I bought a 2002 freshly built 2wd 4L80e but it does not have a tail shaft housing. Does anyone know what the part number is for the tailshaft housing and if i need anything else in the housing? This is going in a 2008 ecsb along with a new drive shaft.

 

https://www.wittrans.com/SchematicPa...E&LinkCode=770

 

https://www.wittrans.com/Schematic.a...0E&Schematic=4

 

perfect, thanks!

 

Cant say i never done nothing for ya

 

The unit in the picture appears to be a 4x4 unit? If it is you can not just put a 2wd tail on it.

 

Vince, How would I know if its a 4x4 unit, if it is, will all is it just the output shaft that needs to be changed?
I found one of your old post on someone wanting to buy a 80e 4wd and make it 2wd but I'm not savy with transmission terms.

"The 2wd would be best unless you plan on taking the whole trans apart and install a 2wd output shaft. There is a freeze plug in a 4x4 that will need to be removed and then an orifice plug needs to be installed for lube on a 2wd extension housing. "

 

I believe Vince said that because the output shaft doesn't seem to protrude out the rear of the case that much. It could be the angle of the transmission but I am going to have to agree with Vince. I think the post from Vince you posted was a response he gave me.
Anyway, to tell if it is a 4x4 unit, look at the rear speed sensor, if it differs from the front speed sensor it is probably a 4x4. I believe the reaar speed sensor on a 4x4 unit is called a "dummy sensor". Next you can look at the back since the tail/extension housing is removed. Is there a steel plug on the passenger side w/o a hole? if so, that;s a 4x4. 2x4's have a greenish/gray plug with a pinhole for lubricating the rear. Next, the output shaft, if it around 4 inches from transmissioncase to the end it is more than like a 4x4. if it is about 6 1/4" with 5 1/8" splines, it's probably 2wd. However I do believe the bolt on yoke 4l80e's had shorter spline lingth somewhere around 3.5" but the overall output shaft length from transmission case to the end should match the above 6 1/4"

 

I have the transmission in storage and will see when I can take a snapshopt of it. If indeed I need to get the output shaft replaced, is it the slip on yoke shaft that I need?

 

if you are going to use a one piece then you need a slip oke. if you are 2 piece then you will need a bolt on yoke.