[C2] Bad Vibration
Race Director
Joined: Feb 2007
Posts: 15,468
Likes: 8,950
From: northern california
C2 of Year Finalist (track prepared) 2019
Disadvantages, they break. The rear one on my C4 broke about 3 weeks before the warranty went out. The dealer said they weren't going to fix it because I bought it that way. I didn't and asked what difference that would make as it was still under warranty. After a well placed letter they called me back and fixed it. And at the time there were so many broken they were on national back order.
Safety Car
Joined: Oct 2016
Posts: 4,617
Likes: 1,547
From: Olive branch Ms
I didn't do very well at typing that out. It did look like I bought from the dealer.
Last edited by Robert61; Oct 14, 2017 at 08:51 PM.
Thread Starter
Le Mans Master
Joined: Apr 2013
Posts: 5,001
Likes: 1,056
From: Arlington TX
2024 C1 of the Year Finalist - Unmodified
2023 Restomod of the Year Finalist
2023 C1 of the Year Finalist - Unmodified
In addressing my vibration problem by replacing U joints, I’m having a problem in ordering the ones for the half shafts. Some places list them as “rear axle shaft- left inner, rear axle shaft- right inner, etc. And some stores just list one part # for all. What gives?
Thread Starter
Le Mans Master
Joined: Apr 2013
Posts: 5,001
Likes: 1,056
From: Arlington TX
2024 C1 of the Year Finalist - Unmodified
2023 Restomod of the Year Finalist
2023 C1 of the Year Finalist - Unmodified
Thanks so much for clearing that up. Yes, Rockauto was the one that confused me. I like their prices and they usually ship fast BUT you better know exactly what you’re ordering because they offer ZERO technical help. Not even a phone # to call.
Burning Brakes
Joined: May 2014
Posts: 834
Likes: 67
From: Orlando Florida
vibration
As some of you know, I’ve only had this car a couple of months and I finally got the engine to run decent, but now I’ve got a rather bad vibration in the rear. You can really feel it under moderate to hard acceleration. Cruising down the highway at 65 you’re just barely aware of it.
Anybody got any ideas of what it could be?
Anybody got any ideas of what it could be?
Thread Starter
Le Mans Master
Joined: Apr 2013
Posts: 5,001
Likes: 1,056
From: Arlington TX
2024 C1 of the Year Finalist - Unmodified
2023 Restomod of the Year Finalist
2023 C1 of the Year Finalist - Unmodified
Le Mans Master
Joined: Feb 2008
Posts: 6,508
Likes: 1,927
From: Folsom CA
When it comes to Ujoints I prefer the Spicer/Dana ujoints. If you go to a Driveline repair shop they will normally tell you Spicer is the number one choice.
Neapco or Federal-Mogul are used when Spicer is not available.
I used to rebuild my own but finally determined it was worth their expertise to have them professionally installed and have the shaft balanced. Consistent results that way.
When I did them myself they worked most of the time. For $100 I like them to work all the time. Tell them what rear gear you run so they know how fast the shaft will be spinning most the time.
A 4.11 will spin much faster at 70 MPH than a 3.08 rear gear.
Neapco or Federal-Mogul are used when Spicer is not available.
I used to rebuild my own but finally determined it was worth their expertise to have them professionally installed and have the shaft balanced. Consistent results that way.
When I did them myself they worked most of the time. For $100 I like them to work all the time. Tell them what rear gear you run so they know how fast the shaft will be spinning most the time.
A 4.11 will spin much faster at 70 MPH than a 3.08 rear gear.
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Thread Starter
Le Mans Master
Joined: Apr 2013
Posts: 5,001
Likes: 1,056
From: Arlington TX
2024 C1 of the Year Finalist - Unmodified
2023 Restomod of the Year Finalist
2023 C1 of the Year Finalist - Unmodified
When it comes to Ujoints I prefer the Spicer/Dana ujoints. If you go to a Driveline repair shop they will normally tell you Spicer is the number one choice.
Neapco or Federal-Mogul are used when Spicer is not available.
I used to rebuild my own but finally determined it was worth their expertise to have them professionally installed and have the shaft balanced. Consistent results that way.
When I did them myself they worked most of the time. For $100 I like them to work all the time. Tell them what rear gear you run so they know how fast the shaft will be spinning most the time.
A 4.11 will spin much faster at 70 MPH than a 3.08 rear gear.
Neapco or Federal-Mogul are used when Spicer is not available.
I used to rebuild my own but finally determined it was worth their expertise to have them professionally installed and have the shaft balanced. Consistent results that way.
When I did them myself they worked most of the time. For $100 I like them to work all the time. Tell them what rear gear you run so they know how fast the shaft will be spinning most the time.
A 4.11 will spin much faster at 70 MPH than a 3.08 rear gear.
Thread Starter
Le Mans Master
Joined: Apr 2013
Posts: 5,001
Likes: 1,056
From: Arlington TX
2024 C1 of the Year Finalist - Unmodified
2023 Restomod of the Year Finalist
2023 C1 of the Year Finalist - Unmodified
Removed and checked both halfshafts, U joints are like new so reinstalled them. The more I think about this, the more I don’t like that rear spring. Seems to me it puts those halfshafts at a bad angle, as most of you commented.
My question is, besides that JR spring, how do you get the body high enough to clear the wider tires and not have to adjust the body to frame bolts? Am I overthinking this?
My question is, besides that JR spring, how do you get the body high enough to clear the wider tires and not have to adjust the body to frame bolts? Am I overthinking this?
Last edited by 59BlueSilver; Oct 27, 2017 at 08:39 AM.
Safety Car
Joined: Oct 2016
Posts: 4,617
Likes: 1,547
From: Olive branch Ms
The spring isn't the problem. The spacers being on the bottom are the problem. If you change the spring but leave the spacers where they are the half shafts will still be at the wrong angle.
Thread Starter
Le Mans Master
Joined: Apr 2013
Posts: 5,001
Likes: 1,056
From: Arlington TX
2024 C1 of the Year Finalist - Unmodified
2023 Restomod of the Year Finalist
2023 C1 of the Year Finalist - Unmodified
I think that spring is too stiff anyway so I’m going to change to a new HD one and set the bolts and spacers stock.
Drifting
Joined: Sep 2017
Posts: 1,951
Likes: 748
From: CT
I don't think its the spring as well, set the bolts and spacers to their stock position, do you have a set of spare wheels with tires that you can bolt on to the rear. I really think your vibration revolves around the ride height mixed with the oversize rear wheels and tires, its a cheap and quick test to see if the rear wheels are the problem.
Thread Starter
Le Mans Master
Joined: Apr 2013
Posts: 5,001
Likes: 1,056
From: Arlington TX
2024 C1 of the Year Finalist - Unmodified
2023 Restomod of the Year Finalist
2023 C1 of the Year Finalist - Unmodified
I don't think its the spring as well, set the bolts and spacers to their stock position, do you have a set of spare wheels with tires that you can bolt on to the rear. I really think your vibration revolves around the ride height mixed with the oversize rear wheels and tires, its a cheap and quick test to see if the rear wheels are the problem.
Le Mans Master
Joined: Sep 2003
Posts: 8,812
Likes: 2,029
From: eastern NC
Thread Starter
Le Mans Master
Joined: Apr 2013
Posts: 5,001
Likes: 1,056
From: Arlington TX
2024 C1 of the Year Finalist - Unmodified
2023 Restomod of the Year Finalist
2023 C1 of the Year Finalist - Unmodified
