2500HD Rear Axle Hub Bearings & Axle Seal Replacement

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  • Опубликовано: 3 окт 2024
  • In this Video I replace the Rear Axle Bearings, BOTH bearings!!!
    and the Axle Seal on my 2007 Chevy 2500HD CrewCab Duramax Diesel
    DIY Medium
    Parts: Ebay
    Rear Wheel Bearing & Seal Set FOR 2001-2010 GM SILVERADO 2500HD
    1 Year Warranty
    www.ebay.com/i...
    If you search for these Bearings and Seals, the same should work on the following
    2001-2010 Chevrolet Silverado 2500HD
    2001-2010 GMC Sierra 2500HD
    If you like my video. Subscribe to my channel
    Packwood Performance 4x4

Комментарии • 232

  • @Simple_Youtube
    @Simple_Youtube Год назад +7

    Finally, a video showing both he bearings. Great video.

  • @jrhampton78
    @jrhampton78 3 года назад +8

    Great video! I was replacing my rear calipers, rotors, and pads on my 2500HD when I noticed I had gear oil collecting in the caliper on the driver side. After watching this video I was confident I could replace all the bearings and seals as well. Your video was detailed and thorough. I double checked the torque specs to be sure, and you were right on. Thanks for the help! I had zero issues.

  • @WyKeDnCaLi
    @WyKeDnCaLi 3 года назад +7

    thank you for the video .... was a lifesaver ..... i’ve replaced the seal 3x on my 08 3500hd 4wd, and it’s leaked every time .... finally, thanks to your video, i realized there was still part of the old seal (original) stuck in there!!! hopefully my 4th time will be my final one!!!!

  • @steveo6631
    @steveo6631 4 года назад +10

    Awesome job, brother... After researching youtube and manuals, I did my inner and outer bearings on both sides of my 2004 silverado 2500hd... There was no information anywhere about the outer bearings and everyone had a different spec for tightening the locknut... Both sides failed pretty quick and I thought I tightened the hub too tight... So, I'm ready to do this again and thankfully found your video... I ended up putting the outer race on first, then the bearing and retainer... Now I know the bearing goes first... I use a block of wood also for the seal... Anyway, I have to thank you for this so my job won't fail this time... There's too much confusion out there regarding these full floating hubs.... You cleared it up... This video should get 100000 views... Peace...

  • @fullpullcharters6298
    @fullpullcharters6298 3 года назад +6

    Great job. Like that you included torque settings, very helpful.

  • @robertvroman6788
    @robertvroman6788 2 года назад +5

    Thank you so much for this video, just got finished with mine on a 2003 Suburban 2500 and everything I found was for the 1500. This was perfect. And including the torque specs, absolute perfection! Much better explanation and video quality than a lot that are out there, even from some of the well known/commercial video producers.

    • @packwoodperformance4x474
      @packwoodperformance4x474  2 года назад +1

      Thank you. I'm glad I could help. I wish I was still making videos but I haven't had time.

  • @ozmosis0074
    @ozmosis0074 3 года назад +16

    Good video, if the metal ring sticks to the spindle instead of using a flat head you can use a chisel to lightly score every inch or so all the way around it. The chisel causes the sheet metal to slightly expand so as you work around the ring it will just pop off. Also putting your races in freezer for a bit will shrink them making it very easy to install in hubs. Worked as a semi mechanic for years and a full floater 14bolt is just a baby semi rear end.

  • @TheCoffeOrTea
    @TheCoffeOrTea Год назад +3

    Out of all the videos for seal replacement out there yours is most descriptive. Thank you for providing torque valves too.

  • @JamesJohnson-cz8gb
    @JamesJohnson-cz8gb 2 года назад +1

    This is a GREAT VIDEO!! A MUST WATCH IT! He explains everything down torque specs.

  • @jayrichmond2325
    @jayrichmond2325 Год назад +1

    Great job! Thanks for mentioning both bearings. That helped a lot since most videos only show one.

  • @sirsweetness8332
    @sirsweetness8332 3 года назад +3

    Excellent video. Very methodical and shows every step. My type of video instruction.

  • @erikbjorgen3495
    @erikbjorgen3495 Год назад +1

    Great video, have been using your video all along the way that I've been changing my bearings out today! Going smooth so far thanks to you 🤘

  • @jameschupp2230
    @jameschupp2230 Год назад +1

    Great Video! Because of your detailed explanation I am going to tackle this myself!

    • @packwoodperformance4x474
      @packwoodperformance4x474  Год назад +1

      It was not as hard as I thought. But it took all day.

    • @jameschupp2230
      @jameschupp2230 Год назад +1

      Well for me it took 2 days and a morning. And then the differential was dripping a little bit, so I used the impact to tighten up the bolts and snapped a bolt and then... 4 hours later... Had to drill out and re-tapped for a larger size bolt.
      But really your video gave me the confidence to even think I could do it... Thanks!

  • @sirsweetness8332
    @sirsweetness8332 3 года назад +5

    Got to do everything you did plus have to do backing plates and all new brakes. Got a pile of new parts. My E-brake imploded a few years ago because the backing plates disintegrated

  • @McSpeedAlaskanAdventures
    @McSpeedAlaskanAdventures Год назад +1

    Thank you! I'm a serious do it yourselfer - but for reasons unknown to me this really made me nervous. I have the GM manual online and isn't 100% clear what to do. My truck has 290K miles - I bought it used and have no idea the history. Bearings looked great (Made in USA Timken) - but it was starting to leak. I replaced the parking brake shoes and hardware and got a new Napa seal. Saved the $177 on the J tool for the seal and used a block of wood and rubber mallet - went in smooth. Now - how to exactly adjust the parking brake shoes...and to...or not to replace the seal on the other side when it currently isn't leaking???? Truck serves to haul the slide in camper - that's its whole job right now. So...ponder breaking open the other side when it isn't leaking I must. 😀

  • @rogervonschleusingen4603
    @rogervonschleusingen4603 2 года назад +1

    GOOD PICTURES AND VIDEO MATE, NICE JOB...THANK-YOU VERY MUCH !!!

  • @MichaelAnderson-c2c
    @MichaelAnderson-c2c 3 месяца назад

    This video was well done and was a great help for completing my project. Thank you!

  • @garyfujinami9911
    @garyfujinami9911 9 месяцев назад +1

    Great video. Great delivery style. I had to laugh about the comment made when you spent 15min looking for the clip....I HATE when that happens. Haha

  • @JesseCampbell0
    @JesseCampbell0 2 года назад +1

    My bearings and seals are in great shape but the previous owner let it sit, the parking brake locked up and damaged the ABS ring on my 2013 duramax (unlike your '07, there's an encoder ring behind each hub instead of just on the drive shaft). Thanks for posting this, now I feel a bit more confident getting at it this week. With all the rust in my area, I'm sure every part of this is going to be worse :D

  • @workwithray8721
    @workwithray8721 Год назад +1

    I love the video you walked me right through something I have never done and it turned out good drives more smoother

  • @vioreltorj
    @vioreltorj 9 месяцев назад +1

    Thank you for sharing, you are good mechanic,God bless you 😊

    • @vioreltorj
      @vioreltorj 9 месяцев назад +1

      How do i know if I have 10 or 111/2?

    • @vioreltorj
      @vioreltorj 9 месяцев назад +1

      You mean the hub?

  • @timojm9091
    @timojm9091 10 месяцев назад +1

    Muy buen vídeo gracias por compartir very good video thanks for sharing good bless you

  • @rongray4118
    @rongray4118 2 года назад +1

    Thanks so much for posting your video! I will be having to do just this...starting to see some of what you are seeing from your driver's side as well!

  • @Lucky13zk
    @Lucky13zk 4 года назад +3

    Great video man. You helped me thru my repair like you wouldn't believe. And I also happen to think your camera and microphone work just fine :) don't think you need anything fancier since you explain and demonstrate the procedures very well. Thanks a bunch

  • @richw4846
    @richw4846 4 года назад +2

    Thanks for the good explanations on seals and setting the bearings. I am 1/2 way thru my '14 Express van 2500HD / Duramax 6.6 and the hubs and axles are identical. I needed some more information that was not in the manual. Like others said, cam and video are fine. Can see and understand everything.

  • @maneotis4g63t
    @maneotis4g63t 4 месяца назад

    This video saved my ass with all your tips and tricks. Thanks man!

  • @stephaneaudette6665
    @stephaneaudette6665 2 месяца назад

    Verry helpful video. Hi chek many and this is the best and comprehensive.
    Thank you very much

  • @scflooring8658
    @scflooring8658 3 года назад +3

    Best video I’ve seen on this thanks

  • @TheDisgruntledMechanic
    @TheDisgruntledMechanic 4 года назад +1

    Double the pleasure double the fun! Isn't 2 seals always better than one? HA! yes getting all of the seal out is a very important step.

  • @pawzeetrackmcgee8355
    @pawzeetrackmcgee8355 9 месяцев назад

    Brother, I like you I like you a lot you remind me of me when I was younger and by the way, that was very informative I was lost until I watched your video. Thank you.

  • @joeskinwalker7628
    @joeskinwalker7628 3 года назад +2

    Damn, one hell of a good job with limited tools. Wow thanks for sharing your experience. I am probably going to have to do my truck some day. Incredible work. Thank you an God bless. 2 thumbs up from here. 🙂 👍

  • @georgeoliver7945
    @georgeoliver7945 3 года назад +1

    Just wanna let you know that you did a great detail job on this video and it helped a lot

  • @allgutsnoglorywtg
    @allgutsnoglorywtg 3 года назад +2

    Im about to do this on my 04 2500hd. Great video, thanks so much 👌

  • @ronniebenoit4081
    @ronniebenoit4081 3 года назад +3

    FYI.... I wish it only took 37 minutes for both sides!!!! Lol. Thanks for the shade tree mechanic video 👍👍🤪

  • @HighPriority
    @HighPriority Год назад +1

    Nice job dude! I was going to make a video for this but but during a brake job my leak popped up so no time haha. Thanks for the torque specs too!

  • @gregmaggielipscomb9246
    @gregmaggielipscomb9246 3 года назад +3

    Your puch is actually a "Bull Prick," used by Red Iron workers to align primed girders as they are being riveted in place at great heights.

  • @salchavez8773
    @salchavez8773 2 года назад +1

    Thanks, and Awsome Detailed Video, You Gotta Make More!!! :)

  • @TheBeast_Blake
    @TheBeast_Blake 4 месяца назад

    Awesome video thanks a bunch for sharing

  • @SB-vi9kg
    @SB-vi9kg 2 года назад +1

    Very good video. Thanks for posting...

  • @bradleystevens2956
    @bradleystevens2956 Месяц назад

    very well done, good detail and description, doing my '04 Suburban 2500 right now using your techniques,....i cant get that snap ring out...

  • @shannon5th
    @shannon5th 4 года назад +2

    Great video. Seems as if this will basically apply to my 2004 Chevy Express 3500, with maybe different torque specs.

  • @toomars1301
    @toomars1301 3 года назад +1

    Thanks for posting! Very helpful!

  • @davidmcknight5850
    @davidmcknight5850 2 года назад +2

    96 dually rear hub bearings work the same but that little clip holding the outer bearing is a booger. Also needed a real good clip tool to reach in there

  • @wesleywilliams6971
    @wesleywilliams6971 2 года назад +1

    Thank you so much for this video

  • @dnlmachine4287
    @dnlmachine4287 2 года назад +1

    Nice work, thanks for posting.
    The caliper bracket mounting bolts use medium thread locker. Be sure clean the old thread locker off before applying new.
    Stay gold.

  • @DrDoug-ok6iw
    @DrDoug-ok6iw 3 года назад +1

    excellent video - thank you for the effort to put this together! Very helpful.

  • @khampanemountry2323
    @khampanemountry2323 2 года назад +1

    Love it brother thanks for great tips

  • @jesserousseau2481
    @jesserousseau2481 2 года назад +1

    I just want to thank you for this video and your knowledge!! I wish I could do more then just hit a like button and subscribe!! I was scared to do this and was going to send it out and pay 1400!! Yea 1400. But I think that was with new hubs. Anyways I watched this 15 times ans it made this job easy and made me confident being able to do this. Again Thank you and godbless

  • @richweir5186
    @richweir5186 3 года назад +1

    The hole in the center of caliper is for pushing piston open a bit more so you can get caliper off easier... just FYI

  • @chasp044
    @chasp044 2 года назад +1

    Very good video!

  • @rolandos64
    @rolandos64 4 года назад +1

    you had me watching as I heard you call out tool sizes... I refer to videos to take notes down and set my tools aside. Rather than drag my hole tool box. It would be nice to know exactly what tools are needed when doing a job. Especially since I dont have the specialty tool to remove the center nut. From another video, I gather its a everthough 67037. From you, I know I need a T55 for Caliper slide out pins, 18mm caliper bracket bolts. No work on axel flange bolts... Either way, thanks

  • @timbcotree
    @timbcotree 7 месяцев назад +1

    Nice job

  • @Chaden338
    @Chaden338 8 месяцев назад

    Had to do this three times on 6.6 duramax. I think its still leaking right now. Everything was done this way the third time. First time they didn't want to replace the seal and I was told to install not the correct way. Third time went with new seals but forewent the socket. Third time I did as I was supposed. I did add some oil to the surfaces where the seals sealed. To not tear anything. I guess that's the issue.

  • @greglopez7345
    @greglopez7345 3 года назад +1

    Awesome job 😎👍

  • @white24valve
    @white24valve Год назад +1

    Drive in figure 8 pattern in a parking lot after fluid change/bearing /seal replacement!

  • @jesserousseau2481
    @jesserousseau2481 2 года назад +1

    Im.doing mine tomorrow

  • @KenMrKLC
    @KenMrKLC 4 месяца назад

    PLEASE READ! If you are doing this job on any truck thats rusty.. MAKE SURE the vent on the top of the axle tube is clear... If you have rusted up hole inside it will build up pressure and keep blowing seals out. Its more common than you think.

  • @daven7915
    @daven7915 Год назад

    If one seal is good, two seals are gooder:)

  • @kingkolt886
    @kingkolt886 Год назад +1

    Question: I will be doing this for the first time to my 03 duramax tomorrow. What’s the reason why you wedged the front tires ?

  • @HallnoutMhall
    @HallnoutMhall 5 месяцев назад +1

    Im curious if you experienced heat on either side after noticing seal failure?
    You still looking for a jeep cherokee?
    Couldny tell on your plate but florida?
    Thanks

  • @albertorojas1019
    @albertorojas1019 2 года назад

    Thank u Sr very helpful

  • @fisherdank
    @fisherdank 3 года назад +1

    Awesome video.
    1. Should I let the silicone dry a bit before tightening?
    2. hould I used the gaskets I ordered?
    3 any particular king of silicone?

    • @packwoodperformance4x474
      @packwoodperformance4x474  3 года назад +2

      No need to dry first
      If you use gaskets. Make sure surfaces are clean. No need for silicone.
      If you use silicone any gasket style should work.

  • @abrahamcampos7668
    @abrahamcampos7668 3 года назад

    Thank you so much. I have a 2007.5 duramax i goint to do the same job.

  • @Rodzilla408
    @Rodzilla408 3 года назад

    Good video. 👍 my rear left seal is leaking. After new seal it's still leaking on the test drive. I did put some gear oil on the seal and where it's sets on the shaft. And no silicone on the 8 bolt lol.
    Lesson learned. I get to do it again 😄🤣

    • @Chaden338
      @Chaden338 8 месяцев назад +1

      Did redoing it with no oil on the surfaces help?

    • @Rodzilla408
      @Rodzilla408 8 месяцев назад

      ​@Chaden338 yeah the leak stopped

  • @Madskills-hw2ox
    @Madskills-hw2ox 2 года назад +1

    Great show my friend
    Thank you
    Edit
    Can those E brakes be worked on without pulling everything off
    Mine are way over heating and I can smell them burning

    • @packwoodperformance4x474
      @packwoodperformance4x474  Год назад +1

      You can only adjust them with everything on. On the back side there is a hole and you can spin the adjuster for the e-brake with a flat head screwdriver.

  • @LeeButcher-n6l
    @LeeButcher-n6l 6 месяцев назад

    So, there are TWO grease seals on each hub?? It looked like you pulled one off, then pulled another one in the same position as the other. Then the left over metal from a seal that should have been removed. I thought there was just one seal per hub.

  • @TheRobertVD
    @TheRobertVD Год назад +1

    GREAT video!! Now I plan on tackling this myself. Question: did the kit you linked hold up well? Thanks

  • @ll1881ll
    @ll1881ll Год назад

    Awesome music

  • @jesserousseau2481
    @jesserousseau2481 2 года назад

    Made it looks easy hope it is mine are bad

  • @georgemurphy9936
    @georgemurphy9936 Год назад +1

    Hello - great video. Can you tell me what type of silicone you used when reinstalling the axle? Was it a silicone sealant/adhesive or a type of gasket maker? Thanks - GEM

  • @robertmcmahon1221
    @robertmcmahon1221 2 года назад

    Out standing ! Subscribe I did! Going to your channel to see what else I can learn.

  • @daven7915
    @daven7915 Год назад

    Thanks!

  • @craigbuness5554
    @craigbuness5554 3 года назад

    good informative video.

  • @chrishancock6485
    @chrishancock6485 4 года назад +1

    Great video. Makes it look a little less intimidating. One suggestion would be to change the brake pads and park brake shoes if they are contaminated with gear oil.

    • @packwoodperformance4x474
      @packwoodperformance4x474  4 года назад +3

      I agree. I thought I said that. I just didnt have the $$$. Definitely stops better now anyways.

  • @hindsight57
    @hindsight57 2 года назад +1

    Recently replaced the bearings in my hd2500. Your vid was a great reference to keep lookin back at.
    I like the tire/wheel set up you’ve got on. What are they? Thanks.

  • @nicksjustbored
    @nicksjustbored 4 года назад

    great video.

  • @98DemonZ28
    @98DemonZ28 2 года назад +1

    Question. Is this one seal on the axle hub that separated into two pieces or is there two separate seals for the hub and the housing?

    • @packwoodperformance4x474
      @packwoodperformance4x474  2 года назад +1

      One seal. It's 2 pieces combined to make one seal. One side is set to the axle and the other side spins with the hub.

  • @Jc-zt8tk
    @Jc-zt8tk 2 месяца назад

    When Installing the Key, how flesh is it with the axle nut? or Is it stick out pass axle nut.

  • @skliros9235
    @skliros9235 3 года назад +1

    So was the hub real loose at the beginning because the previous person installed it against that old seal that wasn't removed?

  • @bassdaze
    @bassdaze Год назад

    my beloved '05 LLY is making howling noise i take it in shop they said whole rear end needed replaced for $5700 including new rotors pads etc. Was your truck making a howling noise or just leaking?

  • @rmp608
    @rmp608 Год назад

    thank you owe you a cold beer!!!

  • @TYMWLTL
    @TYMWLTL 3 года назад

    Well done thanks.

  • @michaelcosentino8271
    @michaelcosentino8271 3 года назад +4

    Anyone know where I can get that socket and what size/type it is?

    • @packwoodperformance4x474
      @packwoodperformance4x474  3 года назад +2

      I believe it's a 2 3/4 - 9 pin. You can rent or buy at Oreillys for $12 or $22. I can't remember, sorry. But they know which one.

  • @nefilim2466
    @nefilim2466 Год назад

    The 2500 as the same differential like the 3500 you have to change the hubs for the dually ???

  • @dansworkshop1972
    @dansworkshop1972 4 года назад +1

    Hey great video. I've got to do my 2500HD GMC Sierra. This helps a bunch. Do you have any information on the axle nut removal tool, I'm striking out locally.

    • @packwoodperformance4x474
      @packwoodperformance4x474  4 года назад +2

      I believe I got it at Oreilly Auto Parts. They had it as a tool to rent or buy for $12 or $22 I think.

  • @jesserousseau2481
    @jesserousseau2481 2 года назад

    Hoping hub isn't damaged or that chaft

  • @christianmadore7574
    @christianmadore7574 Год назад +1

    At the beginning of the video you wiggle your rotor in and out. That won't help you much when you are you shooting for a bad bearing. Play on the vertical axis is what you are looking for.

    • @packwoodperformance4x474
      @packwoodperformance4x474  Год назад

      I wasn't checking for bad bearings. The hub seal is what I was fixing. I just did the bearings also.

    • @packwoodperformance4x474
      @packwoodperformance4x474  Год назад +1

      If you watch the full video. Someone had put a new seal on with part of the old one still on.

  • @davelosonczy1537
    @davelosonczy1537 Год назад

    Ty

  • @whosaidthat5236
    @whosaidthat5236 4 года назад +1

    I have an 2012 Sierra HD 2500 , is it any different then the 2010 model? Good video man ty for the info

    • @packwoodperformance4x474
      @packwoodperformance4x474  4 года назад

      Man. I would think it would be pretty much the same. Maybe different size bearings. I can't tell you for sure. I searched for 2012 bearings but only seen them for the front. Which is the same as mine.

  • @stephensclavos4485
    @stephensclavos4485 3 года назад

    This is what happens when a college kid designs something, on a computer, mine s a dual wheel , a small key way and a thin “ c “ clip holds it all together!! Any one remember when u could put together a truck with a nail if u did not have a cotter key for the axle castle nut !! Lol ! Plus u need tool # 123xx45 etc not to mention a damm lap top !

  • @TLC94LS
    @TLC94LS 3 года назад +1

    What tool kit did you use that had that special socket? Great instructional video! Ive got a leak seal on my Duramax right now, I'll be gathering parts and tools to get started! Thanks.

  • @zyzrobrahn8970
    @zyzrobrahn8970 3 года назад +2

    Did the bearings go out again? might wanna pack those bearings.

    • @packwoodperformance4x474
      @packwoodperformance4x474  3 года назад

      No. After my research, it never said to pack bearings with grease. The gear oil from the rear-end keeps them lubricated.

  • @MGMCLL
    @MGMCLL 2 года назад +2

    Don't you put grease instead of oil in the bearings?

    • @packwoodperformance4x474
      @packwoodperformance4x474  2 года назад +1

      No. Because it's the same as the rear-end fluid. And it flows down the axle tube into the hub and bearings. Like oil in a motor.

    • @MGMCLL
      @MGMCLL 2 года назад

      Yeah I saw that at the end of video lol hahaha I spoke to soon 😅

    • @MGMCLL
      @MGMCLL 2 года назад +1

      Thanks man this video going to help me lots!!! My passenger rear wheel started leaking oil so I'm guessing it's my bearing seal

  • @damianlaird5312
    @damianlaird5312 3 года назад +2

    Very helpful video. Just a quick question would there be any other reason why it would have a leak? Or is this kinda the most common reason? Changed the brakes on my 15 ram 2500 and the e brake was caked in grease

    • @packwoodperformance4x474
      @packwoodperformance4x474  3 года назад +1

      I need to change one on mine again. I seen a little piece of the brake hub shield where you adjust the E brake, has rubbed the hub seal to where it is leaking again. I knew it would, I already had it back together and I was tired that evening. Lol

  • @wesleywilliams6971
    @wesleywilliams6971 2 года назад +2

    29:33 I should call her

  • @maxxordinate5088
    @maxxordinate5088 Год назад +1

    How do i know when the seal is set? Im stuck at that step.

    • @packwoodperformance4x474
      @packwoodperformance4x474  Год назад

      When you torque the nut to spec. The seal should be set.

    • @maxxordinate5088
      @maxxordinate5088 Год назад

      @packwoodperformance4x474 i sure hope i did it right lol. Its on but i ran out of daylight before i could check my work.

  • @chasewayne2251
    @chasewayne2251 2 года назад

    nice

  • @rolandos64
    @rolandos64 4 года назад +1

    outside bearing race should not bottom out! Bearing cage is much taller than the race. Race should be pressed just pass the retainer ring ridge.

    • @scflooring8658
      @scflooring8658 3 года назад

      Hi can you explain little more thank you.

    • @packwoodperformance4x474
      @packwoodperformance4x474  3 года назад

      Like he said of course it's not supposed to bottom out. I really meant if it does bottom out you can turn it over and tap back like explained in the video. When your tapping it down into place, if you can see the groove that the ring pops into you know you're ready to stop tapping down.

    • @scflooring8658
      @scflooring8658 3 года назад +1

      Ok thank you very much getting ready to do mine this weekend trying to find the right way to do it and your video is the best one I've found

  • @sirsweetness6047
    @sirsweetness6047 2 года назад +1

    Can you use a press to put new bearing in hub?

    • @packwoodperformance4x474
      @packwoodperformance4x474  Год назад +1

      Yes I'm sure you could if you have one big enough.

    • @sirsweetness6047
      @sirsweetness6047 Год назад

      @@packwoodperformance4x474
      I used a 20 ton. It was more than adequate. I would say that one could use a 12 ton if they have it.

  • @johnsondave979
    @johnsondave979 3 года назад +1

    11.5 or 10.5 also are parts the same ??