post #1 of Old 05-20-2013, 07:46 AM Thread Starter
gabbagabba
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Tires, Mods (lift) vs. Jeep warranty

I have searched some of the threads and seen conflicting and vague answers.

1) is there any clear info on how much you can change tire size and not void your warranty. i.e. you can up size to a 265/65/18 but not a 275/75?

2) is there any info about lift and warranty impact? I have QL so this does not apply to me but I am throwing it out as many will need the answer to both of these questions as a lift and tire change are often paired

Best sources of info would be something you have in writing or perhaps JeepCares knows?

Thx!

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post #2 of Old 05-20-2013, 08:18 AM
Jackal01
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The consensus regarding a lift is that since the main one right now is the RRO 2.5" that it falls within the max QL lift height thus not exceeding any factory tolerances. As far as tire size, I cannot imagine a tire size voiding a warranty. Without massive modification a huge tire that would cause a lot of damage just cannot fit in that wheel well. The Dealer has to prove that the modification caused the part to fail. Obviously adding a larger tire increases the weight of the tire thus applying that weight to rest of the suspension and drive train so overtime it could cause premature damage/failure on said parts.
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post #3 of Old 05-20-2013, 10:42 AM
ColdCase
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Oversized tires and lifts are unapproved modifications. Dealers have some discretion (and many turn a blind eye) but technically you must stay within the OEM tire size to guaranty warranty coverage without hassle. In theory oversize tires compromise the ABS and traction control tuning and puts additional loading on the transfer case and axles.

There have been two reports here of dealers putting oversize tire notes into the data base for a VIN and folks subsequently denied warranty for transfer case issues. First one covered, second one not. Getting that note attached to tour VIN can be a source of frustration down the line.

Dealers must show that your mod may have contributed to the failure, they can't deny a radio warranty claim because you run oversize tires.

There doesn't seem to be many failure reports here, let alone those that may be due to tires or lifts. So the situation rarely comes up. These have light truck duty type drive trains, so you can't push them much without getting into wear trouble.

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post #4 of Old 05-23-2013, 08:57 PM Thread Starter
gabbagabba
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I asked my dealership and they said that if they do the mods it should be no issue. I was specifically asking them about tire upsizing. FYI.
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post #5 of Old 05-24-2013, 06:47 AM
ColdCase
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Quote:
Originally Posted by gabbagabba View Post
I asked my dealership and they said that if they do the mods it should be no issue. I was specifically asking them about tire upsizing. FYI.
Not wanting to be a nit but "should" vs "guarantee" is the question. And is should applicable only for service the same dealer?

There are many chrysler products with more tire options and upsizing is routine. The dealer service rep may not be aware of the WK2 limits off hand. You should also ask if they will recalibrate the speedo (tire factor) and ask if they have ever done it on a WK2.

2011 Grand Cherokee Overland V8, 2009 Liberty Rocky Mt V6, 2000 Grand Cherokee Laredo I6, 1979 CJ7 I6 Quadratrac
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