Got gm 4l80e transmission problems? Let's figure them out together!

Maintenance and Repairs
21

A failing solenoid is definitely a potential culprit. Running a diagnostic with an OBD-II scanner could reveal specific error codes.

22

I had a similar issue. Swapped out the solenoid and it made a huge difference! Well worth checking out.

23

That’s great to hear! I guess that’s my next step if the codes are pointing in that direction.

24

Don’t forget to inspect the wiring and connectors as well! Sometimes it’s a simple bad connection causing the problem.

25

Can errors from the transmission control module also lead to shifts being off? I’m curious if I should look into that.

26

Absolutely! The TCM issues can significantly affect shifting. It’s definitely worth diagnosing it.

27

Has anyone had experience recalibrating their TCM? Is it complicated?

28

Recalibrating can be tricky without the right tools, but it’s absolutely doable! Just take your time and follow the manual.

29

I’ve heard some rumors about 4L80E transmissions being unreliable after certain years. Anyone else heard this?

30

I think it depends on maintenance history more than age. Regular service makes a huge difference!

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31

Absolutely! Regular maintenance is key to longevity. It’s not the transmission itself, but how it’s treated that matters!

32

Bringing some humor: They say my 4L80E is like an old dog; it just needs gentle care and treats every now and then!

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33

Haha, that’s a great analogy! Let’s just hope it doesn’t need too many visits to the vet!

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34

Has anyone here had issues with slipping in the 4L80E? I’ve noticed mine hesitates between shifts. Any ideas?

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35

I had a similar problem! It turned out to be low fluid levels. Always check your fluid first; that’s usually a great starting point.

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36

I totally agree with you, browntyler. Regular maintenance is key! Clean the filter and make sure to change the fluid every 30k miles if you can.

37

What kind of fluid do you recommend? I’ve heard some brands work better than others for the 4L80E.

38

I switched to a synthetic blend and it made a noticeable difference. Just make sure to avoid anything that claims to be ‘universal’.

39

I’ve heard a rumor that the 4L80E is a bit prone to overheating. Anyone experienced that? Any solutions?

40

Definitely! Adding a cooler can save your transmission from overheating. It helped my truck run way cooler during long hauls.