Note: There have been many engineering changes in this transmission since its introduction. Replacing those bushings is prolly the biggest pain in the ass in this whole process. I had several people say what do the pros use and I answered that some what. Thatd be the upside down part in the top left of the above picture behind the trans pan. When it lost reverse there was no noise I heard? When in manual first in a 4l80 the low and reverse band is applied to the reaction carrier assembly, helping with holding power. One suggestion, do each assembly at a time.
Also, Jakes will help you and answer questions if you buy their kit. I am going to say the fine metal shavings is normal wear and tear for 156,000 miles. Rated at 1000 Horse Power. This Video I am watching with ever step and excellent video so far has me smiling!!! Glad you pointed that detail out. I will continue to post my progress.
To lose it burns up! I tackled the rebuild process one sub-assembly at a time. Note: There have been many engineering changes in this transmission since its introduction. The last thing I want to do is all this work and money and have a bad case or drum etc. I might just have to order these 2 parts do be able to see new vs. There's some items that I personally would've add to the parts list but since this is for a Transmission Shop down the road this is what I was provided with. Besides some light clutch debris and metal filings in the pan, the only problem I found with the trans was a blown output shaft seal. Will fit all 1991 to 1996 models if 1997 and up reverse servo cover is used.
I must try to find problems to be able to fix it. Theres not many parts to a transmission. It popped up on ebay. So if anyone has information to share with me and the other readers please do. Waa Laa my first clue is I found a small O-ring seal.
I do try to stop before changing gears and the fluid gets changed every fall and the filter every spring well ahead of the scheduled maint interval. And it's not the holding ability or lack of that causes the band to fail, its the shock load placed upon it during apply, which physically breaks the apply anchor off the band. I am at the point where I could start to loose track of what went where. However, the price can go through the roof for a brand new transmission. The stock pressure control was a common failure from 1991 to 1995 I believe. Then stage 2 come with single disk tc, valve body, and upgraded clutches. This pressure problem made the reverse servo not work right because it works off fluid pressure and that servo applies the reverse band and that has to be correct.
The world of transmissions has developed a lot over the last 20 years. The tranny was the origional and had 380,000 kilometers on it and has been a work truck since it left the dealer. After draining the fluid out of the transmission the pan was removed along with the filter. I have a dozen full rebuilds of mostly small blocks under my belt so I can turn a wrench and follow directions. Some of those changes are indicated in this manual and some are not.
My truck is a C2500 long bed standard cab 2 wheel drive with a 5. The shop that did it rebuilds them for the other local shops. Rated at 1000 Horse Power. The remainder of the truck is immediately removed from the property and sent to the local crusher. From what I reading if that rod is not right length then reverse band slips or the reverse band drags. I ran the transmission through each gear with my foot on the brake to get the hydraulic circuits filled with oil. Have a look folks because if I not on the right track speak up please.
I now believe thats why it failed. Cool Thank you for posting what you bought and how it turned out. These transmissions can be found behind 4. I just thought with your comments on the reverse servo I would run that by you???? We see the parts that took for a successful repair. I mounted the trans 4L80e on a friends engine stand and have been going over the manual and learning the parts inside the pan. Doctor Steve likes an upgraded version with O-rings and a progressive spring.