3rd gear slip

[loganjj27]

i have a 2005 6.0 with 150,000. every once and a while 3rd gear seems to be hesitant. 3rd gear is the only gear its ever done it in and it will only do it about 25%ish throttle. it seemed to do it worse than normal last time i drove it but maybe just imagination. What could it be?

[Steve6L]

be more specific to get better help, when it ****s into 3rd? while its in third? while it shifts out of third? are you sure its third and not the common 3rd to 5th shift flare? by hesitant what do you mean? very vague question need more info to help you

[loganjj27]

It slips going from 2nd to 3rd and it delays on shifting and rev up just a hair.

[loganjj27]

Anybody

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[tbwarren]

Sounds like your clutch plates are going bad.

[NMB2]

Originally Posted by tbwarren

Sounds like your clutch plates are going bad.

x2..........

[loganjj27]

Well i was thinking the same thing but when i haul my lawn tailor once a week that's about 4500 pounds it isn't any worse or happen any more often then when unloaded. I figured if it was clutches it would be worse with load. And i don't use tow haul

[tbwarren]

Originally Posted by loganjj27

Well i was thinking the same thing but when i haul my lawn tailor once a week that's about 4500 pounds it isn't any worse or happen any more often then when unloaded. I figured if it was clutches it would be worse with load. And i don't use tow haul

ok, I'm going to try to explain this to you to the best of my ability and as simple as possible. (I'll supply pictures for you when I get home of a burnt up clutch plate and what one should look like in good working condition). So basically you need clutch plates to cause the friction to help put the power to your wheels (basically, and simply put, there's obviously more involved to it). but anyway your clutch plates have grooves in them and when they wear out your truck will start to slip when trying to go to the next gear because it can't keep continuous friction. And they are most likely warped too (from too much heat, possibly caused from the slippage). So when you tow, its not going to be any worse then when you don't(unless your trans temp is getting hot (from a heavy. heavy load) then it will be breaking down your trans even more as you drive). AND It will continuously get worse though as you continue to put miles on it because it is already damaged and will continue to damage it's self. Simply put your trans is slowly killing its self. (and of course this is my thoughts, based on how you described your problems) Now I could be wrong , I haven't drove you truck so I can't say for sure- could be something else, but most likely clutch plates.

Now comes the true question.... why are your clutch plates worn out? High miles (not your fault, stuff gets worn out). Do you let your trans get too hot when towing? (might want to invest in trans temp gauge). Do you have a crappy tuner that smokes the trans (guy I bought my truck from did, now I'm replacing it...)

So anyway those are my thoughts, hope it kind of helps (and I might have explained the whole clutch plate thing wrong by trying to simplify it).

[Karls03]

It could be a sticky solenoid or two in the "valve body", there are only 7 of them. However, they are NOT labelled 1st, 2nd, etc because more than one can be used to engage a gear. I did mucho research when my 5R110 was going south.one thing I found out, when the clutches are going, the computer slam shifts into 5th and 6th gears. (5R110s shift 1-2-3-5-6 but that's a whole nother thread). A GOOD code reader would help.

Swapping solenoids is mucho easiero than swapping transmissions. I bought a rebuilt valve body from a shop in Fla off eBay for $250. Thus leaving me with a servicable valve body because I had different symptoms than what have been mentioned here.

sent from a dumb guy with a smart phone

[DoubleDpsd]

Time for a new trans and tc and trans cooler. Tousley has trans coolers for $280

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