After draining the gear oil is it best to flush with parts cleaner before replacing with fresh oil?
Not typically necessary or recommended. You seem to be repeating yourself. Posting the same thread in multiple places is frowned upon. Apparently you have a 348 and are doing maintenance. There are numerous threads devoted to this including a few that are recent. Please complete your profile so we know a bit more about you and where you are.
Respectfully 2NA I am new to the site and hope not to offend anyone by asking a question. I have reviewed earlier post regarding this topic and found in the post a recommendation to flush the system. In following post I noticed there was no negative feedback regarding that suggestion. This was the reason I placed this post. As you suggest I will update my info so maybe you or others wont feel that I am wasting their time. I purchased this 1991 348TS in December and going through it prior to Spring here in Washington State. Two new radiators LH&RH, hoses, fuel filters as well as oil change and gear oil change. First Ferrari and thank all for their help. And the mileage on this 348 is 21800. As most who love their car I care to do the work but as anything it is a learning process you read you study and most you compare suggestions and opinions and thats why I have found this site a great asset. Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login
Nice looking car, I especially like the wheels. The 348 is a great car and you'll meet many of us here who have one. Plenty of DIY information from "The Brotherhood".
I would never use a solvent. If it doesn't all come out it will be in there with your fresh fluid. As was said, if fluids are changed often enough it is never needed. If you felt a reason to flush the system I would use the recommended fluid, drive it 50 miles, drain and then refill. I do recall I had a car built in 1969 that suggested flushing the engine by using 10 wt oil. Filling to proper capacity, running for 5 minutes and draining. I'd never do that myself as I change my fluids often enough.
That is "old school" that dates from before detergent oil was invented. Non-detergent oil formed sludge. Modern oils keep many contaminants in suspension to be trapped by a filter or drained out.
If your set on "flushing" I would flush with the same fluid your going to replace with. And I would flush after running the crap out of the car.
