Am I SOL?

[Jurfie]

So, I bought my JKR new in 2014. Searched all the local dealers at the time for the features I wanted; one being 4:10 gears because I eventually wanted to go to 35s. Well, my stock KM2s are finally worn enough to justify the expense of a lift and new KO2s to my Financial Manager. Oh happy day! Or so I thought. ?

I just pulled the build sheet online and, lo and behold: it says I’ve got 3:73s.

“Hmmm...” methinks; “...that’s not right.” So I dig out the window sticker from when I bought it; it says 4:10s. ******? VIN is correct on the window sticker, so it wasn’t mixed up at the dealer. I’m not going to crack the pumpkin to check, so I do the ol’ tape-on-the-tire-and-driveshaft trick and count rotations. It doesn’t do 4 full rotations, so I’m 95% sure I’ve got 3:73s. Muddafuggah! ?

Do y’all think I could go back to the original dealer and see if they would do anything? Or am I SOL given that it was 5 years ago? I’m thinking the latter.

Re-gear isn’t in the budget, so I either go with 33s or hope that the 35s will be fine with the 3:73s.

Sonuvabish. ?

 

[dreadlocks]

Its called a Monroney Sticker, and there are potential fines that can be given if they are altered illegally.. they are supposed to be generated from manufacturer build sheet, so if it dont match.. perhaps you can call shenanigans? dunno IANAL.

 

[shade]

Mount whatever tyres you want and drive it. If you decide regearing would be worth the cost, save for it and do it. I doubt running 35s will make your Jeep undriveable while saving.

If you decide to regear, whatever you can work out with the dealer may help with the cost, but it has nothing to do with the performance of your Jeep.

 

[Superduty]

I think you have a good argument for Jeep to regear for you. You didn't get the product you believed you were getting. False advertisement or fraud on their part.

The question is whether too much time has passed. I don't know the answer to that. It may have something to do with when a consumer is expected to discover the discrepancy. Bring that it's inside the diffs, the discovery could be anytime they actually find it.

Sent from my SM-G973U using Tapatalk

 

[Zeep]

Its called a Monroney Sticker, and there are potential fines that can be given if they are altered illegally.. they are supposed to be generated from manufacturer build sheet, so if it dont match.. perhaps you can call shenanigans? dunno IANAL.

According to your link, fines are only $1000. That's cheaper than a re-gear. Plus, by the time the legal system drags out, the Jeep could be worn out!
I personally would investigate all legal options. Just wouldn't get my hopes up.

 

[Jurfie]

Thanks for the replies everyone. I’m in Canada, so I’m not sure if the Monroney Sticker fines apply, but it gives me a good starting point.

The plot thickens! ? Following the rabbit hole trail of links and searches regarding this, I found another link to generate the window sticker rather than the build sheet. It also states I should have the 4:10 gears, so I’m getting conflicting information, both directly from Jeep (note the website address in the screenshots below).

Screenshot of Build Sheet; this is under “Standard Equipment” and there is no reference to 4:10 gears under “Optional Equipment”:



Screenshot of Window Sticker (under “Exterior Features”):



Would the trailer tow group option have replaced the gears? I can’t seem to find anything online other than the Max Tow Group on non-Rubicons, which doesn’t apply in this case.

 

[Jurfie]

And I just realized I keep typing “4:10” when I should have been typing “4.10”. Derp, newb. ?

 

[NatersXJ6]

The difference between 3.73 and 4.10 is pretty small in the method you are using to measure it. Are you 100% sure you are right? I would pull the covers (both) clean, inspect, photograph, and then decide if you should get worked up. Start with the dealer, explain the problem, and ask what they can do to help you. Asking usually gets you much farther in life than threatening. Especially if they understand the consequence of what you could threaten and think you don’t know yet.

 

[Buliwyf]

3.73 are standard with autos, 4.10 with manuals, last time I checked. Auto Rubi? Yuck. I don't see the $800 4.10 option, under the options list. The auto trans option, might have overridden the 4.10 listed under standard equipment, and bumped you back to 3.73. Can't the trailer tow pack option, bump you back to 4.10's?

But like others have said, do what you're going to do, regear waaay beyond 4.10 if you feel the need to. If avoiding regearing at all cost, stick with 33" tires. I doubt you'd be happy with 4.10/35's in a Jeep.

If automatic trans, just set parking brake, put in drive to remove slop. Put a ziptie on driveshaft. Gas it to drive forward while someone watches the shaft.

Does your ECM have a gear setting like a Ford? Scan it and check what it says. But be aware, sometimes incorrect gear settings, and incorrect tires settings are purposely entered, to tune the speedo accurately.

 

[jadmt]

if you you only turned the rear wheel 1X that is not enough. jack it up again and turn one of the tires a full 10 rotations while counting the driveshaft rotations. 3.73 on a 2 door will feel fine as long as you are not loaded/built heavy and if you have an auto you won't hardly notice a difference. make sure you calibrate the speedo if auto so your shift points are correct.

 

[jadmt]

I just read his window sticker and he does not have 4.10's. the sticker shows what is standard and by optioning the auto he needed to have 4.10's as an option and it did not happen. Trailer tow will not get you 4.10's as jeep says 3.73 and 4.10 tow the same amount.

 

[Grenadiers]

Back in the day, Dana 44’s had a tag on the cover indicating ratio. Also to the right, a bill of materials was indicated on the axle tube, including ratio. Not sure on your truck, but it wouldn’t hurt to look!

 

[jadmt]

Back in the day, Dana 44’s had a tag on the cover indicating ratio. Also to the right, a bill of materials was indicated on the axle tube, including ratio. Not sure on your truck, but it wouldn’t hurt to look!

nope dana used on jeeps has not done that since at least 2012. Not sure why as it only makes sense to tag them which probably why they don't.

 

[Jurfie]

I just read his window sticker and he does not have 4.10's. the sticker shows what is standard and by optioning the auto he needed to have 4.10's as an option and it did not happen. Trailer tow will not get you 4.10's as jeep says 3.73 and 4.10 tow the same amount.

Well, that's not what was presented by the dealer; wish I still had the original ad as it definitely said 4.10s were included. I know the trailer tow package does not include the 4.10s, I just didn't know the auto option changed them out for the 3.73s; that should be noted on the sticker, IMO. Grr...I guess I'm SOL after all. Caveat emptor, and whatnot.

Oh well screw it; I'm putting 35s on it anyways. I'll definitely re-calibrate the speedo via Flashcal and see how it goes.

Thanks everyone for the replies and suggestions! ?

 

[shade]

I just didn't know the auto option changed them out for the 3.73s

That's because the AT & MT are geared differently, which is why I suggested mounting what you want and see how it drives before fretting about regearing.

I've had this come up a few times over the years when Jeep folk were touting how much better their truck was than my Non-Jeep simply because theirs had "4.10 gearing". I don't know anything about it, but it sounds cool, so all off-road vehicles should have 4.10 gearing, right?

4.10 can work well on a Jeep, but what's important is how an engine and all of the gearing works together with the tyre circumference. 4.10 isn't a magic, universal ratio that works for everything, and it would be unsuitable for my truck. It may be perfect for yours, or another ratio may be better. Mount those 35s and see how it goes. You may find that the new tyre circumference, weight, and height of your Jeep makes it prefer a new ratio, but you'll be better off finding out what ratio you need once you get the rest figured out.