4l60e transmission issues!
Thread Starter
Staging Lane
Joined: Jun 2020
Posts: 74
Likes: 2
Look just a fast update because I haven't been updating the post. I don't mean to being neglecting the post I started.... Iv been working 14 hour days and only getting 3 or 4 hours of sleep a night..... Very tired very aggravated.......
The only thing that leads me away from believing that this transmission issue is caused by the ABS or wheel speed sensor issue is - my 2003 Cadillac CTS 3.2 throws abs codes and wheel speed codes sensor codes..... It claim the right front wheel speed sensor is bad..... However after it got hit a few months ago - the lights disappeared and stayed off for almost 2 mouths. And I was putting 400 miles on the car a day.... Lol 😂😂😂 anyway in the last month or so it started coming back.... I'll back out the drive way and it will pop the abs light on then the traction control light comes on..... It also throws codes for every 02 sensors..... But yet ( 20$ puts over half a tank in it ) I can't drive it like a race car - get on the highway drive 150 miles to work and only use 1/4 a tank driving at 85mph...... I literally make a 400 mile trip out of 25$ .... It's a damn good car other then the oil leak - I'm no longer sure wear it's leaking ( thought it was valve covers but now I'm not sure ) sometimes it smokes like it's on fire ( like it some kinda monster car ) in that 400 miles I'll have the put a qt to 1/2 qt in it...... There are other issues with it but nothing major..... Anyway it doesn't ever seem to have a shifting issue..... There have been times I thought it short shifted or shifted soft or weird but nothing like what the truck is doing.... Maybe it's because it's a different engine and transmission package idk.....
I got that code scanner on the way - I got the wheel bear with sensor on the way.... - I'm gonna go to salvage this weekend and rob a abs brake modular.... I got the scanner on eBay for 108$ new. Wheel bearing for 38$ and the moduler for 20 with 2 year warranty.... And air ride compressor for 20 2 year warranty. Will update Monday!
Thread Starter
Staging Lane
Joined: Jun 2020
Posts: 74
Likes: 2
Ok so I got the code scanner in today......
First thing I did was clear all codes......
The good news.... None of those Abs codes came back except - co288 and the wheel speed sensor code.... I cleared the codes multiple times and non of them once came back except these two - they would come back instantly ( as soon as I cleaned them ).... So I changed the hub and speed sensor - again cleared codes........ The codes for wheel speed sensor stayed home until I started driving it.... It once agaain came back - saying erratic readings..... However I checked it's value in park at a stop and it matches the rest of the sensors ( 5 )....... Now it's only having issues driving?
I changed the Master cylinder and reservoir and sensor.....
Still have soft brakes - but I haven't got to bleed them yet -
When I try to bleed the rear (abs bleed) the code scanner won't doing it with faults being found..... Ugh.
It appears all those extra codes wear from me unplugging the fuse.....
So abs light still comes on when started.... Codes are for wheel speed sensor and c0288....
Any thoughts.
TECH Junkie
Joined: Jun 2008
Posts: 3,194
Likes: 1,377
From: Nitro Alley
On the GMT800 trucks (like your 2002 Escalade), I have found that the twisted pairs (wiring to the wheel-speed sensors) are often damaged...
and not have an actual sensor be faulty/ inoperable.
When reading the 4 wheel-speed sensors for speed... do all 4 show approximately the same speed while driving straight?
-If YES, they all seem to correlate; then the EBTCM may be faulty.
-If NO, and you have one sensor showing a drastically different speed (or is stuck at one speed), then you may have damaged wiring.
These speed-sensor twisted pairs are not to be repaired/ spliced back together if damaged.
The resistance of these circuits is crucial for proper operation... and repairing the wiring can change the resistance value of the circuits.
If you have damaged wiring... you replace the entire run of wire (you will have to talk to a GM parts Dept. for info on a harness).
These sensors and wiring are also highly susceptible to the dirty electricity running through the truck from high amperage circuits.
In the aftermarket, these circuits most always have shielded wiring harnesses. EMFs and other electrical noise can cause issues with circuits like the twisted pairs for the wheel-speed sensors.
You previously had codes that pertain to the circuits for the Front Passenger side wheel speed-sensor (C0221, C0222, and C0223).
Now you have 1 code that pertains to both the Front and Rear Driver side wheel-speed sensors...
The EBTCM compares these two sensor readings to one another and sets this code when they do not correlate properly.
We do not know yet which DTCs are erroneous and which are valid...
But if C0228 is now "Hard-Set", then this is most likely an actually valid DTC.
Refer back to what I said above, in regard to the sensor readings being the same or different...
You may have a bad EBTCM.
Have you noticed if the ABS pump/ motor and/ or the Brake-Pressure Modulator-Valve assembly is turning on/ making noise when the ABS in not doing anything?
Also did you say: all 4 of the wheel speed sensors are reading: 5 MPH when the vehicle is completely stopped???
If so... that is not right.
In that case, you should unfortunately find a GM dealer that can still test these OLDer ABS systems.
Ideally have the EBTCM and BPMV tests done via the GM/ Delphi ABS testing equipment (If still available).
Good luck!
and not have an actual sensor be faulty/ inoperable.
When reading the 4 wheel-speed sensors for speed... do all 4 show approximately the same speed while driving straight?
-If YES, they all seem to correlate; then the EBTCM may be faulty.
-If NO, and you have one sensor showing a drastically different speed (or is stuck at one speed), then you may have damaged wiring.
These speed-sensor twisted pairs are not to be repaired/ spliced back together if damaged.
The resistance of these circuits is crucial for proper operation... and repairing the wiring can change the resistance value of the circuits.
If you have damaged wiring... you replace the entire run of wire (you will have to talk to a GM parts Dept. for info on a harness).
These sensors and wiring are also highly susceptible to the dirty electricity running through the truck from high amperage circuits.
In the aftermarket, these circuits most always have shielded wiring harnesses. EMFs and other electrical noise can cause issues with circuits like the twisted pairs for the wheel-speed sensors.
You previously had codes that pertain to the circuits for the Front Passenger side wheel speed-sensor (C0221, C0222, and C0223).
Now you have 1 code that pertains to both the Front and Rear Driver side wheel-speed sensors...
The EBTCM compares these two sensor readings to one another and sets this code when they do not correlate properly.
We do not know yet which DTCs are erroneous and which are valid...
But if C0228 is now "Hard-Set", then this is most likely an actually valid DTC.
Refer back to what I said above, in regard to the sensor readings being the same or different...
You may have a bad EBTCM.
Have you noticed if the ABS pump/ motor and/ or the Brake-Pressure Modulator-Valve assembly is turning on/ making noise when the ABS in not doing anything?
Also did you say: all 4 of the wheel speed sensors are reading: 5 MPH when the vehicle is completely stopped???
If so... that is not right.
In that case, you should unfortunately find a GM dealer that can still test these OLDer ABS systems.
Ideally have the EBTCM and BPMV tests done via the GM/ Delphi ABS testing equipment (If still available).
Good luck!
Teching In
Joined: Sep 2020
Posts: 42
Likes: 2
:-)
As I had said in my last post; I am not saying that your transmission builder is not very good.
I do not know the person.
He may be a great person, a great automotive technician, a great businessman or employee, he may be great at diagnosing, repairing, and rebuilding transmissions.
I do not know... and that is because I do not know the man.
Many, many transmission builders diagnose, repair and rebuild transmissions with great success.
Modifying transmissions is an entirely different story.
The success rate for people who do not specialize in "Performance Modification" is incredibly low.
The only thing that I do know; is that he made a modification on a transmission that 95% of people who specialize in modifying this transmission would not do under the current circumstances.
I do not think anything bad of the man.
Transmissions that are this plentiful and popular, have new updates, new parts, and new techniques constantly coming out.
My only opinion of the man; is that it would be a good idea to re-educate himself on this transmission before performing modifications.
I mean no offense towards himself or to you.
As I had said in my last post; I am not saying that your transmission builder is not very good.
I do not know the person.
He may be a great person, a great automotive technician, a great businessman or employee, he may be great at diagnosing, repairing, and rebuilding transmissions.
I do not know... and that is because I do not know the man.
Many, many transmission builders diagnose, repair and rebuild transmissions with great success.
Modifying transmissions is an entirely different story.
The success rate for people who do not specialize in "Performance Modification" is incredibly low.
The only thing that I do know; is that he made a modification on a transmission that 95% of people who specialize in modifying this transmission would not do under the current circumstances.
I do not think anything bad of the man.
Transmissions that are this plentiful and popular, have new updates, new parts, and new techniques constantly coming out.
My only opinion of the man; is that it would be a good idea to re-educate himself on this transmission before performing modifications.
I mean no offense towards himself or to you.
Thread Starter
Staging Lane
Joined: Jun 2020
Posts: 74
Likes: 2
Thread Starter
Staging Lane
Joined: Jun 2020
Posts: 74
Likes: 2
New transmission - shift kitted - seems to have fixed the issues!
Thank you guys! Truck seems to be shifting as it should!
Iv still got the brake issue - going to start a new topic - hope to see you guys over there! Thank you all!
Registered User
Joined: Oct 2020
Posts: 5
Likes: 0
4160e Hi. Any help is much appreciated. Driving at 120 km per hour in cruise control, approaching a hill the trans downshifts. The engine hits large revs and trans is not engaged. Pull off and realize there is a pin hole leak in trans line. Drive to nearest exit and fix line with rubber and hose clamp. Fill trans up and tranny is not shifting properly. 1st to 2nd - perfect. 2nd to 3rd it revs up until I let throttle off and it will shift to 3rd. No shift from 3rd to 4th. Manual shifting, there is no slipping in 1st ,2nd, or 3rd. Changed filter an probably most trans fluid due to leak and filter change. Thanks in advance for any advise. Also, while manual shifting, it wont go into 3rd. Unless I put into drive.