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#1 |
Registered User
Join Date: Oct 2010
Location: Tujunga, CA
Posts: 262
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Odd question: Are our trucks supposed to sound loud?
I know, odd title, but keep on reading, hopefully I will explain myself.
I ask this odd question, because my truck is just plain loud. When I am driving, as it's attempting to shift into the second gear, the engine is really loud, almost like it's racing, then around 40mph, boom shifts into the next gear and settles down. Is this normal? Does it sound like this because our trucks are old, not much sound proofing, etc? I can't tell what rpm it's at, because I don't have a tachometer. Now don't get me wrong, I love the sound of loud things. But is my truck normal?
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Thanks, Emil 1972 Chevy C20 |
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#2 |
Registered User
Join Date: Jun 2010
Location: stigler, oklahoma
Posts: 190
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Re: Odd question: Are our trucks supposed to sound loud?
Well yes and no. It depends on how high it is. Mine gets pretty loud around that speed but when it shifts its hard but not like wow u no wat I mean.
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71 c10 with a 305. new dd wohoo 1956 chevy bel air hard top with a 327. 1998 honda passport V6 old dd. |
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#3 |
Registered User
Join Date: Mar 2009
Location: Youngsville, NC
Posts: 952
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Re: Odd question: Are our trucks supposed to sound loud?
Something to consider: Do you have a direct cooling fan on your engine? I had one on my 69 and it was exactly like you described. In fact, one of my neighbors flagged me down and gave me a lecture for driving too fast (I was doing 25mph) and I think it was due to the loud fan and powerglide transmission...but I digress.
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1969 C10 SWB Project Charity Case AKA "Roscoe" 1971 Cheyenne Super A Combined Effort The Service Station-A practical ministry for those in need |
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#4 |
20' Daredevil (Ret)
![]() Join Date: May 2003
Location: Jefferson State
Posts: 13,641
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Re: Odd question: Are our trucks supposed to sound loud?
^ Ya beat me to it. I was thinking the roar of a fixed-blade fan. A clutch fan will be much easier on your ears, and provide better cooling to boot. And oh yeah, free up a bit of power and slightly improve your fuel mileage.
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- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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#5 |
Registered User
Join Date: Oct 2010
Location: Tujunga, CA
Posts: 262
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Re: Odd question: Are our trucks supposed to sound loud?
Oh ya, I know what you mean. Mine sometimes shifts hard, sometimes it's smooth. I'm not worried about that yet, I know the truck is old, transmission is old, etc. I was just concerned about the "loud" sound.
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Thanks, Emil 1972 Chevy C20 |
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#6 |
Registered User
Join Date: Oct 2010
Location: Tujunga, CA
Posts: 262
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Re: Odd question: Are our trucks supposed to sound loud?
I don't know what kind of cooling fan it is. How do I tell the difference? Is the clutch fan install easy?
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Thanks, Emil 1972 Chevy C20 |
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#7 |
the boat guy
Join Date: Jul 2007
Location: springfield mo
Posts: 2,339
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Re: Odd question: Are our trucks supposed to sound loud?
clutch fan is a stock fan.
3 things to remember if its loud it better be fast if its low it better handle if it has a wing it better fly!
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67, swb, fleet, tach, throttle, 5.3, 4l60e, 3.73's, fuel cell, 5 lug, p.d.b., 4-6 drop. great little truck 66, stevens drag/ski 18' silouette, 350, 2.02 doublehump heads. comp extreme marine 278 cam, vette 7 fin valve covers, old polished edelbrock intake, velvetdrive, casale v-drive, adj cavitation plate. 28, model a rpu project, |
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#8 | |
20' Daredevil (Ret)
![]() Join Date: May 2003
Location: Jefferson State
Posts: 13,641
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Re: Odd question: Are our trucks supposed to sound loud?
Quote:
If you have basic mechanical skills, you can change to a clutch fan. You just need to get one that fits (diameter, depth, bolt pattern etc.). A fixed-blade fan might look like this A clutch fan will be more like this, with the fan blade assembly attached to the finned thermostatic clutch.
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- Mike - 1972 K20 LWB 350/350/205 RIP El Jay Last edited by Stocker; 05-26-2011 at 01:13 AM. |
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#9 |
Account Suspended
Join Date: Jul 2006
Location: DFW
Posts: 1,427
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Re: Odd question: Are our trucks supposed to sound loud?
I think if the trans is stock and its going into 2nd at 40, something is wrong. Maybe the shift linkage is maladjusted?
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#10 |
Registered User
Join Date: Jul 2010
Location: SE Washington state
Posts: 80
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Re: Odd question: Are our trucks supposed to sound loud?
Check your vacuum modulator on the tranny. If this is bad or disconnected or a bad vacuum hose going to it the truck will shift exactly like you describe.
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#11 |
Registered User
Join Date: Oct 2010
Location: Tujunga, CA
Posts: 262
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Re: Odd question: Are our trucks supposed to sound loud?
Does anybody have a picture of where to find the vacuum modulator on the transmission?
Once I find the vacuum modulator, how do I know if it's not functioning properly?
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Thanks, Emil 1972 Chevy C20 Last edited by emil77; 05-26-2011 at 08:37 AM. |
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