Rear end oil

[kneival]

I have a 2012 Thor Tuscany 45LT. What weight oil does the rear end use? I cannot find it in my owners manual.

[simidrm]

My 40ft Tuscany diesel pusher uses 75w80

[lwmcguire]

If you're changing it, i would go back with synthetic

[Sappy2]

I agree with lwmcguire, go synthetic and you will be all set for a very long time. Worth the extra bucks.

[simidrm]

75w80 is a synthetic lube and the 80/90 is conventional

[lwmcguire]

I use the 75-90 in some and used 75-140 in my F550's

F550 had the cooling fins but still ran hot when towing heavy loads

Tuscany differential runs cool

Use your temp gun on a hot day and see how your profile looks

I use mine to check tires and brakes when crossing the passes