09-12-2019, 03:28 AM | #21 |
Pebble Pounder Join Date: Jun 2018 Location: New Zealand
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| Re: New SSD Overdrive Gears |
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09-12-2019, 06:43 AM | #22 |
RCC Addict Join Date: Aug 2008 Location: Paulina
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| Re: New SSD Overdrive Gears |
09-12-2019, 12:02 PM | #23 |
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09-13-2019, 10:41 AM | #24 |
I wanna be Dave Join Date: Jan 2005 Location: Raleigh-ish vicinity
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09-13-2019, 02:08 PM | #25 |
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09-13-2019, 07:03 PM | #26 |
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09-21-2019, 05:58 AM | #27 |
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| Re: New SSD Overdrive Gears |
09-21-2019, 11:49 AM | #28 | |
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09-21-2019, 12:50 PM | #29 |
I wanna be Dave Join Date: Jun 2017 Location: Humboldt county
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| Re: New SSD Overdrive Gears |
09-21-2019, 01:05 PM | #30 |
Rock Crawler Join Date: Mar 2019 Location: Terrassa
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| Re: New SSD Overdrive Gears |
10-01-2019, 04:10 PM | #31 |
Newbie Join Date: Jan 2019 Location: Wyo
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| Re: New SSD Overdrive Gears
Ok, I ordered a set and received them on Monday. I put everything back together last night and the axle feels... lurchy? That's not a word, but it describes it pretty well. It feels like when you turn a motor by hand. I have never rebuilt an axle, but this seems excessive. I can turn the axle by twisting the input shaft, but it isn't smooth at all. It's not crunchy or grindy. It just kind of binds for a split second and then lurches to the next bind. It is very odd. I took everything apart and redid everything again to make sure. It feels decent without the diff cover installed, but as soon as i install the cover it goes right back to the weird lurchy feeling. I have taken it apart 4 different times and have tried 2 different kinds of grease. I did my standard small amount of grease which didn't help, and then i went ahead and packed it. Nothing changes. Is this normal? Should i just throw it back under the truck and go? Or is there something wrong? Thanks! |
10-01-2019, 04:52 PM | #32 |
RCC Addict Join Date: Feb 2016 Location: Santa Maria, CA
Posts: 1,751
| Re: New SSD Overdrive Gears
You're not alone. I installed a new set of SSD OD gears yesterday with less than stellar results. On initial assembly, gears were pretty much locked up tight. The pinion depth is too shallow (too close to the spool) so even shimming the carrier/ring gear as far away from the pinion as possible (I was able to shim it 0.2mm/0.008"), it's still tighter than I can rotate with my fingertips. I chucked the pinion up in my drill press and carefully ran a file on the backside of the pinion head (just enough to smooth out the ridges from machining, making it shiny) and it made a minor improvement, but it's still tighter than I like (feels notchy when fully assembled while rotating with my fingertips.) I might just run it like this and see if it beds in (I did spin it for a couple minutes with my cordless drill) otherwise I'll be taking more material off the back of the pinion. This is the first SSD product that I have NOT been satisfied with. Here's another weird thing about it... In 1:1, mixing and matching pinions is a big no-no, since the pitch (if that's even the right word?) of a helical cut pinion gear of a given tooth count (in this case 8t )**is different, depending on the tooth count of the ring gear (like our 27t "overdive" vs stock 30t.) Since there's much less on the line with an rc car, I gave it a shot anyway and the stock Axial 8t pinion runs smoother with SSD's 27t ring gear than SSD's 8t pinion, still not what I would call smooth though. I don't know if it's just the few thou' extra on the back of the SSD pinion gear, or a proplem with the pitch of the pinion and/or ring gear, but it's still not right. |
10-01-2019, 07:13 PM | #33 |
I wanna be Dave Join Date: Jun 2017 Location: Humboldt county
Posts: 4,482
| Re: New SSD Overdrive Gears
Thats unfortunate, I have a set on the way so I'll check back in with my feedback. One thing (thats entirely conjecture) I have noticed is that a small handful of theads involve folks with crunchy diffs and it seem like a few of them used SSD housings. I didn't follow all of them to their resolutions but one was resolved by swapping housings. Again I'm entirely guessing but I wonder if the housing has anything to do with it? Assembling the stock diff gears took some shimming for me to feel good about the fit, and they still seem a tiny bit on the crunchy side, not bad but not perfect. Last edited by HumboldtEF; 10-01-2019 at 07:15 PM. |
10-01-2019, 07:46 PM | #34 |
Gold Star Baby! Join Date: Dec 2017 Location: Las Vegas
Posts: 2,554
| Re: New SSD Overdrive Gears
In my experience switching to SSD housings from stock axial made the mesh better. Partially because of the separate, and metal, bearing retainers. Instead of relying on the diff cover to seat the bearings. But they all take some work/shimming. I think LetterJ was installing his in a Capra, like I did, and I had the same issues. Just read on fb that the HR gears didn’t fit well in the Capra axle either. |
10-01-2019, 08:19 PM | #35 |
I wanna be Dave Join Date: Jun 2017 Location: Humboldt county
Posts: 4,482
| Re: New SSD Overdrive Gears
That reminds me my Ascender had issues if I cranked the diff cover (a metal one) screws down tight so I would back them off just enough to maker the gears happy. What I imagine happening was the metal cover when tightened down was slightly warping the axle, at least enough to make the gears unhappy. Again just more guesses and what if's so dont take me too seriously |
10-01-2019, 08:25 PM | #36 |
Gold Star Baby! Join Date: Dec 2017 Location: Las Vegas
Posts: 2,554
| Re: New SSD Overdrive Gears
I think your intuition is spot on here. I had to tighten, loosen, and repeat several times on the Capra front diff cover to get a driveable mesh. Certainly some type of contribution there.
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10-01-2019, 11:21 PM | #37 |
Quarry Creeper Join Date: Jun 2009 Location: Abbotsford BC Canada
Posts: 236
| Re: New SSD Overdrive Gears
Just installed mine in my OG Cherokee 10.2 kit axle cases with the red Diff covers..Did the loosen/tighten method as well.A healthy application of marine grease.They seem smooth enough to run.I can spin with my fingers but certainly not perfect.Will they they bed in I wonder?.Will test when I get my truck back together.
Last edited by xv-townboy; 10-01-2019 at 11:41 PM. |
10-02-2019, 02:27 AM | #38 |
RCC Addict Join Date: Oct 2014 Location: UK
Posts: 1,516
| Re: New SSD Overdrive Gears
We did our testing in SSD housings so haven't noticed any problem. I will try it in the Axial housings and see if there is a slight tolerance issue between different housings.
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10-02-2019, 05:55 AM | #39 | |
I wanna be Dave Join Date: Sep 2019 Location: US
Posts: 2,408
| Re: New SSD Overdrive Gears Quote:
~ More peace, love, laughter, & kindness would make the world a MUCH better place Last edited by Panther6834; 10-02-2019 at 11:38 AM. | |
10-02-2019, 06:51 AM | #40 |
Gold Star Baby! Join Date: Dec 2017 Location: Las Vegas
Posts: 2,554
| Re: New SSD Overdrive Gears
I read on FB that the HR gears didn’t have a good mesh in the Capra either. Leaning towards there being some slight difference in the Capra housing, but we shall see.
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