Power Seat Eats Replacement Gears

Discussion in '80-Series Tech' started by MidMO450, Dec 23, 2011.

  1. MidMO450

    MidMO450

    Messages:
    50
    Location:
    Columbia, Missouri
    I purchased a '96 LX450 a few weeks ago. Both power seats were hung up, but the motors were working. I bought the Gamiviti replacement gears and end cap and installed on the driver seat without any trouble. I dropped the seat back in and it worked fine... for a few minutes. Once again the gear drive was stripped. I pulled the seat and confirmed that the gear was trashed. I removed the entire assembly and cleaned out all the ground up plastic then installed the second gear (intended for passenger seat). I didn't tighten the nut on the end of the worm gear as much this time thinking it would allow the gear to turn more freely, but ended up with the same result. I don't see anything else that appears to be out of spec. Seems like an easy fix, so I'm not sure what's going on. Any thoughts would be appreciated.
  2. BrotherRob

    BrotherRob

    Messages:
    3,650
    Location:
    Scottsdale, AZ
    You're on the right track by not over tightening the nut. I made that mistake once, loosened it the second time and no problems since.
  3. robertaleon

    robertaleon

    Messages:
    571
    Location:
    Sacramento, CA
    Also make sure both rails are parallel; get the seat either all the way fore or aft to start before reinstalling. May need some vise-grips or channel locks. That's what happened the first time I put a set of gears in; basically the seat was racked by two screws and chewed up my first set of gears.
  4. western flyer

    western flyer SILVER Star

    Messages:
    1,507
    Location:
    San Diego
    x2 on getting both rails lined up. I bet this is your problem. I just reworked both of mine while adding the LT seat brackets.

    You might need to remove the seats to see what needs to happen. My rails were not lined up after the little white cap popped off the slave motor. With the cap off the powered motor moved one rail, but the slave motor was slipping, allowing the two rails to no longer be aligned. I used a battery (14.4 v drill batt) to power the seat motor while it was out (so as to get them lined up again). Then I put the cap back on.
  5. FJ809496TLC

    FJ809496TLC 80 series addict SILVER Star

    Alignment and lubrication.
    Last edited: Dec 24, 2011
  6. wareagleash

    wareagleash

    Messages:
    53
    Location:
    Chattanooga, TN
    I wish there was a way to convert these things to manual....
  7. Marc311

    Marc311

    Messages:
    937
    Location:
    Northern Virginia
    x100 on alignment.

    If they aren't perfectly square, it is amazing how poorly they work. If installed right, the holes on the rails should line up almost perfectly with the holes in the floor. If you're having to force/fight/twist - they're aren't lined up right.
  8. Michael Hanson

    Michael Hanson

    Messages:
    7,380
    Location:
    Plano texas
    Id pull the seat out where you can work on it easier. MIke
  9. MidMO450

    MidMO450

    Messages:
    50
    Location:
    Columbia, Missouri
    Based on what I'm hearing it sounds like alignment may be the culprit. I don't think alignment would be a big issue as long as they are close until you hit the stop on the left and the right keeps going. Ordered another set so we'll see what happens this time.
  10. harrydunn

    harrydunn

    Messages:
    895
    Location:
    Columbia, Missouri
    If you need some help, let me know. I'm just up the road from you. :hillbilly:
  11. Pequod

    Pequod

    Messages:
    18
    Same thing happened to me, had to order another set from Gamiviti. This time before I screwed in the cap flush I used some white glue around the threads and added some duck tape for added security. It's been about month, the cap hasn't fallen off nor has it stripped again, knock on wood.

  12. MidMO450

    MidMO450

    Messages:
    50
    Location:
    Columbia, Missouri
    So I ordered a second set of gears/caps from Gamiviti and worked on the driver's seat again this weekend. I pulled the entire assembly, lubed it very well, made absolutely certain the rails were aligned in the full rear stop and put it all back together. I pushed forward on the controls and it worked perfectly. I thought I had done it... finally. However, a few minutes later I went all the way to rear stop and it hung up again. I didn't want to force it, so I helped the left rail along (this is the side that eats the gear) with a ratchet as I went forward with the control. Long story short, I'm right back where I started. If anyone has ideas/thoughts let me know. I think I could do the repair blindfolded by now and am frustrated, as I don't see any glaring reasons for the continued malfunction.

    Just added my Cooter avatar, so maybe that will help. I'm open to anything right now.
    Last edited: Jan 9, 2012
  13. harrydunn

    harrydunn

    Messages:
    895
    Location:
    Columbia, Missouri
    Cooter would refuse to work on it unless he could replace it with a metal gear. Plastic? Really?!?

    [​IMG]
  14. Brentbba

    Brentbba Former Golfer SILVER Star

    Messages:
    9,068
    Location:
    The OC, CA
    Until I saw your post #12, I'd have said alignment as well. I trashed my first replacement gear also because the alignment wasn't right. While it's not difficult, it certainly is a PITA to take the seat out and put it back in. Second gear, knock on wood, is doing just fine.
  15. MidMO450

    MidMO450

    Messages:
    50
    Location:
    Columbia, Missouri
    I agree with you harrydunn that I wouldn't have this problem if both the worm drive and gear were metal. How about you start up a business that manufactures the gear from metal?
  16. profro

    profro

    Messages:
    398
    I too have just wasted money on the gears and time to fix this. In my opinion the Gamiviti gears are too brittle. I spent quite a long time making sure the rails wear parallel with a ruler even and from the first movement the left side stripped. All this with the seat not installed but upside down with just the electrical connector inserted. It couldn't even move the the rail with no weight in the seat. To boot, the Gamiviti cap even stripped out when I installed it.

    I can not and will not recommend Gamiviti gears to anyone I know asking. Waste of time and money.
  17. azcromntic

    azcromntic

    Messages:
    465
    Location:
    Colorado Springs
    Okay, so where are you going to get the gears then? That's the only place I know of. Just curious because I need to fix my gears.

    Wondering if the placement of the plastic gear on the metal rod has anything to do with it. If you didn't get the plastic gear far enough "down" then it wouldn't engage fully with the ?worm gear? inside. It'd be working off of the top of each of the teeth
    on the plastic gear instead of biting into the thicker part of the gear.

    Just wondering.
  18. SpillmanCruiser

    SpillmanCruiser

    Messages:
    319
    Location:
    Baton Rouge
    gear

    I have the same problem and agree that the Gamviti gears are not the highest quality, but what else you gonna do? I'm ordering some more today because I'm about 3" too close to the wheel and the damn thing won't go back!
  19. profro

    profro

    Messages:
    398
    I am looking into sourcing a nylon helical gear that matches the tooth profile and pitch. However most helical gears have hubs. So if I can find a gear to work it may still need to be modified i.e. removing the hub. If I am successful I will post up my results.

    In the meantime I will reset using a boxend wrench.
  20. nemoblackdog

    nemoblackdog

    Messages:
    54
    Replacing those gears is a very finicky process and if it's not all "just right" stripping the new gears is very easy to do. In mine, it turns out the threads where the little end cap fits were stripped. Once that pops out, it's certain death for the new drive gears. I finally gave up and disconnected the mechanism from the stripped side (removed the screw-drive rail assembly.) The remaining rail can drive the seat back and forth, but I've just put the seat into its rear most position and strive to leave it there. My wife is the passenger 99.999% of the time and she's happy to have it all the way back. If I need to move it forward for some reason, I can move the seat forward without the passeger sitting in it to keep the load light on the remaining single rail. A hack, but less frustrating than dealing with that crappy little gear anymore.

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