Lockup reduces slippage in the converter increasing fuel economy. Use a special electric cleaning fluid and be sure to dry completely. Regards, Tom Loyal P'up Posts: 149 Joined: Sun Jul 18, 2004 8:03 pm Has thanked: 0 time Have thanks: times Thanks Serranot I'm having the same exact problems on my 99 Trooper tranny. It is one of the most common as well. Additionally, there is a modification to be made to the auxiliary valve body gasket that has to be made in certain transmissions. The longest made it to just under 10 Months.
Categories Tags , , Post navigation. It's been well over a year since I fixed it, but if I remember right to remove it there was a small metal shield that pops off. If a decision has to be made to replace the transmission, I highly recommend you consider a as your first choice. A common problem on many General Motors cars is the Torque Converter Clutch fails to release and causes the car to stall when it comes to a stop. Loud bang, grinding sound, loss of all gears, and a binding driveshaft: Snapped output shaft.
When in limp mode, you usually can only go into one forward gear. Less force would be obtained if the turbine deflected the fluid instead of reversing it. I researched this issue on the boards already, but there are conflicting replies. The problem is compounded when the car is driven in overdrive. With its licensing to Isuzu, General Motors provided support the Rodeo and Trooper for a number of years before terminating the 4L30E. The impact of the moving fluid on the turbine vanes exerts a force that tends to turn the turbine in the same direction as the impeller rotation.
To check for pump failure, check fluid level with the engine off, then start the engine and recheck fluid level. That is how the transmission was designed to work, but when it is time to perform the maintenance make sure you do something about it. It was indeed the range sensor. Most likely a cracked input housing, or cracked forward piston means forward clutches are fused together. The high torque capacity of the 4L30E makes it a great replacement for a number of different sedan and luxury automobiles.
This leads to a sluggish feeling when initially accelerating from a standing stop, and high engine revolutions when traveling faster than around 30 mph. Seal restorer may fix last problem, but probably remove and rebuild needed. P-R-N-D work, upshifts are erratic and occur at random engine speeds, will not upshift from first gear no upshifts at all : This problem seems very serious in nature but in fact this is something very simple to fix. All gears seems to work. I've had a problem with hard shifting on-and-off for over a year.
You can tell this is happening to you when you shift and the gear indicator lights in the dash flash everywhere. Remember to fill the converter with as much fluid as you can before you install it. You should have four four gears until the transmission senses that the issue has returned. Also, if the accumulator housing walls are scored, the housing must be replaced. Find sources: — · · · · April 2019 4L30-E Overview Manufacturer Production 1991—2004 Body and chassis 4-speed Chronology Predecessor Successor The 4L30-E was an developed and produced by. If tester lights continue with Regular Method. Transmission must be removed and rebuilt, sooner rather than later.
I think this is a fix it myself task. Flush the transmission cooler and cooler lines. Refilling the transmission can be a challenge. There may be a leak in the reverse circuit, possibly caused by a blown valve body gasket or the valve body might be warped. Are you looking for 4L30E transmission troubleshooting help, 4L30E rebuilding tips, 4L30E technical service bulletins, 4L30E diagnostics or technical information? These are located on the valve body and are as easy to get to as the shift solenoids-but much more costly.
Amigo2K was recently having tranny troubles and it turned out being a bad intake manifold gasket! This saves the hassle of shopping at a mail order resource. If either of these fail they may cause this problem. Instructions for doing the job are contained in this thread. It is possible to remedy a fluid problem by removing the checkball from its cage in the case in the rear of the transmission may help must remove valve body , or adding a high-viscosity additive or other seal restorer product. The first to second gear shift is late and harsh. Takes a long time to shift into reverse.
We Show You How To Fix Them! I am running into somewhat similar problems, but mine seem a little more severe. Transmission does not shift automatically, only manually. Has anyone had this problem? From bells to valve bodies, added solenoids, changes in pump and convertors. At first the noise occurred when the truck had been sitting for a bit, and was within the first mile or so. If it does, clean it them with a piece of emery cloth. And remember, the companies that re-manufacture transmissions are very easy to contact.