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Mark Kovalsky has a superb reputationMark Kovalsky has a superb reputationMark Kovalsky has a superb reputationMark Kovalsky has a superb reputationMark Kovalsky has a superb reputationMark Kovalsky has a superb reputationMark Kovalsky has a superb reputationMark Kovalsky has a superb reputationMark Kovalsky has a superb reputationMark Kovalsky has a superb reputationMark Kovalsky has a superb reputation

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Showing Visitor Messages 1 to 10 of 455
  1. amdriven2liv
    02-21-2015 03:58 AM - permalink
    Thanks Mark. Appreciate the Reps. And, I appreciate all the help you give us on the forums.
  2. heaffie
    02-12-2015 08:23 PM - permalink
    I have a 2003 F250 4x4 crew cab FX4 with the 4r100 transmission. It stays cool when normal driving but I hooked a trailer to it the other day and it was an equipment hauler with nothing on it. The transmission was close to overheating so I pulled over and let it cool. It did blow some fluid out of it. The transmission seems to downshift and upshift constantly under the least bit of acceleration. The truck has around 207000 miles and Im unsure or when it was serviced. Fluid is a little dark. Transmission cooler and AC condenser are clean as can be. I have done a lot of reading on the forums but don't know where to start.
  3. bottrot
    01-30-2015 07:27 AM - permalink
    Hello, I have 2000 E250 van that I put a new transmission in about 4 years ago. Worked perfectly until recently it doesn't shift to the lower gears. So it wants to start out in like 3rd or 4th gear. So it barely makes it from a stand still position and then starts working pretty good after getting up to like 30 m.p.h. Going up a hill or small incline at a lower speed. Barely makes it. It has a U on what type of transmission it is . It is a triton V8 5.8 l thanks for any help you can be. I appreciate it
  4. DBowers54
    01-25-2015 10:24 AM - permalink
    my f150 4.2 liter truck idle s up very high and will not go back down. ive already changed the TPS and the IAC sensors and also cleaned the trottle body. what is wrong with this engine?
  5. DBowers54
    01-25-2015 10:17 AM - permalink
    where do i find the VSS sensor on my 1999 4.2 liter 4wd 5 speed OD f150 pick up? i went to auto zone and ask if their was a sensor on the manual and the automatic transmission and they said yes but did not have a diagram where it went. can you help me?
  6. 1stpowerstroke
    01-15-2015 04:19 PM - permalink
    Hey Mark, I hope you can help guide me in the right direction. I just bought a 2005 F250 6.0l. The previous owner had the transmission rebuilt May 2013 using a Billit River City Diesel torque converter, billit input shaft and Suncoast Iropac-3 rebuild kit with transgo shift kit. This was only about 6,000 miles ago according to him. He had it tuned really high and was towing with it a bit. After bringing it home, under fairly hard acceleration, I get a buck or jerk almost like it misses the gear and then catches. This will happen in the 1-2 shift 2-3 and I believe 3-5. Any help what to look for?
  7. hdel
    01-08-2015 06:45 AM - permalink
    Hey Mark thanks for responding. Sorry I meant transmission range sensor. I replaced the rear speed sensor and throttle position sensor because it threw a P2106 code. I found out that, that code was thrown because of the vehicle's mph gauge spiking. I forgot to mention that the mph gauge shoots up to around 80-90 mph when the truck neutrals out. I thought that the sensors had something to do with the problem. And as far as the code reader, the one that was used is the same a repair shop would use. The ones where you insert keys into reader depending on the vehicle.
  8. hdel
    01-07-2015 08:01 PM - permalink
    Hi Mark, I hope I'm not out of line contacting you directly. The problem started about 3 weeks ago when my son was at a red light and the truck (04 Explorer 4.0, 4x4, auto, 130,000 mi.) would not accelerate when the light changed. I replaced the rear speed sensor, and throttle position sensor. Following day he was on his way to work and the vehicle neutraled out going about 40 mph. Only way to get vehicle to move was in 4L. Unbolted shift motor, left electrical connection together. Drove truck for 45 mins with no issues, shut down and restarted. Big mistake... the truck would not engage in any gear but 3rd. Changed tranny fluid and filter. Also tried to replace TSS but was unable to remove nut that holds manual shift lever. Spent 5 hours on that nut....will not budge. Reconnected shift cable and shift motor. Truck will not engage in any gear including 4H and 4L. Buddy of mine scanned truck. Scanner read "Electric Clutch Relay Circuit not responding ". I'm LOST.. Can you pls help? hdel
  9. pie eater
    01-07-2015 01:14 PM - permalink
    pie eater
    hi mark . sorry to bother you, but i have a quick question. i have just bought a 2002 mazda b3000 (ford ranger) i have the dreaded p0720 code for output speed sensor circuit. the tranny will drive in 2nd manual, and is slipping in reverse, and thats all it has for action. the last owner said the speedo started reading 140 mph even though he wasnt doing that speed. the tranny 5r55e was rebuilt june last year(14) but the shop that did the rebuild will not honour the warranty because of change of ownership.
    have you ever seen the output circuit cause similar problems, or do you think im barking up the wrong tree. i am presuming that everything should be good in the tranny, and was wondering if this circuit failure would effect the shift solenoids ect. sorry for the long winded mail, but i would really value you opinion.thanks. all the best for 2015. steve.
  10. Mark Kovalsky
    01-06-2015 09:24 AM - permalink
    Mark Kovalsky
    You should look at gear ratio to see if the measured ratio in second gear is correct. That's my only suggestion right now.

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

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


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  • Last Activity: Today 09:56 PM
  • Join Date: 08-13-1999
  • Referrals: 1


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