Rear caster
Thread Starter
Le Mans Master
Joined: Aug 2015
Posts: 6,884
Likes: 2,887
From: Toronto
Rear caster
Ive searched but I cant find an answer to this.
For those of you that have been to a shop with the Rear Caster tool (or DYI setup), were you out of alignment? I had an alignment done at a great reputable shop. They didnt have the tool on hand and i didnt have time to wait. They are fully aware of rear caster on the vette and viper. Rear tire wear looks good. Not sure if its worth going back.
For those of you that have been to a shop with the Rear Caster tool (or DYI setup), were you out of alignment? I had an alignment done at a great reputable shop. They didnt have the tool on hand and i didnt have time to wait. They are fully aware of rear caster on the vette and viper. Rear tire wear looks good. Not sure if its worth going back.
Race Director
Joined: Oct 2008
Posts: 17,982
Likes: 1,074
From: Lansing MI
So when you adjust camber you will likely change caster. Therefore it ought to be checked during the process.
Its probably not worth returning to the shop, as long as the car drives properly.
Caster is not a tire wear angle.
Its probably not worth returning to the shop, as long as the car drives properly.
Caster is not a tire wear angle.
Burning Brakes
Joined: Aug 2001
Posts: 837
Likes: 388
From: Olathe KS
Mine was positive on one side and negative on the other which, while still in GM's wiiiiiide spec, could've cause some snap oversteer in a fast corner so I'm glad I got it checked. I'm not sure if it was that way from the factory or if the first dealer I took it to inadvertently set it that way when adjusting the rear camber (which was out of spec from the factory) because they didn't actually have the rear caster measurement tool. I asked, they said they did thinking I didn't know what I was talking about.
I ended up finding an independent shop that a lot of local weekend scca guys use with their vipers, 911s, Vettes, BMWs, Miatas, etc... He actually machined one for himself years ago for all of his C7 customers and set mine exactly where I wanted it. Took him an hour and cost $150. The dealer wanted me to pay $350 for them to rent the tool from GM and try again with the rear caster alignment - I quickly said no thanks. I've since found another local dealer that sells fewer C7s with a decent tech who can actually align the rear caster but they are just too expensive.
I ended up finding an independent shop that a lot of local weekend scca guys use with their vipers, 911s, Vettes, BMWs, Miatas, etc... He actually machined one for himself years ago for all of his C7 customers and set mine exactly where I wanted it. Took him an hour and cost $150. The dealer wanted me to pay $350 for them to rent the tool from GM and try again with the rear caster alignment - I quickly said no thanks. I've since found another local dealer that sells fewer C7s with a decent tech who can actually align the rear caster but they are just too expensive.
Burning Brakes
Joined: Apr 2019
Posts: 881
Likes: 257
From: Phoenix, AZ
I personally want to guarantee mine is good and would advise others too. I am a strong supporter of alignments being a major factor on how a car drives. However, in actuality, you shouldn't have to worry in 99% of driving. If the car doesn't feel unusually unstable in corners, you are likely okay.
Melting Slicks
Joined: Jan 2004
Posts: 2,299
Likes: 387
From: Fort Worth TX
St. Jude Donor '14-'15
