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    1991 V2500 4l80e 1st Gear Issue

    Well, got it all back together and it ended up blowing out on a trip from Orlando to CA. I was stranded in a little town called Junction TX. Middle of nowhere.... Long story short, bought a Jasper replacement and threw it in. Finished the trip and am now working motor issues...
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    1991 V2500 4l80e 1st Gear Issue

    well, good news and bad news. Found the problem, however, now I need to find parts. Looks like the Direct Clutch Plate that sits on the piston cracked, spun around until it had double layered itself, causing that set of clutch packs to always be engaged. I wondered why I had such a hard...
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    1991 V2500 4l80e 1st Gear Issue

    Well after further looking. I find that my converter with the number 8674193 is the dual stator HIGH stall converter as we all expected. That still doesn't explain why all of these local parts stores suggest the low stall. Good learning point, if you haven't known it already, parts stores only...
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    1991 V2500 4l80e 1st Gear Issue

    Everywhere I look, and all the parts stores call for the b81. I understand the 82 was for the sbc and the 81 should be for the BBC and diesel to match their power bands, yet it conflicts with all the vendors. I'll post a pic of the original converter to cross reference what I currently have...
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    1991 V2500 4l80e 1st Gear Issue

    Oh yeah, Parts came in today. Fast shipping!!! Box was all smashed though.... Pics to follow
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    1991 V2500 4l80e 1st Gear Issue

    I think I will end up with a B81 converter going into it. I considered a b82 as it is the higher stall, however, I think the B81 will be better as far as towing goes. I'm a little split on the decision, but we'll see how it works out for now.
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    1991 V2500 4l80e 1st Gear Issue

    Well, I got to thinking today and here are my thoughts so far which I will confirm soon. Transmission made a buzzing noise along with a hissing noise under load. Transmission dust cover was covered in a massive amount of fluid as well as fluid all down the rear of the trans/tcase and frame...
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    1991 V2500 4l80e 1st Gear Issue

    This is the kit I went with https://www.gmtransmissionparts.com/GM-4l80e-master-rebuild-kit-1991-1995/ Im looking for the best source for a new converter. Autozone,oriley ,Napa etc carry new Hampton, pro king and dance. Are any of those brands worthwhile?
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    1991 V2500 4l80e 1st Gear Issue

    I threw the only A and B solenoids in town into it before I tore it apart. Still didn't fix anything. Agreed, the wiring harness will be coming out. Rebuild kit getting ordered tonight to replace steels and clutches. I will pickup a master kit that includes new brass bushings as well. I'll...
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    1991 V2500 4l80e 1st Gear Issue

    Cant seem to find anything that would be causing the noise in the above videos. No loose parts or excessive wear. What's the best way to test out the converter. Besides flushing, I'm assuming use the inputs shaft(s) to spin and listen for noise... any suggestions?
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    1991 V2500 4l80e 1st Gear Issue

    Yeah, they are pretty black. Steels are scored as well. I went through the valve body last night, not finding anything wrong. On another note, the VB filters were clean as can be. Not a piece of dirt in them. I wonder if this is a reman VB?? After 200k miles + I would have expected to see...
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    1991 V2500 4l80e 1st Gear Issue

    Started dissembling last night... Here are the preliminary pics
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    1991 V2500 4l80e 1st Gear Issue

    Trans came out last night. Fluid isn't too burnt, however, considering that I just replaced it, it shouldn't be burnt at all. I think it is because, I got a great deal on a travel trailer and had no option but to tow with a bad trans. I just split the tcase and trans. Pulled off the converter...
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    1991 V2500 4l80e 1st Gear Issue

    You can hear the Buzzing at idle and how if flixuates with engine rpm. I was hoping for a cheap electrical problem to fix this, but the Buzzing leads me to believe otherwise. Trans will more than likely be coming out tonight. Any suggestions of what the Buzzing may be in the videos?
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    1991 V2500 4l80e 1st Gear Issue

    https://youtu.be/sqU-swBFe60
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    1991 V2500 4l80e 1st Gear Issue

    https://youtu.be/SsqI3Twj2GE
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    1991 V2500 4l80e 1st Gear Issue

    I'll look around to see if I can get a decent quote around here. I've done it in the past with other issues to get a second opinion, and can usually speed up the troubleshooting. Took a video today of the trans tunnel. You can hear a buzzing that changes frequency with engine RPM. Never heard...
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    1991 V2500 4l80e 1st Gear Issue

    I think either way I'm headed into this trans. Any input on which kits to buy. Should I go ahead and replace all pistons while I'm in there. Also, I got put in a bind and had to tow with the Burb. Didn't want to, but like I said, no choice. Reason I bring it up is because It did fine, working...
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    1991 V2500 4l80e 1st Gear Issue

    Still doing research, and ran across this.... Usually when I experience a bind up in reverse, it is because the forward clutches failed. The forward clutch is on in all forward gears only. When the forward clutches fail they go metal to metal and what you have is too much clearance in the drum...
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    1991 V2500 4l80e 1st Gear Issue

    Thats kind of where I'm at. I assume cross leak in the valve body, as being that when I pulled the pan, it had new style solenoids as if someone had been in it before. Along those lines, to try for an easy fix, I'm going to pick up a new valve body. Expense is right around 150, and If I end up...
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    1991 V2500 4l80e 1st Gear Issue

    some odd things I've noticed so far, it is a 91 trans for sure, and has the original old style electrical connector with the bolt in the center of it. The solenoids that were in it prior to me changing them were the newer style with the screens in them...Also, the pan had an odd style bolt in...
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    1991 V2500 4l80e 1st Gear Issue

    Thanks, I could only be so lucky to hear from them. I've done many engines and a few trans, but this is my first venture into a 4l80e. by the way, $1300 bought the suburban!!!
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    1991 V2500 4l80e 1st Gear Issue

    Oh and did I mention, Factory installed Sidewinder Winch....
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    1991 V2500 4l80e 1st Gear Issue

    Hey all, New to Square Body's and the forum. I picked up this 91 Suburban and love it. It does however have an issue with 1st Gear. Let me start by saying that after trying to diagnose this issue, I eventually decided to stop trying to fix it where I bought it and drive it back home...

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