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05-17-2017, 11:55 PM
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#1 |
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Registered User
Join Date: Mar 2014
Location: Corvallis, OR
Posts: 715
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4L60E Squeak
My 4L60E has been squeaking for a while. Turning the tires with the rear end off the ground or running the vehicle it is clearly audible, and it sound likes it is in the rear half of the transmission.
I thought the output shaft snap ring failed, but when I removed the transfer case, the shaft felt solid and wouldn't move more than 1/8". So, what is likely wrong with this 4L60E? It is a 1997 model with I suspect about 250,000 miles. Not sure how many on the rebuild though. I've read that sometime a rear planet will cause the squeak. Any thoughts?
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1972 GMC Jimmy Custom 4.8L (L20)/6L90E/NP205 1989 Chevy Suburban V2500 350/Turbo 400/4.11 gears 1996 Chevy Suburban K1500 350/4L60E |
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05-18-2017, 08:51 AM
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#2 |
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Active Member
 
Join Date: Jul 2007
Location: Centrally located between Houston, Austin and Waco. BCS area.
Posts: 7,947
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Re: 4L60E Squeak
I have found that a 3 foot section of stiff garden hose works good as a stethoscope to isolate noises to a particular area. You can direct one end to the suspected area without you or your hand getting in the way.
Since you can duplicate the squeak while parked, you may be able to isolate the exact location on your truck (safety in mind, of course) or you can take it to a shop with a lift to see if they can at least locate the area it's coming from.
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68 GMC 250/3 speed Saginaw p/b p/s 69 Chevy 350/350 currently in pieces still lookin for a cab 06 Trailblazer I just want a vehicle that I can work on, that won't talk to me, leave error msgs or keep track of how I drive... |
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05-18-2017, 09:24 AM
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#3 | |
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Registered User
Join Date: Apr 2011
Location: Klein Texas
Posts: 3,852
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Re: 4L60E Squeak
Sounds like you are turning the roller clutch. They make that squeaking noise when turned in the freewheel direction. Completely normal
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My Classics: '72 K20 Suburban + '65 Dodge Town Wagon '72 Corvette Roadster +'67 Corvette Roadster '73 Z-28 Camaro '63 Ford SWB Uni Pickup '50 Ford Coupe Last edited by Bigdav160; 05-18-2017 at 09:33 AM. |
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05-18-2017, 10:15 PM
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#4 |
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Account Suspended
Join Date: Jun 2015
Location: No longer here
Posts: 1,000
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Re: 4L60E Squeak
Does the noise change when the transmission shifts to different gears ? Or does it make noise in every gear ? Does the noise go away at all ?
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05-18-2017, 11:31 PM
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#5 |
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Registered User
Join Date: Mar 2014
Location: Corvallis, OR
Posts: 715
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Re: 4L60E Squeak
I'm very sure it isn't a u-joint. I crawled under it while running and shut-off. Any time the tires are turning it can be heard.
When the gf first mentioned it, I thought it was a u-joint or some brake noise, but the noise is definitely coming from the transmission output shaft in some way. It must be something directly splined to the output since it doesn't change speed/pitch when going from 1-2 or 2-3. The noise is about the same volume any time the vehicle is moving, and around about 30-35 mph, road noise/wind noise is louder than the squeak.
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1972 GMC Jimmy Custom 4.8L (L20)/6L90E/NP205 1989 Chevy Suburban V2500 350/Turbo 400/4.11 gears 1996 Chevy Suburban K1500 350/4L60E |
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05-19-2017, 06:48 AM
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#6 |
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Account Suspended
Join Date: Jun 2015
Location: No longer here
Posts: 1,000
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Re: 4L60E Squeak
Could be the rear torrington bearing that sits against the case and the ring gear. Just a guess....
You had mentioned you pulled the Transfer case out, did you drop the transmission pan to see if any thing in the pan (metal).... |
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05-19-2017, 02:37 PM
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#7 |
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Registered User
Join Date: Mar 2014
Location: Corvallis, OR
Posts: 715
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Re: 4L60E Squeak
I haven't pulled the pan yet.
I'm still trying to figure out what I want to do. I have other projects going on and this was supposed to be a weekend sort of deal, but I think I'm going to have to rebuild the transmission.
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1972 GMC Jimmy Custom 4.8L (L20)/6L90E/NP205 1989 Chevy Suburban V2500 350/Turbo 400/4.11 gears 1996 Chevy Suburban K1500 350/4L60E |
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05-19-2017, 06:48 PM
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#8 |
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Account Suspended
Join Date: Jun 2015
Location: No longer here
Posts: 1,000
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Re: 4L60E Squeak
Well, you are half way there with the transfer case pulled already....an hour or so the transmission would be on your bench...GOOD LUCK !!!!!
Did you start another thread regarding the build list for this transmission.....sun shell failed ? You lose gears when the sun shell fails....can you tell us which gears you lost....noise in all gears ? Noise in Reverse too ? No Reverse ? Last edited by YoungPup1977; 05-19-2017 at 09:37 PM. |
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05-20-2017, 01:17 AM
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#9 |
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Registered User
Join Date: Mar 2014
Location: Corvallis, OR
Posts: 715
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Re: 4L60E Squeak
That transmission failed about 2 years ago, maybe 3. Didn't have time to rebuild it then, and just swapped in a used unit and figured I would rebuild it later on. That seems to have come now that the transmission in it has failed.
The other transmission failed randomly one day. Worked fine everyday up to that. I pulled out on the highway from a stop. Accelerated through first, shifted into second, and got a ridiculously loud grinding and no power. Reverse and 2nd were out. Still had first, but never confirmed 3rd or 4th. The noise sounded like someone stripping out the head on a phillips screw with a drill, only about 10 times louder.
__________________
1972 GMC Jimmy Custom 4.8L (L20)/6L90E/NP205 1989 Chevy Suburban V2500 350/Turbo 400/4.11 gears 1996 Chevy Suburban K1500 350/4L60E |
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05-20-2017, 11:38 PM
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#10 |
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Account Suspended
Join Date: Jun 2015
Location: No longer here
Posts: 1,000
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Re: 4L60E Squeak
These forums are great .....now I have a squeak in my 4l80E only in second...can you help me out with my problem...by the way I have all my gears....
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05-24-2017, 01:14 AM
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#11 | |
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Senior Member
 
Join Date: Feb 2001
Location: New Madison, Ohio
Posts: 21,377
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Re: 4L60E Squeak
Quote:
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A husband can be right...or...A husband can be happy.  67-72 Chevy and GMC Trucks...The Classic Truck for the Classic Folk.  1970 CST Two tone green, 402BB, 400 Automatic, Tach, Buckets, AC, AM-FM, Tilt, GM CB, GM 8 Tract, LWB, etc   JOHN 17:3...The better side of "LIFE" Remember: Everyday is a good day...Some are just gooder! |
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05-26-2017, 03:58 PM
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#12 |
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Account Suspended
Join Date: Jun 2015
Location: No longer here
Posts: 1,000
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Re: 4L60E Squeak
Should I open my own thread on my issue I have now ?
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05-27-2017, 06:45 AM
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#13 | |
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Registered User
Join Date: Oct 2013
Location: Maine
Posts: 2,400
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Re: 4L60E Squeak
Quote:
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76 Chevy K20 76 GMC K15 77 Chevy C10 77 Chevy K10 |
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05-27-2017, 07:54 AM
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#14 | |
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Account Suspended
Join Date: Jun 2015
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Re: 4L60E Squeak
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