See all 4 photos. Face it, this is the golden era for horsepower. But that added power puts even more pressure on the rest of the driveline, and no more so than on the transmission.
The good news for GM fans is that when it comes to automatic transmissions, there are multiple options. The trans we think has been overlooked is the 4L80E Transmission. This cryptic description is GM's way of saying this is an automatic transmission with four forward speeds designed for longitudinal i. RWD use. The "80" references higher torque capacity compared with a 60, for examplewhile the "E" defines this as an electronically controlled transmission.
We did some research on some of the more important aspects of performance uses for this transmission. You can think of this trans as basically a TH with a 25 percent overdrive tacked on.
The 4L80E transmission was mostly used in and 1-ton trucks and larger SUV applications beginning in The "E" means that it must use an electronic ECU for control, as it will not function without it. The trans has experienced multiple minor upgrades over the years, with the newer boxes being a bit more attractive, but all the versions can be made to work well in a performance application.
The addition of electronic control and overdrive adds roughly 50 pounds and a slight amount of width over a TH, but for the most part, any floorpan that can accommodate a TH can also fit a 4L80E. Also, the 4L80E transmission is typically about 4 inches longer than a TH depending on the length of the extension housingbut the trans mount is located roughly inches rearward.
Most of the concerns about rL80E transmission revolve around the need for electronic control. Car Craft did an extensive review of five aftermarket controllers in the Mar. Be aware that if your car is carburetor-equipped, an aftermarket conversion will also require a throttle-position sensor TPS adapter to the carburetor throttle linkage.
Holley and most of the companies that sell the controllers also offer a TPS adapter. So while the 4L80E is affordable, there is some expense involved with converting it into an earlier chassis. But isn't half the battle knowing how deep the water is before you dive in headfirst?How to wire your 4L80e to full manual DIY
The advantage here is a trans that is even stronger than the original TH and offers an excellent 25 percent overdrive. Jeff Smith writer. Gear Ratio First 2. Share on Facebook Share on Twitter.Pull your transmission connector, pull the covers and the pinlock out the front of the connector. Remove the wire from slot S, Then move the wire from slot U and place it into slot S.
These will be your new ISS wires. Connect these to an ISS sensor pigtail, Crimp, solder im not gonna tell you how to live your life. Polarity doesnt matter its a pulsed signal.
You will have one extra wire just tuck it up in the loom and tape it up. Now unplug your TCM, remove the locks for the pins, there is one that slides out the side and a backing plate.
Make sure you move the seat from where the customer has it positioned. Make sure its really far from where they had it. Now make sure you put the steering wheel tilt all the way up like hes going to be driving a peterbuilt.
Ok now that is done break out your hptuners mpvi. Get on the hptuners website and search the repository for a chevy express van. Now youre going to have to license this file to use it, good thing is its only once and can use it on future swaps. So fire up hptuners and open that file, you will need 3. Connect to vehicle and hit the write button, put do not write for engine and select write entire for trans controller.
After that is done close the express van file, Hit the read button and save that file as your new 4l80e file for your vehicle.
Search this site. Now get a pick tool and start pulling pins. Should only be one on there for the trans segment of the swap. You did it. Report abuse. Google Sites.I also recently turned on the torque converter clutch to activate in overdrive. Everything is working perfectly and shifts just like it should.
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This is for those guys who are running MegaSquirt, carb or something other than a factory computer for their engines. I Dale Follett can write up how to make it work on a 4L60e too if theirs enough interest into it.
This could easily be done by swapping around the entire engine computer and harness back to a factory style PCM, BUT my car is wired up with MegaSquirt 2 and I like its features. Does not matter if it was a 4L60E or 4L80E BUT having a computer that ran your transmission from the factory from the junkyard is easier. All your normal wiring crap.Deed name change form
Soldering Iron, wire strippers, electrical tape or if you want to be fancy heat shrink, wire, etc. The rest of the PCM's inputs come from the transmission itself. Biggest thing here is PCM selection.
Example, my firebird setup is running a 4. If your running a older style small block chevy you would need a PCM out of a chevy express van and setup the engine for the same crankshaft position sensor and wheel to get the correct RPM input into the PCM. The next thing is TPS. For those of you who are looking into doing this for your carburated setups, you'll need to fabricate a mount onto your carb for a TPS sensor.
Now on how to wire it in. Their are no pre-made wiring harness' for this so you will have to make your own harness. I go by pinout count and connector pin counts to do my wiring harness' because the wiring colors may be different from make and model vehicle your swapping parts around.
The Blue connector is referred to as C1 and the Red connector is referred to as C2. If you want a "Check Transmission Light" or more commonly known as a check engine light for your transmission. This could be wired to the ground side of a small light bulb to notify you the PCM has a code in it for something wrong with transmission function. This needs relayed to work correctly. C1 Blue Connector Pin 33 needs 12vdc key on power until you press on the brake pedal, which then it needs no power or ground applied to that computer pin to let the computer know it needs to release the torque converter clutch.
A bosch single pole double throw relay would work great for this. Ground 85, Wire pin 86 to your 12vdc from your brake switch to your brake light wire. Apply key on 12vdc power to pin 30, then wire C1 Blue Connector Pin 33 to 87a.Freighter bulkhead nms
Your torque converter clutch should release now with the brakes applied. Because the Transmission connector isnt as clearly marked as the PCM connectors are, heres a diagram. It is a nice safety feature, but not required. The tune file in the PCM must be setup for the engine or crankshaft position sensor wheel currently equipped on the engine in order for it to get a proper RPM signal input.
If you run it just as is from a junkyard, It will A: go into anti-theft mode because VATS is still enabled, B: go into transmission limp mode and C: possibly not work at all depending what application you pulled your computer out of. I had to get another tune file with the same OS operating system my PCM has that had a 4L80e transmission originally so I could segment swap the transmission and transmission diagnostics segments over to my tune file. I currently have not found a work around to be able to use this feature.Here are the main parts that you are going to need in order to make your own 4L60E to 4L80E swap kit.
Unfortunately, the adapter is not cheap. Replacing the entire wiring harness is not easy, convenient, or cost-effective. It is far and away easier to swap in the adapter. There are plenty of ways to get the ECM flashed. You can try eBay. If you live in a decent sized metro area, you can probably find someone to do it locally on Craigslist. The advantage of finding a local guy is that if there ends up being any sort of problem they can correct it right there on the spot.
If you are going to be doing any sort of heavy modification to the engine, you may wish to send it to a tuner to have the transmission tables changed in the ECM. There are two considerations when finding someone to re-flash your computer when you are modifying your engine and swapping out your transmission to the 4L80E. If you hook to the wrong one, you may end up with an idle problem. Depending on whether or not your vehicle ever came with a 4L80E is going to have a big impact on how expensive a crossmember is going to be for your 4L60E to 4L80E swap.
4L80E Troubleshooting, Diagnostic Help!
If the vehicle came with the 4L80E you can head over to the nearest parts store, GM dealership, or salvage yard and just pick one up. You can find it over at Jegs or Amazon. One thing to keep in mind when swapping a 4L80E into a vehicle that it has never been in before is transmission tunnel clearance.
Most folks will end up beating the tar out of their classic car trying to wedge this transmission in there. The 4L80E is noticeably bigger and longer than the 4L60E.
If you are swapping into a vehicle that had a 4L80E as a stock option, go ahead and order the dipstick for that vehicle. You can not reuse your flex plate but you will need to get a special torque converter to engage it properly. Alternatively, you can get the flexplate for a 4L80E and use the 4L80E stock torque converter. Again, if the 4L80E was an option on the vehicle that you were thinking about swapping it into, than it would probably be more cost-effective to go to the salvage yard and grab the driveshaft there.
Have they ever flashed the ECM for your exact setup before? If they have, they may have done it on the dyno.
Do they ever come to town for Dyno events? If they do than you can get the mail order tune and wait for them to come to town. Try Speartechthey do great work. Crossmember Depending on whether or not your vehicle ever came with a 4L80E is going to have a big impact on how expensive a crossmember is going to be for your 4L60E to 4L80E swap.
Dipstick If you are swapping into a vehicle that had a 4L80E as a stock option, go ahead and order the dipstick for that vehicle.The 4L80E is a 4-speed with overdriveelectronically controlled transmission, with ratios: Gear Ratio 1 2.Scarpe marrone classiche donna basse churchs online 1jcklft
These are:. This resistor dissipates up to 4 Watts of power at low line pressures maximum PWM percentages. As a result, the resistor can get hot, so mount it on a heat sink ideally a metal block in an area with plenty of air circulation.
GM 4L80E Transmission: A Performance Guide
In conjunction with that resistor, you will need a 1N diode placed between pin C and D on the 4L60E connector the closer to the transmission connector the better.
These two additional components cut the flyback spikes from the solenoid to manageable levels preventing damage to various GPIO board components and potentially cleaning up external signals such as the VSS. When the mode switch is closed, auto mode will be used, regardless of what you do with the shift buttons. If the mode switch is open, pushing either the upshift button or downshift button will put you in manual mode and pushing both OR switching the mode select switch to auto will put you back in auto mode.
If you are looking for a 4L80E harness connector, try a scrap yard, or here: www.Angular timer pipe
The pressure switch manifold PSM is a multiple switch assembly consisting of 5 normally open NO pressure switches. Fluid from various hydraulic control circuits is fed to this the pressure switch manifold which allows the ECU to determine which gear the shift lever is currently shifted into not necessarily the actual gear the transmission is in.
The switch contacts are normally open and close when fluid pressure causes them to. Depending upon the circuit, the switch may provide a ground path when closed. The table below shows a pin that is grounded by the PSM as a "0", while an open circuit shows a 12 volts. Case Connector. It's a 0.
Where is my engine's setup? Is it emission legal? What do the version numbers mean? How can I find my code version? What is 'tuning'? What about automatic transmissions? How can I find out more? Where can I ask questions? Is there a PDF of the manual? How do I purchase? How does it work? Can I do sequential injection? What other hardware is there?The world of transmissions has developed a lot over the last 20 years. One tried and true transmission, the TH, received a slight makeover into the 4L80E.
We wanted to took a closer look at it. The TH was originally introduced to the General Motors platform in the s. The 4L80E came thirty years later in the s. The 4L80E has a max torque rating of lb.
The gearing to move such a heavy load is a 2. These transmissions can be found behind 4. They are electronically controlled, unless modified, and the housing itself is die-cast aluminum. Some Hummers also ran them as well. Mind you, this transmission can also be converted to be a full manual gearbox as well. The transmission is also slightly larger than a TH as the overall length is 32 inches; 1.
Another aspect to note is the transmission cooler lines. Early versions had them side by side, but later versions had one moved further back in the housing. There are a lot of different ways to go about acquiring one of these transmissions. The easiest and most expensive route is to buy a brand new or rebuilt one off the shelf.
These can be purchased through several different companies that normally offer a warranty on them. However, the price can go through the roof for a brand new transmission. Alternatively, you could go on Craigslist and pick up a used one, hoping that it works as great as the seller tells you it does. Use your best judgement in these cases. Another option is to search for a core at the local yard, or even better your local dismantler and spend hours finding one and pulling it out.
This would be a cost effective way of sourcing one, but it would most likely need to be rebuilt. In our search for one, we came across Just Chevy Trucksa place that takes Chevy trucks and dismantles them in Maine.
The difference between dismantlers and the local yard all come down to how vehicles are ingested and the organization structure in place. The remainder of the truck is immediately removed from the property and sent to the local crusher.
After purchasing our core unit, the the question came up—where should we have it rebuilt? The Doctor Is In. Sure it somewhat worked, but if we wanted to do more than drive from one side of the parking lot to another, it would need a full rebuild. Instead of buying a rebuild kit and hoping that we did everything right, we decided to call the Doctor.It shows the components of the circuit as simplified shapes, and the capability and signal contacts along with the devices.
A wiring diagram usually gives opinion nearly the relative outlook and promise of devices and terminals upon the devices, to assist in building or servicing the device. A pictorial diagram would doing more detail of the beast appearance, whereas a wiring diagram uses a more figurative notation to play up interconnections higher than monster appearance. A wiring diagram is often used to troubleshoot problems and to make clear that all the associates have been made and that anything is present.Valiant car
Architectural wiring diagrams be active the approximate locations and interconnections of receptacles, lighting, and remaining electrical services in a building. Interconnecting wire routes may be shown approximately, where particular receptacles or fixtures must be upon a common circuit. Wiring diagrams use adequate symbols for wiring devices, usually every other from those used upon schematic diagrams. The electrical symbols not abandoned action where something is to be installed, but with what type of device is subconscious installed.
For example, a surface ceiling well-ventilated is shown by one symbol, a recessed ceiling blithe has a alternative symbol, and a surface fluorescent well-ventilated has unusual symbol. Each type of switch has a alternating symbol and as a result do the various outlets. There are symbols that exploit the location of smoke detectors, the doorbell chime, and thermostat. A set of wiring diagrams may be required by the electrical inspection authority to agree to relationship of the habitat to the public electrical supply system.
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