Stealership just told me it would void my warranty if

[JohnnyUtah]

I Regear.
I have a 2020 Mojave that came stock with 33 inch MTs and 4.10s.
I have 35s on order so I went ahead and sold those stock 33s to a gentleman and exchanged my 33s for his 31s off of his sport. The JT drives like a dream on 31s and 4.10s. Low end power, maintains 8th gear at 2000 RPMs without constantly downshifting to 7th on the highway. The math says to maintain that same driveability, 4.88 is the gear ratio for 35s.
I asked about this at the dealership and was told that if I regear, it will void the ENTIRE powertrain warranty. Engine, tranny, and axels.
This makes absolutely no sense to me since the same dealership sells heavily modded Jeeps with 37s and 40s which make the engine and tranny work MUCH harder with 4.10 gears. Service manager states “you’re increasing your RPMs”. My argument is no, I’m decreasing them because it will hold 8th at 2000 instead of constantly downshifting to 7th and hitting 2700 to maintain highway speed.
I would understand voiding the warranty on the diffs, but the engine and tranny too? For essentially making them work less. Anyone successfully regeared and not had their engine and tranny voided by the stealership?

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[CerOf]

It could void the warranty. In theory, the dealership would have to prove that your engine damage was from the gears. In reality, seems they could deny it and put the onus on you.

Real chance the dealer won’t check what gear ratio you have if the engine or tranny give up the ghost.

Reality again is, anything you do apart from stock, could raise an issue.

 

[garzilla]

What they say doesn't matter. Just be prepared for a possible warranty fight if you modify the driveline. If it doesn't happen cool, if it does you were prepared

 

[usnavycdr]

I Regear.
I have a 2020 Mojave that came stock with 33 inch MTs and 4.10s.
I have 35s on order so I went ahead and sold those stock 33s to a gentleman and exchanged my 33s for his 31s off of his sport. The JT drives like a dream on 31s and 4.10s. Low end power, maintains 8th gear at 2000 RPMs without constantly downshifting to 7th on the highway. The math says to maintain that same driveability, 4.88 is the gear ratio for 35s.
I asked about this at the dealership and was told that if I regear, it will void the ENTIRE powertrain warranty. Engine, tranny, and axels.
This makes absolutely no sense to me since the same dealership sells heavily modded Jeeps with 37s and 40s which make the engine and tranny work MUCH harder with 4.10 gears. Service manager states “you’re increasing your RPMs”. My argument is no, I’m decreasing them because it will hold 8th at 2000 instead of constantly downshifting to 7th and hitting 2700 to maintain highway speed.
I would understand voiding the warranty on the diffs, but the engine and tranny too? For essentially making them work less. Anyone successfully regeared and not had their engine and tranny voided by the stealership?

The way to avoid the issue is to order the Mopar 4.88s and have dealer install so they are warranted. Mopar covers factory options installed by the dealer like the 2" lift for instance.

 

[yoda13]

It definitely could void the warranty, so prepare to fight. If Mopar offers 4.88s, and I didn’t know they did that’s cool, the dealer is your best bet if you are concerned about warranty. A word of warning, I had the dealer install gears on my JK and it didn’t go well. That’s just my singular experience though!

 

[Boostnu]

My local dealership has done several regears. I have talked to them about doing mine but haven’t went through with it yet.

 

[Slojo]

I installed a 2" lift on my 08 JKU in 2012 and put 33s on it. The only thing ever stated when I turn it in for repair is that the original warranty will not cover non-VIN items. Didn't expect it to.

 

[jsalbre]

I’m running 35s on my Mojave (Falken Wildpeak AT3W) and they measure 34.8 (so bigger than most “35s”) and they’re heavy, and it’s still plenty driveable. I can still chirp the tires from a stop, and it’s got no issue getting up to speed or running 8th gear on the highway.

I wouldn’t even consider regearing until you’ve driven it.

 

[spectre6000]

Not all dealerships are created equally. There is a reason for the "stealership" moniker and the overall terrible reputation of car dealers as a whole. You need to find a better one. We drive more than an hour each way (past several other lesser dealerships) to get to what we think is our best option for my wife's JK. After the last visit, I'm rethinking that, but they did ultimately fix the physical problem they caused (the sexism is still an issue).

 

[Tommyd]

I Regear.
I have a 2020 Mojave that came stock with 33 inch MTs and 4.10s.
I have 35s on order so I went ahead and sold those stock 33s to a gentleman and exchanged my 33s for his 31s off of his sport. The JT drives like a dream on 31s and 4.10s. Low end power, maintains 8th gear at 2000 RPMs without constantly downshifting to 7th on the highway. The math says to maintain that same driveability, 4.88 is the gear ratio for 35s.
I asked about this at the dealership and was told that if I regear, it will void the ENTIRE powertrain warranty. Engine, tranny, and axels.
This makes absolutely no sense to me since the same dealership sells heavily modded Jeeps with 37s and 40s which make the engine and tranny work MUCH harder with 4.10 gears. Service manager states “you’re increasing your RPMs”. My argument is no, I’m decreasing them because it will hold 8th at 2000 instead of constantly downshifting to 7th and hitting 2700 to maintain highway speed.
I would understand voiding the warranty on the diffs, but the engine and tranny too? For essentially making them work less. Anyone successfully regeared and not had their engine and tranny voided by the stealership?

What??? I love the reason. Your increasing rpm’s. No I’m putting rpm’s back to stock. Increasing rpm would be putting 10 inch tires on. Jeez

 

[Tommyd]

How would the dealership know if we did a regear? If I went and had my gears changed from a 4 x 4 shop how old is my dealer going to know that I regeared?

 

[LostWoods]

How would the dealership know if we did a regear? If I went and had my gears changed from a 4 x 4 shop how old is my dealer going to know that I regeared?

If you have a driveline issue, it will be very apparent during the teardown and they'll void the warranty for any axle work since it's modified. They can't and don't void your warranty preemptively, they just flag you in the system and that flag basically voids any related claims.

 

[wayned]

Look this up.
Magnuson–Moss Warranty Act

 

[Minty JL]

Ask for FCA documentation to back up their claim......if they can't produce it......well there's your sign. Their lack of knowledge and opinions don't mean squat.

IF the above happens, find another dealer. Then leave them a glowing review aka nuclear because they provided zero intelligent customer service.

But, that's how I roll. Reviews and speaking to customers of the service department let me know what dealer will or will not touch my Jeep(s)

 

[Wheelin98TJ]

How would the dealership know if we did a regear? If I went and had my gears changed from a 4 x 4 shop how old is my dealer going to know that I regeared?

They can take it for a drive and figure it out without opening your diff.

RPM x tire diameter
-------------------- = gear ratio
MPH x 336


Or they can count driveshaft rotations for both tires to make one complete rotation.

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