justtmark

My Step Daughter just purchased a 1998 Honda Accord, 4 cyl with automatic transmission. It started slipping within days of purchase. The symptoms are all of the same ones listed in many post. Engages fine through all of the gears for short period (minutes) then it begins to slip through the entire range of gears, I have read about draining and refilling several time instead of flushing. Has anyone had any luck or even tried an in line filter to remove the grit in the fluid in addition to the drain and refill. thanks in advance for any help or input.

MAD_MIKE

The only way to change fluid in a Honda AT is to drain and refill.
If you can purchase Sea Foam Trans Tune locally do so. Drain the old fluid, add T-T then refill with ATF, allow to circulate, place in each gear to charge the circuits. Go for a drive and see if anything has improved, drain, refill, add TT, drive, drain, refill add T-T.
If there is quite a bit of slurry and junk coming out, there have been a few members who have used mineral spirits to help break down the crud inside the trans. I personally would rather find some T-T in bulk and fill the case with it instead.

The biggest problem with normally functioning Honda ATs is if the fluid is not regularly serviced, clutch material can build up in the sumps pickup and block it off. If this happens there is no real way to properly clean it without replacement. Being there is no pan, the filter is not readily serviceable. The main case has to be removed.

olddohc

iTrader: (116)

I have the same issue in my 99 f23 auto. I am on my second drain and refill. I also tried rhislone stop slip (half a bottle) and I took off the solenoids and cleaned both of those with brake parts cleaner. Although it has gotten better it still sucks. Coming to a light it shifts hard into first. When leaving a light it shifts harder than I would like and slips sometimes. I think the previous owner never changed the fluid. I am going to drain and refill 3-4 more times then get a new tranny if it doesnt work.

Ps with the next drain and refill Im going to use a full bottle of the rhislone and see what happens.

MAD_MIKE

Do not use 'stop leak' or 'anti slip' goos and fluids. Its a fluid it is not intelligent, if it can 'fix a leak' what else is it 'fixing'?

Drain the old fluid, refill the case with proper ATF and a cleaner, drive, drain, repeat.

You want to remove all the gunk and old used fluid. This will allow the transmission to work smoothly. If a leak occurs after the fact then that seal was already a leak, it was just plugged with goo/grime/varnish.

Amanda Romero

Hi so we have a 98 accord ex 2.3l and its an automatic. Drives but actsjumpy in each gear. Codes were p0700 and p0740 would anyone have a ideas

MAD_MIKE

P0700 Automatic Transmission Control System
P0740 Problem in Lock-up Control System

700 is a generic "There is an unknown problem with the transmission" code
740 is usually related to an overheated torque converter.

'98-'02 ATs are known for having transmission fluid flow issues through the cooler due to a faulty/jamming/overshooting PRV valve.
Sonnax has a fix. http://www.sonnax.com/system/pdfs/35...pdf?1320330979
But it requires removal of the transmission, and near complete dis-assembly. Best to just have the transmission rebuilt with the Sonnax valve and a new Honda TC.
Honda did extend the warranties on these transmissions, you may want to check with your dealer for any info. They may goodwill some of the replacement cost if you are out of warranty.

Amanda Romero

MAD MIKE
Thanks for your input, I think well just have it rebuilt then. .

MAD_MIKE

Make sure that the PRV is addressed. If a 'rebuilder' just slaps a new TC an clutch packs into the transmission it will just burn up again.

Verify that there is a flow problem, any transmission specialist will know about the issue, and should be able to tell you what the problem is.

olddohc

iTrader: (116)

Thanks captain obvious. Drained and filled mine 3 times with minimal improvement. On a transmission with 200,000 miles yeah its not going to solve or fix the transmission. Just like lucas for engine oil it stabilizes and allows for more lubrication which dramatically prolonges engine life and reduces friction. Realistically if its not the lock or shift solenoid the tranny is on its way our. If someone doesnt have the money in his/her current financial situation why not use the addititive to get the most out of the terminally ill tranny and allow for more time to save?

MAD_MIKE

Well well, if it isn't Sargeant Sarcasm. Haven't seen you in a while.
Depends on what is wrong with the transmission. If it has been neglected the sump pickup probably has a good coating of slurry on it.
As thick and goo-like that Lucas is, you may as well just put gear oil in your crankcase. Their display of four gears showing how viscous Lucas fluid is comical. Yeah, I really want my engine wasting an additional 10HP pushing this goo through the oil galleries. All the while the engine is spinning and not being lubricated as it attempts to force this gelatinous mess through the system. Nice.

Now maybe if it was used in an unpressurized gear system, like that of a rear differential, then I could see it aiding protection due to its viscosity. But when it comes to modern transmissions that need a lubricant/hydraulic solution with high fluidity, this is a bad idea.
Realistically, on Honda transmissions thanks to a lack of an easy way to replace the pickup screen. There is no easy way to service the sump. Only draining and refilling. And most folks don't do that. So what happens with Honda ATs is the sump becomes clogged with a slurry of metal and friction material. Two ways to clean it, remove the transmission, remove the case, pull off the sump pickup, replace, reinstall case and reinstall transmission.
Or use a cleaning solvent to break down the slurry, such as Sea Foams Trans Tune, which makes no claims to fixing seals or adding anything.
Because most if not all additives are garbage. They either do nothing, or exacerbate the problem.
And from Lucas mouth they admit to it being a goo.
If a seal is leaking there are roughly three reasons why a seal will leak,
Its defective, It's damaged, or there is unwanted pressure buildup.

Outside of an over pressure problem that has not blown the seal complelty, there is no fixing a seal leak. It simply wears.

Now if this Lucas treatment is so good at sealing up leaky seals, then what is it doing to the internals of the transmission? It's just gumming up the works, causing more problems and not solving anything.

olddohc

iTrader: (116)

Wow man I don't know if I can respond in 5 pages like you lol. Sargeant sarcasm? Lol where have we met before? Nonetheless I stand by what I said but you bring up some great points. You seem like a pretty smart guy.