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Old 11-03-2013, 04:31 PM
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5r110w Problems

I was going down the road just minding my own business about 70 mph. My truck starts making a loud squealing noise. I pulled over at the next exit to investigate. What it was doing then was a ratcheting noise while coasting about 5 mph down to zero. Then started to long delay going into gear. At stop lights it would go into neutral or sometimes act like it was in 4th or something. I did manage to get the 70 miles home, on egg shells I might add. Sometimes it would slip some going down the road only if I leaned on it too hard. Like the converter was slipping. Only a 100 RPMs or so

Today I tore into the tranny and found that the low reverse clutch was completely smoked. I mean completely. The diode was fine. All of the rest of the transmission was in excellent condition.

I baby my truck and tow very little and then less than 10000 lbs. The fluid looked pretty good despite the catastrophe. The only thing leading up to this was a day or two of delayed shifts into 4th gear, I think. This was very subtle but I noticed it. The fluid was at the proper level.

What might be the cause? It is a 5R110W behind 6.0 2003.

I'm stuck and I am afraid to rebuild it even though I believe I am capable. I don't want to overlook a lube issue in the transmission.


Thanks,

Brian
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Old 11-03-2013, 06:12 PM
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Quote:
Originally Posted by greenacres36 View Post
I was going down the road just minding my own business about 70 mph. My truck starts making a loud squealing noise. I pulled over at the next exit to investigate. What it was doing then was a ratcheting noise while coasting about 5 mph down to zero. Then started to long delay going into gear. At stop lights it would go into neutral or sometimes act like it was in 4th or something. I did manage to get the 70 miles home, on egg shells I might add. Sometimes it would slip some going down the road only if I leaned on it too hard. Like the converter was slipping. Only a 100 RPMs or so

Today I tore into the tranny and found that the low reverse clutch was completely smoked. I mean completely. The diode was fine. All of the rest of the transmission was in excellent condition.

I baby my truck and tow very little and then less than 10000 lbs. The fluid looked pretty good despite the catastrophe. The only thing leading up to this was a day or two of delayed shifts into 4th gear, I think. This was very subtle but I noticed it. The fluid was at the proper level.

What might be the cause? It is a 5R110W behind 6.0 2003.

I'm stuck and I am afraid to rebuild it even though I believe I am capable. I don't want to overlook a lube issue in the transmission.


Thanks,

Brian
Are you running a tuner or using a custom tune? Some tunes are known to be tranny killers.
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Old 11-03-2013, 06:23 PM
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I'm not using a tuner or any other power mods. I have owned the truck for about 20000 miles. It has 142000 now. It is completely stock.
I tend to wonder if someone has put some incorrect ATF in it at some time. It was bright red and new looking before this incident. Something must have made the low / reverse clutch try to grab. I am guessing.

Brian
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