revo tranny - RC-Monster Forums

overtki11 · **revo tranny -** 11.05.2006, 10:36 AM

hey guys, need to pick your brains a little..

i understand that the revo tranny has some optic blah blah blah.....is this for safely shifting into reverse (does it even have reverse??) or for safely shifting into 2nd?

can i run this tranny without having to use this optic blah blah blah???

TIA dudes!

MetalMan · 11.05.2006, 11:59 AM

It's for shifting from forward to reverse.

squeeforever · 11.05.2006, 03:21 PM

Yup. All it does is monitor the RPM's basically. When the tranny comes to a complete stop, it allows you to go into reverse without ripping the tranny to pieces. You don't need it... A FOC is wise....

overtki11 · 11.05.2006, 09:40 PM

cool thanks guys.
so there is a mechanical lever on the gearbox thats servo activated?

so if i wanna use forward only, do i have to lock it in place or can i just leave it alone.

thanks in advance guys.

BrianG · 11.05.2006, 09:49 PM

All the Optidrive does is interrupt the signal going to the shifting servo if it sees the speed is geater than 0mph. That's it.

There is a forward-only kit which removes all unnecessary gears, and gives you parts to cover the Optidrive sensor and shift fork shaft. This makes the tranny simpler, lighter, and stronger (one of the replacement gears is wider).

You don't want to use the stock reverse system with BL as the reverse gears will shred in no time. I don't know how many people over at the Traxxas forums have wrecked their reverse gears. Some of it must be the fact that the Optidrive is not operating quite right and allows the shift when still moving, some the fact that the reverse is a bit weak. If it can't hold up to Nitro, there is no way it will handle BL power!

JThiessen · 11.06.2006, 10:16 AM

The opti drive system in mine was a POS. I removed it and just ran without.

overtki11 · 11.06.2006, 10:17 AM

you guys have been a great help! thanks!!!!

now to go hunt one down on evilbay...

JThiessen · 11.06.2006, 11:48 AM

What are you looking for? The whole tranny, the optidrive, or the forward only? I have all three ready and waiting for someone!

overtki11 · 11.06.2006, 08:35 PM

Quote:

Originally Posted by JThiessen

The opti drive system in mine was a POS. I removed it and just ran without.

sorry dude...what's POS?

also, thanks for your offer...but i'm really not sure what i need or dont need......so i have to clarify some things. hope you dun mind answering some nitro newbie Qs.

the entire tranny includes? the spur/slipper gear and the brakes?

the optidrive is the sensor in the tranny? or is it the special revo receiver? (or will it work with any regular receiver?)

the "forward only" is a hopup? is it made by traxxas too?

ok, maybe if i tell you what i wanna do that would help.

i want to nitro-rize an ep truck.???? why? haha dun ask....hahahaha

it would be great if i could shift into reverse as well but if its gonna take loads of extra parts & electronics then i'd rather leave it "forward only"

which brings me to the last point.....can i go forward only without having to put in a "forward only conversion" or is there a danger of the tranny accidentally jumping into reverse and destroying the gears inside????

oh another Q, is it a 2 speed? meaning 2 forward speeds? or one forward and one reverse?? hope the Qs weren't too silly....

TIA.

JThiessen · 11.06.2006, 11:35 PM

POS - Piece of $*^# (crap)

I shouldnt blame it on the opti drive. I was a nitro newbie, and couldnt get my motor tuned right before I got the forward only.

Quote:

the entire tranny includes? the spur/slipper gear and the brakes?

In my case, yes.

Quote:

the optidrive is the sensor in the tranny? or is it the special revo receiver? (or will it work with any regular receiver?)

The optidrive is a sensor that attaches to the tranny, and there is a module that is intrageted with the shift servo, and reciever.

Quote:

the "forward only" is a hopup? is it made by traxxas too?

Yes - its a Traxxas sold product, it eliminates the reverse gears inside the transmission, reducing rotational mass, and with it, you could change the ratio in the tranny.

The tranny is an auto shifting two speed. I beleive you can run it without the optidrive system by locking the fwd/revse servo.

I prefer to have reverse also, since my driving skills arent as good as most.

BrianG · 11.06.2006, 11:45 PM

To add to JThiessen's post: You don't need the Optidrive for reverse. It just makes sure that the truck is stopped before it will allow you to shift into reverse. If you take it out, just make sure you don't shift into reverse while moving, either purposely or accidentally.

If you don't need two speeds (which most BL systems don't need), you can lock the tranny in second gear. This will give you reverse and motor brake. This eliminates the brake servo and associated parts, which reduces weight.

TBH: The stock reverse mechanism is very weak. Many people have stripped it, even when using relatively low-torque Nitro.

JThiessen · 11.07.2006, 12:01 AM

I agree with you Brian, but it sounds like he is using it as a nitro tranny, not brushless.

Quote:

i want to nitro-rize an ep truck.???? why? haha dun ask....hahahaha

BrianG · 11.07.2006, 12:11 AM

Oh. Well I guess you don't need to lock the tranny then.

overtki11 · 11.07.2006, 02:00 AM

thanks for all the replies guys!

real big help!!!

anywez JT, please pm me your prices for

1.the revo tranny without the opticdrive

2. the revo tranny with the forward only, without the opticdrive.

i'm over in singapore.

i hope i have enuf paypal money.....you do accept paypal?

hope to hear from you soon.

overtki11 · 11.23.2006, 08:24 PM

hey guys, got a few more Qs for you(may sound silly)..hope you can help.

when the shifting shaft is pushed into the tranny, is that "forward" or "reverse"? need to confirm this before i start fabricating the tranny mount, (might be fabbed the wrong way round without knowing it and have my project run backwards :005: )

thanks for the help guys!