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  1. 99 & up 7.3L Power Stroke Engine & Drivetrain
    SOS I have a late model 99 with a 4r100, I was driving to work one day and after leaving a stop sign truck had no second gear. From that point on the truck would wind out first gear to 25mph and smash itself into 3rd gear. Brought it to a trans shop as a bench job who said that second gear was...
  2. 99 & up 7.3L Power Stroke Engine & Drivetrain
    I have gutted my 4r100 and found that some splines were destroyed. So I replaced the part and put it back together following the transmission bench 4r100 class by Jim on YouTube. Everything went together good at least I thought it did. I hoist the transmission back on the engine and put the...
  3. 99 & up 7.3L Power Stroke Engine & Drivetrain
    Recently I’ve been having transmission problems on my early 1999 f250 SD so I got a donor truck to put the running transmission into mine. Same year same engine, everything matched up. I made a torque converter mistake when mounting it onto the engine and only realized I made the mistake when i...
  4. 99 & up 7.3L Power Stroke Engine & Drivetrain
    Hi I have a e99 f250 4x 7.3 ( no mods to my knowledge beyond a knn airbox setup.) I had bought last year and 3 months later the truck lost all push forward and reverse. It gave no warning just nothing. So I got another of the same truck down to the color even. Only difference would have been one...
  5. 99 & up 7.3L Power Stroke Engine & Drivetrain
    Looking for some help here gentleman. Hopefully Mark K or another trans Guru sees this. This truck (E99 F-250 supercab SB) has been mine for over a year now. Over that period, I’ve had close to 4 transmissions in it. The cases kept cracking, which was solved and due to the truck being lifted...
  6. 99 & up 7.3L Power Stroke Engine & Drivetrain
    I’ve just rebuilt my 4r100 with a transgo hd2 kit. Since then it shifts fine cold but when up to operating temp I slip badly trying to get into 3rd and or past 3rd, so far I’ve checked my pressures, all within spec, my valve body’s i took back out whent through them again seems fine, my reverse...
  7. 99 & up 7.3L Power Stroke Engine & Drivetrain
    Hoping to get some insight on what my issues might be. Bought a early 99 7.3 with trans issues. Vehicle will not upshift into 2nd gear electronically but does manually. Im not a trans tech but work on fords everyday so I checked codes and have 2nd gear incorrect ratio. Fluid is full and clean...
  8. 99 & up 7.3L Power Stroke Engine & Drivetrain
    I've got a 7.3 4R100 that will not engage first gear. Reverse engages fine, manual 2nd is fine, but manual 1 acts like second gear as well and drive starts with second. Main valve body has been changed along with a solenoid pack that we were kind of iffy on but stuck in there for shits and gigs...
  9. 99 & up 7.3L Power Stroke Engine & Drivetrain
    Hello! I'm new but have been reading the threads and Mark's help thanks in advance for reading! We bought out 2000 f350. Dropped in a new used motor as the old one was cracked. Ran good but hubby drove it before checking the tranny fluid which was about 5 litres low. Noticed transmission was...
  10. 99 & up 7.3L Power Stroke Engine & Drivetrain
    Hey guys. hoping for some help here. Purchased a '99 Lariat 7.3 supercab short bed for 2 grand. rust free for the most part... has new engine, trans, and frame. it was a once in a lifetime deal I couldn't pass up. I've owned 7.3s in the past and im quite familiar with them. this truck...
  11. 99 & up 7.3L Power Stroke Engine & Drivetrain
    I have 2000 cc dually 4x4 7.3l I do alot of towing and driving. I've driven around 300k in 2 yrs. Was wondering what I could do when I rebuild the trans to make it a little more reliable and up to hauling heavy trialers long distances thanks in advance BTW new here.
  12. 99 & up 7.3L Power Stroke Engine & Drivetrain
    Hello all. Hopefully this is not too lengthy of a post but I would rather give you more information than not enough. To start my truck is a 2000 F250 7.3L PSD CCSB with 3.73 gears. I've got 235K miles on it. I have been having issues with slippy/hard shifts ever since I had my transmission...
  13. 99 & up 7.3L Power Stroke Engine & Drivetrain
    I have a 2000 7.3 with the 4r100. It was rebuilt a year ago and I just serviced the transmission 300 miles ago. Last trip made was pulling a fifth wheel over the mountain and my tranmission temperature gauge maxed out at over 250 and stayed there for about 10 minutes then it took about 15 more...
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