4L80 No gears
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4L80 No gears I did the wire changing in the plug from 4L60 to 4L80 and the pin 45 to the #26 position in the T42 plug. I used the Gen 4 version since I am using a E38 and T42 combo.
On pin E of the trans plug, I have 12 volts. The trans is full of fluid. The wiring harness in the trans is new. All new parts in the trans.
I can start the engine and move the shifter thru the gears and --nothing. Any ideas where to start trouble shooting this??
Thanks
With the trans plug removed, still no gears. should have 2nd with the plug removed.
I tried HPTuners scanner to force it into any gear---no gears
On pin E of the trans plug, I have 12 volts. The trans is full of fluid. The wiring harness in the trans is new. All new parts in the trans.
I can start the engine and move the shifter thru the gears and --nothing. Any ideas where to start trouble shooting this??
Thanks
With the trans plug removed, still no gears. should have 2nd with the plug removed.
I tried HPTuners scanner to force it into any gear---no gears
Last edited by dw456post; Jan 18, 2024 at 02:00 PM.
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Hi Jake, It's been a while since I filled the trans. I don't remember the number of quarts. I measured the dipstick with the pan off and adjusted it (Lokar). Shows full---engine running in park. What pressure gauge can I use and hook up point.
My GTO (sold) 4l80 is still running great---long time. I am in FL now.
I ordered a pressure tester gauge.
My GTO (sold) 4l80 is still running great---long time. I am in FL now.
I ordered a pressure tester gauge.
Last edited by dw456post; Jan 18, 2024 at 04:52 PM.
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From: BERWICK PA
If you have 0 presure one of three things it can be, Wrong converter not engaging put (very unlikely) Broken pump (Probable) PR valve snap ring was not seated and blew out of pump. I would drop pan look at that first since got to drain anyway , Then if its not that start pulling it back out to inspect pump . Those are the only things short of no fluid in trans that could leave you with no line at all .
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From: Nitro Alley
Stock 4L80Es that have a Gasoline Engine, should have 1/8" to 7/32" Torque-Converter Pull-Out.
5/32" is Fine, as the Minimum is 1/8" and that is equal to 4/32".
Remove and Disassemble the Oil-Pump.
5/32" is Fine, as the Minimum is 1/8" and that is equal to 4/32".
Remove and Disassemble the Oil-Pump.
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I will pull the pan and see if anything jumps out. And get ready to pull the trans.
I am not looking forward to doing that messy job. I was ready to drive this thing.
Maybe I forgot to install the filter--Naaa
Thank you guys for helping!
I am not looking forward to doing that messy job. I was ready to drive this thing.
Maybe I forgot to install the filter--Naaa
Thank you guys for helping!
Thread Starter
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Joined: Nov 2005
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If you have 0 presure one of three things it can be, Wrong converter not engaging put (very unlikely) Broken pump (Probable) PR valve snap ring was not seated and blew out of pump. I would drop pan look at that first since got to drain anyway , Then if its not that start pulling it back out to inspect pump . Those are the only things short of no fluid in trans that could leave you with no line at all .
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From: BERWICK PA
That will indeed make 0 presure lol but easy fix ay least just make sure its seated in the groove this time.
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I am a little worried that the trans is damaged from the idle time that I have on the new motor. I had no reason to try and put it into gear when I was trying to get it running. Trans was unplugged. Was that the same as running it dry with that relief valve blown out? There was a tiny bit of clutch material in the pan.
Thanks
Thanks
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From: BERWICK PA
I am a little worried that the trans is damaged from the idle time that I have on the new motor. I had no reason to try and put it into gear when I was trying to get it running. Trans was unplugged. Was that the same as running it dry with that relief valve blown out? There was a tiny bit of clutch material in the pan.
Thanks
Thanks
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From: BERWICK PA
The tiny bit of material is probably just what I call hidden trash can be in nooks and crannies in pump, cooler, planets and is always present after a build to varying degrees . clean builds will have very little , But still its why I have people change filter at about 500 to a max of 1000 miles first change then normal routine after .
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Trans goes into all gears---sitting on the rack. Not driveable yet. 100# pressure in all gears at idle. Gotta bleed the brakes and go for a drive. It would be nice to have a windshield at some time also.