545RFE, Code P0740

[@billk5727]

Thanks Gary. It's nice that aftermarket companies make fixes for these types of problems. As you know sometimes at the dealer you have to buy an entire assembly just to get a small part. TakeCare, Bill

[@mehmety4954]

Thank you for this infomations and sharing your knowledge 👍

[@GaryFerraro]

Very Welcome.

[@Tri-County_Gun_Club]

Hi Gary, I noticed a similar question on a 08 Ram 2500. 68rfe 6.7 Cummins, this happened the last 2 times I made about a15 mi trip to the farm. Temp below 30 degrees, drove to the farm mostly in 5 gear to help warm up. Coming home an hour or so later put it in drive all the way home. About 5 miles toward home Ck engine light came on. Checked codes when I got home. P0700 & P0740. Cleared them the fist time. Happened again the other day, had the Snap On Versus with me, hooked it up, same codes again. Left it hooked up so I have some data pids ( not sure how to interpret them). I don’t notice missing shifts or anything abnormal, I was driving in a snow packed country rd. The only issue I had notice before was, if I didn’t let it warmup before I drove it it sometimes didn’t want to unlock for a stop sign at the end of the street. Had to bump into neutral or coast through the intersection. It was fine after a mile or so. Do you think it would have a 60% or greater chance that putting a Sonnax rebuilt valve body in it could fix it. Thanks

[@garymullins6939]

thanks Gary for another good tip

[@GaryFerraro]

Welcome, thanks for watching

[@workharddieproud]

I had a P0740 on my 2004 Durango 5.7, 545rfe, for well over a year. Replaced sensors, valve body and solenoid pack. Anyway, moisture / water was getting in my trans fluid through the old pan, 224,000 miles on it. Long story short, moisture/water caused my P0740. I fixed it by flushing and draining.

[@JimGLopez67]

Good job Gary.Keep up the Good Work.

[@GaryFerraro]

Thanks for watching James

[@WarzoneDads]

2005 5r55s and in a mountaineer. Watched all your videos I could.. no 2nd or OD. Rest of gears work fine. Checked servo closest to bell, bore guage pins very nice and rubber piston seal is nice also. Dropped the pan and pulled solenoid pack and checked every solenoid for function and ohms and they're good. Pulled entire valve body and completely disassembled, checked every part and reassembled. Gasket plate is good also. Able to see adjustment side of OD band and put pressure on it from both sides, it's not broke. Reassembled, still same p0775 code and no 2nd or OD. No shavings to speak of. Tranny makes or never made any suspicious noise, went out on the highway. I'm going bald and losing my hair on this one. Any insight from you would be amazing.

[@GaryFerraro]

are there any other codes like P0732 or P0735?

[@WarzoneDads]

no codes at all, I was wondering though about another video you did for a lady that drove 2 hours to have you repair her 5r55s. She had a small pile of shavings the size of a dime laying on the valve body gasket when you pulled it out. Aside from the common wear on the internal parts, what was the actual cause of the 2nd and 5th failure?

[@GaryFerraro]

@@WarzoneDads The problem was a broken band. Her car had a bad computer as well which jacked up line pressure, she had a Lincoln around 2002 and it's common for those computers to fail

[@mitchriter570]

No idea if you get to older video comments, 2010 Ram 2500 5.7, 545rfe. Have shudder when the trans goes into lockup, no other issues. TCC bore wear or maybe broken springs?

[@GaryFerraro]

You could try to do a trans service, change both filters, new fluid and add a shudder fix, see what you have. If the Tcc spring was broken car would stall out

[@mitchriter570]

@@GaryFerraro did OEM filters and fluid about 4k ago with no changes, maybe I’ll try a shudder fix and see if anything changes. Thank you.

[@oldschool9746]

Garry, I notice in several of your videos when you're tearing down you put some bolts in the basket to your front left and then some of them you turn to your left and put them behind you, just curious as to why?

[@GaryFerraro]

oldschool Those are pump bolts and sensor bolts. I do that so I could just grab them instead of looking through all the bolts to find them

[@oldschool9746]

thanks for the reply

[@drtpredatorcontrol]

Gary, I have some questions for you about my 545 RFE, is there a way to get in touch with you?

[@GaryFerraro]

e-mail is [e-mail] Where are you located?

[@robmartin217]

Gary, 2000 Dodge Grand Caravan Sport...3.3L...156K....when check engine light first came on(po700,po740)....shifting fine... Now no go in drive, reverse...would solenoid pack fix it?....your opinion?...thanks!..

[@elulysero8863]

So i have a p0740 on my 2008 545rfe ram The truck does not stall and shifts fine no jerks or anything. Just the torque converter is not locking up. Do you think it could be the solenoid pack ?

[@elulysero8863]

It reads, P0740 "torque converter clutch solenoid circuit/ open"

[@BigHRepair]

@@elulysero8863did you ever figure that out?

[@pamelaflynn8844]

Hey Gary I have a 2004 Jeep Grand Cherokee 4.7 and I am getting the P0740 code as well. All groups lead me to changing the Solenoid block should I get a valve unit complete or just the solenoid.

[@GaryFerraro]

The solenoids are only sold in a pack. This code sets when the converter can no longer fully lock-up. This could be the converter itself or possible problem in the pump. All the valves that work the Lock-up are in the pump. Solenoid pack may not fix this problem

[@pamelaflynn8844]

@@GaryFerraro Thanks for the advise. I was hoping that it may be the culprit. Any advise on how much that type of repair would cost to check

[@GaryFerraro]

@@pamelaflynn8844 With this code, the only fix may be an overhaul, most shops won't try to fix this issue because this code can be caused number of internal transmission problems

[@robmartin217]

2000 Dodge Grand Caravan.156K.3.3L....po 700,po 740...when church engine light first came on...shifting good...now no go in drive,reverse...fluid full,looks good....your opinion?....thanks!

[@GaryFerraro]

Does the car move cold and then it heats up and stops moving?

[@robmartin217]

@@GaryFerraro no move at all....thanks

[@GaryFerraro]

@@robmartin217 Possible blown converter. car holds in park? any noises?

[@robmartin217]

Holds in park and no noises.....

[@GaryFerraro]

@@robmartin217 ok, did this happen suddenly?

[@edgarza4649]

What are the symptoms of a bad torque converter limit valve spring on a 545rfe

[@GaryFerraro]

Car stalls out when drive or reverse is selected

[@edgarza4649]

@@GaryFerraro thank you .my transmission was rebuilt not to long ago but now its started to jerk rpms goes up and down and then it slips what could be the problem ?

[@GaryFerraro]

@@edgarza4649 First i would check fluid level. Can you tell me if any codes are present

[@edgarza4649]

@@GaryFerraro il get it check in the morning and let you know the codes .thanks for replying 🙏

[@jasonmathis4076]

@@edgarza4649 I have a question for you : I have a 2011 ram 2500 4×4 5.7 hemi SLT TRUCK WITH THE 545rfe Trans in it .. 2 codes keep popping up P0732 and P0735 .. Any information would be much appreciated.. Thank you .

[@jimmymata7260]

Hey Gary I have a 08 ram 1500 5.7 it won't move in any gear. I can feel it shift through gears but won't move. I've changed the solenoid pack and both filters but still nothing. There is no noise but when I try to put it back into park while running it grinds. Could it be the torque converter?

[@GaryFerraro]

make sure your transfer case is not in neutral, if that is ok, may have a bad diff

[@warrenmeades4255]

Hi Gary. I have a 2011 Mazda BT50 Automatic. How do I know what type of gearbox it has in? Thanks a lot! Great videos!

[@GaryFerraro]

where are you located?

[@oldschool9746]

Thanks, Gary

[@GaryFerraro]

Thanks for watching

[@aviator1683]

Good morning Gary I have a problem with 2005 Nissan Altima Transmission the car came in with no movement no reverse no forwards I opened it up and I found nothing wrong So I went ahead and install a used unit from Lkq and the car run good for a little bit but after the test drive I put it in left to check out for leaks and the car wouldn’t move forward and no reverse also it has no codes do you think these units have to be programmed or something like that?

[@GaryFerraro]

No shouldn't have to be programmed. Did you swap over anything from the old trans?

[@aviator1683]

No I did not

[@aviator1683]

Today after closing the shop I was gonna move the car and the car run good for a little bit after about 3 minutes the transmission wouldn’t engage again I’m thinking the filter is getting plugged

[@GaryFerraro]

@@aviator1683 Sounds like the filter is clogging up

[@lukestrasser]

Gary, is the updated white connector solenoid pack and cam plate available from any quality aftermarket sources, or is this dealership only? It's a shame that such an inexpensive spring resulted in such a costly repair! Your transmission repair and rebuild will very likely outlast the rest of the Grand Cherokee. Nice work as always Gary!

[@GaryFerraro]

Luke Strasser I buy all my parts from Transtar. They have the good stuff of course dealer is another option

[@lukestrasser]

@@GaryFerraro Thanks Gary, I know on some parts you prefer OE only, I wasn't sure if this was one of them. I appreciate the feedback.

[@JosePerez-fw1zj]

Thank You Garry

[@GaryFerraro]

Thanks for watching Jose

[@kentpayen8848]

Also would x5 3.0 vavle body work on a 4.4

[@GaryFerraro]

what trans are we speaking of. sometimes there are 2 different units because of the engine size

[@kentpayen8848]

I got 2000 BMW X5 4.4...would a 3.0 vavle body work...if not with the code po740 clutch lock up should I look into the vavle body for that issue

[@GaryFerraro]

Kent payen Not a common code for this trans but the converter itself may be at fault

[@kentpayen8848]

One last question not using the recommended zf tranny fluid and after market filter could that cause that issue...

[@GaryFerraro]

Yes it could. You can go with a premium synthetic fluid if you don't want to use the life guard, always go OE filter, never aftermarket

[@Wadejm533]

In English please what does this mean what is 0740 mean what's wrong with my dodge caravan?

[@GM-cq7ek]

Hi Garry I have a 2008 Dodge Ram 6.7 Cummins I have the same code my transmission runs good it just doesn’t get my 6th gear and it drops to 4th or stays on 5th people tell me I need a rebuild but idk at this point

[@GaryFerraro]

Is that the only code?

[@markfiorella7447]

i wish you lived close by

[@GaryFerraro]

Where are you?

[@markfiorella7447]

@@GaryFerraro buffalo new york

[@GaryFerraro]

Mark Fiorella I’m on Long Island. Actually had a guy drive from there with his BMW Rented a car to get home until his car was ready.

[@GaryFerraro]

Mark Fiorella What type of car do you have? When I was growing up my grandparents lived in Fredonia

[@markfiorella7447]

@@GaryFerraro a 2015 chevy equinox 2012 town and country i change my fluid every 45,000 miles i live in eden new york not far from frediona