How do I get my 4L80E out of limp mode?
The ECM can also pose a problem that can result in the limp mode in the transmission. A quick fix to this problem is to restart the engine. Sometimes the ECM just needs a reboot and other times it may need replacing. Use a OBD2 scanner to see what could be the issue.
Does a 4L80E have a lockup torque converter?
Despite having similar parts and the same strength reputably known for the TH400, the 4L80E transmission takes it one step further to feature a lockup torque converter, overdrive gear, and advanced electronic controls. …
Can you manually shift a 4L80E?
However, the 4L80E can be easily converted to a manually shifted valvebody, which eliminates the need for the computer and much of the electronics and wiring. This conversion turns the 4L80E into a great heavy-duty analog overdrive transmission that can be easily swapped into almost any high-horsepower 4×4.
How do I know if my truck is in limp mode?
The first thing you’ll notice when limp mode starts is that the check engine light is on. If the car is misfiring, it may shake, and the check engine light might flash. If there’s a transmission issue, you’ll likely be locked into one middle gear, so the car will feel very sluggish when accelerating from a stop.
How much horsepower can a stock 4L80E handle?
How much power can the 4L80E handle? A totally stock unit or rebuild will typically live well with up to 450 flywheel HP/TQ.
Can you swap transmission from 4L60E to 4L80E?
Swapping a 4l60e transmission to a 4l80e transmission is not an easy job, but it’s totally do-able if you are willing to spend some time and money. Here are the things you have to consider: Because of the larger size of the 4L80e transmission, you may have to modify the transmission on the car that you are going to swap it to.
Can you put a 4L60E in a half ton Suburban?
I know they put 4L60E’s in half ton suburbans. According to my research, the look of the trans, and the shops ive taken it to, its a 4L80E, unless of course these trans shops are as shifty as they look. Also, It just plain doesnt work.
What to do if your 4L80E is stuck in 2 from 3?
P-R-N-D work, upshifts mostly work, no downshift into 1 from 2 or to 2 from 3, “stuck” in a certain gear: Pull out the wallet and grease pan. You have to replace the solenoids that control the 1-2 and 2-3 shifts, the “A” and “B” solenoids respectively (the 3-OD shift is not controlled via a solenoid…more on that later).
Why is the shifting valve on my 4L80 not working?
The fluid is blocked at the screen and cannot pass through the screen when the shifting solenoid is engaged. When the electricity is shut off at the computer then the check ball is allowed to back off. When this happens then the shifting valve returns. No electricity sent means no gear.