Transmission oil change due to time?
I'm buying an Alfa with a C7 and an Allison 3000. The tranny had an oil change 4 years and 25k miles ago. Do you change the trans fluid due to time?
Forum Discussion
JimR 1 wrote:twodownzero wrote:
If the trans pan has a drain plug, I would drain and refill the pan every time you change the oil.
There is no reason to do that and it would be very costly. Allison has a maintenance and change schedule and that is what should be used. My changes are based on time and not milage and at a cost of 310 for parts and about and hour of labor that is a cost of about $435.00 parts and labor.
Jim
If you think spending $435 at every factory interval is superior to spending $50 every oil change, I wouldn't argue against that.
I also never change fluids due to time and not mileage. My experience with oil analysis has shown that running the fluids way past the time interval has shown no adverse amount of wear and it would be a complete waste of oils to change them after a year when the oil is still protecting the engine.
I am not suggesting that you should second guess the engineers who designed the product, but if you have data to back up why you'd do that as I do, you may think it's cost effective to do as I do.
Ram also recommends no service of diffs ever on my truck for standard service and 15k mile intervals for severe service; there's a long way to split the difference between those two.
