2.3 to 4.0 sohc, transmission issues
#26
Not sure what the 2 wire plug in is but I know I took a different plug off of it... the connector with chewed wires was just floating under the intake manifold. Here’s the diagram I’m using indicating it’s going to an o2 sensor... at least I think that’s what it says, I’m proficient in reading wiring schematics...
#27
#28
#29
#30
#31
Not sure why you would have suddenly gotten the P0500, never asked if it was there before the suspension work
it only shows up after warm up because thats when computer will set codes usually, closed loop
It could just be you have a non-related transmission issue that showed up a week after your suspension work, odd but certainly can happen
I am little confused to, just pull up the 1997 and 2000 5R55E diagrams to compare and BOTH show OSS sensor
Does it have a transfer case, because that is were the OSS for speedometer would be, different than 2WD because of 4Low, different than the OSS used for shifting
it only shows up after warm up because thats when computer will set codes usually, closed loop
It could just be you have a non-related transmission issue that showed up a week after your suspension work, odd but certainly can happen
I am little confused to, just pull up the 1997 and 2000 5R55E diagrams to compare and BOTH show OSS sensor
Does it have a transfer case, because that is were the OSS for speedometer would be, different than 2WD because of 4Low, different than the OSS used for shifting
#32
It wasn’t there *to my knowledge* when i left my uncles shop to drive it home it had a charging problem, so we hooked up his fancy scan tool. Turned out to be the alt trigger wire but during the scan, the only other codes were from disconnected evap ****... the transmission is 2wd, no transfer case. And to elaborate on the p0500, not only does it throw the code but from a cold start it will shift fantastically until It heats up. Then starts tripping and p0500 simultaneously...
as for a non wiring related issue, I’ve been there, done that. 2 trans shops said “shift solenoids aren’t functioning properly, replace them” so I put in a new valve body with new shift solenoids, gaskets, filter, etc. rookie mistake, this setup has roughly 5k miles on, it’s very unlikely something happened to them while sitting over the course of a year... THEN I got my hands on a scanner and saw p0500. Messed with it for a while, gave up and took the truck to a trans shop for a GOOD scan. Told me the trans functions perfectly and to come back when I fix these issues:
since then I’ve added a BOO, vss signal, disregarded the o/d button and ect code...
as for a non wiring related issue, I’ve been there, done that. 2 trans shops said “shift solenoids aren’t functioning properly, replace them” so I put in a new valve body with new shift solenoids, gaskets, filter, etc. rookie mistake, this setup has roughly 5k miles on, it’s very unlikely something happened to them while sitting over the course of a year... THEN I got my hands on a scanner and saw p0500. Messed with it for a while, gave up and took the truck to a trans shop for a GOOD scan. Told me the trans functions perfectly and to come back when I fix these issues:
since then I’ve added a BOO, vss signal, disregarded the o/d button and ect code...
Last edited by Garrettw_; 09-25-2019 at 11:16 PM.
#33
here is the 1997 5R55E diagram I have, VSS is at top left, OSS bottom left
The VSS signal, what you get from SGI-5E now, is connected to 58 AND 33 case ground
25 is also a case ground in 1997 like it is with your 2000 harness
But still at a loss as to why you didn't have P0500 from day one
Just FYI the "overdrive drum sensor" in the diagram was never used, and deleted in 1999
The VSS signal, what you get from SGI-5E now, is connected to 58 AND 33 case ground
25 is also a case ground in 1997 like it is with your 2000 harness
But still at a loss as to why you didn't have P0500 from day one
Just FYI the "overdrive drum sensor" in the diagram was never used, and deleted in 1999
#34
#35
#36
#38
Thanks for the reply. The dash is 1994, the speedo does not work because I have a 9” axle and the old vss cable/sensor removed... do you know if it’s possible to flash a 1997 ecu to get its speed signal for the transmission from the oss? I don’t have any desire to make the speedo work, just need transmission function back...
the speed sensor on a 55r55e transmission is actually internally mounted and has a connection inside transmission. That’s why you can’t find it. You’ll have to rebuild trans to fix
Thread
Thread Starter
Forum
Replies
Last Post
UNCCRang49
Interior Semi-Tech
3
02-10-2008 10:54 AM