I recently bought a 1991 khyber , its back tube was crooked and tyre was out of its position but i got it weld and it got fine . Not the problem the back bumper is colliding with the tyres and making noises . I am a first time car buyer and a student too , bought this car by my own savings . engine and suspension is just perfect . .Let me know what could be the problem and what is the solution too . Estimation will be great too as i don't want to get overcharged by the mechanics