06-28-2017, 09:29 PM | #1 |
Drives: 1996 z28 Join Date: May 2016
Location: upstate SC
Posts: 17
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Axle shaft bolts came out today!
So I was driving and I feel a slight vibration. No other noises or anything just a slight vibration that I first thought was from the road(contruction zone) or tire. But I wasn't getting any alerts about tire pressure and then after probably less than 3 miles from the start I hear and feel something let go in the rear and then a grinding noise. And then it felt like the transmission was slipping so I immediately pull over and get out I can immediately smell the differential fluid and look under and see the drivers side axle shaft has decided to divorce itself from the diff!
Car is a 2016 2ss auto with 17k miles. I've never abused it either. I drive it fast but never anything that would hurt the rear end like that. Definitely disappointed in it. Still love the car but definitely a downer. |
06-28-2017, 09:37 PM | #2 |
#becauseracecar
Drives: 2016 SS Sedan, 2016 Camaro SS Join Date: May 2015
Location: Phoenix
Posts: 2,959
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That's a bummer. There have been other members here that have had those bolts back out as well.
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06-28-2017, 10:07 PM | #3 |
Drives: 16 2SS 6MT NPP MRC / 15 K1300S Join Date: Mar 2016
Location: NW of Austin
Posts: 1,034
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There has to be something that can be done to try to prevent this from happening. A good soaking with Loctite 290 maybe?
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Rohana RFX-5 10/11, M/T 275/305, Eibachs, Hellwigs, Hurst SS, DMS LT4 SC 596HP/589TQ, DMS Low-side, Kooks 2LTs, MBRP Race, Rotofab, MMS CC |
06-28-2017, 10:57 PM | #4 | |
Drives: 1996 z28 Join Date: May 2016
Location: upstate SC
Posts: 17
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Quote:
TSB # 16-NA-399 Subject: Information on Replacing Half Shaft Fasteners with Revised Parts Brand: Model: Model Year: VIN: Engine: Transmission: from to from to Cadillac ATS-V 2016 2017 LF3, LF4, LT1, LT4 CTS-V 2015 2017 Chevrolet Camaro 2016 2017 Involved Region or Country North America and N.A. Export Regions Condition The technician may need to perform a repair that requires the half shaft bolts to be removed. Information This bulletin advises the Service Technician of new longer bolts and lock washers required to be installed during any repair that requires the half shaft bolts to be removed or replaced. Three retainer assemblies required per half-shaft. Each retainer (3) requires 2 bolts (1) and 2 washers (2) to make a retainer assembly. Where applicable, each axle assembly uses 3 retainer assemblies per side. Each repair kit contains 6 bolts and 6 washers. 1 kit for each half shaft. Replacement of all axle bolts are required during repair. Correction If half-shaft has been separated from the differential: Remove and discard only the half shaft bolts. If required, clean and reuse retainers. Replace the shorter bolts (1) with a new longer bolt (2) and washer. Install the lock washers onto the bolts. Install bolt and washer assembly into retainer. Torque bolts to proper torque specifications. Refer to Fastener Specifications in SI. Service stock half shafts may include POA bolt/retainer assemblies. These assemblies may require rework with longer fasteners. The new half shaft bolts must be removed, measured and discarded if the length is incorrect. Parts Information Note: To obtain the bolts and washers, fax the form included in this bulletin to the GM Warranty Parts Center (WPC). Request WPC #816. Use the Vehicle Identification Number (VIN), SI, and the GM Electronic Parts Catalog to determine the proper part numbers for the half shaft, if replacement is required: Description Part Number Qty Bolt/Washer WPC #816 1 kit (6 bolts/6 washers) IMPORTANT NOTE WHEN PRINTING THIS FORM: If the form prints out on two pages, make certain you fax BOTH pages so that the WPC receives all the needed information. Missing information will delay or prevent the part from being shipped. Parts Request Form – Warranty Parts Center Use this form ONLY for U.S. and Canadian Dealers. Export markets and Mexico Dealers must contact their regional Technical Assistance Center for assistance. To: Warranty Parts Center e-mail: warrantypartscenterUSA@gm.com or WPC Fax: 248-371-0192 Attn: Temporary Service Parts Part Being Requested: WPC #816 Bolt and Washer kit |
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07-02-2017, 08:39 AM | #5 |
Drives: 16 2SS 6MT NPP MRC / 15 K1300S Join Date: Mar 2016
Location: NW of Austin
Posts: 1,034
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Did that post contain the actual document or only the text? I'd email it in and try to get a set for myself since there is no part number for them.
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Rohana RFX-5 10/11, M/T 275/305, Eibachs, Hellwigs, Hurst SS, DMS LT4 SC 596HP/589TQ, DMS Low-side, Kooks 2LTs, MBRP Race, Rotofab, MMS CC |
07-02-2017, 10:07 PM | #6 | |
Drives: 1996 z28 Join Date: May 2016
Location: upstate SC
Posts: 17
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Quote:
http://www.cadillacforums.com/forums...formation.html You might be able to get it from the dealer with the TSB# or wpc #816 |
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07-03-2017, 07:54 AM | #7 |
H-Town Camaro Club Member
Drives: 17 Hyper Blue Metallic KLR-ZL1 Join Date: May 2009
Location: Pearland Tx.
Posts: 2,035
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This would be bad on a road course at high speed. I still can't believe a lot of issues have been going on for over a year now and nothing has been corrected on the assembly line. I do know for those that fix these issues themselves it never gets reported to GM to let them know how big of a problem these really are. I hope this one doesn't happen to me when I'm tracking my ZL1.
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07-03-2017, 10:26 AM | #8 | |
Drives: 67 goat, 69 goat ram air III Join Date: Mar 2009
Location: South texas
Posts: 1,443
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Quote:
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07-03-2017, 01:23 PM | #9 | |
Drives: 2016 2SS Red Hot Join Date: May 2016
Location: Southern Maryland
Posts: 627
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Quote:
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07-04-2017, 08:01 PM | #10 | |
Drives: 1996 z28 Join Date: May 2016
Location: upstate SC
Posts: 17
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08-09-2017, 04:42 PM | #11 |
Drives: 99 M3, 04 STi, 16 2SS Join Date: Oct 2016
Location: CT
Posts: 187
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Just took my car in for a semi-related issue and figured I would post here rather than adding a new thread.
Noticed last night pulling into my driveway that I had some kind of scraping / grinding / squeaking noise from the rear of the car. Took it in this morning (dealer is fortunately about 1 mile or so from my house). I immediately assumed that my diff was toast since I still have some diff noise like pretty much everyone else. Anyway, turns out that axle bolts were under torqued. From the explanation that I was given, it was the opposite end of the axle to the OP, ie. at the hub. Car has 7k currently. Not abused AT ALL. Not one burn out, never raced, etc. pure daily driver. It's a mystery to me how this could cause the symptoms that I had but they retorqued the bolts to spec and it does seem to fixed for the moment. From the service guy's description, they seemed rather mystified by it as well but apparently the GM service protocol calls for checking this and sure enough it seemed to fix it. I expressed my concern about wear to the axle or hub splines given the noise but was assured it was completely fine (not so sure about that, but probably not much I can do about it). |
08-10-2017, 01:16 AM | #12 |
SoCal HT5! SD
Drives: 2016 red hot 2ss M6 Join Date: Nov 2011
Location: San Diego CA,
Posts: 1,929
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Well... thats not supposed to happen.
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08-10-2017, 11:03 AM | #13 |
マスタング = 遅い
Drives: 2017 Chevrolet Camaro SS 1LE Join Date: Aug 2015
Location: Florida
Posts: 7,061
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Regardless of any issues, axle bolts on a car like this are something that I would recommend checking at each oil change...if the bolts are backing out, you can most likely catch it then. I checked mine at 1000 miles, and they are all good.
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08-10-2017, 11:04 AM | #14 | |
マスタング = 遅い
Drives: 2017 Chevrolet Camaro SS 1LE Join Date: Aug 2015
Location: Florida
Posts: 7,061
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