Gitanjali

Acura TL 2001, 126K miles.
Noticed jerking while accelerating. Once at a cruising speed on highway then runs smooth. Once the car won't reversed for few seconds. Felt this jerking 4-5 times driving for about 3 hours. Had filled a Gas tank a day before. At the end of the trip as I was reaching home, had d5 blink, TCS and engine light came off. After turning off the car, only CEL is on. Got the codes, it is P1750(hydraulic pressure control malfunction) and P1676(A/T TCM malfunction)

Checked the Tranny fluid level, it is okay and color is normal. Topped off the Gas with 89 instead of 87, I have driven the car for few miles and did not get the jerk today. ECL is reset.

What do you think might be a problem? I hope my tranny is not going bad.

Skirmich

A clear indication that the trans is going bad is the dreaded P0740 code and the notorious Gear Slipping.

Your issues sound like bad pressure switches.

Gitanjali

Thanks for the quick reply. I have read few discussions saying P1750 could be tranny. I would be happy if it is not tranny. Could you please elaborate on which pressure switches? How about the TCM signal light malfunction? (P1676)

Gitanjali

I did more reading, did you mean to say, 3rd and 4th gear pressure switches? Are there only 2 pressure switches? while in there do you recommend AT filter change and flush the At fluid?

Skirmich

Sorry not the pressure switches, it seems to be an issue with the AB Solenoid.
I scanned the correct pages from the Service Manual for you:

Gitanjali

Skirmich,

You are the Man! Thank you.

May I know how did you reach to a conclusion that it is A/B solenoid and not ABC/TCS control unit and or wiring listed in page 2 and 3?

Just so you know, I was able to reset CEL and at present there is no error lights with few miles of city driving today. May return when I drive hard meaning step on gas.

Skirmich

They are both separate issues, I was only implying that the issue with P1750 was because of the AB Solenoid.
The other code has nothing to do with the first one, so they were supposedly 2 separate issues.

In any case glad they are gone, perhaps it was some electrical gremlin that went away with the ECU Reset... Keep fingers crossed!

Gitanjali

If I do have to go the transmission route, I have read some people recommending 06-07 accord V6 tranny instead of the same Acura type as it is prone to have more issues. Does this require any modification or they are identical? I don't believe Honda/Acura dealer would do this, so this will have to be done by the local mechanic.

Skirmich

Type-S requires no Mods to fit the AV6 its plug and play.
TL-p only requires to loop the PS Speed Sensor so it isn't that bad either.

Gitanjali

Took it to Acura Dealer said, need new tranny. I'm not sure if these people really troubleshoot the root cause. Quoted me $5600 +Tax with ECM if needed otherwise 1K less.
As I drive more, noticed sudden jerk (thud sound) is becoming less but now seeing noticeable gear shift problem and sluggish performance especially in 1st, 2nd and 3rd. Once it accelerates past 30 MPH then it seem to be fine. From standstill to till gains momentum, I can pretty much replicate sluggish acceleration and rough gear shift every time now. I hate to replace tranny if the problem is in one of the pressure switches and or solenoid.

musiclevelz5

The problem is rarely a pressure switch or solenoid. Your Transmission is dead and needs rebuilt or replaced with an AV6 immediately or you will be left stranded on the road somewhere if you keep driving it. This is an extremely common problem on these cars and will never be fixed unless an AV6 is installed.

Skirmich

^ Man don't sugar coat it like that....

Yikes

This man speaks the truth.

Gitanjali

I hadn't changed ATF in last 5 yrs and or 60K miles, so I just had dealer drain and fill ATF. Gear shifting has become smoother, at lower speeds you still feel rough transition, once past 30 mph then you don't notice the shifting. It struggles somewhat to get up to speed from standstill but once at speed then it seems to be normal. I haven't reset the CEL after ATF change, so I will reset that to see if it comes back. Do you think this may be a transmission fluid issue? I would go ahead with 2 more drain and fill
I asked dealer how did the fluid look like, he said it was dirty but there were no metals and it didn't have a burning smell. Is there a replaceable transmission fluid filter on this tranny or it is all internal. Is there a way to clean the filter?

MilwaukeeDave

iTrader: (3)

It's dead. You can delay it but won't matter cause it's dead.

Gitanjali

Car seems to returning to its normal performance level after ATF drain and fill yesterday. I have heard people talk about 3X3, I'm told the ATF is also acting as a detergent which cleans the internal components. Should I wait for a week before next drain and Fill so it savages as much gunk as it can? Also is there a ATF filter on this model? online search reveals no spare filter for this car that means it is internal??

MarcDavidoff

You are very likely just buying time with the fluid change. When the car is sluggish, are the rpms going up without really going anywhere? Then yes the trans is slipping. It's possible your engine could be causing your sluggishness but like others mentioned, you likely have a dying trans and the accord av6 is the way to go. You can throw some more money into a couple more fluid changes and see what happens but it is likely just a bandaid. I went thru the same with mine and was able to get some more time and miles out of it but eventually it just started slipping badly all of a sudden. Although I never had slipping if slow speed sluggishness- just shudders in D5 etc.
And yes there is an external filter near/under the battery

Shook187

Gitanjali you seem to be in denial...These cars have a long proven history of transmission failure with your exact symptoms.. I should know I brought one a month ago and it's having those same symptoms but I know what's in store for me.

To buy some time just drive it in D4 which is what I do, and it shifts smooth as butter.

Gitanjali

Today I noticed prominent downshift "thuds", when I let go Gas and car coasts, that's when I hear few thuds and it was pretty repetitive. I hear you guys on transmission problems with these cars. I just want to make sure there is not something else going on. A lot of people have talked about 2nd/3rd pressure switches. Also, does it seem like it could be an issue with the accelerator sensor?

sk6015

Were you able to fix the issue. If so how.

NSKHondAcura

I'm sorry, not familiar with the topic but I have a 99 3.2tl with the 4 speed tranny, i had it rebuilt but I do get jerking shifting from R to D, downshift sometimes jerks too, at cruise speed is as smooth as silk. My question is, is there a swap that require no mods or extra work? This B7va 4speed was rebuilt 2 times and now it working but not 100%