Hot Exhaust On Differential

For anyone that has not seen my current thread on the driveshaft issue, we hit some road debris that tore off the exhaust tailpipe and did major damage to the drive shaft. After 4 days the driveshaft has been replaced and we drove over 200 miles today and so far, no issues. However, the tailpipe is still gone since the repair shop does not do exhaust work. We still have another 600 miles to go and no place to fix the exhaust so we need to drive it without the tailpipe. With the tailpipe gone the exhaust is pointing at the differential about 3 feet in front of it. So I'm wondering if there might be a problem with hot exhaust blowing at the differential even at 3 feet away? For those that might be concerned, there is no exhaust coming in the coach. Chuck