I've always placed the jack head under the center of the "fat" part of
the diff, at its lowest point, and had no problems with slipping. You
might try rotating the head until it seems like it catches; I think a
diagonal position is best. But definitely get those axle stands in place
-- it could certainly tip side-to-side supported this way.
Louis Mehr (EML) had this to say:
>Good Morning MG World,
>
>This must be a fairly stupid question but here goes anyway ...
>
>I want to jack the entire car up so that I can treat the underside of it.
>
[snip]
>It's not clear to me though which part of the diff to use the trolley jack
>on.
>
>The part at the rear, although it should be stronger, seems awfully
>narrow and the car could easily slip off during jacking.
>
>The part to the front is inclined but by jacking here I would guess that
>there would be a danger of placing excessive stress on the diff housing.
>
>I think the answer is probably to jack on the rear of the diff with
>extreme caution then get the rear on axle stands and then do the front to
>minimise risk if the car should fall whilst jacking the rear.
>
>Please confirm.
>
>Thanks
>
>Louis Mehr
>Manchester
>England
>1971 MGB Roadster LHD California import
>
>
>
--
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Max Heim
mvheim@studiolimage.com
Studio L'Image/San Francisco
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