545RFE, P0750 With TCM

[@forsecurity1privacy]

Gary... YOU, you are the man! BTW my a604 is still running great three years later, thanks again! FabricGATOR (from MHS)

[@atefcables4607]

Have also problem from 3rd to 4th gear not engaged till i leave my foot from accelerator pedal did you think solenoid pack or worm valve body check ball

[@GaryFerraro]

has it been scanned for codes?

[@atefcables4607]

Yes transmission gear ratio 4th gear only open up transmission nothing in clutch i’m confused with valve body or solenoid pack do that problem do you have idea how to know where are problem from solenoid pack or valve body

[@GaryFerraro]

what happens on the 3-4 shift@@atefcables4607

[@atefcables4607]

Rpm goes up not shifting to 4th gear till i leave my foot from accelerator pedal

[@GaryFerraro]

sounds like a problem with the o/d clutch or maybe the piston that applies the clutch@@atefcables4607

[@claytonhonsey6166]

What if I changed the pack and silinoids, but the p0750 is still there? It drives fine?

[@GaryFerraro]

could be connection, wire or computer

[@KR-my7jl]

Thanks just figured out my solenoid is ok. This guy is awesome

[@GaryFerraro]

thank you, glad you got it fixed

[@atefcables4607]

Can you tell what i have to do when changing from black solenoid pack socket to white one

[@CubasAutomotive]

This was cool... a little different than the norm for you. I liked this electrical end part of the diagnostic process. So straight forward. **For anyone watching, Gary just lightly touches the front terminals. The test leads are small & easily fit in his case. *You want to be sure you're not causing new issues by expanding the terminals & making loose connections.*

[@victorramirez6975]

What's pin 18 that one reads 4.0

[@Cputer]

Good question!

[@AC-ei2cz]

Hi Gary. Thanks for this video. I have P0755 code and checked Ohms and all 4 values are between 1.4 and 1.6 Ohm . Any ideas what to do next?

[@GaryFerraro]

does the code set right away? Once cleared,comes right back?

[@AC-ei2cz]

​@@GaryFerraroYes, the code comes right back. The car drives only on 3rd gear in automatic mode. In manual mode it is possible to shift only on 2nd gear.

[@GaryFerraro]

@@AC-ei2cz If code comes right back, next thing to do is swap wires in the wiring harness at the pcm with another solenoid, If the code stays the same you have a computer problem if code changes you have a bad solenoid pack. I did a video on this, the code i had was P0750.

[@AC-ei2cz]

​@@GaryFerraroThanks!

[@venticore]

I am having a P0846 on a durango with the 5.7 hemi Replaced the solenoid pack and the error returned after few miles of driving and limped back.

[@GaryFerraro]

Do you have a scanner that shows live data? The code means the pressure switch is opening or closing at the wrong time

[@venticore]

Yes I do have a cheap scanner but capable of showing live data and the code is a hard code and wont go out even after clearing it.

[@GaryFerraro]

then i would say you have a wire or computer problem, Look at live data for the switch and see if it's changing state@@venticore

[@venticore]

update I checked the live data and found the 2c switch open in P\N and closed for the rest of gears and have no idea what that indicates for.@@GaryFerraro

[@GaryFerraro]

Let me see if i can find a chart@@venticore

[@bubba.watercraftj7269]

Will snap on Solus edge perform a “quick learn”?

[@GaryFerraro]

yes

[@charliehaines3615]

Thanks for the great video, I have a 2004 Jeep Grand Cherokee; 4.7 & 545RFE, Started by losing 4th gear and within a few moments (all gears but 1 & 2) threw a code for improper gear ratio and spun out. If I rebuild this myself, any words of wisdom specific to this trans? I see you recommend Transtech rebuild kits?

[@GaryFerraro]

I have a teardown video on this, have to watch the clutches in the input drum, I believe the overdrive set may be different(thicker) if you can measure the thickness of the clutch disc's other wise clearance may be off, There is a company in Florida called ATSG they have a good manual on this unit. Also watch the large snap ring, the opening has to face the valvebody or the valvebody will not sit correctly

[@dcoonrod827]

I have a 04 grand Cherokee with the 545rfe, I have a code for p750 and p2706. Would this be the same process for diagnosis, or would I need to start somewhere else?

[@GaryFerraro]

If it has it's own TCM then yes, this is where to start

[@Allproflooringspecialists]

I have the same issue, pin 19,59,60 read 1.3 and pin 20 doesn’t change the meter it stays at OL?? Any ideas?

[@GaryFerraro]

what is the year make and model of your car?

[@Allproflooringspecialists]

@@GaryFerraro 2004 Jeep Grand Cherokee 4.7

[@Allproflooringspecialists]

Same as the video

[@GaryFerraro]

@@Allproflooringspecialists ok, do a end to end check of the wire, if good then solenoid pack is bad

[@Allproflooringspecialists]

@@GaryFerraro I did a continuity check from Tcm plug to solenoid pack plug and it’s good. Thanks for your help!

[@jerryporter3798]

No I don’t have a scan tool Herman says on his video that when he is done putting the input drum together he pulls up on the from with a screw driver pulls up on the under drive plate

[@GaryFerraro]

The settings are within the computer and would have to be reset with a scan tool or the trans may work the same way. Herman has a u-tube video?

[@BigHRepair]

Does 1.9-2.1 ohms seem high? Thanks

[@GaryFerraro]

no, that is within range, Will the code clear or does it come right back

[@BigHRepair]

@@GaryFerraro it comes back within a few minutes of starting it after clearing. The wiring itself looks good from what I can tell, have replugged both connectors to make sure it's got a good connector. Buzzing noise in park or neutral coming from trans. It feels like it's a limp mode almost. P0700 and p0750 are the codes.

[@GaryFerraro]

what year is the car? , does this have its own TCM or is there a PCM?@@BigHRepair

[@BigHRepair]

@@GaryFerraro it's an 06 ram, so it's got that smart computer crap where it's got 4 plugs into one computer. Does not have its own tcm

[@daneflynn5145]

Hey Gary did you disconnect the battery before testing

[@GaryFerraro]

I think i did on this one but do not remember

[@jerryporter3798]

I had the dishwasher set on dry so I panicked and sprayed them down with w d40 that is when the rosy smeared all over I guess I could wipe them down

[@GaryFerraro]

usually a special soap should be used or mineral spirits to clean them, you could also use brake cleaner

[@jerryporter3798]

Ok I will get some brake cleaner again think I two am looking forward to a 545rfe rebuild Herman does a good but he is to fast he is at American transmission but he does not reply to anyone so on a sat I do appreciate your time again think you

[@GaryFerraro]

Sure, any questions while your working on it, my e-mail is [e-mail] Thats the best way to contact me if you have any questions, Do you have a scan tool to do a quick learn when the job is done?