4l80e speed sensors and external wiring info

Рет қаралды 32,770

4 жыл бұрын

Working on my 4l80e in my 92 chevy pickup with the 6.5 diesel.
Codes 85 and 87 undefined ratio error.
Speed sensors information.
Great informational articles related to the 4l80e and model year changes from start of production in 1990-2000.
atracom.blob.core.windows.net...
www.novak-adapt.com/knowledge/...
www.transgo.org/demo/8th-4L8.pdf
www.msgpio.com/manuals/mshift/...

Пікірлер: 43

@destro513 3 жыл бұрын

My VSS plugs were switched and my truck never ran right. I swapped them and this video saved me so much. Thank you

@Bretmckinney 4 жыл бұрын

I’m glad I was able to help someone. I spent over 40 man hours looking over my transmission to find that ring missing. Let me know if you need any other help with your electronics on your trans. I sure learned a lot!

@Naser_astronomy 4 жыл бұрын

Bret McKinney hey I have Gmc suburban 2000 , the truck does not move in any gear , in other word , when I’m shift gear to D,R,3,2,1 the truck does not move ? Please need help.

@diduck6878 3 жыл бұрын

@@Naser_astronomy 8-12 quarts of fluid?!. Does it have a filter?

@tylerjackson116 Жыл бұрын

It helped me out i couldn't find in which side of the clip the green and yellow go and had them backwards on the other clip cool thanks man

@LC-fl3zm 4 жыл бұрын

You really helped me out I had to replace my transmission in my 02 2500 and the abs light is on the speedo don’t work and I don’t feel it shifts quickly enough I replaced the seed sensor o the transfer case but that didn’t do a thing I found that my output sensor has a plug instead of a sensor so I ordered a new output shaft hop it has that relucter wheel thanks for you video

@diduck6878 3 жыл бұрын

There's also 3 sensor's on the transfer case

@DanMcD80 3 жыл бұрын

Oil in the case connector is a common issue and will cause a limp mode situatiom

@daviddenson3324 7 ай бұрын

Will that also cause the Ign 0 fuse to blow?

@11688josh Жыл бұрын

So far there's very little electrical wiring and the ECM pin outside c are different from the colors on the plug so there's something probably in between there changing the colors in between the ECM and the VSS output sensor

@Bretmckinney Жыл бұрын

I was thinking they were a twisted pair that went directly to the TCM, possibly a bulk head connector. Are you having trouble with your transmission?

@LsMaloo 2 жыл бұрын

Where can I get a exploded of the transmission like the one in this video? Cheers 🍻

@Bretmckinney 2 жыл бұрын

I would just look on google under images of 4l80e parts diagram. Are you having issues of setting up a transmission?

@LsMaloo 2 жыл бұрын

@@Bretmckinney I have just bought one for a project car and I would be keen to pull it down myself and go over it. While it’s apart I’d like to give it a freshen up.

@Bretmckinney 2 жыл бұрын

I strongly suggest you buy this book when rebuilding your trans. It’s a good reference and has lots of pictures with a lot of transmission specs in it. I rebuilt a 48re Chrysler transmission and I could not have done it without the book for it. www.amazon.com/ATSG-4L80E-Transmission-Repair-Manual/dp/B002LL3UA8/ref=mp_s_a_1_2?crid=1DJCOVQ8AAOPR&keywords=4l80e+book&qid=1653924242&sprefix=4l80e+book%2Caps%2C200&sr=8-2

@ROSSCO2250 Жыл бұрын

I am little confused with the operation(or lack of) my speedometer.... 92 k3500 6.5 diesel 4x4.. my speedometer does not work i have no codes. I see what I believe to be the speed sensor on tail of Tcase but NO wires to be found anywhere... is it possible the signal comes from tranny? Where do I start to trouble shoot this? Thanks great videos

@Bretmckinney Жыл бұрын

I’m really queries to know if you have 2 speed sensors on the side of your transmission and if your cruse control works? Some newer vehicles only had one transmission sensor on the side of the transmission. I think you are correct about the one on the tcase being the speedometer sensor. It should have a wire going to it. Tell me more about this truck. Is it original engine and trans? I have a feeling someone might have put a trans or tcase in from another year.

@Bretmckinney Жыл бұрын

Also you should have a detent switch on the top of the tcase. Really possible your VSS is just not hooked up. It’s pretty hard to see the wiring under there.

@user-pk6we2gn6s 5 ай бұрын

I have a question I have a 2000 gmc sierra 4x4 turn out the original 4l60e was swapped for 4l80e had it rebuilt I was told it only had one speed sensor but should have 2 front input speed sensor my truck has been working fine until day before yesterday normal acceleration hopped on the freeway got to about 60 and it slowed down and heard a metal thump or grind would that front input sensor have anything to do with that? Trans has been fine until now thank you!

@Bretmckinney 5 ай бұрын

Did you get this fixed? Sorry for the late reply. Sounds like a large internal failure. Overdrive possibly.

@user-pk6we2gn6s 4 ай бұрын

Not yet taking back to the trans shop they don’t have any electrical ppl so I’m trying to rewrite the second speed sensor

@Bretmckinney 4 ай бұрын

@@user-pk6we2gn6s I do have the bottom link that shows the 2 sensors and the pin location…. Sorry I’m not more help.

@user-pk6we2gn6s 4 ай бұрын

@@Bretmckinney I appreciate the help I did find a good video with a lot more detail thank you for the fast response !

@G.W59 3 жыл бұрын

I've had a problem with my 95 4l80. The torque converter won't lock up. I replaced the TCC solenoid cause I couldn't get a reading from it and still having issues. In the middle of replacing the torque converter itself. Hopefully that will do it. If not I may just send it to the shop to get scanned and checked out. ☹️

@Bretmckinney 3 жыл бұрын

Things that come to mind are possible temperature sensor reading low not allowing it to upshift. My dads pickup had that issue and it was the torque converter itself. It would Shift in and out “shuttle shift” then kick it out completely after the check engine light came on. Just because the speedo works does not mean the transmission Computer is seeing speed. I would also air pressure check that the clutch pistons are not leaking air. If it never try’s to shift I would say it’s electrical. I’m no transmission expert though. TPS sensors do go bad... let me know what fixes it.

@Bretmckinney 3 жыл бұрын

Any codes??? Blink codes can help a lot and can be retrieved with a paper clip.

@avragejoe1 Жыл бұрын

I'm trying to Figure out why I don't have the Wiring to plug into my rear speed sensor, I have a wire that looks like a single plug the size of a pencil eraser with nothing to connect to. so Lost currently

@Bretmckinney Жыл бұрын

Some vehicles need that sensor, and some don’t. What model year you working on? Are you installing a different transmission?

@jaydepage607 2 жыл бұрын

Could these sensors put your pickup in limp mode

@Bretmckinney 2 жыл бұрын

For sure!!! What issues are you having?

@myguitaryourface5160 2 жыл бұрын

The plug on the side of the transmission gets filled with fluid unplug it blow it out with a air compressor, vasoline it inside and limp mode go's away

@tommyfpv5476 2 жыл бұрын

my 2011 gmc sierra 1500 is having an issue thought the trans was slipping had it rebuilt and still have the same problem I'm lost

@joshshaffer3716 Жыл бұрын

@@myguitaryourface5160 how much Vaseline are we talking about? Fill the plug or just cover the pins?

@myguitaryourface5160 Жыл бұрын

@@joshshaffer3716 I just put as much as possible in it

@bossmodetubby 2 жыл бұрын

Wait a minute there’s 2 speed sensors?!?!

@Bretmckinney 2 жыл бұрын

2 trany sensors for computer and a sensor for the speedometer on transfer case. I’m thinking after 1992 or 1993 they integrated the transfer case sensor into tcm to be able to get rid of one sensor. Your 4l80e case will still have a hole for one but will be plugged with a cap and the internal tone ring will be missing. This is normal. What issues are you having?

@bossmodetubby 2 жыл бұрын

@@Bretmckinney I’m getting code 24 on my 93 k1500 I’ve already replaced the speed sensor I’m just confused because I see there might be a second speed sensor I’m unaware of

@Bretmckinney 2 жыл бұрын

@@bossmodetubby That code from what I read is for the vehicle speed sensor on transfer case. Is that the sensor you replaced? It can be hard to see or put you hands on. What engine do you have?

@Bretmckinney 2 жыл бұрын

@@bossmodetubby Transmission speed sensor www.amazon.com/ACDelco-24203876-Equipment-Automatic-Transmission/dp/B0013FTZUC/ref=mp_s_a_1_3?crid=55QW2V7YZ3R3&keywords=4l80+speed+sensor&qid=1637605674&sprefix=4l80+speed+%2Caps%2C260&sr=8-3 Vehicle speed sensor www.amazon.com/ACDelco-19302667-Original-Equipment-Vehicle/dp/B00S0FOD14/ref=mp_s_a_1_4?crid=3KR4HPSOWQUFT&keywords=1993+k1500+vehicle+speed+sensor+acdelco&qid=1637605842&sprefix=1993+k1500+vehicle+speed+sensor+ac+delco%2Caps%2C188&sr=8-4

@niuafeafepese792 8 ай бұрын

Plss I’m tryna find where the speed sensor of Yukon 2007xl locate at 🤦‍♂️ is it the same with that one