jeepit;
If there is one thing I have learned, it is to NOT try to convince your wife that YOU need a new truck.
It might work this time, but the next time, you will be screwed out of luck.
Here is that I found works REALLY well to get your new things, and most of all, it's a BETTER way, and much less deviant.
1) Your number one goal should NOT be convincing her that YOU want it, but you should focus on getting HER to want the new truck. Since what THEY want is OK, it absolutely is the best way to go
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You have to make sure you make the "promotional" material VERY available to her in places where she eventually gets bored and reads something for the sake of it.
2) Ask other CUMMINS owners about how pleased they are with their mileage and towing ability
WITH YOUR WIFE PRESENT. This way, it's not just YOUR story. She will think for herself in this way, and start thinking that this
really is the way to go.
3) Have her help you call up dealers looking for older USED Dodge Cummins. Since they usually don't exist (always sold out), the salesman will usually say things like "whenever we get one in here, they're gone within a week". A powerful message from someone OTHER than yourself.
4) DON'T RUSH!!!! If there is ever one thing to foil your plans of a new truck, it's to rush things! In all fairness, it's her investment also. This is why I opt for the above plan. Give her time to gradually LEARN about them, then after some time using the above points, she will actually start to WANT the truck.
I always thought that just trying to cram what we want down our wives throat usually ends up in argument and a BIGGER problem each "next time".
My line of thinking is that it is her investment just as much as mine, so for a big ticket item like this, I would prefer her to actually want what she is buying. I just think it lays the ground for better teamwork, and you will BOTH enjoy the purchase that much more.
My . 02
Shawn