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I believe the service interval is 30k miles. I am at almost 40k and the fluid looks brand new. Keep in mind this is the first service after a rebuild.
You think I can wait a bit or should I do it ASAP because I'm 10k over due.
Also, anyone know where to get Mercon V in anything but quarts? A 5 gal bucket would be wonderful. I just don't want to be "that guy" who buys 20 quarts of ATF at the parts store.
Cheap insurance. Change it and the filter. Trans fluid breaks down even when it looks good and pink. The only other way to extend oil/fluid change intervals is to have an oil analysis performed. That will tell you exactly what condition the fluids in. But the cost of that is most likely about the same as a service if performed DYI vs a shop? Not sure what an analysis would cost for a single sample for an off the street customer verses a fleet customer.
Be sure to use the correct type fluid.
I would not wait on it even though the fluid looks good. Your gut feeling helped create this post so if it were me I would go with that and get it done. The shop that did the rebuild sounds like the perfect place to get it done at and you can always ask how do they inspect that fluid and look for issues. I have not had this done yet on the 96 since its rebuild but its getting time in years not miles so I will be doing this soon myself. Allowing the same shop that performed the maintenance to do this gives you a foot up in the unlikely event that a issue occurs.
Asking how they maintain thier systems and how they do the whole flush will also put them on a higher since of duty when yours is in there. Most especially if your there. So I would press on with the change. Even if it was just for ease of mind.
mobil synthetic exceeds the requrements for merc V. so if you find it, you can use it.
sometimes it is labed as merc/dexIII, sometimes it just says ATF, but either way it can be used.
castrol synthetic amd valvoline synpower, both labled as merc/dexIII also exceeds the requrements for merc V, so they can be used as well.
wouldn't hurt to double check their webpages in case something has changed, but i can't immagine that they have made them "worse"
i HIGHLY recommend synthetic trans fluid. any vehicle i have had flushed gets synthetic. my 95 t-bird had the classic TC shutter, and a synthetic fluic exchanged cured it .... HIGHLY recommend.
X2 on the Shaeffer oil products. I used Mercon LV which is the up-dated version of the Mercon SP. Drop the pan and put in the $60-70 filter. you can reuse the gasket. Why mess with not changing the filter, its cheap insurance. Clean off the magnet in the pan too. I purchased 20 qts and Did the filter and 9ish qts. Drove it for a day then pulled the plug, drained about 9 qts out . Refilled again with fresh. While I was at it I replaced the direct clutch solenoid with a high perf one from Holder-down performance while the pan was off.
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