Its bone stock, aside from having a set of 31's on it. No lights on dashboard, and OBDII reader doesn't show any incomplete monitors. Only issue with the trans is that when I'm starting out cold, it will not want to shift out of 1st gear for the first 2-3 minutes of driving. It will upshift, but only after the RPM is significantly higher than the normal shift point. After those first few minutes it shifts perfectly through all gears, including OD. If anything I feel like it could downshift a little sooner, but its nothing out of the ordinary.
Temp needle sits right in the middle of the range when warm.
I've never driven another Montero to compare the power with, but honestly it seems a little less powerful than I'd have expected. My other car is a 1969 Baja Bug (stock single port 1600) so like...kinda apples and oranges, but on this one long sweeping grade near my house I can keep the bug at like 47mpg in 3rd with the pedal pretty far down. On the same grade, the Montero could only hold about 57 with O/D off and the pedal pretty close to floored. In normal conditions though the power feels...adequate to me?
Unfortunately maintenance is a bit of an unknown - PO said it had all been kept up on but he didn't have the paperwork. I'm at a point in my life where a few extra bucks is worth piece of mind, so I bought OEM timing belt, water pump, pulleys and tensioner, spark plugs, associated gaskets, and will be ordering a crank pulley bolt soon. Hopefully I'll have a free weekend sometime this month to throw it all in. Guess I should find an updated lower intake manifold while I'm at it.
I haven't been babying it, but haven't been flooring it either. Just my normal driving style. I've never been wowed by the results of seafoam and the likes, but maybe ill give that a shot?