auto trans bypass filter

[Jim McCarty]

The idea of putting a bpass filter on an automatic transmission seems to make sense (at least in theory). Has anyone done this with success? What system was used and what were the problems encountered? With the cost of a good hiperformance trans close the cost of the cummins engine it just seems that the better filtration would prolong the life of the trans. The only concern I can forsee would be dropping trans. pressure unacceptably and how it would be plumbed into the system. Thanks in advance for any advice. Jim

 

[bmoeller]

www.wefilterit.com is one option out there. Just received mine today. Will be using it for the engine oil.

 

[Snow man]

This is just my theory on this. Ive thought about doing it ,but any system you install will drop main line pressure while running down the road very slightly,but a drop never the less,with the torque of the cummins,we need all the front pumps volume we can get,esp under 2000RPM. So i dont think it would be a good idea unless a restrictor was put in to make t filter extremely slow,and this would need to be tested on the truck to see how much line pressure loss you experienced. Alos hot pressure drop would be more than cold,so itd need to be hot while testing. Also it would need to be set up so it worked in forward gears only,not that this is a big deal,but to those who plow snow for 30 hrs straight,were going backwards as much as forward. I still would like to try one,but I dont know at this point if its even worth it. Amsoil ATF seems to keep the planetarys tight much longer,that with its temp protection is enough protection for most of us.

 

[Turbo Tim 1]

I think the ideal way to do a transmission would be a completely seperate system, a suction and a discharge right in the pan and a filter with it's own pumping system. It would add a little more capacity to your system and not affect the normal operating conditions.

 

[Snow man]

I dont think it would be worth all the trouble to build /pay for a stand alone system. the pump required would be $$,it woul draw a lot of amperage,since bypass filters filter extremely slow,the volume wouldnt need to be much,but pressured be low. If these trucks had an air compressor then i could see using a air/diaphram pump to pump it. IMO its just not worth the potential problems,and costs. although it would be very cool to have

 

[Ralph Wood]

Originally posted by Snow man

I dont think it would be worth all the trouble to build /pay for a stand alone system. the pump required would be $$,it woul draw a lot of amperage,since bypass filters filter extremely slow,the volume wouldnt need to be much,but pressured be low. If these trucks had an air compressor then i could see using a air/diaphram pump to pump it. IMO its just not worth the potential problems,and costs. although it would be very cool to have

They dont put good filters on automatic transmissions. They are even worse than the motor oil filters. Some of the after market ATF filters are not much better. If you are a mechanical type like I am it is easy. Get a Perma-Cool remote oil filter mount from www.jegs.com number 771-1211 Ford. Run the line thru it going to the oil cooler. Use a motor oil filter such as a Ford fl-1a. Then if you want to really get serious about submicronic filtration install a Ford sandwich adapter such as a 771-181. Run hoses to a Motor Guard M-30 ATF filter and change them about every 50,000 miles. You will have a non restrictive dual remote system. The external system will keep the internal filter clean. You will need to purchase ATF cooler hose to fit. Normally the fluid is heated up by the converter then goes to the cooler then to the lube system. Unless you plan on keeping the truck keeping the fluid cool and clean probably is not that important. It doesnt seem to matter which fluid you use. It is required by law to be compatable.



Ralph

 

[Snow man]

Im well aware that the filters arent that great,but they do the job just fine when serviced at regular intervals. With the pressures in the cooler lines,I dont know if id be willing to run a remote. If i ddi though its be a universal 3/4 " log splitter type filter,with reducers to 1/2 for the big lines on the CTD. I also ran braided line when i did my twins. ,I dont want any more rubber hose than it already has from the factory.

 

[John - K5AWO]

Originally posted by Snow man

I dont think it would be worth all the trouble to build /pay for a stand alone system. the pump required would be $$,it woul draw a lot of amperage,since bypass filters filter extremely slow,

This thread has rejuvenated my interest in this subject. I have always felt that the transmission fluid should be filtered to the micron level.



A small inline fuel pump purchased at the auto stores is typically in the $20 range. They only draw current (less than 7 amps) when the diaphram completely relaxes and the next stroke is initiated. With the discharge piped into a bypass filter unit, they would only stroke maybe 3 or 4 times a minute??



I talked with my son about this and we are both going to install one on our trucks. The fluid in mine is too dark for me to be happy. If sub micron filtration is good for Mr. Cummins health, it has to be good for the power transfer device.

 

[Josparkz]

I put a B&M filter base with spin on filter, in the return line. I believe this to be the way to do it to minimize restriction.

However, the particular unit, I used,(which supposedly was their largest) was 1/2" tubing size, not pipe size. Oh well.

I am going to try and install a bigger cooler in the place of the stock one. When I do this, I will(beforehand) go down to the local farm supply and get one with the right size ports.