LS1TECH - Camaro and Firebird Forum Discussion - Automatic Transmission https://ls1tech.com/forums/ 2-Speed thru 10-Speed GM Autos | Converters | Shift Kits en Wed, 29 Apr 2026 10:10:23 GMT vBulletin 60 https://ls1tech.com/forums/images/misc/rss.jpg LS1TECH - Camaro and Firebird Forum Discussion - Automatic Transmission https://ls1tech.com/forums/ Help with Rollerized forward hub clearance to direct drum. https://ls1tech.com/forums/automatic-transmission/1984669-help-rollerized-forward-hub-clearance-direct-drum.html Sat, 25 Apr 2026 03:59:35 GMT Hello everybody,

Benn rebuilding my first '99 4l80e and this site and Youtube has been my guide line and gold mine on how to rebuild it myself, but I have a question about the slop between the forward hub and direct drum. I have a rollerized forward hub that came with my stage 2 kit from Jakes.
When installing it and measuring the clearance between the direct drum and the forward hub I have 0 play, I am reading that this is normal when using a bearing instead of the bronze washer and other info I find is that it should have play.

Can somebody tell me what it should be and where do I have to look if I need play ?

I found a video of somebody having the same problem but he doesn't know anymore what he did...

https://www.facebook.com/groups/4089...5719835820873/

Thanks for any help on this... ]]> Automatic Transmission stingraymax https://ls1tech.com/forums/automatic-transmission/1984669-help-rollerized-forward-hub-clearance-direct-drum.html 4l80e foward drum clearance issue https://ls1tech.com/forums/automatic-transmission/1984661-4l80e-foward-drum-clearance-issue.html Fri, 24 Apr 2026 10:41:27 GMT So currently rebuilding my first 4l80e. Have a performance rebuild kit with all the billet goodies and what not. My current predicament is the forward clutch stack. This transmission is a 95 year... So currently rebuilding my first 4l80e. Have a performance rebuild kit with all the billet goodies and what not. My current predicament is the forward clutch stack. This transmission is a 95 year model and came with the aluminum piston in the hub and the coned style cushion plate. At first I replaced the aluminum piston with a bonded style and this is when the problem first appeared. With the bonded piston the clutch stack was OVER the ledge. After some thinking I went back to the aluminum piston to see if it was shorter and it put me to about even with the ledge with the new frictions and steels. For a test I put the old frictions and steels in and it measured 0.035” below which would be within spec but I assume this is from friction wear as all the steels are 0.77” new and old. What is the best call here? I’ve heard some people are wary of the steels that are thinner than 0.77” due to heat and considering this is going to be in a performance build with a brake I would assume this might be something to take in to consideration? I’ve also heard of getting rid of the coned plate and replacing it with a th400 waveplate which would go directly against a friction and therefore ridding yourself of one steel and adding the difference back in the thicker steels? Thanks in advance and please bear with me as I’m learning lol ]]> Automatic Transmission Sleeper 71 lemans https://ls1tech.com/forums/automatic-transmission/1984661-4l80e-foward-drum-clearance-issue.html Built early 4l80e. Convert to new internal harness or repin? https://ls1tech.com/forums/automatic-transmission/1984638-built-early-4l80e-convert-new-internal-harness-repin.html Tue, 21 Apr 2026 15:37:41 GMT Hey all, I have an early 4l80 that I've had sitting around for quite a while that was never intended to go into my 2000 trans am but I am now considering swapping it in as my TH400 is just not street friendly and the goals with the car have changed over the years. The 4l80 has a basic shift kit and some stuff from Jakes Performance. It should be good for some decent power and give me an overdrive. Being that is an early year what all should I upgrade to use it in my car with the factory PCM? Also, it has a bolt on yoke which I think I can just weld up the bolt hole and use it as a slip. Let me know your thoughts. ]]> Automatic Transmission nossty1 https://ls1tech.com/forums/automatic-transmission/1984638-built-early-4l80e-convert-new-internal-harness-repin.html Stalled C5? https://ls1tech.com/forums/automatic-transmission/1984542-stalled-c5.html Fri, 10 Apr 2026 00:19:33 GMT Ok guys picked up a 2000 C5 with quite a few unknown mods, but its for sure heads/cam, has a 3.15 rear in it.. as I was cruising it i was trying to determine if it has a small stall or if its stock... Ok guys picked up a 2000 C5 with quite a few unknown mods, but its for sure heads/cam, has a 3.15 rear in it.. as I was cruising it i was trying to determine if it has a small stall or if its stock feel for a C5, Ive only had one other one and it was an M6.

What do you guys say by the video? Stall or no stall? I was just cruising and would dip into the pedal maybe 1/4-1/2 throttle to flash it. It wasnt a shift.
Attached Files
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Video.mov (900.9 KB)
]]> Automatic Transmission LS1Silverado05 https://ls1tech.com/forums/automatic-transmission/1984542-stalled-c5.html