Broken intermediate snap ring 4L80E
The hole you see is stock and is there to drain the clutch pack area of the drum. You need to put a hole BELOW the piston.
Shown here:


We go a little bigger than .030" and it's not a big deal to put the HD springs on the direct drum in the 4L80E.
I'm starting to wonder if since im in here should i replace my clutches and steels with the Borg Warner high energys. Can someone hook me up with a kit that has, at minimum, the forward, intermediate and direct clutches and steels? This service manual is a little vague on what my clearances should be and how I should check them.
I might even consider a 300M input shaft. I'm thinking with the pressure mods, clutches and input shaft my trans "should" be able to handle my setup with slicks. What do you think?
Last edited by JDMC5; Jun 18, 2014 at 09:32 PM.
Clutch pack clearance rule of thumb is typically .010" per friction. You're pretty safe to use that on all the clutch packs on a 4L80E.
We sell parts/kits as well as complete transmissions. I narrowed the scope of the kits we sell to basically a "complete" kit to build a trans equivalent to our Stage 2. Call Justin at the shop and he can put together a custom kit if needed and handle any billet shafts or other upgraded components.
By .010" per friction, it means that if you have 6 total frictions in the direct drum, you're looking for about .060" total clearance.
We also offer rebuild kits and billet parts, although I can say that out of any other shop out there that offers transmission rebuild kits, Jake's kits are the only other ones that I personally would have no problem using without changing any parts of the order to something different to suit my preferences.
By .010" per friction, it means that if you have 6 total frictions in the direct drum, you're looking for about .060" total clearance.
We also offer rebuild kits and billet parts, although I can say that out of any other shop out there that offers transmission rebuild kits, Jake's kits are the only other ones that I personally would have no problem using without changing any parts of the order to something different to suit my preferences.
That said if it comes down to it I would rather it be a little bit tighter than looser. I would go for more than .065" or less than .055" though. The forwards can be a bit tighter than the directs since they're engaged through every forward gear, not as big of a deal there.
He also told me it was out of a 97-99 6.5 diesel cube van. I ran the numbers and found out it was from a 99 5.7 liter van. Now whether or not it was taken from one and later transplanted into a diesel van or the guy was full if it who knows.
Moral of the story. Don't take someone's word on what they have unless it's a built trans with receipts or from a reliable source. Pull the pan at the very least and only pay core prices unless they can prove it works.
The Best V8 Stories One Small Block at Time
He also told me it was out of a 97-99 6.5 diesel cube van. I ran the numbers and found out it was from a 99 5.7 liter van. Now whether or not it was taken from one and later transplanted into a diesel van or the guy was full if it who knows.
Moral of the story. Don't take someone's word on what they have unless it's a built trans with receipts or from a reliable source. Pull the pan at the very least and only pay core prices unless they can prove it works.
NTC may no longer be active here, but this is why forums such as LS1tech are awesome.
All of your problems are very very simple fixes that I can help you solve. I'll post up for future reference again for anyone who may need to read this now or in the future (maybe a random Google search a year or two+ from now). When I tell you this you're going to kick yourself at how easy this is.
You were trying to put in the assembly all wrong...
Here's how you identify the snap rings you're going to be screwing with.
The bottom-most snap ring is often referred to as the case saver. It goes on the bottom most area possible where the case lugs are, right above the low/reverse band. This is a TH400 case and not my picture (except for the crudely done MS Paint additions, that was me) but it's the same as an 80E. Look at where the red arrow is pointing. That's the area you want to put the first ring, right there on the bottom lip. See the blue? Notice the gap in between the (poorly drawn) "lines"? That's where the case saver ring gap should be.
FYI: The case saver snap ring is identified by the fact that it's extremely thin and has pointy ends, not flat tipped. If you took out all 3 of the ones that are installed in the case itself, it's the thinnest one of the three.



