Couple reasons to explain Chris' statement.
1. Screens in the cooler lines in the radiator tend to get blocked and stop or limit flow.
-Screens were removed in later model and replacement radiators
2. Internal filters clog and impede flow and line pressure.
- Needs to be replaced or cleaned ever 50,000 miles
3. Lack of proper oiling to the high clutch causes wear and heat.
- Cases were modified along with shaft seals to reduce this problem
4. Low gear ratio reduces oil pump revolutions, with low line pressure due to a leaking(internally) pump gasket can cause excess heat.
- New oil pump gaskets were designed to reduce failures and maintain proper line pressure.
these were the problems and fixes, BUT it still suffers from heat due to power/weight ratio against a very low FD and 4th gear ratio. SO if it is a 92, replace the radiator, add an inline filter and cooler and hope for the best
Also change out the internal filter and run a good synthetic ATF.
Tom