Grit dog
Black Diamond, WA
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Joined: 05/06/2013
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And a word of caution about serpentine belts and goop on them.
Not like v belts. And of course the soap trick is opposite of belt dressing. Lube vs sticky.
Never use belt dressing on a serpentine belt unless you absolutely have to get more belt grab and can’t replace the tensioner.
2016 Ram 2500, MotorOps.ca EFIlive tuned, 5” turbo back, 6" lift on 37s
2017 Heartland Torque T29 - Sold.
Couple of Arctic Fox TCs - Sold
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Grit dog
Black Diamond, WA
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Joined: 05/06/2013
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Back to drivetrain squeaks. Our 86 GMC K20 has a little speed dependent squeak aft of the transfer case. 1 piece driveshaft.
This is one that would stump most and I’m not totally sure what it is even.
Not outer axle bearings, not brakes/drums and I pulled the driveshaft and both u joints feel perfect.
And it only does it when the truck is in motion. In gear with rear wheels in the air, no squeak.
Best I can figure is one of the u joint cups that I can’t pull without popping the u joint out is just beginning to dry out. Just enough to make noise but probably won’t be evident wear for quite a few more miles.
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klutchdust
Orange, California
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Joined: 06/09/2004
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Grit dog wrote:And a word of caution about serpentine belts and goop on them.
Not like v belts. And of course the soap trick is opposite of belt dressing. Lube vs sticky.
Never use belt dressing on a serpentine belt unless you absolutely have to get more belt grab and can’t replace the tensioner.
I didn't word my post correctly. What I meant to say is use the soap trick to see if it changes the squeak, then you would know it's the belt. I personally have not used belt dressing on my vehicles
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klutchdust
Orange, California
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Joined: 06/09/2004
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Grit dog wrote:Back to drivetrain squeaks. Our 86 GMC K20 has a little speed dependent squeak aft of the transfer case. 1 piece driveshaft.
This is one that would stump most and I’m not totally sure what it is even.
Not outer axle bearings, not brakes/drums and I pulled the driveshaft and both u joints feel perfect.
And it only does it when the truck is in motion. In gear with rear wheels in the air, no squeak.
Best I can figure is one of the u joint cups that I can’t pull without popping the u joint out is just beginning to dry out. Just enough to make noise but probably won’t be evident wear for quite a few more miles.
"And it only does it when the truck is in motion.' hmm. that's a good one. First thought would be suspension related or something to do with the body and chassis flexing against each other. On the stands it's stationary. Body mount or rubber worn? I owned 2 K-5 one "85 and one "90 they were tight despite the use they got. Found out the 90 was on a chassis that was also used for utility trucks like catering trucks. Explains the frustration in getting chassis parts, one sharp eyed parts guy told me about it when I needed motor mounts.
Off topic but .....
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tomcat88
prescott valley
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Here a squeaking noise I had in my class C at 17000 miles that made me crazy till I found it, where they cut the roof of the cab out, (the haft round) they riveted the medal to the wood (not good) the rivets came loose and the medal would rub on the wood going down the road. I pulled out the head liner and installed about 30 self-tapping lath screws #8 1/2" Problem solved 60,000 miles later still good.
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klutchdust
Orange, California
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Joined: 06/09/2004
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tomcat88 wrote:Here a squeaking noise I had in my class C at 17000 miles that made me crazy till I found it, where they cut the roof of the cab out, (the haft round) they riveted the medal to the wood (not good) the rivets came loose and the medal would rub on the wood going down the road. I pulled out the head liner and installed about 30 self-tapping lath screws #8 1/2" Problem solved 60,000 miles later still good.
My 09 Cambria had the tv mounted in that area, I had that squeak. Actually two squeaks. They epoxied or glued metal brackets to the roof cutout area then fastened the nose cone to that. well over time they came loose. I used a very strong product that cured that, well then there was another one. They had speakers on both sides of the TV mounted in a wood frame. After a application of wood glue and a few extra screws the squeak was gone.
That tapping sound you hear my dear? well the strap that you pull the awning down with would do that. Even as obvious as it was it stumped me for awhile.
Best hint I learned was using towels in-between pots and pans etc. Once I had my new stereo system installed i hardly noticed any of those squeals.
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Travelin2
SW Florida
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I had a similar squeak on a previous RV. It droves us crazy and like yours it would start when driving at a slow speed and eventualy stop after things got warmed up. I swore it had to be in the suspension/drive works of the rig but it was not. After sitting overnight or even when we were stopped at a restaurant if it was cool outside, the tires develop a flat spot where it meets the ground. As you start driving it starts a bit of shaking in the motorhome. As the tire warms a bit from driving it warms and the flexing of the tire limbers up the tire and the flat spot goes away and so does the minor tremors traveling through the coach. One morning we headed out on another trip and that damned squeak started up. For some reason a thought occurred to me. We were still near home and on a slow speed road,right in the "squeak zone". I ask my wife to go to the entry door and open it up. Upon opening the door the squeak stopped instantly. It turned out the slight tremor caused by the stiff tire flat spots was causing the
door to move ever so slightly in its' opening and the aluminum of the door was rubbing against the aluminum of the door frame, causing the squeak. End of story and end of squeak.
John & Gloria
South West, Florida
2009 Leisure Travel Serenity
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SJ-Chris
San Jose, Ca
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Travelin2 wrote:I had a similar squeak on a previous RV. It droves us crazy and like yours it would start when driving at a slow speed and eventualy stop after things got warmed up. I swore it had to be in the suspension/drive works of the rig but it was not. After sitting overnight or even when we were stopped at a restaurant if it was cool outside, the tires develop a flat spot where it meets the ground. As you start driving it starts a bit of shaking in the motorhome. As the tire warms a bit from driving it warms and the flexing of the tire limbers up the tire and the flat spot goes away and so does the minor tremors traveling through the coach. One morning we headed out on another trip and that damned squeak started up. For some reason a thought occurred to me. We were still near home and on a slow speed road,right in the "squeak zone". I ask my wife to go to the entry door and open it up. Upon opening the door the squeak stopped instantly. It turned out the slight tremor caused by the stiff tire flat spots was causing the
door to move ever so slightly in its' opening and the aluminum of the door was rubbing against the aluminum of the door frame, causing the squeak. End of story and end of squeak.
Thanks for the feedback. Wow...that would be a very hard squeak (the one you figured out)! It's the on again, off again issues that are sometimes very hard to pinpoint (...especially for us weekend mechanics). For now, my squeak has suddenly stopped. Could have something to do with the wet weather. I'll take it out again for a drive next week and see if it squeaks or not. I'll post an update if I discover anything new.
-Chris
San Jose, CA
Own two 2015 Thor Majestic 28a Class C RVs
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