08-03-2022, 02:26 PM | #23 | |
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08-03-2022, 06:19 PM | #24 | |
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That said, ISTA is not hard to use once it's running. I use it with an ICOM though which adds expense. Good luck. |
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08-03-2022, 07:00 PM | #25 | |
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08-04-2022, 10:11 AM | #26 | |
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I'll run a scan on my X5 today to get the menu tree if I have some time. It'll be under service functions, possibly under drivetrain or traction control, but I'll see what I can find. |
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08-04-2022, 10:41 AM | #27 |
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08-04-2022, 10:58 AM | #28 | |
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That doesn't even make sense for 28 inch overall width on a 20" wheel/tire that would be .28 or approximately 1/4 of an inch diff. My OEMs are worn all to shit with at least that much diff and they give me zero drive-train issues. Not to mention the vehicle hasn't kicked a single DSC or ABS code. Last edited by Chicane_S54; 08-04-2022 at 11:12 AM.. |
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08-04-2022, 11:50 PM | #29 | |
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I scanned the truck today to get the service tree. It goes as follows in ISTA-d: Vehicle Management: Service Functions: Power train: Transmission contro unit VTG: Oil change. That will initiate the adaptation service plan. I'll post a picture tomorrow. Edit: Here's the picture for service location Last edited by crystalworks; 08-05-2022 at 10:40 AM.. |
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08-07-2022, 09:43 AM | #30 | |
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So that boils down to approximately 1/4" of wear. Could it be the 20" wheels are more sensitive to this difference in wear than the 19's? It looks as though I am looking at getting a new set of tires. What size tires are you running on your 20's. Are your 20's staggered? When I go to Tire rack when I select tires by vehicle every 20" setup is a staggered setup. Last edited by Chicane_S54; 08-07-2022 at 09:50 AM.. |
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08-07-2022, 11:12 AM | #31 |
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May be worth running the Transfer case calibration (VTG control unit) before buying new tires.
I’m running 275/40R20 (F) and 315/35R20 (R) and recalibrated shortly after replacing them 5k miles ago. Worth noting, Tire Rack can shave tires to match tread depth of existing tires if aren’t replacing all 4. |
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08-07-2022, 11:20 AM | #32 | |
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08-07-2022, 12:55 PM | #33 | |
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Good luck! |
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08-07-2022, 02:33 PM | #34 | |
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I had a set of DWS' on them prior that had 30k miles+ on them when the tugging from the transfer case started. As soon as the Toyos went on the problem went away. FWIW, I never had problems with tugging on the factory 19's and Bridgestone RFs. It could very well be possible that the 20's thinner sidewall wears the rears at a rate that makes the front to rear unhappy. |
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08-07-2022, 07:27 PM | #35 | |
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08-08-2022, 11:02 AM | #36 | |
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In theory, you can run any wheel tire combo out there with a near identical diameter. Otherwise the 19's would have issues as they are not staggered. I can see how this is frustrating. All things point to this being able to work without issue. Yet here you are. At this point... I'd try and service the transfer case fluid and run the calibration. Because why not. At any rate, I'm rooting for you. |
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08-08-2022, 11:10 AM | #37 | |
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08-08-2022, 11:34 AM | #38 | ||
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It may not trigger any codes because it doesn't think there is anything wrong with the system, it just thinks there is wheel slip. Quote:
Some tire makes are spot on for their sizes, and some are not. I have seen a lot of people on these forums and in FB groups have issues with brand new conti's that are supposed to be the correct sizes to maintain that 1%. I have never ran conti's because of this. An old room mate of mine used to manage a Discount Tire. He would often talk about how he could take two tires, same make model and size, and one would be taller than the other once mounted, even with the same lot numbers. You can try the transfer case calibration and service, it may help, it may not. Won't know until you try.
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08-09-2022, 11:48 AM | #39 | |
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08-09-2022, 01:01 PM | #40 |
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If the recalibrate doesn't work you may be able to work with the tire shop and work an exchange if you haven't put many miles on them, especially since you can show other setups do not cause issue.
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