I forgot one issue. There is a Brake proportionate valve. Check it. Iam not sure that GP has brake proportionate valve or not. FIAT UNO has this valve. if yes then it may be culprit. Generally this valve is neglected while solving any brake problem. We only gives attention to brake Pad,liner,booster,brake fluid & brake bleeding etc. But this valve plays important role in braking system of car. So check it. & play one more gamble. Replace it on your own cost. BTW Iam also facing brake problem of my M Dzire VDi. Even I apply brake gently,brake grabs & lock the front wheel. ::OO :A Maruti has not solved my problem of too much urgent braking. I showed problem thrice times.But SA & technicians of Maruti denys the problem. They gives funny & irresponsible answers as follows. " Sir at front there is Disk brake. So there is urgent brake. & at Rear there is liner brake.So at rear there is less braking power" :A ::OO As it they assume that I am a owner of TATA NANO,who has purchased 4 wheeler for the first time in life. Problem of my GP has not been solved. I wrote approx.100 mails to FIAT & TATA. But nobody is taking interest to solve my problem. All FIAT & TATA people blames to fuel quality. I don't understand that if other owner's GP are running fine on the same quality of fuel then why mine is not ? My Dzire also gives huge Turbo lag due to bad fuel. If GP has better drivability than Swift,then GP should better drivability even there is bad fuel. Isn't it ? Iam not able to judge that if this problem is due to bad fuel OR is there is any problem in my car? Sorry for being OFF TOPIC.