What do you need to know about GM 4L80E transmission?
Because the 4L80 transmissions are sometimes used in conversion applications with earlier, non-PCM controlled engines, GM and aftermarket control modules are required and used to control the operation of the transmission in these scenarios. The 4L80E transmission may feature two speed sensors, one for turbine input speed and one for output speed.
When did the GMC 4L85 transmission come out?
The 4L85 transmission was introduced in 2002. Some of the differences included a 5-pinion output gearset and 5-pinion reaction gearset. Though not a transmission development change, in 2006 GM specified a new transmission fluid formulation and required its use (for warranty) in the 4L80 series.
Is the GM 700R4 a heavy duty transmission?
The 700R4 was a pretty tough transmission, but not quite in the class of the TH400. GM needed a heavy-duty automatic overdrive. GM used as many TH400 parts and designs as possible in the 4L80E, but the added overdrive gear would require an extra gearset and slightly longer (~1-1/2″) case.
What kind of case does a GM 4L80E have?
Like the other GM automatics, the 4L80E featured a die-cast aluminum case. Unlike the later 4L60E transmission, the 4L80E did not feature a removable bellhousing, but an integrated bellhousing with only the Chevrolet 90 degree engine bolt pattern being available.
When did the Chevy 4L80E transmission come out?
Unlike the later 4L60E transmission, the 4L80E did not feature a removable bellhousing, but an integrated bellhousing with only the Chevrolet 90 degree engine bolt pattern being available. In 1991 the 4L80E was rolled out in GM trucks, including the Sierra, Silverado, Suburban, etc. as well as the Hummer H1.
Are there any transmission problems with a 454SS?
As such, most of the 1991-1992 454SS trucks came with 4L80E transmissions that had faulty parts from the factory. Most of the problems are electronic in nature and are relatively easy, but expensive, to fix. This article deals with fixing your factory 4L80E to make it as durable and reliable as it should have come from the factory.
What kind of transmission does a LMC truck have?
“B” Fits models with production option M30, 4L60E transmission. “B” Fits models with production option M30, 4L60E transmission. “B” Fits models with production option M30, 4L60E transmission. “C” Fits 5.0L models with 140 amp alternator.
The 700R4 was a pretty tough transmission, but not quite in the class of the TH400. GM needed a heavy-duty automatic overdrive. GM used as many TH400 parts and designs as possible in the 4L80E, but the added overdrive gear would require an extra gearset and slightly longer (~1-1/2″) case.
What kind of transbrake does a 4L80E use?
It is a very quick acting transbrake. It works very well in full manual configuration. It has some special tuning considerations for use with a controller in an automatic shift situation. Our D3 transbrake allows for transbrake operation in any forward gear range. It requires transbrake activation for reverse.
How much horsepower does a 4L80E Stage 2 have?
Stage 2 – Warranted 750 HP The Street/Strip (Stage 2) 4L80E includes all new friction materials, steels, bands, rollerized forward hub, rollerized output shaft thrust, heavy duty intermediate snap ring, 6 clutch direct pack, Hi-Energy carbon clutches in select locations, hydraulic modifications for much increased power capacity and firmer shifting.
What is the towing capacity of a GM 4L80E?
The case is die cast aluminum. The 4L80E was designed for vehicles up to 8000 lbs. GVWR and with engines up to 440 ft. lbs. of torque. The 4L85 was designed for vehicles up to 16,500 lbs. GVWR and with engines up to 460 ft. lbs. of torque and towing capacity was up-rated to 22,000 LBS.
What kind of controller does a GM 4L80E use?
Automatic Transmission Controller, FAST EZ-TCU 2.0, GM 4L60E, E4L65E, 4L70E, 4L80E, Chevy, Lap Top Compatible, Kit Automatic Transmission Controllers, Controller, Harness, Software, Chevrolet, 4L80E/4L85E, Kit
What kind of transbrake do I need for a GM 4L80E?
4L80E D321 AUTOSHIFT TRANSBRAKE PART # 4L8VB/ASTB This product is for competition usage only. This product should be installed by a professional transmission mechanic who is fluent with servicing the GM4L80E transmission.
Stage 2 – Warranted 750 HP The Street/Strip (Stage 2) 4L80E includes all new friction materials, steels, bands, rollerized forward hub, rollerized output shaft thrust, heavy duty intermediate snap ring, 6 clutch direct pack, Hi-Energy carbon clutches in select locations, hydraulic modifications for much increased power capacity and firmer shifting.
What kind of valve body does the 4L80E have?
We have established ourselves in the industry with our exclusive innovative 4L80E valve body designs whether we use our in house recalibration kit, or one of our transbrakes, you are getting what no other company in the industry has.
What causes a bad clutch on a 4L80E?
This is achieved by placing a clutch in the torque converter that locks out the hydraulic torque multiplication benefits. This improves fuel economy and reduces emissions. This can be caused by a bad vehicle speed sensor, throttle position sensor, or cruise control wiring.
What kind of transmission does a 4L80E have?
The 4L80E Transmission is a fully computer controlled transmission that comes bolted to the higher horsepower and torque trucks.
How does the clutch work on a 4L80?
It is this clutch that provides the mechanical coupling from the engine to the transmission. The Computer commands this clutch through the torque converter solenoid. The TCC solenoid actuates pilot pressure and sends it to the pump. The pump (in short) puts the pressure on this plate that some call a piston.
What’s the problem with the 4L80-E no overdrive?
The most common problem facing the 4L80-E NO OVERDRIVE and how to deal with it. Not open for further replies. If the problem is electrical then chances are you can troubleshoot the problem yourself. The torque converter has a torque converter clutch. It is this clutch that provides the mechanical coupling from the engine to the transmission.
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.
What kind of transmission does a 1994 Chevy Silverado have?
I have a 1990 GMC 1500 4×4 z71 with 5.7 and auto/ overdrive transmission that is shifting hard. Revs to high from 25mph- until it shifts at 35mph. New fluid/ filter and it is full. After that it drive … read more i have a 1994 chevy z71, and it won’t go into reverse.
What kind of transmission does a 1988 Chevy Silverado have?
I have a 1988 Silverado 1500 4×4 with a700R4 transmission. Is there a later year type transmission that I can install in it. … read more Vocational, Technical or Tra…
What kind of transmission harness does GMC 4L80E use?
4L80E Transmission: Pre 4L80E transmissions use a different internal wiring harness and pass-through connector. This early harness has a problem with leaking fluid at the pass-through connector. GM recommends upgrading to the newer connector and wiring harness. Because of this, we do not provide a wiring harness for it.
What kind of torque converter does GM 4L80 have?
The torque converter is a fluid turbine drive and like those on its predecessor transmissions; the TH350C, 700R4, and 4L60, the 4L80 features a lock-up pressure plate for direct mechanically coupled driving from the engine crank. The 4L80 features a 310 mm torque converter. As to length, this transmission is 26-1/4″ long.
What is the RPO code for a GM 4L80 transmission?
The 4L80 nomenclature denotes that the transmission is a 4-Speed, Longitudinally mounted, and for 8000 lbs. vehicle weights. It’s RPO code is “MT1” and has been domestically manufactured in GM’s Ypsilanti and Willow Run plants.
Because the 4L80 transmissions are sometimes used in conversion applications with earlier, non-PCM controlled engines, GM and aftermarket control modules are required and used to control the operation of the transmission in these scenarios. The 4L80E transmission may feature two speed sensors, one for turbine input speed and one for output speed.
The 4L85 transmission was introduced in 2002. Some of the differences included a 5-pinion output gearset and 5-pinion reaction gearset. Though not a transmission development change, in 2006 GM specified a new transmission fluid formulation and required its use (for warranty) in the 4L80 series.
Like the other GM automatics, the 4L80E featured a die-cast aluminum case. Unlike the later 4L60E transmission, the 4L80E did not feature a removable bellhousing, but an integrated bellhousing with only the Chevrolet 90 degree engine bolt pattern being available.
The case is die cast aluminum. The 4L80E was designed for vehicles up to 8000 lbs. GVWR and with engines up to 440 ft. lbs. of torque. The 4L85 was designed for vehicles up to 16,500 lbs. GVWR and with engines up to 460 ft. lbs. of torque and towing capacity was up-rated to 22,000 LBS.