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Sams Shop Talk

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Prestige -Transmission oil/filter change



I recently had the transmission serviced on one of my two prestige tractors. I paid my son to do this in his shop as I was busy with other things and did not want to monkey with it. That tractor had 600 plus hours on it and was beginning to whine  alot at startup and was acting a bit sluggish compared to normal.  Other than that it was operating normally.  With the irregularities and hours on the machine I figured it was time to  service it and  perhaps a few others I have here in use. I am doing the second Prestige myself and sharing the experience here with you.

I chose to buy the Tuff Torq Brand oil.  The capacity listed for the Prestige transmission is listed at just under 2 jugs.


Once drained and refilled, I found that the reality is that I ended up using just under a jug in each tractor.  The difference is probably because the oil in the lines, hoses, cylinders and steering valve dont end up draining out of the system when you drain the transmission.

For Prestige (and Conquest) you will  need  one of the tuff torq cylinder type filters. that goes into the lower front of the transmission., and a o-ring for the cap that holds that filter in.  For the Prestige you will also need a spin on oil filter that goes  up under the seat deck at the back of the transmission.



So, heres where I started, the front of the transmission. First step was to blow and clean off all the debris under the tractor and on top of the transmission. Loose dirt is a killer if it gets into the transmission.


I started with removing the plugs on the bottom of the transmission letting the oil drain out into a pan. To the left of the plastic plug there is one plug...


To the back of the transmission there is a second drain plug..


Following that I removed the plastic plug at the front. Just use a ratchet with the square end of an extension.


There is a spring on the end of the filter, and you can grab that and pull it out. This one is pretty dirty.


Once out and oil wiped off the edges and surfaces, I re-installed the plugs at the bottom of the transmission. Then installed the new Tuff Torq cylinder filter


Pulled the old o-ring off the plastic cap , then installed the new o-ring...


Then screwed the plastic cap back in place. I di not get carried away with torqing it on either. Snugged it up enough to compress the o-ring.

Then  I turned to the spin on filter under the seat deck.


Pretty tight in there , but found a filter wrench like this useful.


With this wrecnh I can get ahold of the filter on a slight angle and squeeze into the filter enough to get it grip and to turn to break free. Then just spin off by hand. Prepare for some oil spillage as you have to tip the filter to get it out and around the hose in the picture.  Then just get the new Briggs numbered filter  out...


I filled it halfway up with new oil, lubed the rubber seal up with a bead of fresh oil, and screwed it in place. I have a yellow paint marker that I write the hours on the filter with so I know when it was changed last. As you can see in the picture of the old filter in position above.

Once that is all done , pop the plastic access cap off from in front of the tractor seat and you will find the expansion tank for the transmission there.


Pop off the little rubber cap and get a long funnel and begin filling the transmission with oil.  I filled the expansion tank about a third full several times, letting it slowly drain down into the transmission  between fills. Di this until no more was draining  out of the expansion tank into the transmission.  You can look from the side above the tire to see the oil level in the tank. Helps to wipe the tank clean so you can see better. Will need a good flashlight for this. 


Once it stops draing into the transmission, I started the tractor up and drove it around a bit, working the powers sterring back and forth, running it forward and revers, and working the hydraulic lift up and down. After that I filled the expansion tank to where there is about 1" of fluid in it  with the tractor off.


This tractor was having some stiff steering problems before the oil/filter change. Its working alot better now. That and the transmission is alot quieter and smoother in operation. Going to tackle the conquest next...



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I need to service my Conquest transaxle. Thanks Sam for the reminder.

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Paul M.Murphy


A lot of good info Chris. My health has not been so good as of late so I have to do some other jobs before I get at the 707. We  are starting to get some nice weather so I'm working on my garden box.We can't really plant too many vegetables until after the 14th of June.

Well take care of yourself.


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@SmilinSam & Others - Curiosity questions.

Is the "second" spin on filter a Simplicity add-on for the Prestige only?  Belt & Suspenders approach?  But not on the Conquest.  

Other manufactures just use the internal "Tuff Torque" filter?  

Does the Simplicity Operators Manual mention the internal filter and/or instruct to change both?  



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3 hours ago, PhanDad said:

@SmilinSam & Others - Curiosity questions.

Is the "second" spin on filter a Simplicity add-on for the Prestige only?  Belt & Suspenders approach?  But not on the Conquest.  

Other manufactures just use the internal "Tuff Torque" filter?  

Does the Simplicity Operators Manual mention the internal filter and/or instruct to change both?  



The Conquest and Prestige tractors use different transmissions. While both use the same internal filter , only the Prestuge transmission  has the "guts" to run the power steering and hydraulic lift. So , no, its technically not an "add on". I dont know what other tractors that use these transmission have for filter systems, but it would be interesting to know.

Yes, the owners manual covers both filters.

The above is for ConQuests and Prestiges up to when they went to the new style in 08, or 09, or something like that. I dont have any idea what systems are like on the newer styles. I think @Chris727 has one of those ???...

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Ive used the kohler 10w30 motor oil in my 2005 prestige transmisson since new, its worked well, I change my trans oil every couple seasons since I use my tractor all year around.

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