Hello,

I usually have all the available new parts in stock for an M400/M410. I even have some parts that aren't available new from any other sources.

Unfortunately, new M400/M410 synchros have been NLA for a long time.

Every once in a while a single or pair of synchros will show up on ebay.

Strange that you would post today as we started rebuilding or as near as we can get to rebuilding an M410 today.

We are changing the following new parts for the 4 speed section:

Front and rear mainshaft bearings
Caged needle bearing inside input shaft
Front and rear cluster shaft bearings
All gaskets and seals

Additional new parts that are available if needed:

Long and short shift dogs
Shift dog springs.
Reverse light switch

FYI, the front bellhousing gasket and the front seal retainer gasket were discontinued by Volvo, but I had copies professionally made with the correct thickness gasket paper. These are NOT traced and hand cut copies.

Fortunately the current M410 transmission did not need synchros as they were in very good condition, just noisy mainshaft bearings.

If needed I do have some good used synchros.
--
Eric
Hi Performance Automotive Service (formerly OVO or Old Volvos Only)
Torrance, CA 90502
hiperformanceautoservice.com or oldvolvosonly.com