Search results

  1. J

    Swapping front diff help

    I better finish what I started. Don’t use guesses kids. I know better… The noise was definitely the transfer case. It was covered in muck from leaking both at the seals and a hole from the famous pump inside rubbing. It ran low and while I havnt opened it up yet to see the sparkles inside I...
  2. J

    Thermal to electric front diff actuator wiring

    Researched this plenty this week and found this. Credit to Grube. Post is below in similar posts. https://www.gmt400.com/threads/97-yukon-4wd-actuator-upgrade.65737/unread “Removed thermal actuator, cleaned threads, installed new spacer plug. Applied threadseal to new actuator and wind...
  3. J

    Swapping front diff help

    I did that early on in this. It all seemed smooth as butter without a load. We weren’t exactly flooring it but I felt like we had made all the parts move sufficiently. I’ve almost considered hanging out the front and rear doors while someone drove and tried to listen with a hose or some...
  4. J

    Swapping front diff help

    Actuator swapped. Functions as should. Still horrible loud grinding noise above 25mph and when it first engages ( I never had my window down) it makes a squeaking suction noise like somebody loudly slurping a noodle. For about 2 seconds. What I’m trying to figure out is how to further...
  5. J

    Swapping front diff help

    That’s what I did. I put the donor replacement actuator into diff (original) before removing the original diff and drove it in 4. And it engaged into both 4 and 4lo fine. My battery was dead the next morning but I think that was a coincidence. Like dead dead. Warranty covered it. I hope I...
  6. J

    Swapping front diff help

    So I think I can use my new actuator from the dead diff with my current wiring and will need the spacer from the wiring kit to make this work. Anybody ever been able to substitute a common object or know where to source it alone?
  7. J

    Swapping front diff help

    So then maybe this better asks my question. How do I overcome the differences in wiring layout in the plug. First pic is of the new to me diff. The other pic with the glove is my Yukons harness. Do I need to swap the actuators to overcome these differences or rewire my harness?
  8. J

    Swapping front diff help

    98 Yukon 4x4 auto. Front diff grinds loudly in 4. Swapped fluid for fun, no change. Bought a front diff off marketplace. Told him the GT4 RPO code and that it’s 4x4 auto buttons. Got to looking at it (new to me diff) and it’s got two plugs. One to the actuator itself. And one to the...
  9. J

    Lets see them 8 lugs!! 2500-3500 Photo thread!

    Looks best from behind…
  10. J

    Extensive Tune Up Misfires

    Yes it seems to be. Towing my raft loaded should tell all soon tho.
  11. J

    Extensive Tune Up Misfires

    Update: Cleaned MAF Changed out offending #5 plug Checked Vacuum 17-18 hg Cleaned up the easy to reach grounds I could find. Used a can of starter fluid to check for vac leaks and found nothing. Well I just took it 30 miles on the highway and on various driving and hills I have no misses or...
  12. J

    Extensive Tune Up Misfires

    Thanks. I found them as well. I’ve got a lot of reading up to do. I’ll post here as the project progresses. MAF cleaning tonight as well as some more vacuum leak searching around the offending cylinder.
  13. J

    Extensive Tune Up Misfires

    Clearly I don’t man…. I came here to a group of like minded enthusiasts to ask questions and learn. I felt like up until now that I had been apologetic of my misspoke terminologies and had corrected them. I really did try to follow the most basic schematic of steps to fix what seemed to be a...
  14. J

    Extensive Tune Up Misfires

    I’ll give it a try. But why is it only #5??? The logic part of me is dying to understand this.
  15. J

    Extensive Tune Up Misfires

    It didn’t log the misses until I was coasting. Could that be my cheap iPhone app scanner delaying? I suppose. But it was when I let off the gas completely to slow back down to the speed limit. Floored on the ramp had zero misses and it revs up as normal over 2000rpm. I haven’t had the...
  16. J

    Extensive Tune Up Misfires

    Still missing on 5. It was after getting on it at 75 mph and letting off the gas abruptly.
  17. J

    Extensive Tune Up Misfires

    #5&1 both read 130 psi dry. Didn’t have much free time today. I’m pressed and got what I could done before work. I’ll do all of them later with all the plugs out. Just wanted to look for a completely dead cylinder. fuel filter changed again. Gauge still reads 51 at idle and koeo maybe a...
  18. J

    Extensive Tune Up Misfires

    Here’s a big clue. All 104 misses on 5 came in a rush. I’m pretty sure it was the on-ramp or a wot I did on the freeway. I’ll try again after work tonight and pay closer attention. But I’m pretty sure #5 is a big problem. I’ll swap in a new wire and perform a compression test ASAP
  19. J

    Extensive Tune Up Misfires

    Tbh I had dumbed it down too much.
  20. J

    Extensive Tune Up Misfires

    This whole list of repairs was done slowly over a couple months. The car was driven during it as well. Often I’d think I had it fixed and it would sneak back up the 4th time she went up that hill. It’s my girlfriends ride until yesterday. We bought a Subaru for highway travel.
  21. J

    Extensive Tune Up Misfires

    Who knows. It’s a 98 I bought used for 2000 bucks I know about the gasses. I was in fact wreckless herr and was trying out of desperation and stupidity. I didn’t realize it couldn’t burn tho? Again it’s a 98 Yukon with a ton of miles and holes in the body. The tank is just as likely to...
  22. J

    Extensive Tune Up Misfires

    It looks like it’s tight in there. The bracket that holds it is tightened down anyway.
  23. J

    Extensive Tune Up Misfires

    Distributor is snug and I used the older screws for the cap. Seems solid to me. I’ll peak at the crank sensor. It’s under the alternator and water pump correct?
  24. J

    Extensive Tune Up Misfires

    Also that wouldn’t relate to my low Fuel Pressure after the pump replacement. Though my gauges could be cheep and from harbor fright…
  25. J

    Extensive Tune Up Misfires

    Noted. Care to elaborate? Otherwise I’m off to search and google more about testing it. I know when replacing it you need to use thermal paste to install it like a PC component and that’s the extent of my knowledge of it.

Latest posts

Staff online

Members online

... and 11 more.
Total: 1,753 (members: 61, guests: 1,692)

Forum statistics

Threads
64,472
Messages
1,394,654
Members
51,751
Latest member
brushwolf

Share this page

Top