40 series tire/gearing

[craig-revo]

I had considered purchasing a set of big joe tires for some off-road bashing but am uncertain about the larger size. Would it be a good idea to change my gearing if I installed a larger tire? Anyone have a set of big joes? Also, I'm about to install the foc kit. Is there anything I should change in the tranny while im in there?

[Third Coast RC]

craig,
I installed the foc kit, it was simple. Why I was installing it, I also changed to the close gear ratio from wide. As for your gearing, I would go ahead and try the tires, if you decide you want higher or lower gearing, just change the spur gear - cheap solution, they are like $3. What gearing do you have now?

Hope to be helpful,
Justin
Revo 3.3
Slayer Pro
Slayer 4x4
Jato 3.3
4-Tec 2.5

[craig-revo]

Third Coast RC,
What difference did the close ratio make? My gearing is stock at the moment.

[jarod_rodriguez]

I took my Big Joe's off. Look nice, but seem to be a bit too much for the truck IMO with stock gearing. I had intention of changing the gears, but never got around to it. I will do it again one day.

[KillerRevo]

I have a set, with stock gearing it will bog down. I tried them out a couple times with stock motor and gearing but won't use them again til i have upgraded the motor and tranny gears. I have a 40T spur gear that helps but not enough to make it worth while for the big joes. upgrade motor or gearing before buying them. Al has a set but he has a sweet motor to turn them nicely without any power loss.

[Al Morancy]

LOL timing is everything, I should have read this before I posted my question, the maxx spins them just fine but I stripped the first gear side of the gear set today, not on the big joes but the 40 series Mobe's, they are heavier than the joe's on the proline beadlocks, I don't know how much heavier, haven't weighed them but by feel they are heavier. I was running a 38 spur on that for a while with out issue,, so I have the same question as to what is the best gear set in plastic before I dump RR gears in it like the turbo revo. I want to try it with plastic first but I'm not sure what set is best for power.

I have a set, with stock gearing it will bog down. I tried them out a couple times with stock motor and gearing but won't use them again til i have upgraded the motor and tranny gears. I have a 40T spur gear that helps but not enough to make it worth while for the big joes. upgrade motor or gearing before buying them. Al has a set but he has a sweet motor to turn them nicely without any power loss.

[lubecakes]

If your engine revs high, like over 40,000 rpm, then you want the close ratio set.
I would stick with the wide set on a picco 28.

[kgombe1]

wide ratio has a bigger jump from first to second... so the gears lash harder and the engine rpms drop allot more.... Close ratio keeps the engine RPM's high in the power band and the shift is almost seamless... for high speed runs its not worth it.. but for running in the grass and bash around.. i would take the wide out and go with either close or standard.... in a drag race... with both vehicles being the same... at 132f the car with wide ratio will loose to a revo with standard ratio....

[lubecakes]

Yes but with a turbo .28 the wide will be fine.

[Al Morancy]

Yes but with a turbo .28 the wide will be fine.

The tranny that went is on a .26 Maxx, the 28 is all steel, I know what I'm going to do, they are cheap anyway, get a set of each so I can do some testing and be able to form an opinion, lol those tires are nice for sure, but they are heavy, it's dry here today and I have a set of Mashers on the stocker, I'm going to burn a few tanks beating on it and see if I can break something, the truck comes with standard gearing right, the guy i got the cf revo from must have put wide in it. Too bad you can't mix them, I have a spare standard gear but this all started for me when I tried to put the tranny back together and it wouldn't spin right.

[insanity]

My manual seas its a wide ratio out of the box.

[lubecakes]

Yeah 3.3s have wide, 2.5 is standard, and platinum is close.

[detoboy1]

thanks for sharing that little gem with us LC. handy to know what each revo gearbox comes standard with.

[Al Morancy]

Awesome, that is what I had for spare parts, Wide, prior owner changed to close if I'm counting the teeth right, so I just changed out both gears with spares and it's good, put the M2C clutch on the other maxx and just pounded both of them hard, no problems, the real test is the beating they take on the track down back, rougher than heck, lol not much comes back up to the shop under it's own power after a beating on that thing, the 2 maxx's are as close to good as I can get them right now, I'm taking some fuel and both of them for a beating. Mashers vs Mobe's we'll see what gives first.

[Al Morancy]

My manual seas its a wide ratio out of the box.

yep my bad, just figured out the trick to the parts manual, not bold type is stock, LC can't make it any clearer than that, thanks.

[Jugghack2]

try a close ratio trans gear set and a 14 tooth bell with 40 sper and you'll be in good shape with a 3.3 and pipe

[sandysnowman7]

I don't understand why you guys are talking about re-gearing..? I just ordered up a set of Axial 8spoke bead-locks and 40 series Big Joe's. The specs say they are 6.39" OD and the stock Revo tires are 6.3"...

[lubecakes]

It's about the weight of the tires/wheels. The big joes are alot heavier and wider.

[danyvw]

I don't understand why you guys are talking about re-gearing..? I just ordered up a set of Axial 8spoke bead-locks and 40 series Big Joe's. The specs say they are 6.39" OD and the stock Revo tires are 6.3"...

Just wait to see them on your truck and you will underestand why people are talking about re-gearing. They are huge, wider and very heavy.

[Jugghack2]

also keep in mind only the latest version had the big 6.3" tires ther rest of us have 5.75" tires so even lighter

[sandysnowman7]

Yeah, I have a new Revo, just produced a few months ago. Came from the factory with 6.3"x3"x3.8"R tires and wheels. From most everything I've read all the 40 series tires are the same size as what now comes stock on the Revo. This is the first time I've seen anyone talking about a need for re-gearing or anything because of switching to Big Joe tires. Obviously we may be talking about different Revo versions all together.

[danyvw]

Yeah, I have a new Revo, just produced a few months ago. Came from the factory with 6.3"x3"x3.8"R tires and wheels. From most everything I've read all the 40 series tires are the same size as what now comes stock on the Revo. This is the first time I've seen anyone talking about a need for re-gearing or anything because of switching to Big Joe tires. Obviously we may be talking about different Revo versions all together.

I was reading a post when you said you have an OS 21TM, you don't have to worry about re-geering, your mill has plenty of low end power to move any tire you put on it.

[Al Morancy]

Snowman, the issue to be concerned about is if you tape the tires, you'll see the difference when the tire is not all ballooned up and turning into a pizza cutter and it's stays flat and all that rubber is grabbing the ground, any mill will spin up a 40 series tire if it's not taped, it's like night and day. Sense I've put on the 3 different sets of PL 40's on PL beadlocks and taped them all, I've busted a shaft, stripped a gear and busted a pinion in the XL. But I would still tape any of these tires again, I am going to try the standard ratio in one truck to see if that lightens the load a bit, if I strip out another plastic gear Robinson Racing has the soluation, I have there gears in one tranny now, they may end up being in all three. Good luck

[danyvw]

Al, need some update about how was everything with the standard ratio or if you had to put the RR gears. Yesterday ripped for second time in two months the input gear. I have the 40 series trenchers taped using the wide ratio with an OS .18TZ, the engine can handle the extra rotation mass but as you can see the tranny is giving up. I don’t know which one to buy. Thanks buddy.

[lubecakes]

Go standard ratio for "all around" gearing.

[Al Morancy]

With the RR gears using both Wide and Standard no issues with the steel drive gear, none, but they are going to be getting a new test soon, I'm putting an LRP spec 2 .30 in a revo with a Buku clutch and pipe, it's ripping the heck out of the XL gear box, this is because of the power this clutch is tranfering to the ground, that's a good problem, RR doesn't have a kit for the savage like it does for the Revo, so this should be a great test for the drive train. I really like this LRP mill, I have a couple of gallons on it now and it's in the zone, great power, it would stand up the Xl with 40 series Mobes and bead locks all the way across the yard and then rip the idle gear to shreads, lol you can get just the drive gears in steel if you want, but I like all steel everything. Thats just how I do it. Good luck bro.

[danyvw]

Thank you.