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12-06-2011, 07:59 AM
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#1
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Junior Member
Join Date: Dec 2011
Posts: 1
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Whistle noise at idle after warm up
Hi, new to forums, so sorry if I'm not up to speed....I have a 95, 40' gulf stream tour master, with an 8.3l turbo diesel and a six speed allison automatic transmission. After warming up and before shifting, there is a high pitched noise coming from the pan area of the transmission...just drove 1000 miles after purchasing it to get home with out any shifting issues, the fluid is nice and red and possibly a little over filled....
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12-06-2011, 09:40 AM
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#2
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Senior Member
Join Date: Nov 2011
Posts: 204
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I am a retired cross country trucker, I would think it would be difficult to pin point the whistle to be in the trans oil pan. noise is deceiving. I have the same engine & trans in my 1999 Alpine. I would guess the noise you hear is from the turbo. We expecially hear this at an idle. Stop by a local truck stop where a truck may be ideling and see if this is the noise you hear. Cummins gas had a idle whistle in the turbo for many years. What I am describing is not a mechanical problem, its the nature of the beast. If this whistle is going down the road, it may whistle some and then quit when it shifts.If this is so, it is perfectly norman turbo boost noise. Under acceleration the whistle may get louder as the turbo is creating more boost, This is a good think. If I can be of more help, call me 314 610 2622
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12-06-2011, 09:54 AM
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#3
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Senior Member
Damon Owners Club Workhorse Chassis Owner
Join Date: Mar 2009
Posts: 24,024
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Normally a whistle noise means a vacuum leak.. HOWEVER on the Workhorse Gas models (I do not know about diesels in this respect as I drive a Gas model) there is a "Rushing" sound (my description) that might well sound like a whistle when the unit is at idle.
It is the fuel pressure regulator shunting excess fuel back to the tank,
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Home is where I park it!
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12-16-2011, 12:10 AM
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#4
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Senior Member
Join Date: Aug 2011
Posts: 1,126
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wa8yxm...no disrespect meant but what does a workhorse gasser have to do with the OPs question/concern?
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12-16-2011, 12:14 AM
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#5
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Senior Member
Country Coach Owners Club Solo Rvers Club iRV2 No Limits Club
Join Date: May 2011
Location: Vancouver, WA
Posts: 37,725
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Quote:
Originally Posted by Old Trucker
I am a retired cross country trucker, I would think it would be difficult to pin point the whistle to be in the trans oil pan. noise is deceiving. I have the same engine & trans in my 1999 Alpine. I would guess the noise you hear is from the turbo. We expecially hear this at an idle. Stop by a local truck stop where a truck may be ideling and see if this is the noise you hear. Cummins gas had a idle whistle in the turbo for many years. What I am describing is not a mechanical problem, its the nature of the beast. If this whistle is going down the road, it may whistle some and then quit when it shifts.If this is so, it is perfectly norman turbo boost noise. Under acceleration the whistle may get louder as the turbo is creating more boost, This is a good think. If I can be of more help, call me 314 610 2622
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I didn't realize the Cummins made a gas engine, when was that?
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2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft, HWH Active Air
Charter Good Sam Lifetime Member, FMCA,
RV'ing since 1957, NRA Benefactor Life, towing '21 Jeep JLU Rubicon Ecodiesel
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