1999 Honda CRV with 228k miles. Honda Real Time 4WD. Have no records of diff fluid ever being changed. Was told by a mechanic that it could cause damage by changing it at this point, similar to brown, metallic ATF that would cause all kinds of problems if changed. I have never heard of this in differentials like in ATs. Is this true?
If it's fine to change, are there any alternatives to the recommended Honda Genuine Dual Pump II Differential Fluid? What is different in it from GL-5 fluids?
If it's fine to change, are there any alternatives to the recommended Honda Genuine Dual Pump II Differential Fluid? What is different in it from GL-5 fluids?