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auto transmission problem - 1985 mercury grand marquis 5 l v8
Hello all,
My Dads car (hes 80) is a 1985 mercury grand marquis with about 180,000 miles we think. The odometer reads 80,000 miles , and my car which is an 1989 buick has 150,000 miles shown. Its a v8 engine with automatic transmission. The transmission fluid seems clean and at the correct level. While driving about 10 miles to the supermarket the car didnt shift from first or second gear after he stopped for a traffic light. We drove slowly into town , and started back and after a few slow miles it finally shifted but seemed to shift up and down a few times. It was very erratic for the few miles of the trip left. We dont feel putting a lot of money into the car is worthwhile , it was mainly for trailer hauling and he doesnt do that much anymore . A used 4 cylinder would be more economical on gas . The question is , is a transmission flush ($100-200) likely to help the problem or is the transmission likely to need repair . We have a quote from the local Ford shop of $600 to diagnose the problem with $1200 - $2500 for repair or replacement . The transmission flush quote ranged from $80 to $200, the $200 included something to do with a filter . I suppose I am asking for an educated guess so any comments are welcome . regards |
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auto transmission problem - 1985 mercury grand marquis 5 l v8
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auto transmission problem - 1985 mercury grand marquis 5 l v8
On Nov 7, 7:49 pm, i'm > wrote:
> wrote: > > Hello all, > > > My Dads car (hes 80) is a 1985 mercury grand marquis with about > > 180,000 miles we think. The odometer reads 80,000 miles , and my car > > which is an 1989 buick has 150,000 miles shown. > > > Its a v8 engine with automatic transmission. The transmission fluid > > seems clean and at the correct level. > > > While driving about 10 miles to the supermarket the car didnt shift > > from first or second gear after he stopped for a traffic light. We > > drove slowly into town , and started back and after a few slow miles > > it finally shifted but seemed to shift up and down a few times. > > > It was very erratic for the few miles of the trip left. > > > We dont feel putting a lot of money into the car is worthwhile , it > > was mainly for trailer hauling and he doesnt do that much anymore . A > > used 4 cylinder would be more economical on gas . > > > The question is , is a transmission flush ($100-200) likely to help > > the problem or is the transmission likely to need repair . We have a > > quote from the local Ford shop of $600 to diagnose the problem with > > $1200 - $2500 for repair or replacement . The transmission flush > > quote ranged from $80 to $200, the $200 included something to do with > > a filter . > > > I suppose I am asking for an educated guess so any comments are > > welcome . > > > regards > > A lot of possibilities... The fluid can look clean on the > stick, but a different situation in the pan. Could be the > filter is getting clogged and the seals are brittle and > take a while to soften and do their job. Don't event think > about a flush, it can cause more problems. You might drop > the pan and install a clean filter, then refill with > Dexron-Mercon III and a can of trans -Medic to soften up the > seals. Only thing is, the trans-medic keeps working unless > you remove it. So, after a week or so, I'd drain the pan > again. Do that a couple times and it will probably be good > for a year or so. Hopefully, you can do the stuff yourself. > Otherwise, you're at the mercy of the station-bots...- Hide quoted text - > > - Show quoted text - If this is a 5.8L(351 W) it has a VV carb with an AOD tranny. One thing to check is the TV cable. It is a cable that connects to the throttle mechanism and runs down to the tranny. This cable signals throttle position to the tranny. If it is sticking it can cause erratic shifting. As for the flush, I had a 85 Bronco with an AOD. It had about 190,000 miles on it and started shifting erratically. I did a flush and it worked wonders. Got me another 30,000 at which time I sold it. |
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