Well , there ya go.
I should known better than to quote "all the manuals".
I haven't read them all.
And there is always someone with one handy!
If I were Glen Hodges, and if I had a good impact handy , I would give 'er a few good burps. Fer sure.
But.
My collective experience tells me to be conservative on these things.
I have gleaned enough experience with factory service manuals , to come to this conclusion:
They are produced by the factory as a guide for their
trained certified techs.
They are expecting a trained and experienced person , to be using a shop equipped to
their level and specifications.
They are also building these procedures and using these techniques, to support a flat rate of time. They use these rates determine what they will pay the dealership for warranty work.
After that.... Its only intended as a guide. Not a rule.
If you use that manual on a gear case of any kind after its been in service for a number of years, You must consider:
The factory had a NEW pile O parts to make that guide.
Proper Locktite levels were adhered too.
A Gorilla with a brand new Snap-On impact and a itchy trigger finger, was NOT involved!
No rust was EVER present.
So , if you do apply some impaction action... you gotta be conservative and realize the average Joe doesn't know how much is too much.
Thats my two cents worth.