I imported my first Landcruiser, a diesel 83 BJ60, a few years ago. It's held up pretty well, needs a little frame work, engine's strong. A few weeks ago, I started being unable to shift into first or second, fourth or fifth, in the span of a day. My mechanic doesn't really know diesel Landcruisers, but says he thinks it's the transmission. Does this make sense to all the experienced LC owners out there? I have a quote of a thousand for a used H55 transmission, which, I'd hate to spend if this isn't the problem...any advice would be much appreciated.