Th350 has started shifting high rpm, and downshifting whenever it gets the chance, but only once it gets at full operating temp.... not related to kickdown cable. Ill start looking for vacuum leaks, what do you guys suggest?
CK5
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Th350 shifts very high when hot
- Thread starter fordsucks!
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wasted wages
1 ton status
pop off the governor cover and pull it out... make sure all of the teeth are in good shape and the flyweights move freely... look inside the hole and inspect the drive gear on the output shaft as well .
Thank you for the advice, I didn't pull out the governor gear but now I know about it.
I did however, find a cracked and loose vacuum line from the converter lockup to the carburetor. Holy hell, my transmission has never shifted better!
I did however, find a cracked and loose vacuum line from the converter lockup to the carburetor. Holy hell, my transmission has never shifted better!
wasted wages
1 ton status
yeah, that was a " just for information" thing in case you didn't find anything wrong with the vacuum lines or modulator... they also make adjustable modulators if you need to fine tune your shift points.. not very expensive.
Thanks. I may eventually look into the adjustable. Right now I'm just glad that it shifts like a brand new car. Here I thought it was a high RPM, 3rd gear problem. I didn't realize how bad all my shifts were
Was the hose cracked or soft and swollen so big it fell off the modulator on the side of the transmission?
Cracked is usually just old rubber, but swollen is a leaking modulator that is letting transmission fluid get into the hose. Not uncommon.
Cracked is usually just old rubber, but swollen is a leaking modulator that is letting transmission fluid get into the hose. Not uncommon.
Thank you for mentioning this. You are right, the hose was soaked in oil and loose. I put a new hose 2 days ago, right now I just popped it off and it dripped trans fluid.
Yep seen that lots of times. One friend of mine was on his 5th or 6th repair when the transmission started acting funny. He said, Darn it, that darn hose has fallen off the transmission again. He said he had cut the end off a couple of times until it got too short, and he said that he had replaced the hose twice.
He had on some good clothes, and asked me if I would slide under and cut the bad end off. Said he had left plenty of slack so he would not have to buy a new hose for a while.
We were not far from town, so I told him to just go ahead and go to the parts house.
I went in, bought a new modulator. Slid under right in the parking lot and changed it.
Just for fun, I didn't tell him what I had done. Just told him I had replaced the hose again.
Several months later, we were driving through the woods hunting, and he suddenly snapped his fingers. Said, I have been meaning to tell you, whatever type of hose you put on the transmission last time worked great. I have not had to fix it since.
I just smiled.
Sometime later, I got a call from him. He said that he was in the local dealer talking to one of the mechanics he knew, and another one came up with a piece of swollen hose. My friend saw it, and said be sure and put the type hose Fordum put on mine. It never swelled again.
They walked outside, the mechanic slid under, and told him I had not replaced the hose, I had replaced the modulator because it was leaking and causing the swelled hose. He could see the modulator was fairly new.
He wanted to know why I had not said something. I said it was too much fun to let him think he had been using the wrong type hose.
BTW, after you replace the modulator, be sure to check the fluid level in the tranny. That fluid was not stopping at the end of the hose, it was being sucked up into the carb and burned. Usually the leak is small enough that it does not take all that much out of the transmission, but some times the leak is larger than others. You usually start seeing smoke if its that large though.
He had on some good clothes, and asked me if I would slide under and cut the bad end off. Said he had left plenty of slack so he would not have to buy a new hose for a while.
We were not far from town, so I told him to just go ahead and go to the parts house.
I went in, bought a new modulator. Slid under right in the parking lot and changed it.
Just for fun, I didn't tell him what I had done. Just told him I had replaced the hose again.
Several months later, we were driving through the woods hunting, and he suddenly snapped his fingers. Said, I have been meaning to tell you, whatever type of hose you put on the transmission last time worked great. I have not had to fix it since.
I just smiled.
Sometime later, I got a call from him. He said that he was in the local dealer talking to one of the mechanics he knew, and another one came up with a piece of swollen hose. My friend saw it, and said be sure and put the type hose Fordum put on mine. It never swelled again.
They walked outside, the mechanic slid under, and told him I had not replaced the hose, I had replaced the modulator because it was leaking and causing the swelled hose. He could see the modulator was fairly new.
He wanted to know why I had not said something. I said it was too much fun to let him think he had been using the wrong type hose.
BTW, after you replace the modulator, be sure to check the fluid level in the tranny. That fluid was not stopping at the end of the hose, it was being sucked up into the carb and burned. Usually the leak is small enough that it does not take all that much out of the transmission, but some times the leak is larger than others. You usually start seeing smoke if its that large though.
I went and bought a $30 modulator, I thought it was stock replacement but turns out it's adjustable
I'm not really looking to adjust my shift points, what do you think of the adjustable modulators
I'm not really looking to adjust my shift points, what do you think of the adjustable modulators
In my experience the adjustment isn't that wide,you can adjust it to shift softer and earlier,or later and firmer,but the difference is only about 5 mph or so and the shift firmness doesn't really change all that much--not compared to a shift kit anyways..
I've used adjustable modulators before and I adjusted them to shift later and firmer,the higher line pressure wont hurt,and prevent the clutches from wearing out sooner..
I've used adjustable modulators before and I adjusted them to shift later and firmer,the higher line pressure wont hurt,and prevent the clutches from wearing out sooner..
