Results 1 to 8 of 8
  1. #1
    RC Racer
    Join Date
    Jul 2017
    Posts
    221

    Sealing up the front portals.

    So after running my trx 4 in a river for a while I decided to tear it down and clean all the gears and bearings in the diffs and portals. On the front portals there was tons of river water in them and the bearings were locked up.

    I noticed that the rear portals were very clean. Almost like new clean. I assume it's because of the way the front portal is assembled. Where the drive shaft connects to the portal with that bearing is where the water gets in.

    I'm wondering if anyone has found a way to seal it off better than stock.


    Here's a photo of where I think water is getting in and also a photo of it in the river.

    Sent from my SM-N960U using Tapatalk

  2. #2
    RC Competitor
    Join Date
    Oct 2018
    Posts
    53
    I haven't sealed anything, I just pack the bearings, gears, and the axle tubes with marine grease. It prevents the water from getting on the metal parts and rusting. Water always finds a way in, so best option is to protect the metal. I've gotten 2 years on my bearings and they spin like brand new, and I hose my trucks down every run.

    Sent from my SM-G970U using Tapatalk

  3. #3
    RC Racer
    Join Date
    Jul 2017
    Posts
    221
    Quote Originally Posted by Steve g View Post
    I haven't sealed anything, I just pack the bearings, gears, and the axle tubes with marine grease. It prevents the water from getting on the metal parts and rusting. Water always finds a way in, so best option is to protect the metal. I've gotten 2 years on my bearings and they spin like brand new, and I hose my trucks down every run.

    Sent from my SM-G970U using Tapatalk
    That's what I did when I was going through everything. Packed it all full of marine grease. We'll see how it holds up I guess

    Sent from my SM-N960U using Tapatalk

  4. #4
    RC Racer
    Join Date
    Aug 2018
    Location
    Oshawa, Canada
    Posts
    109
    I also pack the bearings with marine grease and have had no issues with water getting in the portals on my rig. My son's truck, however, needed two bearings replaced because they seized up from rust. Maybe he just had back luck.

  5. #5
    RC Turnbuckle Jr. Greatscott's Avatar
    Join Date
    Mar 2004
    Location
    N. Idaho... Da Sticks!
    Posts
    7,445
    Quote Originally Posted by Trailwalker View Post
    I also pack the bearings with marine grease and have had no issues with water getting in the portals on my rig. My son's truck, however, needed two bearings replaced because they seized up from rust. Maybe he just had back luck.
    Its not bad luck, its just the nature of the beast. When you run in submerged conditions a lot you have to do a lot of maintenance or accept you will have to rebuilds with part replacement.
    Submarine Qualified, Chief Inducted, Navy Retired

  6. #6
    RC Racer
    Join Date
    Aug 2018
    Location
    Oshawa, Canada
    Posts
    109
    Quote Originally Posted by Greatscott View Post
    Its not bad luck, its just the nature of the beast. When you run in submerged conditions a lot you have to do a lot of maintenance or accept you will have to rebuilds with part replacement.
    For sure, I get that, my son does not.

    I do have a feeling that the added grease everywhere is creating more internal resistance, which is probably why my truck never has great run times.

  7. #7
    RC Racer
    Join Date
    Jul 2017
    Posts
    221
    Quote Originally Posted by Trailwalker View Post
    For sure, I get that, my son does not.

    I do have a feeling that the added grease everywhere is creating more internal resistance, which is probably why my truck never has great run times.
    It definitely slows it down at high speed but I haven't noticed an impact on runtime. I'll time it next time I run it

    Sent from my SM-N960U using Tapatalk

  8. #8
    RC Qualifier
    Join Date
    Feb 2017
    Location
    UK
    Posts
    443
    I don't pack my portal with grease at all - just a light coating is all I find that I need.

    Then again, I rarely run through water anyways...…

    From around 4:55 :

    https://www.youtube.com/user/iftibashir

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •