"Does lack of sales qualify for a reason?"
Well, that would be a good reason, but when we are comparing 8000 Liberty CRD's being sold all year (versus 166,883 total), I can't see how we are talking high sales anyway. Not to mention a Rubicon is not the same as a CRD engine: adding a locker or an axle is not the same, costwise or difficulty level, as swapping a motor/tranny out. We should find some TJ owners and ask if they would rather buy a diesel Wrangler non-Rubicon 4x4 or a gas Rubicon. I think the response would sway to the diesel, but it would be nice to have some hard evidence of how many would be interested. It would seem much cheaper to swap out suspension and gearing than the motor/tranny. Which, as you correctly point out, is probably why DC did not do it. However, I would think you could sell more CRD Wranglers than the 8,000 units of Liberties sold last year-- if the price difference between CRD and gas were roughly the same on the Wrangler line as it is on the Liberty line. Since they sale fewer Wranglers to start with, the percentage of diesel to gas would also be much higher. I could see it approaching 35% CRD sales on the Wrangler line easy. I don't think you will get as high a sales percentage, or numbers, on the Liberty.
If you do get that high of numbers, as it stands today-- you will get alot more complaints about the bugs than you would with the Wrangler folk, which is part of my point. If DC wants to see the response of normal folk driving a diesel, it had better work right from the start. I don't see soccer moms happy with the Libby CRD at this point. The first time it would start doing the transmission studder or go into limp mode and stop on them when the EGR dies-- it would be sold and they would bad mouth the thing to no end and generate all sorts of negative press about it. You can forget about them having anything nice to say about it if they have to take it back to the dealer 4 times in a couple months when it has less than 10,000 miles on it. I am afraid that the CRD introduction with the Libby is going to backfire on DC if they don't fix the bugs and it is going to be like GM diesels in the 80's all over again. I am even more afraid that there are people inside DC that want it to fail, so they can win their political victories (knowing corporate politics). The ball joint is another time bomb of bad publicity. It is the next Firestone Tire fiasco waiting to happen, but the oil in the intercooler and EGR valve are not much better.
Hope your right though, and DC knows what they are doing, for their sake. I wonder if another reason they may not have choosen the Wrangler may be limited production-- they may already be producing as many of the CRD's as the factory in Italy can churn out. I assume demand in Europe is still strong. Perhaps they are gearing up production before they can support larger scale sales that could occur with a Wrangler CRD introduction. Waiting for the new Wrangler is also a good point, I had forgot about the new model introduction. I am sorry to see they did not come out with the CRD as an option for the new Wrangler at its introduction, however. It would have been a great move to placate many that are upset over the elimination of the proven low-end torque producing in-line 6.
As for the low sales, I am certainly not privy to those figures, but in AZ, Rubicon's and Unlimited are everywhere. I see at least 4 Ruby's a day driving around (and not the same four), most days more. I see a Unlimited at least once a week and they have only been out a year. Of the Wranglers that I see that are not Ruby's, most have serious lifts. Of course, I can see that more ruby's and unlimited's are sold in AZ than elsewhere (but the same holds true for Wranglers, for that matter).
Anyway, I neeed to rant, but now I feel better.
