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John Deere Tractors Discussion Forum
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3020 Synchro Range Reverse Strength

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kdagenais

10-17-2005 09:46:43




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Hello,
Just wondering if anyone can give me a ball park idea how strong the reverse gear is in a 3020 Synchro Range tranny is. Would you recommend any kind of pulling with it in reverse? I know these are not the strongest tranny John Deere ever made and just wanted to get an idea on some of the strength limits it has.




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G/MAN

10-17-2005 10:14:52




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 Re: 3020 Synchro Range Reverse Strength in reply to kdagenais, 10-17-2005 09:46:43  
Not the strongest tranny? Granted, they're not as capable of dealing with abuse as a Power Shift, but Synchro-Range trannies are plenty strong, and Quad-Range tranny is nothing more than a Synchro-Range with a two-speed in front of it. Exactly what sort of "pulling" are you going to be doing in reverse? I don't see any reason why the reverse gears wouldn't be every bit as strong as the forward gears, although the powertrain IS designed primarily for propelling the tractor forward.

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kdagenais

10-17-2005 12:25:24




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 Re: 3020 Synchro Range Reverse Strength in reply to G/MAN, 10-17-2005 10:14:52  
The tractor belongs to my friend and we have had issues with reverse twice now and involved rebuilding the trans shaft twice now. The second time I believe was from pulling it when it ran out of gas though. He was pulling trees down with a chain half way up but said didn't really take to much to pull them over. Said didn't yank them or anything they just came over very easy. I recommended that he doesn't continue to do this since we have allot of money into it and don't want to do rebuild it again. Just trying to see other peoples experiances.

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G/MAN

10-17-2005 13:36:44




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 Re: 3020 Synchro Range Reverse Strength in reply to kdagenais, 10-17-2005 12:25:24  
As Bob said, proper adjustment is pretty important on a synchro-range, just like on any synchromesh transmission. If the shifter/linkage/synchros are worn, you may not be full engaging the gears, which reduces the amount of torque they can handle.



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Bob

10-17-2005 12:34:23




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 Re: 3020 Synchro Range Reverse Strength in reply to kdagenais, 10-17-2005 12:25:24  
You can't blame the poor tranny, if the tractor was towed without the tranny in "tow".

Other problems MAY be the residual effects of that incident, depending upon what was replaced.

The shaft and reverse gear probably needed to be replaced, and perhaps the shift collar and the fork were worn, also.

Also, proper shift linkage adjustment is important!



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kdagenais

10-17-2005 17:26:49




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 Re: 3020 Synchro Range Reverse Strength in reply to Bob, 10-17-2005 12:34:23  
Bob,
You are right! I believe the towing is what tore up the reverse this second time but not sure. As far as the other stuff being wore out not likely since everything on the trans shaft was replaced including all the pinion gears on the first round (Very pricey too). This was done by John Deere dealer so I believe it should be done right. Just was trying to get a feel on how much the reverse can with stand in this tractor is all.

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720Deere

10-17-2005 18:27:50




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 Re: 3020 Synchro Range Reverse Strength in reply to kdagenais, 10-17-2005 17:26:49  
First off, just because a Deere dealer did the work doesn't mean it was perfect. Those guys put their pants on like the rest of us. You would hope that their mechanics would be the best on their own equipment, but it's not always so.

As far as how strong the tranny is in reverse, the tractor has far less traction in reverse and I can't imagine it would have enough to do damage. There is no way to hitch a load while pulling in reverse that will supply the same amount of traction that it could have going forwards.

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