"Whining Transmission", Limp Mode

**rw1112** · 07-11-2009, 04:11 AM

He guys Im new to forums, but Im having major transmission issues. I recently took it tithe dealership to have a leak fixed, and the yellow sensor plug replaced. And drove great. Then today I'm leaving a buddies house and it goes into limp mode. I turned it off, cycled the key, then took back off on my journey home. I got maybe 2 miles down the road and it does it again. Repeat the procedures, really paranoid, go to take off, and it hesitates to engage drive, and once it started rolling, there was a whining noise coming from what I assume would be the tranmission. And returns to limp mode, and now will not engage a gear. It threw several codes, P0700, P0730, P0731, P0732, and one ive never seen, P2784. Really worried about my car. Do you guys know anything about this? Thanks for the help. Ryan

**fnkychkn** · 07-11-2009, 04:41 AM

please update your vehicle profile in User CP. thanks.

P073x codes are gear ratio errors.

P2784-INPUT SPEED SENSOR 1/2 CORRELATION
Theory of Operation

The Input Speed Sensors 1 and 2 (N2 - N3) will report the same speed in 2nd, 3rd and 4th gears. If the Input Speed Sensor 1 and 2 signals are not the same in these gears, the DTC will set.

When Monitored:

Engine speed greater than 450 RPM, no engine speed DTCs, no TCM undervoltage system operation, no output speed sensor DTCs (CAN signal from the ABS system), all wheel speeds above 250 RPM (CAN signal from the ABS system), no rear wheel speed DTCs (signal from the ABS system), and no wheel slip detected (CAN signal from the ABS system), no shifting operation, Input Speed Sensor 2 (N3) greater than 800 RPM and Input Speed Sensor 1 (N2) greater than 0 RPM and the TCM not in reset.
Set Condition: If the speed difference between the Input Speed Sensors 1 and 2 (N2 - N3) is greater than 150 RPM.

Possible Causes
INTERNAL TRANSMISSION
TRANSMISSION CONTROL MODULE

sounds like a fluid level issue. best get it towed back to the dealership.

btw, welcome to LXforums.

**formerice** · 07-11-2009, 09:08 PM

Worst case senario, I'm sure yours is something minor, like low fluid, but at 150,000 miles, mine did something similar, I changed filter and fluid, but within 1,000 miles it acted up again. As soon it happened, I went on ebay and bought 1 for $500 , low miles out of an 07! So when it acted up the second time, I replaced it! 162,000 miles no problem. These transmissions are very reliable, as are the hemis, so one out of a wreck if you really do need one, should not be a lot of money. My mechanic charged only 2 hrs for the swap, btw. If the dealer says it's gonna be mega$$'s , you don't have to pay it.

**crossfire** · 07-13-2009, 06:29 AM

If I was you I would take it back to the dealership and have them take a look at it since it's been acting up after you got her. I might be something that they did and now your going through it due to someone not following the correct steps. Take it back and see what they say.

**dudeiwin86** · 07-14-2009, 10:49 AM

hope you didnt spin the tranny pump bearing onto the torque converter snout.

mikespy had a similar issue caused by something totally different, but it was transmission related he knew that much... a whining/bzzzing sound and thats what it turned out to be.

bring it back ot the dealer that serviced it, they need to take care of that

**rander** · 07-14-2009, 10:58 AM

They probably didn't properly verify how much tranny fluid you have. There is a procedure on how to properly do it. Also, make sure the 2 harnesses that go to your Transmission Control Module(TCM) are properly seated. I've had it go into limp mode by me not seating the harnesses probably into the TCM. By any chance, did you see a V101 code?

**rw1112** · 07-14-2009, 09:17 PM

Well, here is the update. According to the dealership, it's toast. They wouldn't go into detail about what exactly it was that went wrong, but I don't have a warranty, and they don't insure their work, so yeah. I'm gonna see if I can't get a second opinion. It's just a total hassle, getting a trailer, time off work, and so on and so forth. But thanks for the help everyone! And yes I'm working on updating all my info, just still learning the ropes! But if worse comes to worse, do you guys know any reputable transmission shops that could rebuild one around the DFW? Thanks so much!

**Mr. iNCREDIBLE** · 07-14-2009, 09:25 PM

don't know where you are located but:

http://cgi.ebay.com/ebaymotors/06-do...Q5fAccessories

**rw1112** · 07-15-2009, 10:12 AM

I live in Fort Worth, Texas.

**3Dave3** · 07-15-2009, 11:12 PM

My tranny went with only 2200 miles on the car, and it started with a whining sound and that was the pump giving out so they replaced the whole thing including the torque convertor. Sorry to hear you'll be out of pocket on this but maybe you can find a used one as I know to rebuild it would almost be as much as buying brand new.

Dave...

**linuxrc** · 07-30-2009, 01:23 PM

Originally Posted by dudeiwin86

hope you didnt spin the tranny pump bearing onto the torque converter snout.

mikespy had a similar issue caused by something totally different, but it was transmission related he knew that much... a whining/bzzzing sound and thats what it turned out to be.

bring it back ot the dealer that serviced it, they need to take care of that

where was the whining coming from? Did it sound like it was coming from the front/mid/ or rear? I have a little whine from a car I just purchased and I haven't really looked into it yet

**rw1112** · 08-06-2009, 11:02 PM

It was in the middle of the car. I trashed the factory torque converter, which then proceded to destroy the rest of the tranny. I recently took the transmission down and am getting ready to replace it, just waiting for a good used one to become available. But there was clutch material EVERYWHERE! And a destinct leak coming from around the bell housing. But I would take it to a dealer and get it looked at for sure!
-Ryan

**flpaul** · 01-05-2011, 07:55 PM

Originally Posted by fnkychkn

please update your vehicle profile in User CP. thanks.

P073x codes are gear ratio errors.

P2784-INPUT SPEED SENSOR 1/2 CORRELATION
Theory of Operation

The Input Speed Sensors 1 and 2 (N2 - N3) will report the same speed in 2nd, 3rd and 4th gears. If the Input Speed Sensor 1 and 2 signals are not the same in these gears, the DTC will set.

When Monitored:

Engine speed greater than 450 RPM, no engine speed DTCs, no TCM undervoltage system operation, no output speed sensor DTCs (CAN signal from the ABS system), all wheel speeds above 250 RPM (CAN signal from the ABS system), no rear wheel speed DTCs (signal from the ABS system), and no wheel slip detected (CAN signal from the ABS system), no shifting operation, Input Speed Sensor 2 (N3) greater than 800 RPM and Input Speed Sensor 1 (N2) greater than 0 RPM and the TCM not in reset.
Set Condition: If the speed difference between the Input Speed Sensors 1 and 2 (N2 - N3) is greater than 150 RPM.

Possible Causes
INTERNAL TRANSMISSION
TRANSMISSION CONTROL MODULE

sounds like a fluid level issue. best get it towed back to the dealership.

btw, welcome to LXforums.

where are the two sensors i am getting those codes