2004 100 series TD IFS lift

2004 100 series TD IFS lift

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G'day all, Long time reader first time caller. I have an 04 100 series TD on diesel/gas. I bought it to replace a 60 series TD due to the towing limit required to drag along a new purchase of a 7 metre powered catamaran, About 3200kg plus gear thereabouts. Trips range from runs to the local boat ramp to trips up north (WA) 1200-1600 km each way. I needed some lift so installed polyair bags, with minimal effect. I went back to my local suspension workshop and told him of this and instructed him that i would like to keep a reasonable level of comfort in the rear(not too firm a ride whilst not towing) did not want to sacrifice off road ability, and assist air bags in keeping car from dragging its bum up the road whilst towing my cat. He advised on a lift using springs, 1 stage higher than standard and we went ahead with that. It raised the car a little over 2". During the test drive it became evident that it had lost the steering ability to self straighten. Whereas normally from full lock the car would straighten it would instead do circles until manually steered in forward direction. Mostly when turning left but occassionly occurs when turning right. After adjusting the caster angle in the front, it occured less frequently but still happens in both directions which sometimes catches me by surprise. My suspension specialist is out of ideas and his answer is to replace back to my original springs and wipe his hands of all 100 series IFS models. If anybody out there has had this problem or knows any way to rectify this problem, I would be most appreciative. Thanks in advance, Hawk1