As the owner of a 95 diesel, one other thing to check is that the intercooler fan is working. It is poorly designed and when I bought the vehicle I found that it was seized up solid.<BR>The temp gauge on mine never wavers from normal even when in low range all day crossing sand dunes.<BR>Back to thermostats - my belief is that the thermostat only serves to warm the engine up quickly and does not affect the running temp once warmed up. Thus putting in a thermostat with a different temp will only serve to lengthen or shorten the warm up period.<BR>Darryl