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Some of you may have read about my exploits with the 4L80 trannie driving me crazy. First off I am not an electrical guy like my son is. After reworking the transmission and engine harness he wanted to know if resistance was calculated into the chassis for sensor and signal back to the ECM. I...

Hey man, I wasn't kidding about the circular saw advice. That happened during the truck project so I was even more crippled up than normal. Thanks for letting me know that I am not alo

Please excuse me for taking so long to update. We finally got back on the truck wiring harness this past Saturday so installing the transmission is next. We found several areas that could cause problems like chafing, incorrect harness routing and a general mess overall. Now after son finished...

It's been awhile since I said I would get the trannie out but a few health issues forced a work storage. I listened to everyone's advice and everything is good to go. We only got the transmission out yesterday. I removed the rear vss on the removed transmission and compared it to the...

No sir I have not removed the sensor to verify. I will get this done this weekend. Sorry about the delay but I have doctors appointments for the next two days. These bits of information are what I'm looking for. As I said earlier I am not up to speed on the electrical system. I am a body...

The plug on the donor transmission is plastic and is over flush to the case. The pictures here are of the OEM transmission that is in the truck now. I'm hoping with the help of the pro guys here I'll know exactly what I need to do so to make this sucker work. They are kinda saying it doesn't...

The first picture is of the rear vss located just above the round blue connection on the transmission case. We had left it unplugged while trouble shooting The second picture is the front vss, if I can load it one time.

I have just finished a nice meal of crow! The truck is a 1996 K2500 special order for fleet service. That might be the only part I've gotten right. The coolant lines are not fore aft as my son in law reported but are both front connect. I should have checked behind him. I do apologize with...

I'm doing a little better so maybe I can get this done in the morning. I'm as curious as you are. Oh yeah, the oil cooling lines are factory, I can promise you all that much. They are front and rear with all O.E.M.passenger side retainers and clamps with factory bends. Richard

Gentlemen, thank you for jumping in and sharing your knowledge. I did get some pictures but can't upload at this time, the pain is just too great. I'll try a little later this evening. Richard

I'm trying to find the pictures now of the underneath so we'll be on the same page. I'm going now to get new pictures in the mud. Be back shortly, and many thanks for sharing your knowledge.

Excellent point and one I had not considered. I saw in the history of the truck that it was on the west coast for a number of years and came back south. I think you just nailed it. Thank you sir. Richard

GREAT, I like to ask first so I don't get run off. I'll post pic's tomorrow due to mounting pain in my back. Thanks to everyone that has contributed in this effort. Richard

Thank you sir. Here comes the confusion, my truck is a 1996 K2500HD. The coolant lines are exactly as you described for the later years. My lines are located front and rear, contradicting everything I have researched. Line size are the same as the 98 year model. My 96 trannie does have the...

Twice Retired

Update, I checked my crimper and it is for Deutch pins only and will not work on Amps pins. Will, you have the best idea I have heard. That's the reason I'm here, to ask all the smart guys. I still need to go thru the electrical system to undo bad craftsmanship. On my last post I said some...

Thanks Will, my transmission harnesses look ragged anyway. I counted 5 butt splices while cleaning up another mess under there. Under the dash is just as bad. The previous owner in his infinite wisdom spliced into the brake light switch for some reason. He even used one of the little blue splice...

Well the advantages of having a good young man dating my granddaughter seem limitless. Yes the pan has 17 bolts with the right shape. It also has the number 9 cast into the bellhousing which I read denotes 4L80. If I can contribute any more information please tell me and I will jump thru hoops...

You are very correct on all points. I have had some medical problems the past 5 years so I am limited somewhat in movement. The transmission is sitting on a creeper and kinda hard to check the pan. . I'll con somebody into helping me. My G.M. electronics book touches on the subject but then...