Too much play?

[AlanT]

On the niggle fest that is my resto Spit 1500 I get a knock on overrun/slow down. Suspect it’s a tired diff(has the customary Triumph noises). UJs are now good which has removed the rhythmic tapping. 
I know it’s ok to have some slack on the diff to prop rotation, but I’ve a bit on the driveshafts to diff (as per video). Is this the likely source? A problem for a sunny days only car? Car drives well.

Hope ok and then the niggles are over!!
Thanks. Alan

[NonMember]

I'd say that looks like a fairly normal amount of play there.

[AlanT]

Excellent!! I’ll ignore the overrun slow down knock for the time being then. 

[Pete Lewis]

yes thats just the backlash clearance of the differential gears   nothing to do with crown wheel and pinion.

looks  very good really 

Pete

[AlanT]

Thanks. It’s so long since I’ve owned a Triumph (25 years) that I’ve forgotten how much noise is ok vs modern cars. 

[sulzerman]

Looks pretty normal to me!

[johny]

23 hours ago, AlanT said:

On the niggle fest that is my resto Spit 1500 I get a knock on overrun/slow down. Suspect it’s a tired diff(has the customary Triumph noises). UJs are now good which has removed the rhythmic tapping. 
I know it’s ok to have some slack on the diff to prop rotation, but I’ve a bit on the driveshafts to diff (as per video). Is this the likely source? A problem for a sunny days only car? Car drives well.

Much more likely to be exhaust against chassis, diff rubbers worn allowing movement, suspension mounting loose somewhere (rear radius arms....) or gearbox/engine mounts allowing excessive movement?