[v8volvo]

Jason, from what I understand the M90 would be a bolt-in to your car (that is, if you could find one off a D24T from Europe, rare...)

We never got the M90 in anything in the US; our diesels were always available with manual but only with the M46. The M90 is a beast of a tranny, can hold massive amounts of power and is geared well, but was only ever sold elsewhere, in 940s and 960s.

The M46 is stronger than the M47, though behind a diesel either one should be plenty strong enough. The later M47s are better but early M47s break easily. If you can find a late (Series II) M47, bolt up a D24T bellhousing and get the input shaft sleeve off a D24 or D24T M46 to make it fit the pilot bearing ID correctly, you would have a nice setup, and lighter than the M46 which has the overdrive unit hanging off the back. However, my understanding is that the second gen M47 was only offered in 240s, so you might have a speedo cable hole to plug up (700 series cars read speed off the diff while 200s use a cable off the trans tailshaft), and finding a correct driveshaft to fit the M47 into a 700 body would be tricky since they were very rare (only in non-turbo 8v gas 740s for a couple years in the late 80s-early 90s, and sold in very small numbers). Probably the easiest and safest bet is to just try to find a complete package with M46 and driveshaft from a D24T 700 car.