shortround Posted April 7, 2011 Posted April 7, 2011 I have a 86 jeep comanche that started as a 4cyl and i changed the motor and drivetrian to a i6 lifted it 4.5 in. Now when i hit a bump above 35 the right front wheel will bounce and vibrate the hole truck. I can't find anything wrong. i checked for play in the ball joints and the wheel bearing. Nothing. It will happen then go away then come back. i don't know where to look. Any suggestions?
Pete M Posted April 7, 2011 Posted April 7, 2011 how did you lift it? which kit or what parts did you use?
shortround Posted April 7, 2011 Author Posted April 7, 2011 i just replace the coils and shocks and a new drop pittman arm. i drive great for week then its started to vibrate.
Pete M Posted April 7, 2011 Posted April 7, 2011 that's about 1/3rd of the parts necessary to properly lift an MJ that high. You still need longer control arms, longer track bar, longer sway bar links, longer brake lines, (and lose the drop pitman and put the original back). :thumbsup:
shortround Posted April 7, 2011 Author Posted April 7, 2011 well the sway bar I'm going to leave disconnected the brake line i built new mounts for them and the control arms look fine the coil is still strait and compresses fine. but i don't think any of this thing would cause the front right wheel to bounce.
littlezeeker Posted April 7, 2011 Posted April 7, 2011 or you can use comanche control arm drop kit some ways better some ways worst all depends on how you plan to use your truck
shortround Posted April 7, 2011 Author Posted April 7, 2011 My plans for the jeep is to use as a daily drive and weekend mudder. The front supension works great other then the bounce i get.
Pete M Posted April 7, 2011 Posted April 7, 2011 well the sway bar I'm going to leave disconnected . that's not safe in the event of an emergency.
shortround Posted April 7, 2011 Author Posted April 7, 2011 yeah i know but i drove my last jeep for a year with out it and did fine. I hardly ever take it on the highway where the sway bar come into acount.
87Warrior Posted April 7, 2011 Posted April 7, 2011 I won't debate the swaybar issue, but you should really have one up front. How are your tie-rod ends? How was the trackbar bushing at the pasenger side? Are you SURE that trackbar is tight? How are the control arm bushings? Any cracks or the bushing not sitting centered? What is your caster? Pinion angle? Driveshaft angle? How did you check the hub and ball joints? I think this bounce/vibration is a worn out bushing flopping around under the right conditions. You are putting a lot of extra stress on old worn out components.
shortround Posted April 8, 2011 Author Posted April 8, 2011 I checked for extra play in the passanger tire by trying to move it the tire when i had it on jack stands but nothing seemed to have a lot of play and the panard bar is tight i know that. There is no front drive shaft right now i don't havethe money to pick it up from the shop that shortened it for me.
dakal Posted April 8, 2011 Posted April 8, 2011 i had a dynamic balance done. the almost brand new tire on the passenger front was so bad it couldn't balance within specs. his recommendation was buy a new one, or change to the back of the truck. the vibration went away when i took it off the truck and replaced it.
Pete M Posted April 8, 2011 Posted April 8, 2011 can you snap some photos of what all you've got going on?
mnkyboy Posted April 8, 2011 Posted April 8, 2011 Sounds like your drop pitman arm has thrown off the geometry of the track bar or the track bar is worn out. I would put the stock pitman back on. Why did you put a drop pitman on anyway?
mj Mike Posted April 8, 2011 Posted April 8, 2011 How are your tie-rod ends? How was the trackbar bushing at the pasenger side? Are you SURE that trackbar is tight? How are the control arm bushings? Any cracks or the bushing not sitting centered? What is your caster? Pinion angle? Driveshaft angle? :agree: i had a dynamic balance done. :smart:
juan Posted April 9, 2011 Posted April 9, 2011 check the steering box mount area and bolts...mine has a lot of play and needs to get reinforced. Have someone move the steering wheel back and forth and check for play.
shortround Posted April 12, 2011 Author Posted April 12, 2011 I think i have solved it but thanks for the advice. I took it in to a friend to get a alignment done and said it was either the shock or the steering dampner. So i replaced the steering dampner and sloved it. i will add a photo if someone can help me figure out how to add a photo on this thing.
mj Mike Posted April 13, 2011 Posted April 13, 2011 link: How to: Uploading your photos into posts. http://comancheclub.com/forums/viewtopic.php?t=11077 Testing Area: Uploading your photos into posts. viewforum.php?f=5
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