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Technical Questions?

Squeaky Leaf Springs


This is a discussion on Squeaky Leaf Springs within the Technical Questions? forums, part of the TMC TECHNICAL category!
OK, anyone have any ideas on how to stop the leaf springs from squeaking? They used to only do it ...

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Old 09-17-2009, 04:20 PM
Vmax2007
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Squeaky Leaf Springs

OK, anyone have any ideas on how to stop the leaf springs from squeaking? They used to only do it when the chassis was under torsional load (i.e. going up a driveway entrance curb at an angle). Now they squeak almost constantly and it's starting to annoy me. I do know it's the leaf springs because I can spray them down with WD40 or Silicone spray and it will stop/minimize the squeaking for a few days. Is there a permanent solution?
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Old 09-17-2009, 04:31 PM
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Have you sprayed lithium grease, like you would for a garage door, between the springs?
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Old 09-17-2009, 04:33 PM
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Have you sprayed lithium grease, like you would for a garage door, between the springs?
No, I haven't. Think that will last?
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Old 09-17-2009, 04:34 PM
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It should. It is thicker and better for the noise than WD-40 is. I have used it on other squeaks before, and it works pretty damn good.
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Old 09-17-2009, 04:40 PM
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Do you think that you got any sand in your leaf springs... I sure hope that you haven't been mudding..

My old truck and my brothers Titan would squeak really bad when we went mudding..
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Old 09-17-2009, 04:40 PM
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I wonder if something like this could be helpful: http://www.4wheelparts.com/Lift-Kits...4498&t_pl=3845




Also, here's a TSB for leaf spring noises. Maybe the noises are related and perhaps your dealer would be willing to try this out for you???

Document ID# 1999324
2004 Chevrolet Chevy K Silverado - 4WD


Subject: Rear Leaf Spring Slap or Clunk Noise (Replace Spring Inserts) #03-03-09-002B - (07/23/2007)

Models: 1999-2008 Chevrolet Silverado 1500/2500 Series Pickups

2000-2008 Chevrolet Suburban 2500 Series

2002-2008 Chevrolet Avalanche 2500 Series

2003-2008 Chevrolet Express 2500/3500 Vans with 8500 GVWR (RPO C5F), 8600 GVWR (RPO C6P) or 9600 GVWR (RPO C6Y)

1999-2008 GMC Sierra 1500/2500 Series Pickups

2000-2008 GMC Yukon XL 2500 Series

2003-2008 GMC Savana 2500/3500 Vans with 8500 GVWR (RPO C5F), 8600 GVWR (RPO C6P) or 9600 GVWR (RPO C6Y)


This bulletin is being revised to add model years and update the Parts Information. Please discard Corporate Bulletin Number 03-03-09-002A (Section 03 -- Suspension).


Condition
Some customers may comment on a rear leaf spring slap or clunk noise. This noise is most apparent when the vehicle is operated over irregular road surfaces.

Correction
Important: DO NOT disassemble the main pack on the leaf spring or remove the bushing from the spring.

Verify that the rear leaf spring inserts (1) are present on the leading and trailing ends of the overload spring (second stage leaf). The insert may have broken apart from wear and fallen out. If the inserts are not present, install new ones.

Important: On some models, the vehicle may have to be raised to allow the springs to separate enough so the insert can be installed.

Parts Information
Important: Technicians should refer to the Parts Catalog when ordering the insert.

Part Number
Description

15604067
Insert, Rear Spring Leaf

15247030
Insert, Rear Spring Leaf


Warranty Information
For vehicles repaired under warranty, use:

Labor Operation

E5168
Insulator and/or Insert, Rear Leaf Spring - One or All - Replace
Use Published Labor Operation Time

GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.
WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION


Copyright General Motors Corporation. All Rights Reserved.

Document ID# 1999324
2004 Chevrolet Chevy K Silverado - 4WD
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Old 09-17-2009, 04:42 PM
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Quote:
Originally Posted by dietz4ibanez View Post
Do you think that you got any sand in your leaf springs... I sure hope that you haven't been mudding..

My old truck and my brothers Titan would squeak really bad when we went mudding..
Dirt can certainly create squeaks. With all the salt and sand you guys have spread there, I wouldn't be surprised if it's not adding to your problem.

You might try lifting it up and supporting the frame so you suspension hangs down and then pressure washing in between the leafs as best you can. That's probably a good idea before your grease it up anyway.
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Old 09-17-2009, 05:17 PM
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Thanks daddy. Good info!
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Old 09-17-2009, 05:50 PM
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Don't use a regular grease.. it will attract even more grit and end up like grinding compound. Jack up the body so the axle hangs on the spring pack. Wash out any dirt. Blow out the water with compressed air. Use a dry lube like graphite spray after the pack is dry. Set the truck back down and go for a drive... MG
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Old 09-17-2009, 06:04 PM
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mine squeak about every 6 months.. i just spray wd40 on em.
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