Did it get hot enough to melt the speedometer cable that attaches to the t/case? What about the wires on the 4WD shift light indicator, are they melted also?
If so, then I would remove a flange and inspect the seals. Possibly, checking for hardness wouldn't be sufficient since old seals harden with time. But instead, check for charcoalled appearance of burn or intense heat contact. Also, if you can, separate the t/case from the transmission. What does the gasket inbetween the two look like? If it is burned then expect the t/case gaskets to be burned as well. If it's not, then it may not have gotten hot enough down there.
If it did hot enough to burn gaskets and melt seals, then you might have a possibility of oil being 'baked' onto metal components. That's not good, especially in bearing races.
So, with the above in mind, we do sell a complete t/case overhall kit for $125 that includes all gaskets, seals, bearings--all Nachi (genuine toyota), and 2 new flange nuts. However, we have never ever sold one. The bearings just don't go bad, so we usually sell a gasket/seal only overhall kit. I think it would be priced around $30 bucks. Give us a call! 8)
Regards,
BigMike
