1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Wits' End- 80 Series Inner Seal Overdrive Tool

Discussion in '80-Series Tech' started by NLXTACY, Nov 14, 2017 at 10:49 AM.

  1. NLXTACY

    NLXTACY Wits' End Supporting Vendor

    Messages:
    22,014
    Media:
    23
    Albums:
    2
    Likes Received:
    12,549
    Joined:
    Dec 7, 2007
    Location:
    West Hills, CA
    Developed by @Tools R Us and @inkpot

    Available to order: 80 Series Inner Axle Seal Offset Driver

    There is one thing that comes as a right of passage in owning an 80 Series and that is the rebuilding of our front knuckles. Generally speaking its not terribly technical, just messy and takes along time. Especially the first time.

    But there can be hiccups along the way that you may not always plan for and generally you find out the hard way when your weekend project starts leaking within 5000 miles. Nothing breaks your heart more.

    There are quite a few things that could g wrong but there is one that is often overlooked or just not considered and that is the inner seal that rides along the inner axle shaft that is connected to the birf. The OEM seal has been happily riding in its same spot for 100's of thousands of miles. The problem is that the rubber wiper part of the seal WILL inevitably wear a groove into the axle shaft. In time this means the gear oil will start to leak into the knuckle and basically work past the wiper seal and thus coat the backside of your knuckles in Toyota rustproofing.

    There are three ways of fixing this:
    • Purchase a new axle shaft from the dealer (or @beno)
    • SpeediSleeve
    • Underdrive or better yet, OVERDRIVE the inner seal

    Why overdrive the seal? Simple. The OEM inner seal as a given width. That width is actually narrower than the cavity its being tapped into. By overdriving the seal you are putting the seal's rubber wiper onto an UNTOUCHED portion of the axle shaft.

    Currently the easiest method to install the seal is to use a seal driver which is a hockey puck shape of aluminum which is larger than the seal and basically gives you a perfectly flush seal to the knuckle ball. To underdrive it you just...don't drive it all the way in. The issue is making sure its perfectly straight. To overdrive it you are actually driving the seal further into the knuckle ball. But doing this can be nerve wracking because again...how do you know its going it straight AND is the socket you are using deforming the edges of the seal?

    This is where the Overdrive Seal Installation Tool comes in. Not only does it capture the seal by having a dowel that matches the seals inner diameter, but it also has a 2mm shoulder that is designed to fit INSIDE of the knuckle ball to overdrive the inner seal STRAIGHT by 2mm.

    Very simple and reliable! Eventually this should be your seal driver tool of choice for the inner axle seal for any knuckle service. Brand new axle shaft? Still use it because you are starting the groove 2mm inboard. As you go thru repeated knuckle rebuilds the new seal location will eventually wear its new groove. Now switch back to a standard "flush" seal install and you are on a virgin spot on the axle shaft. ;)

    Inner-Sear-Press-Tool-2mm-rear-sm.png Inner-Sear-Press-Tool-2mm-sm.png

    In this illustration you can see the difference between the typical seal driver tool and the Wits' End overdrive tool. The driver itself is designed to work with either the Harbor Freight or the Lisle hand tool.

    Screen Shot 2017-11-14 at 8.20.52 AM.png

    The application of the seal works the same way as as seal driver tool.

    Screen Shot 2017-11-14 at 8.22.07 AM.png
     
    Last edited: Nov 14, 2017 at 9:53 PM
    Rice, WanderingFZJ, HDJdreams and 9 others like this.
  2. NLXTACY

    NLXTACY Wits' End Supporting Vendor

    Messages:
    22,014
    Media:
    23
    Albums:
    2
    Likes Received:
    12,549
    Joined:
    Dec 7, 2007
    Location:
    West Hills, CA
    Application of the inner seal stays the same. The seal slides onto the driver and the driver is inserted into the knuckle ball cavity.

    Screen Shot 2017-11-14 at 8.21.05 AM.png

    With the seal firmly placed into the driver there is no worry about the placement of the seal or of it "walking" while driving it in.

    Screen Shot 2017-11-14 at 8.21.18 AM.png

    In a typical installation tool the inner seal is set flush creating the same leaking issue.

    Screen Shot 2017-11-14 at 8.21.38 AM.png

    The new overdrive tool sets the inner axle seal 2mm INSIDE of the face of the knuckle ball taking it AWAY from the groove.

    Screen Shot 2017-11-14 at 8.21.47 AM.png

    Remove the overdrive tool by just pulling it back out. Can't be easier.

    Screen Shot 2017-11-14 at 8.21.59 AM.png
     
  3. richardlillard1

    richardlillard1

    Messages:
    1,140
    Likes Received:
    858
    Joined:
    Mar 15, 2014
  4. NLXTACY

    NLXTACY Wits' End Supporting Vendor

    Messages:
    22,014
    Media:
    23
    Albums:
    2
    Likes Received:
    12,549
    Joined:
    Dec 7, 2007
    Location:
    West Hills, CA
    I’ve been busy :flipoff2:
     
    Irish Reiver and GW Nugget like this.
  5. Kernal

    Kernal

    Messages:
    6,087
    Likes Received:
    417
    Joined:
    Dec 10, 2007
  6. hammerheadfistpunch

    hammerheadfistpunch

    Messages:
    878
    Media:
    7
    Albums:
    2
    Likes Received:
    243
    Joined:
    Jun 14, 2013
    Location:
    Sandy Utah area
    Very cool! Also, I need to ask you about another new product I sent to my wife for my christmas wish list.

    80 Series Useless Cubby Insert-base

    I was going to have one of these 3D printed for me but I lost my 3d printer hookups. How is this mounted? What kind of weights/loads can you put on this thing. Is it just tied into the dash?
     
  7. NLXTACY

    NLXTACY Wits' End Supporting Vendor

    Messages:
    22,014
    Media:
    23
    Albums:
    2
    Likes Received:
    12,549
    Joined:
    Dec 7, 2007
    Location:
    West Hills, CA
    You still can! Brad made something already but I don't really did the 3D look and I needed different functionality.

    Its only tied into the dash using the two existing screws. I have the length set in order to take advantage of the cantilevered design BUT it all still is reliant to the strength of the dash.
     
  8. hammerheadfistpunch

    hammerheadfistpunch

    Messages:
    878
    Media:
    7
    Albums:
    2
    Likes Received:
    243
    Joined:
    Jun 14, 2013
    Location:
    Sandy Utah area
    So pretty minimal weights, and stability at the end of a 6 inch noga would be modest. hmm. Still looking for a good use of that spot though and this is pretty close to perfect. As a video guy my life revolves around 1/4 20
     
    Rivman1243 likes this.
  9. NLXTACY

    NLXTACY Wits' End Supporting Vendor

    Messages:
    22,014
    Media:
    23
    Albums:
    2
    Likes Received:
    12,549
    Joined:
    Dec 7, 2007
    Location:
    West Hills, CA
    Ha! I came from the film industry cameras support side and everything was developed around 1/4-20, 3/8-16, 15mm, 19mm and Panavision 5/8". That was my world :p
     
    hammerheadfistpunch likes this.
  10. Malleus

    Malleus

    Messages:
    1,225
    Media:
    13
    Albums:
    3
    Likes Received:
    597
    Joined:
    Jan 5, 2017
    Location:
    Charlotte, North Carolina
    What, no rear main driver?
     
    NLXTACY likes this.
  11. nukegoat

    nukegoat

    Messages:
    2,399
    Likes Received:
    2,018
    Joined:
    Apr 11, 2013
    Location:
    San Jose, CA
    Can you update your option list to include speedisleeve?
     
    NLXTACY likes this.
  12. NLXTACY

    NLXTACY Wits' End Supporting Vendor

    Messages:
    22,014
    Media:
    23
    Albums:
    2
    Likes Received:
    12,549
    Joined:
    Dec 7, 2007
    Location:
    West Hills, CA
    Done.
     
  13. alia176

    alia176

    Messages:
    10,248
    Albums:
    1
    Likes Received:
    686
    Joined:
    Aug 21, 2003
    Location:
    Tijeras, NM
    She keeps telling me "stop overdriving".....:lol:
     
    beno and NLXTACY like this.
  14. NLXTACY

    NLXTACY Wits' End Supporting Vendor

    Messages:
    22,014
    Media:
    23
    Albums:
    2
    Likes Received:
    12,549
    Joined:
    Dec 7, 2007
    Location:
    West Hills, CA
    Wait til you stop using toys :p
     
    alia176 likes this.
  15. HDJdreams

    HDJdreams

    Messages:
    141
    Likes Received:
    46
    Joined:
    May 9, 2013
    Location:
    Rocky Mountains
    Perfect timing, my 80 is on jackstands to start knuckle rebuild. Pulled draglink this morning. Happy to see original rod ends were still full of grease after 30 years and 250k miles!

    When are the front knuckle posters coming back in stock?
     
    NLXTACY likes this.
  16. NLXTACY

    NLXTACY Wits' End Supporting Vendor

    Messages:
    22,014
    Media:
    23
    Albums:
    2
    Likes Received:
    12,549
    Joined:
    Dec 7, 2007
    Location:
    West Hills, CA
    I have a couple changes to make to the poster before I remake them. My goal is to send v2 out for production by next Monday.
     
    rolliges likes this.
  17. shocktower

    shocktower

    Messages:
    957
    Likes Received:
    651
    Joined:
    May 20, 2009
    Location:
    Canby Oregon
    I am glad you made this, my son's where not happy with me using their Titanium round stock as a seal driver o_O
     
    NLXTACY likes this.
  18. Travis 76

    Travis 76

    Messages:
    81
    Media:
    1
    Likes Received:
    21
    Joined:
    Jul 11, 2015
    Location:
    Las Vegas
    That thing looks great. Wish I had it 5 years ago. Might be getting one soon though.
     
    NLXTACY likes this.
  19. Tapage

    Tapage Club 4X4 Panamá SILVER Star

    Messages:
    22,837
    Likes Received:
    1,060
    Joined:
    Apr 4, 2003
    Location:
    Panamá
  20. NLXTACY

    NLXTACY Wits' End Supporting Vendor

    Messages:
    22,014
    Media:
    23
    Albums:
    2
    Likes Received:
    12,549
    Joined:
    Dec 7, 2007
    Location:
    West Hills, CA