Thor Forums

[Pete'sMH]

Originally Posted by jabrabu

On a related question, what about the transmission and rear differential?

For the newer 6-speed trans the owner's manual says change it at 150K miles. But the schedule for towing a trailer says every 30K miles. Mine is at 60K and the fluid still looks clean.
For the rear end, the regular maintenance schedule says change the fluid at 97,500 miles. The towing schedule says every 22,500 miles.


I'm planning to do a long trip this summer, about 6500 miles in the July/August heat towing a CR-V. I will change the trans and rear axle fluids before that trip. I was just wondering how often the rest of you change the trans and rear axle fluids.

Good questions. I’d follow the recommendations for towing even if I never towed. Most of our coaches operate pretty near their GVWR if not their GCWR. As with engine oil the service is a lot cheaper than the failure. I’d considered the question of when to do it but hadn’t gotten around to looking up an answer because my 2019 only has about 9200 (COVID limited!) miles.