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  1. ncnichol

    4l80 jumping back and forth 3/4

    ok so, sorry for having slow responses, first problem is waiting for good weather to test then life keeps getting in the way lol. ok, so here is where im at, 1st thing i did after your last post was cheak tps, it failed...here's what i did, tested tps with multimeter slowly increasing throttle...
  2. ncnichol

    4l80 jumping back and forth 3/4

    i will try that for sure, pretty simple right? although i have been underneath and cheaked for perfect shifter cable alignment. but i will try it
  3. ncnichol

    4l80 jumping back and forth 3/4

    i live on vancouver isl in bc..... guess where my tuner is from ? alberta lol
  4. ncnichol

    4l80 jumping back and forth 3/4

    oh yah one thing you can be sure of is good grounds. every single one was removed cleaned and reinstalled, then i even added some extra ones. im actually pretty good at electrical
  5. ncnichol

    4l80 jumping back and forth 3/4

    sorry for the delay, life has been interfering with my hot rod lol. so im going to try and load my log file, this is new to me..... you might see 5 copy's of it or none lol. it doesnt look like i had any success, click on attach files.... it goes to ,my logs and tunes but theres nothing there...
  6. ncnichol

    4l80 jumping back and forth 3/4

  7. ncnichol

    4l80 jumping back and forth 3/4

    i agree....live in canada, aside from not enough race tracks, tuners are another challenge. one good thing though, we dont have the E.P.A to deal with.... yet!!! there a bunch of bureaucratic *****, i feel for you guys. those guys are friggen trouble
  8. ncnichol

    4l80 jumping back and forth 3/4

    I do have a data log actually. When I get home tonight I will post it. Oh yes I have video on it the whole deal LOL so I have a tuner that is apparently pretty good he's got his own Shop with a dyno with the website it all good reviews used Him in in the past, several of us have and it's all...
  9. ncnichol

    4l80 jumping back and forth 3/4

    Yes it is a roots type
  10. ncnichol

    4l80 jumping back and forth 3/4

    Thanks very much next your help is well appreciated. 09 Your advice Is encouraging, I have a tuner that was telling me it's gotta be an internal leak or a Converter o-ring.... I really don't believe that's The case. As soon as the weather cooperates I'm gonna try what you suggesthanks very...
  11. ncnichol

    4l80 jumping back and forth 3/4

    So I have an 02 short box 1500 Chevy 2 wheel drive. It has a built 6 l in it with a fairly large blower cam. I recently upgraded to a 4L80E with a circle D 3200 stall converter. The plan was to put a Magnuson blower kit on it after the transmission upgrade which I did. Drove it for a month after...
  12. ncnichol

    gear shift position indicator problem

    So then the pcm has the info, im wondering how it gets from there to the dash. In the 98 truck the trans harness goes into the truck behind the glove box, in 2002, which is what we now have it goes to the pcm under the hood, my question would be how does the signal get from the 2002 pcm to the...
  13. ncnichol

    gear shift position indicator problem

    so ive swaped a 2002 4.8 ls eng and 4l60e into a 98 chev p/u. im using all the 2002 eng trans pcm and harness and uhfb. 98 p/u had a 4l60e before. swap went great but i dont have a working gear selector indicator in the instrument cluster any more. does anyone know where this signal comes from...
  14. ncnichol

    gear shift position indicator problem

    so ive swaped a 2002 4.8 ls eng and 4l60e into a 98 chev p/u. im using all the 2002 eng trans pcm and harness and uhfb. 98 p/u had a 4l60e before. swap went great but i dont have a working gear selector indicator in the instrument cluster any more. does anyone know where this signal comes from...
  15. ncnichol

    ls swap water temp & fuel guage problem

    So i just watched a video on utube. Great solution, you use a stock water temp sender from a 98 camaro with the LS1. Goes in the stock location on the drivers side head. This is a 3 wire sender. Just cut off the 2 wire plug and hook the 2 top wires, gray to gray, black to yellow. That takes care...
  16. ncnichol

    ls swap water temp & fuel guage problem

  17. ncnichol

    ls swap water temp & fuel guage problem

    so ive swaped a 2002 4.8 out of a p/u into a 98 p/u. i used all the 2002 pcm, harness & uhfb. started the truck today & all went well except the temp & fuel gauges dont work {kinda figured} i was going to put the 98 water sending unit in the pass side head and be simple but it doesnt come close...
  18. ncnichol

    GMT400 to LS Harness Questions

    Wow your definitely correct about the not so simple idea. Looking at your post is reminding me of all the fairly simple connections that can get confusing by just not putting plug #s, colors ect. There's alot of stuff not so obvious. For instance, on a 98 chev 1/2 ton 2wd, all, or at least most...
  19. ncnichol

    GMT400 to LS Harness Questions

    I get ya pull
  20. ncnichol

    GMT 400 Hydroboost swap

    Me too
  21. ncnichol

    GMT 400 Hydroboost swap

    You dont have to have a different pump. The proper pump has a bit bigger tank ( reservoir) and two return line connections but you don't HAVE to have that, you can just t into the existing return line. The reason for two return lines is because both the hydro boost & the steerimg box have one...
  22. ncnichol

    GMT 400 Hydroboost swap

    I did this swap on a 81 sq/b 3/4 ton 4x4. I used a hydo boost off similar yr 1ton. I kind of cheated by using my original m/c. O. D is a bit to big to fit into the hyd/b but very little grinding and it fit. Just bolted right on in place of the booster, no other mods. Works fantastic as i have...
  23. ncnichol

    axle difference in 1988-1998

    I was kinda thinking the same thing. I haven't acually measured yet but even if i have to move mounts it'll be worth it. Thx
  24. ncnichol

    axle difference in 1988-1998

    So I've got an 81 square body with the s/f 14 blt. I want to go with the bigger full floater and i happen to have a complete unit just sitting here but its out of a 2004 h/d 2500. Be nice to use because it also has disc brakes. Do you know what the difference is ? I also have a 89 2wd 1500...
  25. ncnichol

    GMT400 to LS Harness Questions

    well i to am swapping an ls into a gmt400, in my case its a 2002 4.8 into a 98 1500 that had a 4.3. I to im having trouble finding how to hook everything up to the firewall plug. your post gives the most cross reference info ive found. Only thing is mine is a 98 but sill i think your on the...

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