36 john deere A ..

mike in new mexico · Jan 23, 2019

Hello- I bought a 36 john Deere A Tractor from a friend and he is going to deliver it Saturday. what I wanted to know is that there's a rectangular box behind the fly wheel with a gear lever sticking out, What is this for ? this tractor belonged to my friends father and he couldn't remember. I will take pictures when I get it- it's an older restoration, Thanks -mike

BMAN · Jan 23, 2019

That box would be an overdrive to give you some high speed transmission gears

susandiane · Jan 23, 2019

I think that's a Behlan overdrive. My limited understanding is that it was an aftermarket add-on that would give a road gear to tractors that didn't have one. The lever should be mounted on the rear of the case/box and move right-left parallel to axle. Someone will surly chime in who knows that they're talking about . . .

Mike M · Jan 23, 2019

Overdrive unit as the others said. I have never ran a tractor with one though so I'm not 100% sure how you are to operate it ? The regular transmission may need to be in neutral and then shift that overdrive box into gear is my guess. Otherwise I'd think you will get into two gears at once.

mike in new mexico · Jan 23, 2019

Thanks to all who replied, I kind of thought it was a road gear device, I was on line trying to find a manual or operator book but no luck, Thanks again everybody -mike

tim s · Jan 23, 2019

I had one like that years ago, you leave the middle (long) stick in neutral and then shift the over drive lever,,after that you can use the right lever for high/low...mine went a little over 20mph.

Mark-Ia · Jan 23, 2019

That overdrive will make your A run about 20 mph.

old popper · Jan 23, 2019

That box and lever gives your 4 speed A a fifth and sixth gear. Make sure the transmission shift lever is in neutral, engage the lever on the overdrive. If your high/low lever is in the low side, you'll be in fifth. If it is in the high side, you'll be in sixth. I grew up on a '40 A that had the aftermarket road gears. Good luck with your "new" A.

mike in new mexico · Jan 23, 2019

Thanks for all the replies. Thought about taking it off but after some research, I think that is beyond my skill level. Not sure I would like a 20mph 1936 A. Which way do you move the lever for off while sitting in the seat? Left or right?

tim s · Jan 23, 2019

You can treat it like it wasn't there,,you will need original parts to take it off,,you can't just "take it off".

old popper · Jan 23, 2019

sitting on the seat, move the lever to your right (towards the tractor) to disengage the overdrive. If I were you I would play with it a little, you may like 5th. AKA overdrive with high/low in the low side.

mike in new mexico · Jan 23, 2019

That's what I'll do-play with it a little while, might be fun- thanks, mike

Mike M · Jan 24, 2019

Did you have to put gas pistons in to get enough power to go that fast ?

mike in new mexico · Jan 24, 2019

That's a good Question, Wouldn't gas pistons make it hard to hand start ?-mike

36 john deere A ..

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