Thread: Ashcroft ATB

Originally Posted by 123rover50

I am looking at a front diff assembly sitting on a shop floor. It is supposed to have an AATB installed. How can I tell without unbolting everything ?Keith

Definitely talking Ashcroft? or some other make but just calling it AATB? Are they made for series vehicles - Ashcroft site does not seem to say so. Are you actually looking at a series assembly or something more modern that does more than 80 km/hr? Some clever adaptation?

Ask for a receipt of purchase if the person is the original purchaser? The replaced Rover diff? Where's the rest of the vehicle - who owned it before hand?

A Rover diff has a some what open framework. I've installed the AATB centre diff, which is lockable - diff ATBs are not lockable. If the diff ATB is similar in construction to the centre ATB then then it will be quite a solid 'lump' of steel.

You may get a hint of what is in the case by opening the drain plug. Looking down the axle shaft is a long shot (pun intended) to see either a rather open cage structure or more of enclosed tunnel - side light from an open drain plug may help.

Unbolting the diff is not to much of a big deal (with axles removed), easily sealed again, Won't hurt anything. And well worth it if there is good savings.

Dave Ashcroft is generally quite happy to shoot of a short answer to customers.

Limited Slip Differentials – Ashcroft Transmissions

Middle picture here shows open framework just before the large gear Rover type diffs - Ashcroft Transmissions