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  1. #1
    Jr. Mechanic GrizzlyTN's Avatar
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    Default 2008 GMC MotoWheel 951 33's and random questions

    I have a random stream of thought so bear with me.

    I just had my wheels and tires put on, and have a few concerns/questions now.

    #1 As soon as I was pulling out of the shop parking lot I noticed that my brakes/rotors feel warped. Everything is aligned and runs straight. Is there anything that would make them do that, even though they were fine 30 minutes before install?

    #2 I also noticed that my transmission is running at 195 to 200 degrees now when it constantly ran at 169 degrees with my stock rims. It makes sense it's working a little harder to pull but just wanted to make sure it was within standard temperature.

    #3 I had TMPS installed with my order when they were mounted and balanced, how do I get them to sync up?
    2012 Chevy Silverado Z71 4x4 5.3
    Rough Country 2.5' Lift/Level
    Chevy 18's on Toyo Open Country MT 33's
    DiabloSport Trinity Tuner with Custom Tune from Lew
    Debating on AMP Research Powersteps

    2008 GMC Sierra WT 4x2 4.3

    3" Rough Country Suspension Lift w/Control Arms
    Super 44 Flowmaster Straight Dual Exhaust from the Cat Back with 18" Chrome 3.5" Exhaust Tips.
    Moto Wheels 951 18" on Nitto Mud Grappler 33's
    Infinity Kappa Perfect 6.1 System with Kenwood 5.1 amp using Stock Headunit.

  2. #2
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    stephan's Avatar
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    Beautiful truck Grizz ... Did you watch the mech put your wheels on your truck? Did he use a torque wrench or did he RAM them on with an impact wrench? Wheels should be torqued. Some air guns can turn up to 150 foot pounds & warp the rotors which sounds exactly like what you are feeling. If he did torque them then it could be the squirm of the tires you're feeling. If they used an impact gun you might try loosening them & retorqueing them. It's possible that in addition to getting them too tight, they also may have gotten them all uneven & pulled the rotors "out of true" & holding them there. If you haven't gotten them too hot where they take a "set" retorqueing them might fix them.

    As far as your temp guage, I don't see where it's working "that" much harder to cause that big a temp increase. With these two problems happening at the same time, it almost sounds like they gave you the wrong truck back.
    1988 Chevy C-3500 2wd (no pic)
    350 c.i. 5.7 L Stock Block, 4 Bolt Mains
    L-31 Vortec Heads, Edelbrock Cam & Intake,
    Holley 650, Flowtech Headers, Magnaflow exh.
    Jet Trans 700R4, B&M Ratchet, 4:10 gears,
    3" susp. lift kit "shadetree"
    No rev limiter, No speed limiter lol


  3. #3
    Legend Bigbomber's Avatar
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    Default

    Truck looks awesome with the new rims and tires.I agree with what stephan said about using a torque wrench to put on rims.I hope they didn't use an impact wrench and if they did i hope they didn't warp the rotors.My guess is that they pulled the rotors and they are now uneven.Good luck!
    [/SIGPIC]2009 Chevy Silverado LT 1500 EXT CAB 4X4 Vortec 4.8L SFI,K&N air filter,Weathertech Floor Liners ,Weathertech Stone/Bug Deflector, Line X Spray On Bedliner, TruXport Rollup Tonneau Cover, Molded Mudguards, Viper 5701 LE 2 way Security Alarm/Remote Starter, Xm Satelite Radio,BILSTEIN 5100 rear shocks,BILSTEIN 5100 front levelling shocks,READYLIFT 2" rear lift blocks,Goodyear Wrangler Territorys -265/70R 17"

  4. #4

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    The setup does look great! That is a big increase in running temp but still within specs I'm pretty sure. Someone can correct me on that if I'm wrong.

    2006 Duramax LBZ
    Edge Evo
    4'' Diamond eye to 6'' tip
    16'' ion alloy, 33'' fierce attitudes
    Lots of work left to do!

  5. #5
    Jr. Mechanic GrizzlyTN's Avatar
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    Default

    That's what I am thinking, they bent the rotors. It is definitely not they way I brought it to them. Heading back over there after work.
    Quote Originally Posted by stephan View Post
    Beautiful truck Grizz ... Did you watch the mech put your wheels on your truck? Did he use a torque wrench or did he RAM them on with an impact wrench? Wheels should be torqued. Some air guns can turn up to 150 foot pounds & warp the rotors which sounds exactly like what you are feeling. If he did torque them then it could be the squirm of the tires you're feeling. If they used an impact gun you might try loosening them & retorqueing them. It's possible that in addition to getting them too tight, they also may have gotten them all uneven & pulled the rotors "out of true" & holding them there. If you haven't gotten them too hot where they take a "set" retorqueing them might fix them.

    As far as your temp guage, I don't see where it's working "that" much harder to cause that big a temp increase. With these two problems happening at the same time, it almost sounds like they gave you the wrong truck back.
    2012 Chevy Silverado Z71 4x4 5.3
    Rough Country 2.5' Lift/Level
    Chevy 18's on Toyo Open Country MT 33's
    DiabloSport Trinity Tuner with Custom Tune from Lew
    Debating on AMP Research Powersteps

    2008 GMC Sierra WT 4x2 4.3

    3" Rough Country Suspension Lift w/Control Arms
    Super 44 Flowmaster Straight Dual Exhaust from the Cat Back with 18" Chrome 3.5" Exhaust Tips.
    Moto Wheels 951 18" on Nitto Mud Grappler 33's
    Infinity Kappa Perfect 6.1 System with Kenwood 5.1 amp using Stock Headunit.

  6. #6

    Default

    The truck looks excellent! I like those wheels and tires. Anyway, I hope they get you squared away this evening.

  7. #7
    Jr. Mechanic GrizzlyTN's Avatar
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    Default

    Got back from the shop, I made them drive it to feel what I was talking about. They described the vibration when you hit the brakes as strong enough to "mix a milkshake". They pulled the wheels off and checked the rotors, showed me and they were clean. He balanced the wheels and they were off a little but not anything to make the truck shake like that. Mechanics said it was probably the tires??? I just dropped 2200 bucks on these tires and rims... it has to be something else.

    Why would it drive perfectly straight and smooth city and highway but only shake/vibrate when I apply the brakes?

    I don't feel it in the steering wheel or the brake pedal and it only happens most of the time. There have been a few times where it brakes perfect with no vibration.

    Maybe the tires/wheels are to heavy for the brakes?

    I'm at a loss guys.
    Quote Originally Posted by stephan View Post
    Beautiful truck Grizz ... Did you watch the mech put your wheels on your truck? Did he use a torque wrench or did he RAM them on with an impact wrench? Wheels should be torqued. Some air guns can turn up to 150 foot pounds & warp the rotors which sounds exactly like what you are feeling. If he did torque them then it could be the squirm of the tires you're feeling. If they used an impact gun you might try loosening them & retorqueing them. It's possible that in addition to getting them too tight, they also may have gotten them all uneven & pulled the rotors "out of true" & holding them there. If you haven't gotten them too hot where they take a "set" retorqueing them might fix them.

    As far as your temp guage, I don't see where it's working "that" much harder to cause that big a temp increase. With these two problems happening at the same time, it almost sounds like they gave you the wrong truck back.
    2012 Chevy Silverado Z71 4x4 5.3
    Rough Country 2.5' Lift/Level
    Chevy 18's on Toyo Open Country MT 33's
    DiabloSport Trinity Tuner with Custom Tune from Lew
    Debating on AMP Research Powersteps

    2008 GMC Sierra WT 4x2 4.3

    3" Rough Country Suspension Lift w/Control Arms
    Super 44 Flowmaster Straight Dual Exhaust from the Cat Back with 18" Chrome 3.5" Exhaust Tips.
    Moto Wheels 951 18" on Nitto Mud Grappler 33's
    Infinity Kappa Perfect 6.1 System with Kenwood 5.1 amp using Stock Headunit.

  8. #8
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    mfleetwood's Avatar
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    Did they check to see if your rotors were warped? I had the same problem when braking and the reason was that my rotors had over-heated to the point they warped. Although the cause appears to be from a different than yours, the symptons seem to be the same. Also, the vibration would get worse the more the brakes warmed up.
    Last edited by mfleetwood; 11-16-2010 at 11:04 PM.


    Mike (Denver, CO) - 2008 Sierra 1500 Z71 SLE 5.3L 4WD

    SUSPENSION: Rancho 4" Suspension Lift; Rancho RS9000XL Shocks; Rancho Skid Plates; Rancho MyRide Wireless Shock Controller;
    TIRES:
    BFG All Terrain KO 315/70/17
    DRIVE TRAIN: 4.56 Gears; Detroit TrueTrac Differential; True Cool 40k Transmission Cooler
    PERFORMANCE: DiableSport Predator Tuner; Custom Tuned by Diablew; Magnaflow Exhaust; AFE Cold Air Intake
    ELECTRONICS: Kenwood DNX6180 Touchscreen; Subthump box w/10" Kicker; Driver Information Center (DIC); Rear View Camera
    ACCESSORIES: Westin Brush/Grill Gaurd; Westin Nerf Bars; Truxedo Tonneau; 20% Tint; Tow Mirrors w/Heat & Signals

  9. #9
    Jr. Mechanic GrizzlyTN's Avatar
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    Jackson Tennessee
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    Default

    They used the tool to show me the variance as it spinned with the clamp on it. Although they only showed me the passenger front rotor. I think it has to be the rotors or something along those lines. It's only when the brakes are applied, and only showed up immediately once the new wheels and tires were put on. I noticed the vibration within five minutes of driving it for the first time with the new set on.

    Do you think that the rotors were already warped but it wasn't as noticeable until I put the 33's on there?
    Quote Originally Posted by mfleetwood View Post
    Did they check to see if your rotors were warped? I had the same problem when braking and the reason was that my rotors had over-heated to the point they warped. Although the cause appears to be from a different than yours, the symptons seem to be the same. Also, the vibration would get worse the more the brakes warmed up.
    2012 Chevy Silverado Z71 4x4 5.3
    Rough Country 2.5' Lift/Level
    Chevy 18's on Toyo Open Country MT 33's
    DiabloSport Trinity Tuner with Custom Tune from Lew
    Debating on AMP Research Powersteps

    2008 GMC Sierra WT 4x2 4.3

    3" Rough Country Suspension Lift w/Control Arms
    Super 44 Flowmaster Straight Dual Exhaust from the Cat Back with 18" Chrome 3.5" Exhaust Tips.
    Moto Wheels 951 18" on Nitto Mud Grappler 33's
    Infinity Kappa Perfect 6.1 System with Kenwood 5.1 amp using Stock Headunit.

  10. #10
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    mfleetwood's Avatar
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    I don't know much about brakes beyond the experiences with mine...It does sound like the wheels were not torqued evenly and when the rotors heated up for the first time, they warped due to the lugs being overly tightened unequally. Now that I think about it, it happened shortly after a shop had my tires off. I was chalking up the warped rotors to my drving in the mountains and going a tad too fast downhills, but now I am not so sure...it sounds like it could have been a combination of both. I do know that when I replaced my rotors and put on new pads, the vibration completely went away.

    I do think that if the rotors were warped before the tire and rim change, you would have noticed it then as well as after.

    I hope you find the problem soon, as the vibration is really annoying. BTW, your truck does look awesome though!
    Last edited by mfleetwood; 11-16-2010 at 11:30 PM.


    Mike (Denver, CO) - 2008 Sierra 1500 Z71 SLE 5.3L 4WD

    SUSPENSION: Rancho 4" Suspension Lift; Rancho RS9000XL Shocks; Rancho Skid Plates; Rancho MyRide Wireless Shock Controller;
    TIRES:
    BFG All Terrain KO 315/70/17
    DRIVE TRAIN: 4.56 Gears; Detroit TrueTrac Differential; True Cool 40k Transmission Cooler
    PERFORMANCE: DiableSport Predator Tuner; Custom Tuned by Diablew; Magnaflow Exhaust; AFE Cold Air Intake
    ELECTRONICS: Kenwood DNX6180 Touchscreen; Subthump box w/10" Kicker; Driver Information Center (DIC); Rear View Camera
    ACCESSORIES: Westin Brush/Grill Gaurd; Westin Nerf Bars; Truxedo Tonneau; 20% Tint; Tow Mirrors w/Heat & Signals

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