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John Deere Tractors Discussion Forum
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Power Shift vs Syncro

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jelsas

08-26-2005 11:52:03




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On a 4020 which is better? Easier to maintain? Cheaper to repair/work on? General thoughts on the 2 transmissions. Thanks




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buickanddeere

08-26-2005 22:47:04




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 Re: Power Shift vs Syncro in reply to jelsas, 08-26-2005 11:52:03  
As long as the proper oil is used and it's kept clean. PS wins hands down.



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Paul Rentmeester

08-26-2005 16:15:59




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 Re: Power Shift vs Syncro in reply to jelsas, 08-26-2005 11:52:03  
I have collected several 2510's and 2520's. This spring I got a Power Shift 2510, the rest are all synshros. The comments below are all good. Given equal maintanence, each are excellent in my experience so far.

So.....it get's down to what you plan to use it for. I have been using my PS for PTO work this summer. It is absolutly fantastic on the mower conditoner and small baler. As conditions change or you get to a tight corner you can easily change gears on the go, no fuss, no muss. My neighbor is an IH guy but he has really come to like the PS 2510.

I considered putting a loader on the Power Shift but in the end decided not to because I wanted it for PTO work and the forward to reverse and back works really nice on the synchro, just a throw of the shift lever.

For plowing I plan to use a synchro. It is just a little more efficient. On the other hand the PS would be nice for changing transport speeds on the headlands.

PS's tend to cost a little more but, bottom line, if I had my choice of a 2520 scynchro or a 2520 PS and the price was not a lot different it would be no contest in favor of the PS for me. Again, this assumes both had been maintained properly, likely the most important consideration. Good Luck. Paul

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G/MAN

08-26-2005 13:42:36




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 Re: Power Shift vs Syncro in reply to jelsas, 08-26-2005 11:52:03  
They are both very good and reliable trannies. Maintenance is similar on both - two filters on the Power Shift - one for the trans and one for the hydraulic system. Only one filter on the Synchrorange, but both have sump screens. Keeping the transmission system pressure up to specs is important on a Power Shift. I've read the comments about a Power Shift "taking more power" time and again, and with no disrespect to Mike M, that's simply not the case. Yes, the Power Shift can tend to pull the engine down some during certain shifts, and this is more noticeable with cold, thick oil, but once the shift is fully made and the various clutch packs and brake packs are fully applied and released, the Power Shift takes little to no more power to turn than a Synchrorange, and that's a fact. Power Shift also gives you four reverses in a straight line, while shifing between the two reverses (three if it's older or has been modified) in a Synchro requires moving the shifter into a different gate. Properly maintained, a Power Shift will generally outlast a Synchro by a fair margin. There's no mechanical clutch to wear out and require adjustment, and there are no synchronizers to wear. The synchronizers WILL eventually wear out eventually, regardless of operation or maintenance, because they're simply a wear item. But, the same holds true for the disks and plates in a Power Shift. It really does come down to personal preference.

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Doug in IL

08-27-2005 05:30:55




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 Re: Power Shift vs Syncro in reply to G/MAN, 08-26-2005 13:42:36  
EVERY 10 and 20 series Power Shift tested at Nebraska had less power than their Syncro counterparts. This was true of Pto as well as drawbar horsepower. In the case of the 2520, the difference was a little over 8 percent. Maybe heavier transmission parts, taking more horsepower to spin? I don't know.



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Tx Jim

08-27-2005 10:57:11




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 Doug in IL(4010 powershift????????) in reply to Doug in IL, 08-27-2005 05:30:55  
Doug if you find a 10 series powershift will take a picture and post it on YT. I've never seen one.Thanks,Jim



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Doug in IL

08-28-2005 08:23:17




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 Re: Doug in IL(4010 powershift????????) in reply to Tx Jim, 08-27-2005 10:57:11  
I thought that might be questioned. 2510's had Power Shift as a option. Don't need to see a picture, I have one of the tractors in the machine shed.



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Doug in IL

08-28-2005 08:33:07




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 Re: Doug in IL(4010 powershift????????) in reply to Doug in IL, 08-28-2005 08:23:17  
Tx Jim, Sorry, I read your post wrong. YOU wanted to see the picture! No, there were no 4010 Powershifts. Only the 2510 had Powershift. And they were introduced during the 20 series era. In late 1965, as 1966 models.



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Mike M

08-26-2005 13:02:32




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 Re: Power Shift vs Syncro in reply to jelsas, 08-26-2005 11:52:03  
Both have proved to be very good. I think it is more personal preference. I like the syncro range better as the park holds better on hills and is easier to get out of park on hills.Syncro also robs less power real noticable on a cold day.



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Bob

08-26-2005 12:04:46




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 Re: Power Shift vs Syncro in reply to jelsas, 08-26-2005 11:52:03  
The PS is almost indestructable, difficult to abuse, and rarely gives trouble, but when it does, it's $$$$.

The syncro is very good, also. The shift forks and synchros wear, and sometimes need replacement, which is $$$$ too, nowadays.

With the PS, there is no foot clutch connected to the flywheel. Instead, the wet clutch packs in the PS act as the clutch. This is probably a plus, for loader work. (There is still a transmission clutch on the flywheel, but it is connected to a little hand lever, and used as a cold-start disconnect, only, so it rarely gives trouble.)

The PTO clutch on the PS is also a multiple-plate wet clutch, instead of the single-plate dry PTO clutch on the flywheel that is used in the synchro models. Probably longer-lasting, but more $$$$ to fix if, and when it goes.

Shucks, I don't know what help this post is. It raised more angles than it solved!

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