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Auto trans suddenly quit shifting properly after two days sitting. fluid 1/2 pint low. topped off fluid and shifted normal for aprx. two miles then began to slip(freewheel)in high gear 50mph.drove home same distance,shifting manually, and worked fine.it is a 1978 broughm 403 cid purchased this spring in wa. st. with 52000 original miles from the first owner. i drove it home to s.c. trouble free and now have 63000 miles and no leaks.shift modulator? any ideas?
mike martin s.c. p.s. not very computer savvy.
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Check the Coolant (antifreeze) level. My 94 continental has a hard time shifting from 2nd to 3rd when the level is low. Also, this may indicate that the transmission fluid is too old to work properly. The transmission fluid is cooled at the bottom of the radiator, since cool fluid works better than hot fluid (especially when the trans fluid is old) that could make the transmission not shift properly. Keep the coolant level up until you can have the trans fluid checked.
Are you sure your fluid level is correct? When they don't shift until warmed up,that is usually dirt or low fluid.
I would get a coupla cans of SEA-FOAM trans. treatment,NOT the motor treatment. Follow directions and sit in the car shifting it thru all gears many times. Take it out on freeway and kick it down to make it shift down and let up suddenly to make it upshift. Do this several times.
If it starts working for you,do a filter/fluid change really soon. I have saved them this way,but it's about 50/50 that you'll need a PROPER rebuild or replacement.There is dirt in there somewhere or the pump is giving up on you. don-ohio
Sounds like it needs trans fluid & filter change. Your description is actually normal for cars when EXTREMELY cold but shifts happen within minutes not blocks/mile. I'd change trans fluid & filter, VW recs every 50k (you didn't mention mileage)
I had a similar problem with my ford 1/2 ton pulling a trailer on a grade against the wind on hot day. thought I completely fried the tranny. Let it cool off, continued the trip and drove the truck for years with no more problems. Can't explain how your dip stick was dry however. The dipstick should have been wet with foamed trans oil.
Park the vehicle on a level surface. Check the transmission fluid level according to the instructions in your owner's manual. Caution: Do not overfill. The low mark is normally just a pint or in some cases 1/2 pint and is not a quart. If the fluid is not low then seek professional help. Do not ignore this. At least have the fluid and filter changed.
the solenoids in the trans may be sticking,try adding 1 pint of dot 3 brake fluid to the transmission fluid and drive it for a while-give it a chance to work..the brake fluid acts like a cleaner and it makes worn seals and clutches swell a little.just drive it easy for about 20-30 miles,its only about $3.00 and it could save a $1,600.00 rebuild
I have a 1999 Ram B 1500 Van, auto transmission, 5.9 L engine.
Same problem, trans hesitates in 2-3 upshift, sometimes 1-2
to 2-3 upshift. Posts trouble code P1756 - Transmission Govenor pressure too low at below 15 to 20 Psi. Transmission pump shot or valve body leak stops trans from reaching proper pressure to shift, which is minimum 15 Psi.
Either trans is leaking in valve body, valve is stuck, shift solenoid on valve body is sticking, or pump is shot.
Dear sea_lion42, Friday 2-20-2009 11:22pm EST (USA)
Check your transmission fluid which is usually done with the engine warm and running!
If the tran fluid is low add some Lucas Trans Fluid from your local auto parts store!
The knock makes me believe your low on trans fluid!
Artie first check the fluid level with the trans warm Idleing in neutral if it is low top it up with only hyundai trans fluid if this also if the fluid has a strong aroma to it, the fluid should be replaced although this is a sign of a failure in the trans and will be getting close to the time where it needs to be replaced
Your transmission fluid contain water,thats why the colour of the fluid changed to pink.And of such the clutch is slipping causing the engine to reve up before shifting - Check transmission cooler.
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