Post to the EFV-8 Forum
Post Classified Ads
Shop the Online Store

User Login

Not Registered Yet? Click Here to Sign Up!

Early Ford V-8 Club Forum

FORUM RULES: Users agree to these Rules when using Forum.

The site administrator reserves the right to change the terms and conditions of the user agreement without prior notice to the user. It is the responsibility of the user to regularly review the terms of this agreement.

The user agrees to the following terms:

All information that you provide to us for your membership is correct.
You will not use your membership to spam, harrass, or exploit other members in any way.
Vulgar, Abusive, Racist and Sexist Language will not be tolerated.
Commercial-type sales postings will not be allowed.
No mass posting or flooding of the boards is allowed.
No Advertising of parts or cars; no Ebay or business/commercial ads (please use the "Classified" for ads Wanted or For Sale).
VIEWING MULTIPLE TOPICS ON SCREEN: You can choose to see more than 10 Topics at a time ... Log In and choose "Preferences" from the top bar on the Forum page. Scroll down and Change the "Default Topics Returned" parameter to 25 or 50, and save the changes. Since this setting is stored in your browser 'cookies' (if enabled), it seems to use that stored value even if you are not logged in. So, if you use a PC that you haven't logged into the forum from, the setting still seem to remain at the default.
EXTERNAL PHOTO LINKS ON FORUM: You can still use external photo links in your posts on the new forum. They follow the rules of any link in that they have to have the URL link qualified down to the full image file name (example: .jpg). The links will open in a new browser window, the same as an uploaded image attached to a post. Since an image attachment to any post does not display inline with the post, the results are the same. You can use multiple external links within a post. This link is from photos on a site from Don Clink's 'Deuce@75' albums:

http://donclink.com/deuce_75_1/images/dscn2950.jpg

Using links from photo sites such as Photobucket can help in "size" issue with uploaded attachment files. For best viewing in web browsers, photos should be around the 800x600 pixel range, and probably not more than 1024x768. Most cameras today store HUGE jpg image files, as the default settings are in the 7, 8, 10, and 12Mb image sizes. The image files that are then attached are very large, and the browser can't display the full image size without using the scroll bars. Use the re-sizing functions of your photo editing software to reduce the image to 800x600, which reduces the file sixe and the image load time in the browser. Don uses Google's free Picassa3 software, which is an excellent photo management product. All of the photo albums of the Deuce, Grand National, and Auburn that are links on the NORG site were built using Picassa's web creation functions. And it's free? (THANKS to Don Clink for the info!)
HOW DO I SHOW MY EMAIL ADDRESS ALONG WITH MY USERNAME? You can LogIn on the Forum, and select PREFERENCES. On this page Members can add optional information such as their City,State, Country; Occupation; Hobbies: list a Homepage; list AOL Instant Messanger Handle; Signature; "Make Email Address viewable to others;" and even change the number of Default Topics shown on a page. WHEN others click on your profile, they will see this information.

EFV-8 Club Forum / General Mercury Discussion / Right rear wheel hop above 55 mph

Reply to Discussion | New Discussion

<< previous || next >>

Posted By

Discussion Topic: Right rear wheel hop above 55 mph -- page: 1 2

supereal

09-05-2014 @ 2:23 PM

reply profile send p.m.

Senior
Posts: 6819
Joined: Oct 2009

Glad you solved it, Steve. When I had problems with Coker tires, they tried to tell me it was my fault as I didn't know how to install them. The shop that installed them has been in business since 1930, and really know their stuff. After I unloaded on Coker, they did replace the two faulty tires, and all was well. I know they are a good company, but no one should have to arm wrestle with a surly phone rep. I wonder if Corky Coker knows about this problem?

cliftford

09-05-2014 @ 8:18 AM

reply profile send p.m.

Senior
Posts: 845
Joined: Jan 2014

Glad you solved yout problem. All of this proves two things. 1. Two{or 3 or 4] heads are better than one. 2. On line diagnosing is far from an excact science. It is more like a trial and error process. Good luck, Gene

len47merc

09-05-2014 @ 7:53 AM

reply profile send p.m.

Senior
Posts: 1165
Joined: Oct 2013

You all deserve the credit - glad we all solved my problem.

Steve

TomO

09-05-2014 @ 6:42 AM

reply profile send p.m.

Senior
Posts: 7243
Joined: Oct 2009

Glad you solved your problem.

Tom

len47merc

09-04-2014 @ 11:46 AM

reply profile send p.m.

Senior
Posts: 1165
Joined: Oct 2013

UPDATE - Well, looks like a combination of issues at play here. First of all though, the rear bearings and axle/hub chases were checked and mic'd and found to be true, without pitting and within acceptable tolerance. Also, the axle was validated as not being cracked and/or bent. The bearings, bearing surfaces and axle were all checked with a micrometer and dial indicator. Thanks Gene and supereal for your thoughts here - I should've been more robust earlier in the restoration and it was good to take the time to validate this (glad no issue was found as well).

So here we go. Tom & carcrazy, balancing the wheel on the car solved ~75% of the problem, so apparently when I had the drums turned this resulted in an out-of-balance condition on the right rear only (all drums are the originals). The right rear tire by itself was balanced, but back on the car and spun up to 70-80 mph produced a more than noticeable vibration. After balancing on the car it is very smooth now. Thanks Tom & carcrazy.

Secondly, when installing the tires originally the installer verified the lateral and radial run-out as within spec. Both tires now on the front ARE within spec, but both now on the rear are outside of the spec limits per Coker. Disappointed in the original installer after finding this out and depending upon their information so am moving back to my old-schooler for the future on these bias-plys. Supereal - you pegged this aspect - thanks.

Rotated all tires front-to-back and back-to-front and now the rear axle, with tires/wheels now balanced on the vehicle, is rock solid/dead still at 55-60 mph and even up to a short burst to 75 mph, so the on-car balancing combined with round(er) tires solved it. Now for the tires with radial run-out out-of-spec...

Coker is standing behind their product and are sending me two new tires based on the out-of-spec condition for both. Very frustrating to say the least.

Thanks to you all for your great advice and support.

Steve

len47merc

09-01-2014 @ 4:55 PM

reply profile send p.m.

Senior
Posts: 1165
Joined: Oct 2013

Thanks supereal - will give this and the other recommendations all thorough examinations if the on-car balancing of the wheel/hub/drum does not address the issue. I have both a dial indicator and an original hub puller so this should be relatively easy if these next steps prove necessary. Update later this week.

Steve

supereal

09-01-2014 @ 2:19 PM

reply profile send p.m.

Senior
Posts: 6819
Joined: Oct 2009

Thanks for the update. I suppose it is possible that the right rear axle end is slightly bent. I'd pull the drum and hub and give the end of the keyway a close look, and check it with a dial indicator. Generally, if the axle has been stressed, there will be a crack in that area. My '47 will run at 70 and above in overdrive, but I seldom exceed 50-60 on the highway unless necessary. I used to get wheel tramp with my old tires, as they flat spotted even after sitting overnight. The new Coker bias plies did away with the problem.

len47merc

09-01-2014 @ 5:48 AM

reply profile send p.m.

Senior
Posts: 1165
Joined: Oct 2013

Agree with your logic supereal and appreciate your peeling the layers off the onion here. To clarify further, both this set of tires and the previous set, which were new as well, begin/began hopping at ~57 mph on the right rear only, even after swapping right-to-left and front-to-back. So now I've two sets of new tires exhibiting the same behavior on the same right rear location regardless of which of 6-8 tires were put on the right rear. (Btw - Coker replaced the first set under warranty for a completely unrelated issue)

My search for a brake drum & hub balancer have not yielded a source so as noted earlier the plan is to have the entire wheel/hub/drum balanced on the car later this week. Hoping for a positive result with this effort.

Thanks again supereal and to you all for your knowledge and support here.

Steve

supereal

08-31-2014 @ 4:21 PM

reply profile send p.m.

Senior
Posts: 6819
Joined: Oct 2009

Balancing on a machine usually detects only tires that are seriously affected. If the problem is in the carcass, such as the belts below the tread, it isn't always possible to find. This was the problem with my Coker tires. It isn't always known that an out of round or out of balance tire will affect the vehicle on either the front or back position. As you mention the tires are new, it seems obvious the problem is tires, if the "hopping" didn't occur with the old tires. A very small amount of radial deviation, not the tires, but the measurement between the hub and the tread, can produce the speed related vibration, as will a small out of balance . We see this when we balance flywheels and drive shafts at our machine shop.

len47merc

08-30-2014 @ 5:46 AM

reply profile send p.m.

Senior
Posts: 1165
Joined: Oct 2013

Thanks supereal - as noted in the first post above these new bias-ply tires have been checked during balancing, rechecked during trouble-shooting and validated for lateral and radial run out under pressure all around and are well within spec. Rotating the tires side-to-side and front-to-back does not affect wheel hop on the right rear beginning at ~57 mph. Am taking the car next week to have the right rear wheel/hub/drum balanced on the car by an old-schooler with the equipment to do it. Will update then.

Steve

<< previous || next >>

PAGE: 1 2

NOTE: YOU MUST BE A REGISTERED USER AND BE LOGGED IN TO POST (and reply to) messages in this forum. If you are a first time user, please click the CREATE A NEW ACCOUNT in the masthead above to register and Log In. After that, all you do is LOG IN to enjoy using this site.

DISCLAIMER: The V-8 Club does no independent testing of any of the opinions, thoughts or suggestions presented in the website on the Forum, in the Tech Tips section, or any section. A reader should consider the website to be a forum wherein differing solutions to a particular set of circumstances may be discussed. Ultimately, the selection of an item for an individual's vehicle must be based upon the independent study of the vehicle owner in consultation with people in the hobby and restoration experts.

Early Ford V-8 Club Forum

Merchandise Questions

Membership Questions