How to Raise Chrysler RFE Transmission Line Pressure - No Tuning Required

[@wesleydeer889]

This is what an expert looks like

[@alyahyamo]

Ordered it from USA, received it a week ago, wonderful upgrade for my 65rfe, my transmission likes it. Shifts like dream, better perfomance in sand off roading. 2012 JGC, Saudi Arabia.

[@sonnax]

Excellent, thanks so much for the great feedback! Glad you're enjoying it.

[@wilsolo1986]

Thumbs up, Awesome! I received the booster kit today. Installed it on my 2012 Ram 1500. Did a hard reset by connecting both battery cables together for a minute or two. Have 50 miles on it right now, so far it's shifting great. I'm a happy customer, thanks.

[@sonnax]

Excellent! Glad to hear that, Wil. Thanks so much for the great feedback!

[@wilsolo1986]

@@sonnax Question, my co-worker asked me what's the difference with this kit or just riding with the tow/haul button on and I really couldn't answer him, could you help me give him a good answer? Thanks

[@sonnax]

@@wilsolo1986 Tow/haul mode changes shift patterns, and can sometimes block out the top gears. For instance, in a 6-speed it might keep you in gears 1-5. Our line booster does not alter shift points, but increases pressure for a more positive shift feel. Hope that helps, thanks!

[@wilsolo1986]

@@sonnax Awesome, thanks.

[@wilsolo1986]

@@sonnax Hi, do you sell a line booster kit for a 2007 Jeep wrangler?

[@danielholtzapple7124]

03 ram 1500 with 545 RFE here. Ordered your part. My problem is the tranny shifts into low gears too early and very soft shifts. Just had dodge reflash the trans computer. Do you think this will help my problems. I pull a trailer and zero turns every day and can't use this truck cause I believe it will damage the trans.

[@sonnax]

Hi Daniel, our product support team would be happy to help you. They can be reached directly via email at [e-mail], or phone at [phone] ext. 398. Thanks for reaching out!

[@nick.100]

I have super chip tune should I not use this ?

[@sonnax]

Hi Nick, our product support team would be happy to help you. They can be reached directly via email at [e-mail], or phone at [phone] ext. 398. Thanks for reaching out!

[@Iwillnotbepushed]

One of the issues I’m told with the 66RFE is low line pressure to 5th and 6th gears. Your kit should fix that issue if I understand what you just said. Excellent video by the way.

[@sonnax]

Thanks for the feedback! The RFE-LB1 will raise line pressure progressively from about 10 psi at lower pressure ranges to 25 psi increase at higher pressure ranges. This will provide improved clutch holding capacity in 5th and 6th gears. If you have any other questions, our product support team would be happy to help you. They can be reached directly via email at [e-mail], or phone at [phone] ext. 398. Thanks again, and have a great day!

[@Blessbethelord]

How do you do the number 2 modify the transmission tune? Is that something that you do?

[@sonnax]

Our product support team would be happy to answer your questions. They can be reached directly via email at [e-mail], or phone at [phone] ext. 398. Thanks for reaching out!

[@simonpickering3609]

Excellent ..A lot of folks are scared to touch an Auto box(except to remove and refit as in replace) anything other than that and maybe some adjustment to the linkage there is nothing that they feel they can do..IT isnt, when your car starts to mess about, such as; changing up too quick or missing out gears or not selecting, basically all things to do with gear changes and selection, one quick fix and worth a go if the trans looks awkward to remove or engine, is to go to the local breakers(scrap yard, car dismantlers or what ever you call them there) find your gearbox match(numbers, some can be cross referenced and in other cars) remove the gaerbox sump and remove the "valve body" (it must be kept very very very clean and the oil from the doner must NOT have a brown ish colour to it (plates are worn and that dirt will destroy your valves), it will be held in place by loads of bolts all easy to undo, just dont miss any and dont get the lenths wrong, refit to yours, add the right amount of oil, start on a 3 min tick over and then pull the lever through each gear in turn for 5 secs (twice on tickover) Then praise to whom ever you praise too. every time I have done this, it has worked .. don't pay more than $20 for the valve body clean any spare oil (change it immediately if it works & filter).. it's worth a go as we all know the alternative.. Si

[@DaveSimkus]

I have a general question about a valve body that I can't find an answer to. If you'd be so kind to give me advice I would be grateful. It's regarding a completely different automatic transmission, a SJ6A-EL from a 2017 Mazda MX-5. I saw a video of a mechanic adjusting the "pressure control valve" (boost valve?) without even taking the valve body out. He just used a flathead screwdriver to easily adjust this valve to a higher setting and claimed that this boosts the pressure a little and will improve shifting response. This was on an unmodified valve body with no "shift kit" installed. So My Question is: is it safe for me to adjust this valve to a higher setting or should I leave it alone? Would it really slightly improve shifting even without a full shift kit in the valve body? Keeping in mind that my car is stock, 80k miles and I don't abuse it. It shifts fine the way it is (a little too smooth for my taste) but if I could improve it a little without putting extra wear and tear on the transmission with this simple adjustment that would be great. Thank you for any suggestions on this.

[@sonnax]

Our product support team would be happy to help you. They can be reached directly via email at [e-mail], or phone at [phone] ext. 398. Thanks for reaching out!

[@dporrasxtremeLS3]

Great video information! I have a 2011 Chrysler Town & Country. with the 62TE trans. It just started slipping from 2nd, to third. I changed the filter and fluid. Cleared codes. Drove it around the block gently. It started slipping a little worse with a slight whine. I see a new check engine light. It read P0869. This motor/trans does not have a TCM, just a ECM. This code shows line pressure high. Low fluid, ECM, or wiring issues. Fluid is Ok, would changing the solenoid pack, and Tcc solenoid possibly help? The car has never had any trans issues, I have changed the fluid and filter every 60K. Any recommendations?

[@sonnax]

Our product support team would be happy to help you. They can be reached directly via email at [e-mail], or phone at [phone] ext. 398. Thanks for reaching out!

[@shawncybynog4768]

Does the Rfe's have an external line pressure test port for live fluid psi readings?

[@sonnax]

Yes, they do. There are several options available for adapters (here is a link to one Transtar sells: www.transtar1.com/products/transmission-tools-and-equipment/featured-products/Line-Pressure-Adapter-Tool). Just remove the line pressure sensor and install it in the adapter. Install the adapter in the case and reconnect line pressure sensor. Now you can verify actual line pressure and compare it to what the scan tool is reading.

[@CM-fv2js]

Could this possibly help with the dreaded 68rfe “transmission chirp”??

[@sonnax]

Not likely. Thanks for your question, and have a great day!

[@nikokorhonen5650]

Hello from Finland! Is this suitable for use with the Diablosport 8445-1 Intune I3? I use the 93 octane program in my Jeep WK Hemi.

[@sonnax]

Our product support team would be happy to help you. They can be reached directly via email at [e-mail], or phone at [phone] ext. 398. Thanks for reaching out!

[@rossokeefe9268]

So I got a superchips programmer..this will or won't improve shifts?..I beleive that the superchips already boosted the shifts.will this improve on that?

[@sonnax]

Our product support team would be happy to help you. They can be reached directly via email at [e-mail], or phone at [phone] ext. 398. Thanks for reaching out!

[@yasirqaed1473]

I have durango 2013 engine check is on i got the code P0935: Hydraulic Pressure Sensor Circuit High what shall i do to fix it?

[@sonnax]

Our product support team is available to help with any questions related to Sonnax products, but for general tech questions, we'd recommend contacting our friends at ATSG or ATRA for assistance. Hope that helps. Thank you, and good luck! • ATSG: www.atsg.us/ • ATRA: www.atra.com/

[@rustyjeep2469]

Is your line pressure booster compatible with the TransGo shift kit I’ve already installed in my 545rfe? The vehicle is a 2002 Jeep Grand Cherokee 4.7L (non high output) w/ full time 4wd.

[@sonnax]

Hello, It depends which TransGo kit you have. It should be okay with the early kit, but their newer tuneless kit is a different story and most likely not a recommended combination. Feel free to reach out to our tech team directly for more details, either via email at [e-mail], or phone at [phone] ext. 398. Thanks for reaching out!

[@UPRRTIMEMAN]

I’m interested I have a 2018 Ram 3500 with the 68RFE. How do I order

[@sonnax]

We sell all of our transmission parts through authorized Sonnax distributors. You can easily find the one nearest you right on our website: www.sonnax.com/distributors. Thanks for reaching out, and have a great day!

[@scatpack68]

I have a 2004 545rfe that shifts fine cold and while warming up. Once it reaches normal temp it will shift hard into 3rd, eventually triggering limp mode. The code reads insufficient governor pressure. Will this correct a weak hot pressure symptom?

[@sonnax]

Hello, our tech team would be happy to help you with any questions. They can be reached directly via email at [e-mail], or phone at [phone] ext. 398. Thanks for reaching out!

[@jmfz28]

Check your filters are tight and your oil level

[@scatpack68]

@@jmfz28 I ended up having to replace the entire trans with a remanufactured unit. Never did find out what caused the hot shifting issue with the old unit, but it drives like new again.

[@tmcorey1]

I have a 2004 dodge ram 1500 that if it sits unused for a few days, will be very slow to go into gear at start-up, but works perfectly thereafter. Any ideas? Do you have anything like this that would fix this? Thanks!

[@sonnax]

Hi, our tech team would be happy to help you. They can be reached directly via email at [e-mail], or phone at [phone] ext. 398. Thanks for reaching out!

[@quietsignal]

There is an upgraded oem line return filter (the spin on filter) that keeps the fluid from draining out of the torque converter.

[@tmcorey1]

@@quietsignal so that’s what’s going on? The fluid is slowly draining from the torque converter back into the pan while sitting unused? Thanks for the info.!

[@woodstovehooters4558]

My 545RFE won’t shift into higher gears (my max speed is like 25mph at ~3000rpm), even when I auto-stick shift to 3rd and the instrument cluster says it’s in 3rd, but really isn’t. Will this higher line pressure trick potentially get my Jeep to shift? Either way, cool idea and great video!

[@sonnax]

Our product support team would be happy to help you. They can be reached directly via email at [e-mail], or phone at [phone] ext. 398. Glad you enjoyed the video, and thanks for reaching out!

[@thomascarlton816]

Thank you for your time to explain

[@Tallokensol]

Hello, I'm getting P0869 High Prssure Transmission. I had Transmission Fluid flushed, filter replaced and Torque Transmission Selenoid replaced. But I'm still getting this code. Will this device help to fix the problem? Thank you.

[@sonnax]

Our tech team would be happy to help you. They can be reached directly via email at [e-mail], or phone at [phone] ext. 398. Thanks for reaching out!

[@irazu2008]

How does this affect warranty? If you uninstall and set it back to factory will dealer be able to tell?

[@sonnax]

This does not change the computer software or memory so you should be able to install and remove it on any vehicle without leaving any indicator that it had been there. Thanks for reaching out!

[@emadsalloum6230]

will this solve my problem? i have Chrysler 2010 300 c with error p1745

[@sonnax]

Our product support team would be happy to help you. They can be reached directly via email at [e-mail], or phone at [phone] ext. 398. Thanks for reaching out!

[@robertquinones943]

Hi there.! I've been working on a 2014 Ram with a Hemi - I know it will benefit from this as I've watched the line pressures && exactly as you've stated Actual && Desired line pressures vary at time && Low Pressure DTC has been set --- however the Engine Stalls without any other DTCs .... could Low Line Pressure cause the engine to stall .?

[@sonnax]

Hi Robert, our product support team would be happy to help you. They can be reached directly via email at [e-mail], or phone at [phone] ext. 398. Thanks for reaching out!

[@hairybass480]

This was my exact concern. Seeing as how its controlled by the tcm and talks to the pcm. It will snitch on you to the pcm and throw a code.

[@arevalocobra]

Is this why my truck starting stalling after ser v icing the transmission???!!!!

[@sonnax]

Our product support team would be happy to help you. They can be reached directly via email at [e-mail], or phone at [phone] ext. 398. Thanks for reaching out!

[@YourTransmissionRepair]

EXCELLENT explanation Thanks Greg!!

[@giovannimannino6217]

Where does this go on a 03 jeep liberty 3.7??

[@sonnax]

Hello, our tech team would be happy to help with any product questions. They can be reached directly via email at [e-mail], or phone at [phone] ext. 398. Thanks for reaching out!

[@jonnyboy3674]

I've been looking to try and get my transmision to shift a lot quicker on my 2010 ram; is this it?

[@sonnax]

Hi Jon, our tech team would be happy to help you. They can be reached directly via email at [e-mail], or phone at [phone] ext. 398. Thanks for reaching out!

[@gabrieltaylor1348]

Will this fix Low line pressure. I’m having hard shifts into 3rd

[@sonnax]

Hi Gabriel, our tech team would be happy to help you. They can be reached directly via email at [e-mail], or phone at [phone] ext. 398. Thanks for reaching out!

[@ronniearrington5584]

Will this work on the 2000 dodge ram 46re transmission

[@sonnax]

This kit fits Chrysler 65RFE, 66RFE, 45RFE, 545RFE and 68RFE applications. Thanks for reaching out!

[@shanejacob5442]

Would this operate on a 2011 Dodge Dakota with the 545rfe?

[@sonnax]

Hi Shane, yes it would! Thanks for reaching out, and have a great day!

[@j.m.967]

Will it work on jeep gc wj with RFE45?

[@sonnax]

Our tech team would be happy to help you with specific product questions. They can be reached directly via email at [e-mail], or phone at [phone] ext. 398. Thanks for reaching out, and have a great day!

[@ProMountainBiker]

Can this potentially harm an older high mileage transmission?

[@sonnax]

No, this will not harm a normal-working transmission with higher mileage. Thanks for reaching out!

[@country1072]

Will this help with a p0846 code on a 68rfe? I only have this code and limp mode when I hit the skinny pedal harder.

[@sonnax]

Our product support team would be happy to help you. They can be reached directly via email at [e-mail], or phone at [phone] ext. 398. Thanks for reaching out!

[@boogerhead0]

Sonnax, why am I not on your new product mailing list? Dang....

[@sonnax]

Feel free to sign up here so you don't miss anything in the future: www.sonnax.com/subscribe. Thanks for reaching out!

[@joshuamoore24_7]

What does RFE mean?

[@sonnax]

RFE is an automatic transmission family from Chrysler.

[@aaronolsen8787]

Rear wheel drive Fully Electronically controlled

[@bernhard8540]

This is similar to a "boost fooler" for the turbo, with no actual hard parts that are made for the tuned power. It simply tries to trick the system and from personal experience that is never a good thing because when the system thinks it's doing one thing and it's actually doing something else, that's when things get angry and hate life. If you electronically trick these trucks they hate life. If you want better line pressure spend this money on an actual kit for the valve body. It's not half as scary as it sounds to work on at all. And if your scared to work on your valve body or any part of the transmission just go to Amazon and grab the "ATSG 48re manual" book and it walks you through every single part and how it works and how you take it apart and put it together. A 5year old could rebuild a 47, or 48re with the "ATSG 47, 48RE TRANSMISSION MANUAL BOOK" firepunk also offers the atsg manual on their website and offers phone tech support from a real tech who works strictly on our dodge ram trucks and their transmissions. Not hating on this company at all but these trucks don't like tuning of any sort without hard parts to back up the tuning and your transmission will thank you later 😊

[@sonnax]

Thank you for participating in the discussion about raising pressure RFE’s and 68RFE. The RFE’s are a very different animal than the 48RE, and transmission line pressure control is achieved by completely different methods. Our experience has shown the best outcomes for vehicles is achieved without changing the OEM transmission tuning. Even the valve body kits that raise pressure do so by "tricking" the computer control. The Sonnax RFE-LB1 electronic booster kit is the original "tuneless" method for raising transmission line pressure in these sophisticated, closed-loop pressure control systems and works as intended.

[@rono3045]

Price? Part#

[@sonnax]

Hi Rono,the part page contains all part details which is linked in the video description: www.sonnax.com/parts/4360-line-pressure-booster-kit. Just click the 'Find a Distributor' button on that page to easily see which one is nearest you, and they'll be able to help you with pricing. Thanks for reaching out, and have a great day!

[@56832229james]

115.00$, you didn't mention the spring is made of gold

[@Another_Random_Dave]

I just bought mine for $55 on Amazon. It just came in today.

[@Pickleram]

2011 ram 5 speed with 152000 miles on trans,no problems but never have service trans. Normally I change my own filter and fluid on trans every 50-60 I but been so busy with work oops life happens. Would you recommend doing this or could I damage trans with not having serviced trans?

[@sonnax]

Hi David, our tech team would be happy to help you. They can be reached directly via email at [e-mail], or phone at [phone] ext. 398. Thanks for reaching out!

[@wolfmanking100]

? will the Transmission Chrysler 68RFE Internal Clutch Drum Print Share View Instructions 68RFE Smart-Tech® Overdrive Clutch Housing Kit Part No. 72960-16K work in a 66rfe and way dont people give the 66ref more love i have a 2016 power wagon with 37 inch tires on like to see some good upgrades for it thanks

[@sonnax]

No, however, we do offer quite a few parts for the 66RFE. Check out what's available here: www.sonnax.com/units/47-66rfe. And if you have any questions about which parts would be best for your build, our product support team would be happy to help. They can be reached directly via email at [e-mail], or phone at [phone] ext. 398. Thanks for reaching out, and have a great day!

[@Nioooke]

is it suitable for 2020 5th gen 2500 cummins ram?

[@sonnax]

Hi Pedro, our tech team would be happy to help you with any questions regarding this product. They can be reached directly via email at [e-mail], or phone at [phone] ext. 398. Thanks for reaching out!