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Mark Kovalsky Mark Kovalsky is offline

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Showing Visitor Messages 1 to 10 of 483
  1. mon_madarang
    Yesterday 06:02 PM - permalink
    sir will dexron III cause damage in my transmission? what could cause bad seal in my reverse clutch? can a good mechanic replace that bad seal? thank you very much sir. i really appreciate it.
  2. mon_madarang
    07-01-2015 09:16 PM - permalink
    sir, i would like to ask whats going to happen if you put dextron III instead of mercon v in ford explorer sport truck transmission? and what could be the problem if the reverse gear wont respond immediately? mine wont engage immediately, it will take 8-10 secs before it goes on reverse and sometimes i even have to turn the engine off and on before the reverse engages. sometimes also when running for a period of time the o/d off flashes in the dash. butif i turn off the engine and restart it goes out. what do you think could the problem be? i had the atf changed but they put dextron III. please help! thank you..
  3. galaxiegt
    06-26-2015 05:53 PM - permalink
    I thought I had seen you post that once before on this forum perhaps. Yeah in normal Drive position (overdrive on), it acts like it engages, will pull slightly on flat ground, but manually shifts normally through all gears. I'm guessing the overdrive one way clutch means she'll have to be pulled out and torn down to fix. Really considering a c6 swap since I don't do a lot of interstate driving with this truck. Thank you so much for the words of wisdom.
  4. galaxiegt
    06-26-2015 10:52 AM - permalink
    Hi Mark. I had a fellow mechanic tell me that you are the man when it comes to E4OD problems. I have a 93 Bronco. Last week one of the trans lines leaked a bit at the cooler. When I pulled off the interstate the truck would not pull in Drive. I immediately manually downshifted to 1st and it engaged and pulled off, shifted to 2nd gear manually and pulled into a gas station. Let it sit and cool off. Added back the 2 quarts of fluid that it needed, but it still wont pull in D. If you manually shift to 1st or 2nd it engages and pulls off fine, and if you skip shift to Drive it will shift perfectly all the way to OD. It will also downshift if you kick down on it. If you roll stop or turn in somewhere it pulls great in Drive. IF you completely stop it will not pull in Drive unless you manually downshift, then its fine. It acts like it is stuck in 3rd gear when you completely stop. I pulled codes, there are none. No CEL. NO blinking O/D light either. What are your thoughts?
  5. JoeUPS
    06-22-2015 05:13 PM - permalink
    OK. Thanks. I appreciate your taking the time to answer.
  6. JoeUPS
    06-22-2015 12:00 AM - permalink
    Hi Mark: I'd appreciate your help. My 1999 F150 (with an automatic transmission) will only go into 1st and 2nd gear. As it shifts into 3rd it acts like it is in neutral. No reverse, either. If I move it back into neutral and then back to drive it will reengage if I my speed is below 30 miles per hour or so. This was my dad's truck so I know it was maintained well. I bought it after he passed away. It has around 103,000 miles on it and he had the transmission flushed and filled at about 80,000 miles.

    Or at least the paperwork says it was flushed and filled. I dropped the pan to see how things looked and the white stopper plug was in the bottom of the pan. Things didn't look bad. There wasn't much build up on the magnet and everything was clean. The fluid doesn't smell burnt and isn't too dark. I put a new filter on and refilled the six quarts or so that came out with the pan but there was no change.
    Is there a fix or will I need to have this transmission rebuilt?

  7. simba38863
    06-18-2015 01:54 PM - permalink
    Greetings Mark : Here are the stall test reading you advised me to take . In park at idle 65 psi / In drive at idle 70 psi /in drive stall 80psi @ 2200 / @ idle in rev 70psi /stall rev 5000 rpm 90-100 psi / Drive 1 idle 70psi stall @ 2300 @ 80 psi .Dr 2 idle 75 psi stall @ 2300 @ 80 psi . in reverse stall RPMs acts like a limiter is keeping RPM's from going over 5000 RPM's trans Temps never got over 165 deg F . What are your thoughts on the test ? Respectfully : Rick
  8. simba38863
    06-18-2015 05:27 AM - permalink
    Hi Mark . I have a 1999 F250 4R100 2wd . After rebuild at first as I was putting fluid in I had all gears w solid engagement . Before I got it full . I have lost reverse . Also All forward gear shifted fine but now 1-2 shift only shifts to second if i let off the gas . I have PO500 code and PO781 . Now only PO500 code w OD lite blinking .temp 165 deg F . pressure in all positions 65-70 at idle same in rev. Will stuck vales cause this or do I need to look for something else ? New filter and fluid . Fluid brite red ,no burned smell .Also at idle reverse pressure does not increase .All gear pressure stays same while fluxuating 3-5 psi when shifter is changed . Any help will be valued
  9. JoeJoe13
    06-10-2015 09:58 PM - permalink
    Do you think it may be the bipass and it needs a new one. I also question if it is the proper cooler. How can I test for an obstruction?
  10. Mark Kovalsky
    06-10-2015 07:13 PM - permalink
    Mark Kovalsky
    I think you have a restriction in the cooler lines. Blowing air through it and saying there is no restriction just says that the guy you had work on it has no idea what he's doing.

    You (or someone else) needs to find out where the cooler lines are damaged and blocking the flow to the coolers.

About Me

  • About Mark Kovalsky
    Former Ford automatic transmission engineer.
    SE Florida
    Flying, Antique cars and fire trucks.
    2 Letter State/Province (use "--" for outside USA/
    Econline or E-Series
    Current Mileage
    125,000 - 149,999
    Miles per year
    0 - 999
    2002 E350
    Engine type and displacement
    60 foot time
    1/8 Mile ET
    1/8 Mile MPH
    1/4 Mile ET
    1/4 Mile MPH
  • Signature
    Former Ford Automatic Transmission Engineer 1988 - 2007

    “The good thing about science is that it's true whether or not you believe in it.” ― Neil deGrasse Tyson


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General Information
  • Last Activity: Yesterday 09:59 PM
  • Join Date: 08-13-1999
  • Referrals: 1


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