Input gear I think, si broke them apart earlier for me and said the splines from the shaft were stripped the ones that put them together
 
Ahhh bugger, well ill see how it is once I've had a look. Was free anyway so no loss if it gets binned
 
to change m/s needs full strip it will most likely be best to fit new bearings and new outer baulk rings at the same time ,google these parts , tud101270,ftc3584 x 4 ,ftc5018 x2 ,ukc8l,stc1628,ftc248,ftc317,rtc6751,ftc2385,ftc3371, ftc5303 and ftc2383 i have got good used v8 input shafts
 

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