Over/Under Drive

[FunkMasterFlex]

Sorry if there’s a post about this somewhere, I couldn’t find it but is anyone running any overdrive in the gen8? Iv seen underdrive gears to replace in the rear and iv seen a transfer case that looks like the better option but they’re sold out everywhere? Any info or opinions would be awesome

 

[White Bear Smith]

Interested as well I am a newbie


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[FunkMasterFlex]

Well the idea of it is to rotate the front tires at a higher speed than the back in turn making it easier to go up steep inclines and making the turning radius better as well. I just haven’t heard much of anyone running anything like it

 

[Bob_in az]

There's a bunch of guys in the gen8 facebook group running the T-Real overdrive gears in the front & a few guys running the redcat underdrive gears in the rear. No issues, but keep in mind that everything is a trade off. Better climbing & turning, but sidehilling & downhill suffers a little.

 

[themountain]

43/13 underdrive in the rear is the sweet spot in my rig."thumbsup"

 

[FunkMasterFlex]

I didn’t think about sidehill or downhill at all to be honest and I kinda pride my gen8 in that area, I just kinda assumed it was going to be hard on something binding up and what not but if there’s people running them with no problems I think I’m gonna try me some out

 

[Hkguy00]

There's no binding up at all the fronts just over driven a little. The wheels spin faster up front vs the rear & it wont negatively affect Side/Downhilling at all. the name of the game is Crawling, when you crawl the wheels dont spin fast enough to do anything let alone cause any issue on side hills. but I can definitely attest to the fact it comes in handy when you need to hit that throttle to get up a steep hill.. The T-real overdrive gears work great I highly recommend..

 

[ferp420]

over under is a preferance thing and the type of terain makes a big differance i dont run over under in my scale rigs cause most of my crawling is on large bolders and the front and rear are almost always on the same surface so the over/under realy hurts in that situation a simple test is a car windshield vary slick and a good angle with matching gear sets the front and rear tires work together and the rig will climb if you over/under the gears the tires fight each other and the rig wont climb you will always be draging the back tires around
if your running a course were the front and rear tires arent on the same surface like small stacked rocks then it will help it also helps you climb and decend but will kill your sidehilling it will also help with turning and some say it helps keep the rig tight to the rock slightly compressing the springs a bit creating a huging affect and helps a bit with your center of gravity in a faster rig like a rock racer it helps keep the rig going in a straight line with less bucking or washing out

most comps are tight technickle courses so most comp rigs use over/under they need every advantage they can get for the type of courses they run

scaling or trailing there isent realy a need for the over/under but some people like it personaly i dont but that mostly has to do with the type of terrain i have to crawl on

 

[xtreme4x2]

My dang screw stripped in the spool. even with heat applied. Gotta get a new spool, but I'm glad folks are having positive results with it.

 

[andrew_deaton]

Im running the over drive gears in the front axle on my gen 8 I really like it seems to do much better up hill and pulling its self over an obstacle"thumbsup"

 

[Jammied]

I had the screw head strip on one ounce. Actually 2 screws at the same time. I took a small drill bit and drilled/chamfered the screw until the gear would come off. Then there was enough screw left that I used a pair of pliers to grab the screw and screw it out. A left handed drill bit probably would have screwed the screw out.

 

[HumboldtEF]

snip



downhill suffers a little.

Just wanted to add that descending is actually improved because the front is doing more pulling than the rear. This helps to keep the rear down lessening the chance of it flipping over on its lid.

You are right about side hilling suffering though. With overdrive and the front and rear running at differnet speeds there will inherently be some slippage and while side hilling this slippage usually results in sliding downhill a bit when you may be trying to either climb or track level with the slope.