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P0732 Gear 2 Incorrect Ratio??

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JKWags

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Discussion starter · #1 ·
Greetings!.... 1st time poster :) (hopefully i am in in correct Discussion area)

2013 JK Sport Unlimited (automatic transmission)

Been getting a hiccup in the transmission when hitting about 40MPH. Took to a friend who is a mechanic and he was able to tell me that there was a P0732 code (note: no check engine light is on). He's indicating that it looks like it would be some serious transmission work. Came on here to look for some advie and guidance. Suggestions on what I should do next? Take it to a dealership for a professional Jeep look into it?? any other ideas??
 
#3 ·
Have you changed axle gear ratios or changed tire size?

Possible causes for P0732-GEAR RATIO ERROR IN 2ND:

Pinion factor is not properly programmed
Low transmission fluid
Other transmission codes set
Internal transmission failure
 
#4 ·
Another thing you can look at is the live data on the scan tool. I would make sure that your input and output signals are not dropping out. Also make sure that the RPM PID is close to the TRANS INPUT PID. They will vary a bit because of torque converter slip, but shouldn't be way off. Watch the live data as you drive the Jeep and see if that tells you anything.
 
#5 ·
I’ve been having the same issue. I get the P0731 and P0732 codes in the enhanced DTC area. I suspect transmission replacement is in my future. The only indication has been delayed shifts and hard upshifts at odd times. This is at 32K miles!


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Discussion starter · #6 ·
Thanks for the feedback folks. I did change tires about a year ago... but similar in size to stock. Jeep is not lifted either.
Going to take to Jeep dealer tonight and leave it for them to analyze the situation.
I’ll keep you posted... thanks!
 
Discussion starter · #7 ·
ok... update, I took it to Jeep dealership yesterday and paid for the $140 for their "overall inspection".... I wanted their opinion as well on the P0732 transmission code as well as any other work the jeep might need. When all said and done they gave me an estimate of ~$8K!! (including new trans, brake work, oil changes, air filter change, etc...). Didn't surprise me too much, since to me it seems like a typical dealership response to pinpoint EVERYTHING that can use work.

What I am really concerned about is doing transmission work that may not be needed . I am not convinced that there is an "internal" transmission issue..... and I'm looking to see it there could be any other "cause" of the P0732 code that could potentially be the cuase. I'm not convinced since the check engine light has not come on.... the trans fluid does not smell bad... does not have any particles in it.... is not burnt looking or smelling (it may not be perfectly pinkish looking but it smells slightly like crayon and is slightly dirty looking). I would just hate to put the money into opening up the transmission only to find it looks perfectly "normal". This is a Mercedes transmission after all!

I did swap out my tires ~1 year ago for 285/70 R17 LT 121/118R (from stock wheels). Could this have anything to do with my issue? Could something just simply need to be re-calibrated? or, could a sensor be failing??
 
#8 ·
Describe the "hiccup" you mentioned in the first post.

Do you still have the same symptom?


Here is the first question asked in the troubleshooting guide: "Was the Pinion Factor properly programmed for the actual tire size and axle ratio of the vehicle?"


Have you checked the transmission fluid level with the transmission warmed up, engine idling in park or neutral?

Do you know if any other codes have been set?
 
#9 ·
You need to check live data for the trans speed sensors. I would be willing to bet that one sensor is either not working or dropping out. The computer uses the speed sensors to determine gear ratios. The main sensors that are used are the crank(rpm), input speed(after converter), and the output speed sensor. That is what I was trying to tell you before taking it to the stealership. On the NAG1 trans not sure what the 13 has, there is not an output speed sensor so the computer uses the wheel speed sensors to provide that data. I would imagine that if tire size was an issue it would throw a code for other gears as well, but I could be wrong. As far as making the adjustments for tire size that can be done with a number of tuners, and could have been done at the dealership while they were charging you.

I would bet that it is a sensor issue. I think you have a W5A580 transmission though, so hopefully someone will respond that has that service manual. I did a quick search online for parts and it looks like there is a module that contains the speed sensor. They may have said to replace the transmission because they don't repair them. That particular sensor module is located under the valve body so it would need to be removed to replace it. If you do not have a service manual see if you can find one to do some more research.
 
Discussion starter · #10 ·
Thanks for all your feedback guys. The hiccup I was mentioning is when I am in the ~40-50mph range. Rpm is ~2000 then skips up to about 2500 before settling back ~1500 or so. Doesn’t happen all the time but does seem to happen more when the car is hot.
I did check the trans fluid while running the car and although it is slightly brown is still has a pinkish tint and no bad odor. Looks clean to me.
 
#11 ·
I can tell you for sure the programmed tire size does ZIP to the W5. In how it shifts or handels the torque load algorithm. I have programmed my 35s to be 32 and 40s no change. No codes only a speedo that is way off. I have since went to 37s and did not even bother setting for 37s still set for 35s. and it simple to do. does nothing to how its shifts when it shifts. the trans must have seperate input out sensor related to rpm and pedal position.

Now mines a 2012 JKR made in 2011 and the W5 is an Import from germany stated right on the factory build sheet. latter jeep in housed these not sure when.

over the time of owning this jeep the auto has at times done some quirky stuff though very rare. Only coming out of 4low to high. The rubicon might be different programming than the rest do to that low 4:1 tcase?. But while in low the W5 will always start in 2nd in low. unless you use manual over ride and tape **** to 1st. that is a good thing. dont need that crawling gear unless you are. But sometimes maybe 1 or 2 times a year. i will shift to high for the easy trail higher speed section and in high it tries to start in 2nd. If you go with it you get all kind weird glitches. once you restart the jeep it fixes its self and finds first again. Funny when asked on trail rides and thats all my jeep is for. leading when stop and have to restart people ask on the CB. you ok break down? Me is say No my jeep forgot what gear its in......... has not done it a season now. god i hope i dont jinx this Shi.........
 
#12 ·
'incorrect ratio' could be any number of things including the solenoid valve pack, or slipping clutches

The exact cause is not so easy to identify. A sharp transmission tech may be of help, but sometimes a teardown is needed. The good news, though, is if it is done by a good shop, you should be set for a long, long, time
 
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Discussion starter · #14 · (Edited)
BTW- check engine light came on today... I pulled into auto zone and they read the code. Not transmission p0732 code like I was expecting... was a p0441 code. I bought the part thinking I could fix that as well. Guy tells me that it’s a vacuum leak that could also possibly be cause of transmission hiccups/slips.
 
Discussion starter · #15 ·
Had the part installed over the weekend to address the code. Also - had Lucas Transmission Fix added as well. This has really made a difference and the transmission feels great and is shifting very nicely. Hmmmmm... may not need that transmission guy after all (at least for now... fingers crossed)
Have you guys had good results with a bottle of Lucas Transmission Fix ??
 
#16 ·
JKWags said:
Had the part installed over the weekend to address the code. Also - had Lucas Transmission Fix added as well. This has really made a difference and the transmission feels great and is shifting very nicely. Hmmmmm... may not need that transmission guy after all (at least for now... fingers crossed)
Have you guys had good results with a bottle of Lucas Transmission Fix ??
Click to expand...
Let us know how the Lucas Transmission Fix works out for you in a few months.

This is from your Owner's Manual:
Special Additives
Automatic Transmission Fluid (ATF) is an engineered
product and its performance may be impaired by supplemental
additives. Therefore, do not add any fluid additives
to the transmission. The only exception to this
policy is the use of special dyes to aid in detecting fluid
leaks. In addition, avoid using transmission sealers as
they may adversely affect seals.
 
Discussion starter · #19 ·
Check engine light back on. Now reporting 2 codes (no transmission related codes).
- P0441 ("Evaporative Emission System Incorrect Purge Flow" - same as previous post, and AFTER I just replaced with part ESM1001 Duralast Leak Detection Pump.... and rest codes.
- p0456 ("Evaporative Emission System Leak Detected (Very Small Leak)"
 
#20 · (Edited)
JKWags said:
BTW- check engine light came on today... I pulled into auto zone and they read the code. Not transmission p0732 code like I was expecting... was a p0441 code. I bought the part thinking I could fix that as well. Guy tells me that it’s a vacuum leak that could also possibly be cause of transmission hiccups/slips.
Click to expand...
What did the problem end up being? I just limped my 18 JKU to the shop with the same P0732 code. It would act like it was in neutral anytime I stopped and no shifting sound or movement when I would move the shifter between gears but the indicator on the dashboard moved. Turning the key off and back on several times got it to shift into gear but the same thing happened when I stopped again. It came about this morning with no warning signs. Sounds more electronic than mechanical to me. I also noticed a pretty loud whine when all of this started.
 
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