F350 Trans service
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Fleet Mechanic
Joined: Mar 2006
Posts: 1,519
Likes: 134
F350 Trans service
Wanted to change all my fluids in my recently purchased 2008 F350. Got all the fluids for the Front and Rear diff, T-Case and Trans + filter. I think I can do all of it but I am a bit iffy on the trans. I watched a few videos and it looks pretty straight forward.
Anyone have any advice or should I just go a place to have it drained and refilled.
Also if I do it was reading the correct way to do it is drain the trans, and add two quarts, go for a ride, drain again, two quarts, ride. Do that four or so times and drop the pan on the last one to change the filter. What do you guys recommend? I bought 8 qts. of trans fluid but can always get more. Any my model doesn't have an external filter, just internal.
Thanks in advance
Matt
Anyone have any advice or should I just go a place to have it drained and refilled.
Also if I do it was reading the correct way to do it is drain the trans, and add two quarts, go for a ride, drain again, two quarts, ride. Do that four or so times and drop the pan on the last one to change the filter. What do you guys recommend? I bought 8 qts. of trans fluid but can always get more. Any my model doesn't have an external filter, just internal.
Thanks in advance
Matt
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,723
Likes: 2,648
From: SE Florida
I think that draining the pan, adding two quarts and driving it will destroy your trans. If you drain the pan you'll get about 8-9 quarts out. Adding two quarts will leave it grossly underfilled.
If you want to use this method replace the same amount that comes out, which will be 8-9 quarts.
If you want to use this method replace the same amount that comes out, which will be 8-9 quarts.
Hotshot
Joined: Jul 2013
Posts: 14,266
Likes: 2,187
I did mine as a drain an refill. I plan to do the tranny at very eng oil change. but be advised, it would take 17 drain and refills to actually replace all the used tranny fluid with new tranny fluid.
If I had a trust in a service center, I would probally let them do the hot flush.
But I dont have trust any more after replacing 2 transmissions on different vehicles after they were flushed with the service center claiming not related to the work done.
I even caught a service center pouring Mercon III in my Expidition tranny and claiming they had an additive that brought the Mercon III to Mercon V service levels. Made them drain it and pour the correct fluid in.
I also had a case of fluid being extracted, filtered, and poured back in. The claim was they filter and conditioner it and it was a s good if not better than new fluid. watch out for that kind of stuff.
If I had a trust in a service center, I would probally let them do the hot flush.
But I dont have trust any more after replacing 2 transmissions on different vehicles after they were flushed with the service center claiming not related to the work done.
I even caught a service center pouring Mercon III in my Expidition tranny and claiming they had an additive that brought the Mercon III to Mercon V service levels. Made them drain it and pour the correct fluid in.
I also had a case of fluid being extracted, filtered, and poured back in. The claim was they filter and conditioner it and it was a s good if not better than new fluid. watch out for that kind of stuff.
Fleet Mechanic
Joined: Nov 2011
Posts: 1,825
Likes: 43
From: Land of Taxes
What Mark said and;
Look here;
https://www.ford-trucks.com/forums/1...=droldsmorland
And here;
https://www.ford-trucks.com/forums/1...=droldsmorland
And here;
https://www.ford-trucks.com/forums/1...=droldsmorland
Look here;
https://www.ford-trucks.com/forums/1...=droldsmorland
And here;
https://www.ford-trucks.com/forums/1...=droldsmorland
And here;
https://www.ford-trucks.com/forums/1...=droldsmorland
Fleet Mechanic
Joined: Nov 2011
Posts: 1,825
Likes: 43
From: Land of Taxes
Drain and refill. Cheap insurance. I just did my new to me rig with 38K. Filter and 20qts. The filter was ready. The fluid was nice but I did it anyway using the fill, drive, drain then refill method. I will likely do it again in the spring (I'm ****). The Motorcraft filter is 25-30ish. The LV is 70ish a case x 2. Clean off the pan magnet. Dont drop it or it could shatter.
Yes the gaskets reusable if its in good shape. Take it off gently. Drop the pan gently. Its metal with rubber bonded to both sides so don't bend it. The metal is not continuous its more like 4 pieces so it will flop around somewhat. You don't need any RTV. The gaskets about 30-35ish. The torque on the pan bolts is inch pounds. If I was a guessing man I say 80-100 lb/in max...(6-10 ft/lb max).
Use a 1/4" drive ratchet and snug them all down then just keep running around the rail until you feel they are tight. You should not tighten to the point where you distort the pan or squeeze the rubber gasket material out. That's too tight. Check for leaks after a road test...simple as that. Spray the used trans fluid on your chassis and bed rails and inner fenders etc...
Yes the gaskets reusable if its in good shape. Take it off gently. Drop the pan gently. Its metal with rubber bonded to both sides so don't bend it. The metal is not continuous its more like 4 pieces so it will flop around somewhat. You don't need any RTV. The gaskets about 30-35ish. The torque on the pan bolts is inch pounds. If I was a guessing man I say 80-100 lb/in max...(6-10 ft/lb max).
Use a 1/4" drive ratchet and snug them all down then just keep running around the rail until you feel they are tight. You should not tighten to the point where you distort the pan or squeeze the rubber gasket material out. That's too tight. Check for leaks after a road test...simple as that. Spray the used trans fluid on your chassis and bed rails and inner fenders etc...
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Thread Starter
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Fleet Mechanic
Joined: Mar 2006
Posts: 1,519
Likes: 134
Called my trans guy. To do a hot flush he would need to fill the machine with about 5 gallons and it will just recirculate what is coming out which he doenst use all that much.
He told me his process is to:
- drop the pan
- new filter
- pan back on
-fill up the trans pan with the return line off which will fill the trans.
He told me get him 20 qts and a filter and he will get all new fluid inside the trans.
Sound right ??
He told me his process is to:
- drop the pan
- new filter
- pan back on
-fill up the trans pan with the return line off which will fill the trans.
He told me get him 20 qts and a filter and he will get all new fluid inside the trans.
Sound right ??
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Thread Starter
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Fleet Mechanic
Joined: Mar 2006
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He owns a well known trans shop and he's a buddy of mine . Let me call him again and talk to him.
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