the spigot bushing that's located in the end of the crankshaft.
But sitting free, there is no support, so the tip can easily see 1/4" play in either direction.
What's important is the mainshaft tip is supported by a needle bearing that's located inside the gear on the input shaft.
Put the transmission into neutral, and rotate the input shaft.
Unless you feel roughness in the bearing, or radial play at the inner race (push side-side right at the base where the shaft and race meet, not at the tip),
then it's probably OK.

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76SFIRE JASON HOBBS
St. John's, Newfoundland and Labrador, Canada   CAN
Thanks Carter ,
Great info.

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