Final drive ratios include 3. After startup, I was very relieved to find the entire transmission working properly. My transmission had no metal in the pan after the shell broke. But everyday with post like you posted I learn more Is this the kit you installed and is that price in the ball park of what you paid for it? When I got home I went to move the truck over to the other garage and there was no reverse. It only took the Doctor a day to rebuild this transmission, as he has the right parts and experience to rebuild this with his eyes closed. Although after talking to my wife more, she said that she noticed the truck was hesitating occasionally for the past couple weeks.
If the control module senses a speed reference greater than 8mph during the shift into reverse, it has the ability to prevent the shift from happening. That pin can wear down and cause reverse issues. Remember the simple rules in diagnosis of separating the three areas of the transmissions Hydraulic, Electric and Mechanical , as this does save that valuable time. 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. Hard to say what was done went it was rebuilt, everyone has their own ideas and ways of rebuilding. Last, but not least, check the booster valve. The difference between dismantlers and the local yard all come down to how vehicles are ingested and the organization structure in place.
Line Pressure Test Results: Cold: Idle 1500rpm Drive: 60psi 210psi Reverse: 68psi 270psi Hot: Idle 1500rpm Drive: 60psi 210psi Reverse: 62psi 120psi This tells me that I can also eliminate the Pressure Control Solenoid as a possible cause since it functions properly in Drive. Never fails, the customer needed the vehicle last week and is not letting up on the pressure to get the vehicle delivered. Is the problem electrical or mechanical? Start the vehicle in Neutral with the parking brake applied this helps in preventing the mess and quickly shift to reverse to verify whether the band is holding with engine load. Once you have the tool, there are two ways to do the test in the vehicle. Replacing those bushings is prolly the biggest pain in the ass in this whole process. If no debris is found in the pan, I would turn my attention to the valve body.
I searched the internet for days so far and this website popped up. The management works very hard to make sure the community is running the best software, best designs, and all the other bells and whistles. This will keep the band applied, greatly reducing the stress cycles. Chris patterson 2-14-08 Same problem with my 91 3500 anyone know whats going on with this problem? Do I need to make sure and tell my repair guy that or is he going to be aware of this? But, it can work either way. Good Luck and let us know how it goes. I have seen several problems with the 4L60e transmission series. Yes, reverse band failure is 1 reason for no reverse.
First, make up a special tool that will allow you to manually lock the servo down. Trouble Shooting a Faulty Shift Solenoid In Your 4L80E Automatic Transmission Posted by on Wednesday, December 4th, 2013 The 4L80E is a four speed automatic transmission designed and built by General Motors. There are over 20 different variations of the 4L80E so we have over 20 different part numbers! The crew at Just Chevy Trucks referred us to. Then at one time she said she heard a loud clunk noise, but continued to work with the truck still not shifting right. I will continue to post my progress. From what I reading if that rod is not right length then reverse band slips or the reverse band drags.
I heard on other places it could be a broken reverse servo drum. And dont forget on every tranny replacement that all lines and coolers should be flushed out to keep from contaminated fluid from reaching the new tranny. The gearing to move such a heavy load is a 2. Call us and find out more about how to choose the right transmission for your needs. Here is one youtube video that talks about having the wrong clearance on that servo pin. The magnet portion of the solenoid is made up of a long coil of single strand wire. It could be something else, but not nearly as likely as one of the reasons listed above.
Install the special test tool that allows the band to be mechanically applied. But its like stage 1 is stock or a little better. Below we will cover the most common problems that cause reverse to fail. The servo is definitely a possibility. These transmissions can be found behind 4. Provide you with the finest rebuilt transmission on the market.
While Backing up into driveway, reverse let go. Categories , Tags , , Post navigation. We are dedicated to giving you the technical support you need, when you need it! Thanks ken h 8-10-06 Same problem as ken joel duane how about some Duane 8-9-06 Hello; I have an 95 chevy with 4l80e also with good forward gears, but no reverse. The no engine braking in manual 1st gear is a great clue that may lead us to the band, but there are still other factors to look at. Pressure in reverse should not be losing 150psi when hot. The other issue concerns using the correct and effective updates available now to correct why the piston cracks in the first place.
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. I not sure when the last owner had the tranny serviced? They are electronically controlled, unless modified, and the housing itself is die-cast aluminum. After reseating the converter several more times and installing and removing the trans as many times, I decided something must be wrong inside the pump. Transmission plug is saturated with transmission fluid inside and out. I have done the engine brakeing test and that seem to be good from what I can tell I have to double check that as soon as some one can pull me out of the driveway lol. There is always the possibility that a seal was cut on the forward piston during installation.