I'm trying to remove 4 bolts (15mm) that hold the front of the driveshaft to the transmission. However, the yoke is so wide that I can't fit a socket, flare nut wrench, or ratcheting wrench. At best, I can get a socket on, but it won't align properly and is starting to round off a bolt head.

This photo is similar to my situation,

http://www.merkurtech.com/merkurtech...t5shaft004.jpg

In the photo, the target nut/bolt is in the 2 O'clock position, the protruding yoke is in the 4 O'clock position. However, this photo doesn't show how the yoke is so wide that it blocks the tools I tried.

The thickness of the tool at the 15mm end must be less than 10mm, because my 10mm flare nut and ratcheting wrenches won't fit in at all.

An open-end wrench fits, but I need one with 4 contact sides, because those driveshaft bolts were installed in 1988 at 37 ft-lbs and I don't want to round the heads off (already beginning, so I'm taking a break and asking for help.

This Capri tool has only two contact surfaces, so I don't think it would be okay to use:

https://capritools.com/product-categ...nd-wrench-set/