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  1. W

    fuel pump relay 98 5.7

    great info thanks
  2. W

    fuel pump relay 98 5.7

    Does the fuel pump always run off the relay or only while the 2 second system prime? My truck will run without the relay.
  3. W

    4l80e not shifting properly

    well truck was dropped off at a reputable shop getting transmission rebuilt done fight with it. Mike smith transmission danielson ct
  4. W

    4l80e not shifting properly

    well after getting a chance to really drive it today. is downshifting from 3-2 under hard load and not wanting to shift back up and not going into 4 until almost 70mph. and now here is the real bad it lost reverse while plowing my driveway. it will go in after 15-20 seconds so do you think its...
  5. W

    4l80e not shifting properly

    pretty sure your right that they are not the same i found 96 down 97 up on most sites what year was yours?
  6. W

    4l80e not shifting properly

    I bought a valve body for the 98 4l80e that was originally in the truck a before i put the 96 in would the valve bodys be the same? if so would it be worth installing the valve body?
  7. W

    4l80e not shifting properly

    it isnt any better and it shifts kind of hard i think i need to get a tank of fuel thru it to give things time to free up from sitting if it gets better i will get let you all know.
  8. W

    4l80e problems

    Sounds like your brake pedal interlock is fighting you
  9. W

    4l80e not shifting properly

    Will test it tomorrow and try and get back to you guys with the results
  10. W

    4l80e not shifting properly

    8 but it was about 2 quarts low once I checked it Tonite I know it was more than just the pan because a bunch came out when split from tcase and when I tilted down to unbolt from tcase
  11. W

    4l80e not shifting properly

    Not going back in to od after I get on it to force a downshift. But it may have been a fluid level issue as one of you guys suggested. I thought it was good but it was low. Was getting false reading on dipstick from adding fluid . So today I added about 2 quarts. I still need to test drive it...
  12. W

    4l80e not shifting properly

    how hard is it to change that harness?
  13. W

    4l80e not shifting properly

    noboth trucks had 4l80e i will assume that pcm isnt the problem the donor was a 96 into a 98 but everything was a direct fit just the cooler line came in and out in different spots
  14. W

    4l80e not shifting properly

    Ok i swapped 4l80e into my truck from a truck with a bad frame that sat for about 3 years and was fine prior to sitting. changed the filter and fluid dropping the pan not a complete flush and fill. when i get on it to downshift sometimes it doesnt want to shift back to OD. is there anything i...
  15. W

    split exhaust flanges

    Anyone have a part number for a split exhaust flange for a 98 k 2500 5.7 mine were both destroyed while removing y pipe for tranny swap. thanks wayne
  16. W

    transmission shudder 4l80e

    my trqnsmission shudders when shifting to 4 and i think sometimes when t/c locks. i have a know good valve body would it be a good thing to swap it out or would it be more likely something deeper than that and just needs a complete swap?
  17. W

    engine swap

    Is there a guide/ tutorial on here for engine replacement? when i did a a v6 with 5 speed had to move tranny back to get engine back in because i couldnt get engine into mounts with tranny in place any 2 cents would be great. this will be a 5.7 replaced by 5.7 auto tranny. and also will a 96...
  18. W

    transmission interchange

    awesome info thanks
  19. W

    transmission interchange

    yes both arev regular cab 4wd thanks the reason i was asking is because on the when looking it list 97-99 but this is good info
  20. W

    transmission interchange

    well i think the cooler lines would be an easy mod so other than that it should work?
  21. W

    transmission interchange

    i have 96 parts donor truck can i put its 4l80e into my 98 to replace its 4l80e? thanks wayne

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