goprolocal wrote:
UPDATE:
The shop has had the rig for 6 weeks or so. I've been back 2x to test drive it after they said they had it fixed.
Here's what they did.
Replaced the radiator hoses, replaced the clutch fan, flushed the block and radiator, replaced the thermostat (for the 3rd time in 6 months).
At this point, I drive the rig for 15 minutes down the highway at 65mph. With the overdrive off (to simulate engine rpms while towing) it runs at 220-230 degrees for 12-14 minutes...then in the next 2 minute period, the temp guage clicks ..jumping 10 degrees at a time...in 2 minutes, I'm at 255 degrees. When I turn the overdrive on again, it cools to 245 or so.
Everything I can think of has been checked on the motor...could this be the transmission? The rig sat for a long time before we bought it...in cold temperatures. Could this have something to do with it?
I'm reaching out to a transmission shop next. ugh.
I did not see where the sending unit has been replaced or tested with another gauge and sending unit.
I had a car with temp problems and it was corrosion at the sending unit causing a bad ground and bad reading.