jmalkw Posted December 23, 2011 Report Share Posted December 23, 2011 I have a 1994 cadillac deville 4.9. And everytime I hit a bump , the whole back end sways hard. It feels like the car wants to turn sideways sometimes. I was told it could possibly be bad bushings, but I wanted to get the experts opinion. Or somone who had a similar problem. Link to comment Share on other sites More sharing options...
Ranger Posted December 23, 2011 Report Share Posted December 23, 2011 Have the rear suspension inspected. If all is well have a 4 wheel alignment done. Link to comment Share on other sites More sharing options...
BodybyFisher Posted December 23, 2011 Report Share Posted December 23, 2011 This is typically due to the rear knuckle bushings being bad. Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
lothos Posted December 23, 2011 Report Share Posted December 23, 2011 If I'm not mistaken you can buy those rear bushings separately now, instead of buying the whole rear knuckle? WARNING: I'm a total car newbie, don't be surprised if I ask a stupid question! Just trying to learn. Cheers! 5% discount code at RockAuto.com - click here for your discount! Link to comment Share on other sites More sharing options...
rockfangd Posted December 23, 2011 Report Share Posted December 23, 2011 very common. easy to check ,and not bad to change. leave th car on all 4 wheels and pull in and out at the top of the rear tires. if it clunks and has play they are typicaly bad. I did one or 2 writeups on these and amazon seems to be the cheapest for them. They come as a set per side. one set comes with upper, smaller, and installation sleeves. I might add it causes one heck of a sway over bumps, and alot of times clunking noise can be heard. Did them last year on 3 devilles and all 3 took under 3 hours complete. GM FAN FOREVER Nice, clean, luxury= fine automobile Link to comment Share on other sites More sharing options...
jmalkw Posted December 28, 2011 Author Report Share Posted December 28, 2011 Ok so I went to tire barn and they did a free suspension check for my car, and it was indeed the knuckle bushings on the rear. They gave me a nice price to fix it, plus a discount on a allignment. Thanks everybody for the help. Link to comment Share on other sites More sharing options...
rockfangd Posted December 28, 2011 Report Share Posted December 28, 2011 great. the ride quality improves 200% when the worn bushings are replaced. nice to hear you got it fixed GM FAN FOREVER Nice, clean, luxury= fine automobile Link to comment Share on other sites More sharing options...
jmalkw Posted December 28, 2011 Author Report Share Posted December 28, 2011 Thanks. I will be getting it done by the weekend. I'm looking foward to floating again. Link to comment Share on other sites More sharing options...
rockfangd Posted December 28, 2011 Report Share Posted December 28, 2011 sorry misunderstood. thought you had it done already. It shouldnt be bad at all. One thing I cant stress enough on is the long bolt for the lateral arm on the rearward side of the knuckles must be tightened with the suspension at ride height otherwise it will flex too much when the car is at ride height and tear the bushing. I use a jack oncee everything is together to jack the corner to ride height then tighten the bolt. then lower the jack. Easy to do and never had an issue yet. Surely someone else will chme in on this GM FAN FOREVER Nice, clean, luxury= fine automobile Link to comment Share on other sites More sharing options...
BodybyFisher Posted December 28, 2011 Report Share Posted December 28, 2011 If I'm not mistaken you can buy those rear bushings separately now, instead of buying the whole rear knuckle? Yes, thank heavens someone came up with a solution Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
BodybyFisher Posted December 28, 2011 Report Share Posted December 28, 2011 sorry misunderstood. thought you had it done already. It shouldnt be bad at all. One thing I cant stress enough on is the long bolt for the lateral arm on the rearward side of the knuckles must be tightened with the suspension at ride height otherwise it will flex too much when the car is at ride height and tear the bushing. I use a jack oncee everything is together to jack the corner to ride height then tighten the bolt. then lower the jack. Easy to do and never had an issue yet. Surely someone else will chme in on this Very good advice about tightening the pivot point bolts at ride height! (Hmmm, I am almost at 20,000 posts, now that is scary!) Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
Texas Jim Posted December 28, 2011 Report Share Posted December 28, 2011 sorry misunderstood. thought you had it done already. It shouldnt be bad at all. One thing I cant stress enough on is the long bolt for the lateral arm on the rearward side of the knuckles must be tightened with the suspension at ride height otherwise it will flex too much when the car is at ride height and tear the bushing. I use a jack oncee everything is together to jack the corner to ride height then tighten the bolt. then lower the jack. Easy to do and never had an issue yet. Surely someone else will chme in on this Very good advice about tightening the pivot point bolts at ride height! (Hmmm, I am almost at 20,000 posts, now that is scary!) Work at it hard and you can go over 20K by the weekend... Link to comment Share on other sites More sharing options...
KHE Posted December 28, 2011 Report Share Posted December 28, 2011 sorry misunderstood. thought you had it done already. It shouldnt be bad at all. One thing I cant stress enough on is the long bolt for the lateral arm on the rearward side of the knuckles must be tightened with the suspension at ride height otherwise it will flex too much when the car is at ride height and tear the bushing. I use a jack oncee everything is together to jack the corner to ride height then tighten the bolt. then lower the jack. Easy to do and never had an issue yet. Surely someone else will chme in on this Also, it is a good idea to use blue Loctite on the lateral arm bolt since there is evidence of a threadlocker on the OEM bolts. The shop manual says to replace the bolt but it is no longer available. Kevin '93 Fleetwood Brougham '05 Deville '04 Deville 2013 Silverado Z71 Link to comment Share on other sites More sharing options...
BodybyFisher Posted December 28, 2011 Report Share Posted December 28, 2011 sorry misunderstood. thought you had it done already. It shouldnt be bad at all. One thing I cant stress enough on is the long bolt for the lateral arm on the rearward side of the knuckles must be tightened with the suspension at ride height otherwise it will flex too much when the car is at ride height and tear the bushing. I use a jack oncee everything is together to jack the corner to ride height then tighten the bolt. then lower the jack. Easy to do and never had an issue yet. Surely someone else will chme in on this Very good advice about tightening the pivot point bolts at ride height! (Hmmm, I am almost at 20,000 posts, now that is scary!) Work at it hard and you can go over 20K by the weekend... HaHa....maybe if we have a political discussion, I'll see if I can muster up something to say, I think I can post 200 times on the subject by tomorrow, but that would be unfair.... Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
rockfangd Posted December 29, 2011 Report Share Posted December 29, 2011 I have not replaced the bolts on the ones I have done due to the bolt not being available. also have not used loctite but it helps. I didnt understand why they say to replace the bolt as long as it is in good shape. I realize it holds a bit of a load but all of them used the same bolt and it is discontinued. I do believe the 99 Deville was slightly different somehow. It might come to me. GM FAN FOREVER Nice, clean, luxury= fine automobile Link to comment Share on other sites More sharing options...
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