Serpentine adjust?
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From: Houston, tx
Serpentine adjust?
Was told to repost here....
When I accelerate hard, my truck screeches a bit on the 1-2 shift. (From the superchip). Where/how do I adjust the serp. belt to eliminate this (assuming this is indeed the problem).
Thanks,
Ken
When I accelerate hard, my truck screeches a bit on the 1-2 shift. (From the superchip). Where/how do I adjust the serp. belt to eliminate this (assuming this is indeed the problem).
Thanks,
Ken
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From: Kemah, TX
Been waiting for a solution to the problem also.
The new screetching is due to the Superchip's increased torque and faster shifting. I says in the manual, it's (the tensioner) non-adjustable. It's spring loaded. So it's always tensioning the belt. So it should never get loose. The factory didn't take in account the quick shift characteristics of the Superchip. It does suck. But I just try to ignore it. There is a thread somewhere where Mike actually replies. Forgot what he said. But a couple of the solutions was to spray belt dressing or just buy a new belt. But I just bought a new belt, and it still made the noise (actually got worse after new belt??). There was one more, and it was actually more important. So if you find it, let me know too.
-Joel
The new screetching is due to the Superchip's increased torque and faster shifting. I says in the manual, it's (the tensioner) non-adjustable. It's spring loaded. So it's always tensioning the belt. So it should never get loose. The factory didn't take in account the quick shift characteristics of the Superchip. It does suck. But I just try to ignore it. There is a thread somewhere where Mike actually replies. Forgot what he said. But a couple of the solutions was to spray belt dressing or just buy a new belt. But I just bought a new belt, and it still made the noise (actually got worse after new belt??). There was one more, and it was actually more important. So if you find it, let me know too.
-Joel
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From: Kemah, TX
ken800,
[Found it.] But it's your original thread. [... the transmission is just shifting faster than the belt is turning... kind of.]
-Joel
[ ] <-- identifies original post
[Found it.] But it's your original thread. [... the transmission is just shifting faster than the belt is turning... kind of.]
-Joel
[ ] <-- identifies original post
Last edited by red bull; Oct 2, 2001 at 05:37 PM.
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From: Oregon
The transmission is shifting faster than the belt?
WTF, are you talking about tranny belts? The engine driven serpentine belt has ZERO to do with the transmission. There is not a idler or pulley on the engine to drive the transmission. That is just nonsense you are talking here.
There is a wear indicator on the self adjusting tensioners. That will tell you if you need to replace a belt. IF are within the wear marks and having problems, the belt is glazed. You can get temporary relief by using the belt dressing, but a new belt is what you need to solve the problem. FYI, keep your old one and stuff it under the seat for an extra in case of an emergency!
WTF, are you talking about tranny belts? The engine driven serpentine belt has ZERO to do with the transmission. There is not a idler or pulley on the engine to drive the transmission. That is just nonsense you are talking here.
There is a wear indicator on the self adjusting tensioners. That will tell you if you need to replace a belt. IF are within the wear marks and having problems, the belt is glazed. You can get temporary relief by using the belt dressing, but a new belt is what you need to solve the problem. FYI, keep your old one and stuff it under the seat for an extra in case of an emergency!
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From: Houston, by way of every major city in America.
I think he just meant that the belt tensioner isn't designed to keep up with anything other than a softly driven stock engine. I do believe that it could be caused by the shift characteristics with a chip. The factory inputs a soft shift technique to stop things from happening so quickly. When you overide it, it kicks a little harder than usual, causing the belt tensioner to strain. When it can't handle the extra tension, the belt slips momentarily. Sounds logical to me anyway
I have an ext cab, what do you guys drive? Mine has never really screeched on a shift, maybe it's only the lighter models?,,,,98
I have an ext cab, what do you guys drive? Mine has never really screeched on a shift, maybe it's only the lighter models?,,,,98
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From: Oregon
BS FLAG IS UP!
what do you think flexes with the engine serpentine belt setup? nothing as designed. Only thing that has adjustability is the tensioner and that really should not move if the belt is not stretching.
It is kind of far fetched that cause it "shifts so much firmer" that it caused the engine to slow so drasitcally the that belt slips on the pulleys. come on, that is way stretching the truth there. You may have an arguement with a v belt but not a serpentine. Look at the amount of contact area on a 6 or 8 rib vs a V belt. Also if that were true with the chip and the belts, people with blowers when they rev the motor so quickly in neutral would have the same problem. Sorry, does not happen. I am putting out the BS flag on this one. Sorry mike.
It is kind of far fetched that cause it "shifts so much firmer" that it caused the engine to slow so drasitcally the that belt slips on the pulleys. come on, that is way stretching the truth there. You may have an arguement with a v belt but not a serpentine. Look at the amount of contact area on a 6 or 8 rib vs a V belt. Also if that were true with the chip and the belts, people with blowers when they rev the motor so quickly in neutral would have the same problem. Sorry, does not happen. I am putting out the BS flag on this one. Sorry mike.
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From: Kemah, TX
How dare you talk to me that way. You don't even know me.
Because I am more mature than you, Matt90GT, this is the last time I notice you.
-Joel
I'm sorry I had to lower myself, everyone.
Because I am more mature than you, Matt90GT, this is the last time I notice you.
-Joel
I'm sorry I had to lower myself, everyone.
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From: Houston, by way of every major city in America.
Okay, what's your theory, then? Sorry I left out that the engine is affected by a chip as well. Is it so hard to believe that 20 or so extra HP(and more torque?) can cause a tensioner to slack up when a strain is put on it? The tensioner is not fixed if I remember correctly, it's spring loaded. Hell, maybe the belt "is" stretching?,,,,,, BS flag?,LMAO,,,,98
Last edited by 98SCREAMER; Oct 1, 2001 at 08:04 PM.
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From: Mesa, AZ USA
I can't say much about the chip and quicker shifting but I do know that my truck would squeal something bad at 3000 rpms and up.(usually when it's about ready to shift) I changed the belt and no more squeal. My belt had about 68k on it.
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From: Houston, tx
Guys, Guys!
Sorry to stir up the hornets nest. Relax.... It was a simple question I thought . Basically, when I shift 1-2 under hard accleration, I get a mild screech that coincides perfectly during the shift. My truck is new. (4000 miles) It did not screech before the chip.
So... First, is it most likely the serpentine belt? If not, what else could it be? If the tensioner is not adjustable then what? I will put a little belt dressing on it to see what happens. I would rather not, of course, because that stuff is messy. (maybe it is the applier and not the product itself
)
Finally, which belt, specifically, is the serpentine?
Sorry to stir up the hornets nest. Relax.... It was a simple question I thought
. Basically, when I shift 1-2 under hard accleration, I get a mild screech that coincides perfectly during the shift. My truck is new. (4000 miles) It did not screech before the chip.So... First, is it most likely the serpentine belt? If not, what else could it be? If the tensioner is not adjustable then what? I will put a little belt dressing on it to see what happens. I would rather not, of course, because that stuff is messy. (maybe it is the applier and not the product itself
)Finally, which belt, specifically, is the serpentine?
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From: Houston, by way of every major city in America.
Look closely at your engine, the belt is all one piece
Hence the name. It snakes around all the pulleys. The tensioner puts a load on the belt to keep it tight. This is much simpler than a V-belt system. Because the belt is replaced as one piece, it can be done much quicker. You don't have to adjust each accesssory individually. I'm not sure why yours is slipping during shifts, mine is fine
,,,,,98
Hence the name. It snakes around all the pulleys. The tensioner puts a load on the belt to keep it tight. This is much simpler than a V-belt system. Because the belt is replaced as one piece, it can be done much quicker. You don't have to adjust each accesssory individually. I'm not sure why yours is slipping during shifts, mine is fine ,,,,,98
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From: INDIANA,.....USA " Where more than Corn grows in Indiana"!!!
No Way!!!!!
There is no way its the belt tensioner. The spring would have to give to do this. As anyone here replaced one???? I have, they won`t give that way, very hard to move . They have pressure all the time to make the belt tight all the time not loose. I thought I had tensioner problems at one time. After replacing it , I know now I was wrong & $45.00 later.
Lariat#1
Lariat#1
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From: Oregon
you ever think it is your tires on the 1-2 shifts?
Ask Loc about that one, 4.56s 35s and now a transgo and tire chirps on the 1-2 shifts no at WOT. Oh, he does have a superchip also installed.
Most likely the belt is glazed. replace it.
Ask Loc about that one, 4.56s 35s and now a transgo and tire chirps on the 1-2 shifts no at WOT. Oh, he does have a superchip also installed.
Most likely the belt is glazed. replace it.
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Matt, you have got to be one of the most hard headed people on this board. You have a problem with admitting other people, besides you, can be even remotely correct about something you don't agree with.
Tires squealing? I think most people can tell the difference between tires and the serpentine belt squealing. You must have a very low opinion of people's intelligence to make that kind of statement.
There is definitely a problem with squealing belts on the 5.4L engines. My squealing belt (only when flooring it) was fixed with just 1,000 miles on the engine. You can't be serious when you paint the squealing belt problem with a wide brush that they're all glazed and they have to be replaced. How can a belt get glazed in less than 1,000 miles?
My thinking is, if everything isn't just right, the belt system can't handle the increased RATE of the engine spooling up to max rpm. In other words, the belt slips until it has a chance to catch up with the engine or the rpm drops. I don't think the transmission shifting has anything to do with it. It's just the fact that the engine reaches top rpm a lot faster with the chip.
The reason people are noticing it at the 1-2 shift is because the engine hits top shift rpm the quickest at that shift point. It takes longer to reach the top rpm on the 2-3 and 3-4 shift points.
Tires squealing? I think most people can tell the difference between tires and the serpentine belt squealing. You must have a very low opinion of people's intelligence to make that kind of statement.
There is definitely a problem with squealing belts on the 5.4L engines. My squealing belt (only when flooring it) was fixed with just 1,000 miles on the engine. You can't be serious when you paint the squealing belt problem with a wide brush that they're all glazed and they have to be replaced. How can a belt get glazed in less than 1,000 miles?
My thinking is, if everything isn't just right, the belt system can't handle the increased RATE of the engine spooling up to max rpm. In other words, the belt slips until it has a chance to catch up with the engine or the rpm drops. I don't think the transmission shifting has anything to do with it. It's just the fact that the engine reaches top rpm a lot faster with the chip.
The reason people are noticing it at the 1-2 shift is because the engine hits top shift rpm the quickest at that shift point. It takes longer to reach the top rpm on the 2-3 and 3-4 shift points.