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  1. Astro

    Welp I screwed something up.

    Hey guys, Tore into my rear yesterday to replace the axle seals, c clips, and cross pin. Took the cover off, rotated assembly to get to the bolt, removed bolt and pin, rotated again to get access to c clips, removed axles, replaced seals, reinserted axles, installed clips, had to rotate...
  2. Astro

    Best cold air intake?

    Hey all, What do you think the best cold air intake is for the 96 5.7L vortec? Was looking at the k&n, but the filter being exposed makes me wonder if it's not a good thing for mudding/offroading. I'm having trouble finding replacements for the stock tubing so I'm wondering if I should just...
  3. Astro

    LTFT under load.

    Hey all, Was wondering what y'all thought about my LTFT situation. Truck runs splendidly as far as I can tell, but here goes. At idle, everything is fine. All trims short and long are fluctuating in small amounts around zero. At medium acceleration, bank 1 LTFT goes up to about almost 18 and...
  4. Astro

    Front diff need modifier?

    Hey guys, gonna change the fluid in my front diff. 96 k1500. Does the front need the Ac Delco additive? Also, how much additive per quart? Thanks y'all!!!!
  5. Astro

    Fuel gage/interesting setup/need advice.

    Hey all, So some similar threads have been posted about this, but mine is a little more specific and I want to see if anyone out there has messed with this. I have a 1996. 1998 fuel pump/sending unit/tank. 2001 express van 0411 PCM. Stock setup with sending unit wired to gage didn't work...
  6. Astro

    Fuel gauge issue, but very specific situation!

    Hey all, So I upgraded my 96 with a 98 style fuel tank and pump to help prevent cavitation when going off-roading. Gauge was working just fine before I changed the tank and pump. On initial startup after the swap, the fuel gauge was definitely off. Showing half tank when there wasn't that much...
  7. Astro

    Weird rear end issue. Fluid e'rwhere!

    So, something weird going on at my rear end. I went under there to mess with my body mounts and discovered a bunch of fluid residue on the fuel tank, the rear pumpkin, the exhaust, the axle housings, and the bottom of the bed. Super confused. Touching the fluid, its kinda thick where it's not...
  8. Astro

    Fuel tank question.

    Hey all, was thinking of upgrading to the 98+ style fuel pump on my 96 because offroading and fuel cavitation is no bueno. Had a problem with that going down a bouncy steep decline over the weekend Has anyone done that here? Can I use my 96 fuel tank? What all would I need to change? I checked...
  9. Astro

    Need advice on rear end.

    Hey all, So I was doing the drums on my 96 k1500 today and noticed there's some axial play in the axles. I don't recall if there's supposed to be or not. It's a 14 bolt, btw. Measured with my caliper, the passenger side moves in and out about .035" which seemed excessive to me. The driver's...
    • Astro
    • Thread
    • axial play axles end play rear dif
    • Replies: 27
    • Forum: Axles + Brakes
  10. Astro

    Picture of 1996 4L80 inspection cover

    Hey all, Can someone take a few pictures of their 4l80 inspection covers? I want to order one from eBay but they have slight variations that make me a bit unsure. My tranny was a 96 model. Do the 80 ones have the two bars going from the engine to the cover like the 60's? Thanks everyone!
  11. Astro

    Lifters, maybe? ... Probably

    Hey guys, 96 L31 here. Super stoked about this, but I've got a consistent soft ticking sound coming from the passenger side. Seems pretty common. Started after I changed the head gaskets and has been going on since then. Damn it's almost been a year. Initially I chocked it up to exhaust leak...
  12. Astro

    4L80 swap tips and tricks.

    Hey all, about to complete (have competed!!!!!!!!!!!!!) my 80 swap into my 96 k1500, 5.7L, 0411 swapped truck. I wanted to cover some of the things I ran into while doing the swap and maybe shed some light on issues y'all might run into during this undertaking. Also, going to try and throw in...
  13. Astro

    A little help with pinning VSS.

    Hey all, Converting my 96 k1500 4L60e to a 96 4L80e. I have most of the pinouts figured out, but I have one question. I discovered that the VSS for the 4L60e is actually on the transfer case. This kinda threw a wrench into what I thought I had to do with the pinouts on the 0411. It thought it...
  14. Astro

    04 5.3 to 96 Sierra

    Hey all, I have a 96 k1500 with an 0411 swapped pcm. I have a buddy selling an 04 5.3 l with tranny and was thinking of making the swap. Has anyone done this and what's involved? Do I have to change a bunch of connectors out or are there sensor adapters? Do I have to add sensors? Thanks in...
  15. Astro

    4l80e swap thread... Again...

    Hello guys, Just blew up my 4l60 on my 96 k1500 and was thinking of swapping to the 4l80. I have a 411 pcm installed already. Repinned it myself. What all do I need to do to swap it? Do I need to change drive shaft lengths for front and back? I keep finding conflicting info so it's a little...
  16. Astro

    Hvac motor confusion

    Hey all. 96 Sierra here. So I'm experimenting with pushing a little more voltage to my blower motor, but I've been having some trouble with a seemingly simple task. Ok, so I've used voltage step up converters on model aircraft and they're pretty straight forward. The converter has a certain...
  17. Astro

    Sierra service manual.

    Does anyone here have the pdf version of the service manual for a 96 sierra? I looked at websites online, but they look really sketchy.
  18. Astro

    Overhead console wiring from astrovan.

    Hey all. I have an overhead console from an astrovan I'm modifying to fit my 96 extended cab sierra, but I'm a little confused about the trip computer/nav class 2 serial data wire. Where the heck do I tie that into? Also does anyone have any links to someone actually doing this? Thanks for any help.
  19. Astro

    The Nth Steering thread for 96 Z71's.

    Hey all, adding to the plethura of threads revolving around this. I just replaced the following on my 96 Sierra because they were shot: 1)Idler 2)all tie rods 3)upper control arms with BJs 4)steering box (refurbished...autozone...) 5)intermediate shaft in the engine compartment. I think I may...
  20. Astro

    Question about torquing the heads.

    Hey all, I have a question about my 96 sierra 5.7l vortec head job. I bought a brand new quinn torque wrench with a built in angle system to do the job. After you reach the angle you want, it tells you what torque you reached. I cleaned the threads before installation to ensure smooth...
  21. Astro

    Weird hydroboost issue.

    Hey all, So I have a really specific issue with my HB. Just to preface, my 96 sierra k1500 used to have a vacuum power assist. I purchased a HB from a junkyard out of an 03 Suburban, rebuilt it (orings and seals) and installed it onto my truck with all new lines. I went through the process of...
  22. Astro

    98 ecu in 96? Swap possible?

    Hey all, I have a 96 sierra l31. I want to do an EGR delete, but want to tune it out. I can'/t seem to find a tuner near me that does old trucks like ours. Is it possible to swap a 98 ECM into my 96 so that I can use HP tuners to tune it out? HP tuners doesn't work on 96 trucks. Sorry if this...
  23. Astro

    So, this happened. Thoughts?

    Hey all, I have a 96 Sierra k1500, 5.7. So I was sitting in my engine compartment cleaning the valley and heads for an intake manifold gasket job. This could only have happened in a movie, man. Behind me, on my bench, was a dirty blue shop paper towel that I'd already used and was partially...

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