99 F250 2WD Trans problem/questions - Ford Powerstroke Diesel Forum
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post #1 of 3 Old 07-09-2014, 01:31 PM Thread Starter
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Exclamation 99 F250 2WD Trans problem/questions

Hello all,

Hoping someone might be able to drive me in the right direction here.

The past weekend I had to go down a very steep switchback grade. I was using the transmission and engine brake to keep my speed down. Towing approx 11k lbs toyhauler and a Polaris RZR in the bed. Once the transmission hit 230 degree's I put it into neutral and started mainly using my brakes. The transmission cooled right down (I have a very large trans cooler) to 190 but my brakes were heating up. Was doing about 40mph and I went to shift it into drive but missed and went directly into second.

There was a very loud bang.. Felt like we hit a wall, it was crazy. As soon as that happened a loud noise started up. Hard to describe. Like a Rattle and a Slap together. Thankfully I was only a half mile from the campground and it was downhill. Once I arrived there I moved the trailer and setup camp, didn't hear the noise. While moving around the campground.

I didn't really have much choice on the way home so I hooked up and started climbing the hill. First and second all the way and no noise. Didn't seem to have as much pull as I thought originally though. Once I was at the top however and on more level ground I got into 3rd and 4th and boy did that noise come back. It did however start to go away after 50 miles or so. Essentially I had to travel 500 miles back home. After that initial 50 miles the sound only occasionally occurred for short bursts. Pulling hills didn't feel the same though, but it did make it home.

I've crawled under there and done a cursory look for anything that came loose but did not see anything. I have to assume the rattle/slap is coming from the transmission. But, it's still moving for now.

Thoughts and suggestions?

Thanks!

~Ryan
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post #2 of 3 Old 07-10-2014, 08:01 PM Thread Starter
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Hello all,

Still hoping there are suggestions for what I can/should do. today I did some test driving with the truck unloaded. The original slap/rattle sound was gone. I couldnt get it to do it any more. But I have noticed that reverse feels really funny now. Almost a shudder at times when going in reverse. Also, I smelled the fluid and it smells pretty burnt.

Would doing what I described above blow out the reverse in some way?
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post #3 of 3 Old 07-10-2014, 10:23 PM
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Reverse is the first to go when you start losing line pressure. You could try changing your fluid and pull the pan to look for shavings. If there are no shavings you could try just changing the valve body to see if that makes it better.
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