4L60E Full rebuild, now stuck in Limp Mode, I think. First off thanks for letting me join your forum. I own a 2000 Chevy Silverado 4x4 with the 5.3L 4L60E Trans in it. I bought the truck because the trans was toast, they had no reverse or any other gears. I used the Transmission Bench videos and delux package to replace just about every part in the trans. The valve Body received a new wiring harness,Accumulator Pistons, filter, both Shift Solenoids (Rostra Precision Controls), Manifold Pressure switch (AC Delco),Booster Sleeve and Valve even did the replacement Sonnax TCC regulator valve assembly. Here's kind of a high level summary of what was replaced as well:
So here's the problem, after I took it for it's first test drive it would not shift out of 1st or even shift at all to another gear, the rpms seemed to stay around 2k. So I'm guessing I'm in limp mode or at least what I"m thinking is first gear but now I'm reading it appears I may be in Limp mode. Currently there MIL light is not on or any codes cannot be found. Now I keep reading most readers are not going to pick up Trans codes so here's what I've tried so far to diagnosis what might be happening:
Thanks again and look forward to being a member of the forum. |
Originally Posted by SATEXCHEVY
(Post 20081472)
Go to LT1swap.com and look at some wiring diagrams and fuse locations.. Cut the wire off and add a 12 volt wire straight to the transmission to test it. |
And the winner is??? Okay, so if they ever post my other posts, after all the research, what I did was finally took the pink wire that is not connected to the connector on the trans but was coming from the truck harness and with the key on it has 12.4 Volts and with engine on had 14.1. Now this was not reconnected back to the harness so when I did reconnected it back to the harness it had almost no voltage or was all over the place in terms of readings. So I'm going to local Trans shop here and they have my jobber filled out and Friday I'll pick it up and and start the process of re-wiring the new one in. Man this is going to be a pain under the truck. :bang: |
Originally Posted by SATEXCHEVY
(Post 20081955)
. So I'm going to local Trans shop here and they have my jobber filled out and Friday I'll pick it up and and start the process of re-wiring the new one in. Man this is going to be a pain under the truck. :bang: A wire that won't hold voltage is damaged. It can have one strand left and read 14 volts but it won't carry the amperage. |
so the trans store where I get parts , when I order them they call it a Jobber, so my replacement external connector will be available for pickup and install Friday. The trans is still on the car so I'll be doing it from under the truck which is doable and will be fun.. |
Replaced External wiring harness Yesterday, I replaced the external wiring harness with a new one took it for a drive and it's still not shifting. Verified 12V at Pin E. Currently the CIL light is off but my ABS light on for some reason. So I've ordered an autel diaglink so I can pull the trans codes. Is there anything else I can do test wise to see what's going on with the transmission? |
It's running Got it running |
Are you going to share what you did to fix it? |
Come on don't leave us hanging! What fixed it? Sure would be nice if folks would post the fix , after all they are coming and asking for help to fix their junk :poke: |
@SATEXCHEVY reply what fixed it |
OP only joined for help, got help and now he's gone. |
My Apologies, Life kind of derailed me a bit. This is the excel file I used to mark what wires went form the old to the new harness Everyone, I'm very sorry for not getting back to you on the fix, life kind of derailed me for a little bit. But here goes. First I had to verify that 12 volts was present.
Once again I'm very sorry for not getting back sooner but if I can supply any clarification or answer questions please post and I will get back asap. Thank you guys again for all your help and support. https://cimg6.ibsrv.net/gimg/ls1tech...ac6b983a13.jpg Connection on the right side the rubber grommet was to large and did not allow for proper connection https://cimg4.ibsrv.net/gimg/ls1tech...305fba2020.jpg Cross over connector that sits on top of the transmission https://cimg9.ibsrv.net/gimg/ls1tech...6c78b7d9b3.jpg the blue rubber grommet would not allow for proper seating of connector to allow for continuity https://cimg1.ibsrv.net/gimg/ls1tech...6a4fb7237d.jpg verified with both key on and running I was getting a solid 12V on the pink wire https://cimg5.ibsrv.net/gimg/ls1tech...b083b30f22.jpg |
Thank you for posting the solution to your problem. Very nice write up too. |
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