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Oh ok. Thanks. Yeah, as far as I know, that plug your showing wont have anything to do with the trans (but fix it of course.)
Yes, That's right. Tach/rpm sensor = same. Well, what are the odds you'd put that old one in and then get a code? haha Is that why you changed it? Or you just changed it in hopes? I'm guessing in hopes, cus you didn't know what code 14 was right?
Yeah, so I'd test it (the old one). The trans controller doesn't like it, cus it's set code 14. I bet it wont read between 2k-3k ohms then? At any rate, put that new one back in, because you didn't get code 14 with the new one in right?
......Oh nevermind, I can't read. You did get a code and you changed it out because of that. Nice job! Put the new one back in. Trans guy was wrong to tell you to put that back in there.............Now here's to hoping he was also wrong about passing your old solenoid pack too.
Oh ok. Thanks. Yeah, as far as I know, that plug your showing wont have anything to do with the trans (but fix it of course.)
Yes, That's right. Tach/rpm sensor = same. Well, what are the odds you'd put that old one in and then get a code? haha Is that why you changed it? Or you just changed it in hopes? I'm guessing in hopes, cus you didn't know what code 14 was right?
Yeah, so I'd test it (the old one). The trans controller doesn't like it, cus it's set code 14. I bet it wont read between 2k-3k ohms then? At any rate, put that new one back in, because you didn't get code 14 with the new one in right?
......Oh nevermind, I can't read. You did get a code and you changed it out because of that. Nice job! Put the new one back in. Trans guy was wrong to tell you to put that back in there.............Now here's to hoping he was also wrong about passing your old solenoid pack too.
You are correct on all accounts. It’s going back in along with the pack!
The moment you’ve all been waiting for…..drum roll…..
No dice. New solenoid pack is in and it still shifts crazy early and bogs down. We also re worked the engine, chassis, & wire harness grounds on the tops of each fender. Kinda at a loss right now. Definitely left feeling like I had the fight taken outta me. Pretty bummed.
Open to any and all ideas, you’ve all been so helpful and the combined wealth of knowledge I’ve found on these forums has really kept me going.
Also to put the FIPL sensor voltage to rest I re adjusted it to 1.21vdc at idle after I had sufficiently warmed up the truck and unplugged the cold idle solenoid. Didn’t help any but it’s good to remove that from the questions
Question, would my 91 potentially have a PSOM issue causing this? I have a little needle flutter at low speeds between 5-15mph. Always have. I pointed it out to my transmission guy when I initially took it in for rebuild but he said that wasn’t an issue "the flutter at low speed’. Does the VSS signal go to the dash before going to the PCM?
Last edited by 4x4E350Ambo; Dec 4, 2024 at 05:39 PM.
Question, does the torque converter make a grumbling sound when it’s trying to engage too early? Wondering if that’s also happening because that’s what I’m hearing when it does this and it sounds like crap.
Describe this some more if you can. The more details you can use to describe the sound, the better.
Ask your trans guy if he re-used either the converter or the pump.
So right now, your only systems is the trans is shifting super early, and it's making a bad sound as it shifts or when the converter locks. Once up to speed, driving in OD, you wouldn't know there ever was a problem with the trans, correct?
Describe this some more if you can. The more details you can use to describe the sound, the better.
Ask your trans guy if he re-used either the converter or the pump.
I know the converter was reused. He said it looked good on inspection. I’ll ask if pump was reused, I would think so but I’ll confirm. Also it turns out the solenoid pack we pulled today was in fact a new one that his second builder had put in the trans when they were assembling it. He was not aware he had put it in. I would also add that the trans fluid was spotless today when we opened it up. I’m thinking that bit of residue I was picking up on the dipstick was a bit of material from the clutch packs break in
Regarding the sound, I would say the sound is similar to gargling water when it’s really bogging down at its worst.
When the strange low speed surging is happening it would sound like if you were to make a "Vvvvvvv errrrrrrr vvvvvvvvv errrrrrr" sound when it’s doing its dance
I wish I had a way to see if the early shifting was because the transmission was being told to shift or via a corrupted signal while it was happening. Would cut troubleshooting possibilities in half.
Last edited by 4x4E350Ambo; Dec 4, 2024 at 06:56 PM.
So right now, your only systems is the trans is shifting super early, and it's making a bad sound as it shifts or when the converter locks. Once up to speed, driving in OD, you wouldn't know there ever was a problem with the trans, correct?
Exactly correct. Cruising at highway speed on relatively level ground without hill climbs you wouldn’t have a clue there was an issue
Regarding the sound, I would say the sound is similar to gargling water when it’s really bogging down at its worst.
That sounds like the pump is starving. You don't have a 4wd pan on there, with a 2wd filter do you? Does your pan have a drain plug?
A converter needs to be cut open to know if it's good. You can't just look at the outside. The only thing you could tell by the outside, I suppose, if whether it got too hot at some point.
That sounds like the pump is starving. You don't have a 4wd pan on there, with a 2wd filter do you? Does your pan have a drain plug?
A converter needs to be cut open to know if it's good. You can't just look at the outside. The only thing you could tell by the outside, I suppose, if whether it got too hot at some point.
it’s a 4r100 pan with a drain plug from factory.
Not sure if this is known but my truck is a 4x4. It was converted by the fire department during initial purchase in 91. I have a NP205 TC married to the transmission. Not sure if helpful info or not.
The gurgling sound has not happened recently, but it has happened while the issues have been in the process of troubleshooting. Seems like that sound pairs up with the early shifting under load. Worst I’ve experienced is after an hour + drive on the freeway then going into bumper to bumper traffic. Really sounds like hell going from start to stop so frequently .
You're 100% sure you have a 4wd filter in there? You understand it's got a longer pickup on it, than a 2wd filter? When you pulled the pan, the filter hadn't fallen out, down out of the o-ring did it?
Also it turns out the solenoid pack we pulled today was in fact a new one that his second builder had put in the trans when they were assembling it. He was not aware he had put it in.
So code 99 was thrown with a new pack, we now know. Does "new" literally mean "new" "reman"? This "new" one is out, right now correct and the "used" one that you just picked up is still in there? Have you tested the "new" one 100% according to the diagram? PLUS applied ground to pin 11 and power to pin 12? And if so, does it click when you apply and remove ground?
We also know code 99 isn't being thrown consistently. This points to a bad connection or wire....provided the (whatever pack is placed in there) and the pack is tested 100% and passes 100%.
When you set the TPS, you did check the reverence wire for 5v too right? Use the Ground wire at the TPS with your meter.
(that PDF diagram, makes it look like ground is on top, but it's the bottom, right? Anyway, I think so. Just swap the meters prongs into the top and the bottom and make sure one way or the other reads 5v. Key on.)
I don’t recall if it was said, but It was shifting beautifully for about a week after the trans was put in the vehicle.
I don't recall that. That also points to bad wiring between TECA and solenoid pack connector. So it can also be said, verify or correct this statement:
"The transmission was shifting poorly. It got rebuild. Worked great for one week, then worked exactly the same way the trans originally worked before being rebuilt".
Be sure to answer questions in posts #57 and #58 above too.
