Just bought a 92 F-350 Sat. It has 57K on it. The Trans, fluid dosent look bad But would you change it if it were yours? The Dealer wasent sure if it it had ever been changed. I thank i will change it & New Filter. Now my next question is what should i use back in it? Reg, Ford Fluid or should i go Synthetic?

 

I tow a lot so I use synthetic to try and keep the temps down. Mobile 1, about $6.25 at AZ.

 

Thanks, I forgot to ask. How many Quarts does it hold? Gowing with Mobil-1 or Ames Oil, Are there diffrent Wts, or Grades i need to look for? Thanks

 

I just changed mine last week. The torque converter has a plug, so you can drain the entire transmission. Don't forget to drain the cooler and its lines as well. It needs 16.5 quarts to fill it up, but don't put all of that in at once. I recommend putting in 15 quarts and then topping it off.

You'll want to use the Mercron III or its synthetic equivalent. Also, there's a magnet in the bottom of the pan that needs to be cleaned.

 

Change the fluid in the E4OD often. (I would recommned every 30-40k)

The E4OD is different than the old C6. On the C6 the tranny would run straight thru most of its life (i.e. input shaft speed is output shaft speed)

The tranny oil in the C6 basically lubricates a few bearings for the most part.

The old thinking was you never change oil on an automatic for the life of the vehicle. You can not apply this kind of thinking to the newer automatics with overdrives as the oil has to work so much harder in these trannies and sooner than later will break down. Also the coolers on the first generation E4OD's were undersized which caused the oil to heat up and break down faster.

The E4OD runs most of its life in OD which is a lot harder on the oil as the tranny generates a lot more heat. There is also a lot more shifting going on (due to more gears) and factory design on the E4OD is soft shift which again is very hard on the oil as clutches slip a little to give you the soft shift feel.

Oil Capacity is about 16 quarts (if you still have a torque converter that has a drain plug to drain it) Many of the newer aftermarket torque converters no longer have a drain plug so you will only need about 12 quarts. This is another reason to do your oil changes every 30k as you only replace about 75% of the oil during an oil change.

Personnally, I would stay away from the foam flush that is being offered by some of the tranny places. You could do more damage than good with that kind of flush unless it is done properly and timely.

My Dads 92 E4OD started spitting out all kinds of tranny codes the other day. All it took to get it back was an oil change which he had not done in over 60k. You could not tell the color of the oil he was using anymore.

Use Mercon III. I have opted to go for shot of Duralube tranny additive on my 91' E4OD instead of going synthetic.

I think the key to keeping you E4OD happy is to do oil changes often. Don't use Synthetic oils to extend your oil change intervals as the oil builts up fine metals over time.

Make sure you clean the magnet. After 30k it will usually be covered with about 1/8" to 1/4" layer of fine metal which is normal as the clutches and torque converter lock all slip and wear a little to give you the soft shift.


Seb....