Kyosho 8x10mm diff shim kit

[frddyj]

A lot of guys been asking which shims to use for diff shimming. The Kyosho diff shim kit (part # 96644) has 10 of of each thickness .1, .2, and .3 (30 shims) and I found on eBay for $5.

Perfect size for shimming your diff out drive cups and lower shaft in your trans.

 

[maximusraylius]

nice frddy .. that should help out alot of fellas here that are looking for the right sizes ...

 

[ditchdigger]

Hay Fred where on eBay did you find those shims looked under kyosho no luck.

 

[frddyj]

do "kyosho 8x10 "

 

[tallone09]

hers you go http://cgi.ebay.com/Kyosho-Inferno-...emZ370492155454QQcategoryZ34061QQcmdZViewItem

 

[tallone09]

hers another on http://cgi.ebay.com/Kyosho-Inferno-...emZ370492155454QQcategoryZ34061QQcmdZViewItem

 

[ditchdigger]

8x10

Ahh... Thanks bro:bad pc:

 

[tallone09]

Ahh... Thanks bro:bad pc:

your welcome glad i could help

 

[turboit]

just a note... these will not work on the hpi diff cups. I believe it will only work on the cen diffs. Hpi diff cups take 10mm id shims.

 

[frddyj]

just a note... these will not work on the hpi diff cups. I believe it will only work on the cen diffs. Hpi diff cups take 10mm id shims.

the outdrive cup takes a 8mm x 16mm bearing so a 10mm id shim would be 2mm too big.

 

[turboit]

frddy I thought so too. I bought these kyosho shims and they will not fit over the outdrives on my aluminum hpi diff cups 🙁

 

[frddyj]

they will work.

you should be shimming the ring-gear side of the diff as you want to shim the ring gear to the pinion (after checking/shimming the pinion to the ring gear of course). The ring gear takes an 8mm x 16mm bearing and this shim is the same i.d. as the inner race. i just shimmed my bullet proofs with these.

the other side of the diff (on hpi savage cups) takes a 10mm x 16mm bearing and if you shim this side of the diff, you'd be shimming the ring gear away from the pinion which would create more slop and negate the reason your shimming in the first place.

if you have nova-hellfire cups (like i used), the shims could work on either side.

so, it would be correct that these shims wouldnt work but only if your shimming the diffs backward.

 

[rikkidy]

Anyone have a link to you tube or something on rebuilding these? I launched mine today and don't have a clue on were to start fixing it. Bullet proof sounds good to me, what about true posi?
Thanks in advance.

 

[Mattsavage92]

Ok so are the rear diffs not possi?? And how do you "bulletproof" the diffs? And what is the purpose of shimming the diffs? Sorry I know I sound truly special... Ty for your help!!

 

[Clifffff]

Ok so are the rear diffs not possi?? And how do you "bulletproof" the diffs? And what is the purpose of shimming the diffs? Sorry I know I sound truly special... Ty for your help!!

It is possible. The purpose of shimming is to reduce the gap between the differential ring gear and the bevel gear so they mesh nicely. There are ways to shim your differential that actually increases the gap between the two gears, with horrible consequences.

See the photo attached. It is from a Savage diff shimming video the link to which you will also find below. Just play the clip on mute because of you are genetically predisposed, the soundtrack may cause you to experience homicidal tendencies.

As for the size of the washers or shims required, they are: 8 x 10 x 0.2 mm and 10 x 12 x 0.2 (internal diameter x external diameter x thickness). If you wanna be really anal, you can also get some in 0.1 mm thickness. You can purchase them in 50s or 100s on AliExpress. Just search for "ultra thin washer"....

 

[Mattsavage92]

Thank you!! I ended up buying a whole new "bullet proofed" rear diff... I put it in got my baby all put back together! Went to drive her last night.... And well I think I put the diff on backwards?? Front is going forward with the rear is going in reverse so it's just pulling against itself trying to rip itself in half.... I didn't think that was possible? Cuz it slides in the groove? So I am going to take it back apart and try it the other way.... It's crazy as it may seem I am not new to this hobby... But I am new to HPI totally different world than Revo that I am used to... Lol

 

[Mattsavage92]

I also want to say thank you so very much to everybody on this forum for all your help and support it's really been a lifesaver and you guys are absolutely amazing I appreciate everything so much!! Idk what I would do without this forum lol

 

[Clifffff]

Yes, it is absolutely possible to install the differentials incorrectly.

For the front, the ring gear should be slightly on the right side whereas in the rear, differential's ring gear should be slightly to the left side of the vehicle.

The rule of thumb (literally) is to expand your right hand with palm facing the found and imagine your 4 fingers as being the ring gear and your thumb (which points to the left) as being the diff housing. Now if you do the same with your left hand, your thumb will be the diff housing and your four fingers would be the ring gear.

The enclosed image is of the front differential.

 

[Mattsavage92]

Yes, it is absolutely possible to install the differentials incorrectly.

For the front, the ring gear should be slightly on the right side whereas in the rear, differential's ring gear should be slightly to the left side of the vehicle.

The rule of thumb (literally) is to expand your right hand with palm facing the found and imagine your 4 fingers as being the ring gear and your thumb (which points to the left) as being the diff housing. Now if you do the same with your left hand, your thumb will be the diff housing and your four fingers would be the ring gear.

The enclosed image is of the front differential.

Well that's like really awesome and easy to follow! Lol thank you very much man another thing I did wrong was I took literally the whole rear end out in order to get to the death I didn't realize it was just the four screws so I most definitely won't be doing that this time around... Now the dip I bought has spacers already in the rear diff should I add more? Or do I just want it to be snug to the bearing? Again man THANK YOU!! Have no idea how much I truly appreciate the help!! I honestly wish I knew more so I could be more involved and help others on here... Lol but threw ALOT of trial and error and everyone's help I'm begging to understand ALOT more!

 

[Mattsavage92]

Another question I have... I bought a Savage XL 5.9 GTXL-6 - DIFFERENTIAL 29t Flux GT-6 Front or Rear Diff HPI 160102 the guy I bought it from said it should work and it did fit! But that couldn't be the reason it's going back wards right??

 

[Clifffff]

Another question I have... I bought a Savage XL 5.9 GTXL-6 - DIFFERENTIAL 29t Flux GT-6 Front or Rear Diff HPI 160102 the guy I bought it from said it should work and it did fit! But that couldn't be the reason it's going back wards right??

HPI#160102 is the number for one of the many 1/8 Savage Nitro/Flux Monster Truck models that HPI offered over the years.


I am inclined to bet that the differential you have in your hands was taken out of a HPI#160102 Savage Nitro Truck. You see, in certain circumstances, RC car manufacturers, just like their slightly bigger brethren (think Plymouth, Saturn, Oldsmobile, Pontiac...) lose the game of super capitalism and inevitably go under. In the RC context, in such situations, after all pensions have been rescinded and all patents and trademarks sold for a few bucks, there still remain thousands of RTR units as well as car kits in neat boxes in the warehouses and inside stores... That's when a type of business folk come in and buy those remainder stock at a very good price so that the newly bankrupt enterprise can more easily breach its contract with the warehouse owners and terminate the contracts it has with its own dealers and distributors worldwide.

Anyhow, from this point on, RTR RC cars and RC car kits lose those designations and turn into "core parts" and "dead stock". In the former category fall differentials, wheels, TVPs, center gearboxes, dogbones, drive cup shafts, nitro engines, filters, engine stands, spur gears, clutch bells, ESCs, motors, batteries, shock absorbers and a few other things. In the latter, fall the little Phillips screws, the washers, body clips, those worthless ball-bearings and every other tiny part that doesn't cost more than a buck at retail.

And so, it becomes easier for us after a while to even remember that a company called HPI even existed. At the same time, a few large warehouses have become empty before the end of their lease contracts, some folks have earned a bit of money and you got yourself a bitching differential which if you shim well and maintain properly, should not fail you anytime soon...

 

[Clifffff]

Another question I have... I bought a Savage XL 5.9 GTXL-6 - DIFFERENTIAL 29t Flux GT-6 Front or Rear Diff HPI 160102 the guy I bought it from said it should work and it did fit! But that couldn't be the reason it's going back wards right??

No. I got similar differentials in my Savages. Same gear ratio. Only they were not manufactured by HPI. I think the seller told me they was hand-made in a huge manufacturing hub in Xinjiang Autonomous Region that instead of monetary salaries and bonuses offered free education to its workers at night.

Sorry...I got me sidetracked again... No, the symptoms you describe can only be attributed to a differential that has been installed incorrectly.