4l80e 1000HP build help
11-04-2009, 05:55 AM
#1
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4l80e 1000HP build help Hi there all iam after some help iam rebuilding my 4l80e and require some help what exactly is needed to make it handle 1000HP reliably such as what
-hard parts
-clutches
-soft parts (seals etc)
-and any little tech tips from the trans builders on here (would be huge help)
i already have a full manual transbrake valve body and a full 1997 core with rear lube stripped and cleaned ready to assemble on the stand just a lil stuck
cheers
any help would be of huge appreciation
-hard parts
-clutches
-soft parts (seals etc)
-and any little tech tips from the trans builders on here (would be huge help)
i already have a full manual transbrake valve body and a full 1997 core with rear lube stripped and cleaned ready to assemble on the stand just a lil stuck
cheers
any help would be of huge appreciation
11-06-2009, 09:21 AM
#3
You'll need a 4340 or 300 M input shaft, billet forward hub, Super Drum would be nice but isn't mandatory if you are careful with burnouts.
6 clutch direct setup, rollerize the forward hub, rollerize the rear planet to case location. Rollerizing between the planets is also a nice addition.
Perfect pump build, 200 psi line pressure, new boost valve should always be installed.
4340/300M mainshaft would be nice but isn't mandatory at 1000 HP.
Direct clutches must be dual fed either internally or with the VB.
Tight endplay.
6 clutch direct setup, rollerize the forward hub, rollerize the rear planet to case location. Rollerizing between the planets is also a nice addition.
Perfect pump build, 200 psi line pressure, new boost valve should always be installed.
4340/300M mainshaft would be nice but isn't mandatory at 1000 HP.
Direct clutches must be dual fed either internally or with the VB.
Tight endplay.
11-06-2009, 07:44 PM
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jake you are a huge help to this forum thank you. How do i go about rollerizing the planet sets and what endplay should i aim for no one knows anything about these boxes in aus 
11-06-2009, 09:47 PM
#5
I aim for .005-.010 endplay on the rear section of a TH400 or 4L80E. You can get it pretty tight with the torrington bearings.
You have to keep in mind the reaction carrier floats between the rear planet and center support. The tighter your endplay the less it floats and the less potential "wobbling" it can do.
I use the same bearing in the rear of the case and between the planets but basically you need to use a torrington and lathe cut the pieces to get the needed clearance.
I get front endplay down to .010-.020". Some like to get it really tight but I haven't found it necessary.
You have to keep in mind the reaction carrier floats between the rear planet and center support. The tighter your endplay the less it floats and the less potential "wobbling" it can do.
I use the same bearing in the rear of the case and between the planets but basically you need to use a torrington and lathe cut the pieces to get the needed clearance.
I get front endplay down to .010-.020". Some like to get it really tight but I haven't found it necessary.
11-07-2009, 03:57 AM
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thanks jake realy appreciate it do you have the part numbers for the torrington bearings also can you pm me a price for everythin needed to build my trans like all clutches seals bearings etc i have a super drum and shafts organised and will be here soon i hope just need all the soft parts and a valve body do you do 1 ...? i need a transbraked forward pattern on if possible was gonna go TCI but apparently have a few bugs
cheers
cheers
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11-16-2013, 09:23 PM
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4l80e end play issues I aim for .005-.010 endplay on the rear section of a TH400 or 4L80E. You can get it pretty tight with the torrington bearings.
You have to keep in mind the reaction carrier floats between the rear planet and center support. The tighter your endplay the less it floats and the less potential "wobbling" it can do.
I use the same bearing in the rear of the case and between the planets but basically you need to use a torrington and lathe cut the pieces to get the needed clearance.
I get front endplay down to .010-.020". Some like to get it really tight but I haven't found it necessary.
You have to keep in mind the reaction carrier floats between the rear planet and center support. The tighter your endplay the less it floats and the less potential "wobbling" it can do.
I use the same bearing in the rear of the case and between the planets but basically you need to use a torrington and lathe cut the pieces to get the needed clearance.
I get front endplay down to .010-.020". Some like to get it really tight but I haven't found it necessary.
On the rear end play check, do you leave center support bolt out, and then take reading from mainshaft?
Thanks....
