[Gramps]

The part numbers are here. http://www.jeepforum.com/forum/f98/stiffer-springs-lift-extra-load-764262/index2.html#post7124789

[Tyler-98-W68]

Originally Posted by miketmx

Tony wrote: " My 225/65/17 front right tire slightly rubs at full lock to the right, I'd imagine it would do it more if I didn't have a lift."

I don't have a lift; Do you think the tire rubs because of the diameter at 28.5" or because of the width at 225 instead of the OEM 215/65/17. I can buy 225/60/17 Yokohama Geolander AT/S which are 27.6" in diameter in the U.S. but Canada seems to only have 225/65/17.

The rubbing is caused by the overall diameter being biggar. With tires wider than 235 backspacing on the rims becomes important because if there isn't enough the tire will rub against the strut.

I have LT225/75/16 tires 29.3" and they rub only at full lock, its not a big deal.



http://i41.tinypic.com/1zdmavo.jpg

As you can see i'm close to the perch but i Haven't had problems.




If you go with too large of a tire you may have clearance problems there



IN terms of where my tires run here is where (circled)

[ZJTom]

According to the links...

Going to the trail rated springs really does nothing (lift wise)?

[Gramps]

Originally Posted by ZJTom

According to the links...

Going to the trail rated springs really does nothing (lift wise)?

Correct. The lift would be negligible. I believe the fronts are just a different rate. I wouldn't waste my time and money to change out the springs unless they needed replacing and then I'd go with them "just because" but I wouldn't expect much difference.

Tires can also rub because of the tread width compared to the overall width (at the bulge). Generally they are less likely to rub if you can stay with a narrower tread width and the narrower tread is also better in the snow. Choosing the right tread pattern for what you intend to do is more important than trying to gain height buy going with a taller tire. A 1" taller tire is only going to get you a 1/2" extra ground clearance that's why you get some skid plates. A taller tire also increases your final drive ratio, just the opposite of what you're trying to do, gain low end, "around" 29" you're reaching the point of no return.

(Original Tire Diameter / New Tire Diameter) X Original Axle Ratio = Effective Axle Ratio)

Based on the 27.3" standard tire for the FWD and FD I and on 28" standard tire for the FD II this is the change to your 1st gear ratio by going up to a 29" tire.

CVT2 - 14.37:1 / 13.52:1
5 speed - 15.53:1 / 14.61:1
CVT2L - 19.14:1 / 18.44:1

The other points that have been mentioned about the BLD fall under not just the parts involved but also the programming which is according to you VIN code. If you changed out all of the parts necessary to convert an FD I into an FD II you still couldn't get it reprogrammed to work.

Some of the parts needed - CV2L trans, shifter, half shafts, ECM, TCM, trans solenoid (to actuate the BLD) and the different wiring harnesses.

I'm not trying to deter you from making improvements I'm just trying to help point you in a direction that will give you the most bang for the buck.

[Tony1911]

Originally Posted by miketmx

Tony wrote: " My 225/65/17 front right tire slightly rubs at full lock to the right, I'd imagine it would do it more if I didn't have a lift."

I don't have a lift; Do you think the tire rubs because of the diameter at 28.5" or because of the width at 225 instead of the OEM 215/65/17. I can buy 225/60/17 Yokohama Geolander AT/S which are 27.6" in diameter in the U.S. but Canada seems to only have 225/65/17.

Most likely it is a combination of the width and height. My situation seems fairly unusual, as generally speaking people have declared 225/65/17 an universal no-rub fit, even without a lift.

I wouldn't worry too much about it though. The right front tire only rubs at full lock, backing off just a tiny bit is enough to stop it. To give you a better understanding of the situation, here's a few photos of where the tire rubs against the wheel well:





(I suppose one of these years I really ought to take a hammer to that, to stop the rubbing for once and all. I would need a better way of lifting the Jeep up than what I have available, though. And since it really is no big deal, I haven't really bothered with it.)