4l80e shift kit ? about the check balls
The old HD2 kit had you doing mods to the stock plate, the newer one comes with a plate, you just drill the feed holes to your desired size and go.
Much easier to install the newer one and minimizes drilling on the VB.
I don't use the HD2 kit anymore when building a trans but it will work well for you.
Much easier to install the newer one and minimizes drilling on the VB.
I don't use the HD2 kit anymore when building a trans but it will work well for you.
Did do what,
drilling the hole for full time lube?
It's good on towing rigs that maybe at or near WOT for extended periods of time.
It can be problematic in some applications because the converter charge pressure gets too high and can cause engine thrust bearing damage from the converter pushing forward into the crankshaft.
It's a common issue on TH400's, and the full time lube mod can make it worse, as well as aftermarket input shafts, excessive line pressure, etc.
There's not as much time on the 4L80Es in performance applications to see the common issues we've had 40 yrs to find on a TH400.
drilling the hole for full time lube?
It's good on towing rigs that maybe at or near WOT for extended periods of time.
It can be problematic in some applications because the converter charge pressure gets too high and can cause engine thrust bearing damage from the converter pushing forward into the crankshaft.
It's a common issue on TH400's, and the full time lube mod can make it worse, as well as aftermarket input shafts, excessive line pressure, etc.
There's not as much time on the 4L80Es in performance applications to see the common issues we've had 40 yrs to find on a TH400.
Launching!
Joined: Jan 2008
Posts: 238
Likes: 0
From: AUSTRALIA
Jake , i installed the old hd2 kit , now i heard there is a newer one . Any way there was a mod im sure i did to the pump and that was drilling a hole which was on the instruction sheet with the pump picture . I m becoming woried about it . I recently had a faulty 3-4 solenoind that became faulty after several dyno pulls , we lost 3rd and when i inspected trans i noticed that the 4 metal lugs that hold the plastic tangs became very loose and could not operate any more so i changed it to a new one and then it had 3rd gear again.Could this mod cause such a thing. I have spent alot of money on all the best parts available, you name it i brought it
Sounds like a faulty solenoid and nothing more, the full time lube mod will not cause a sol failure.
It is a sound mod in theory but in SOME applications it can cause problems.
It is the same mod used on the TH400, and for the same effect.
TH400's are known in some cases, particularly with fixed line pressures (full manual valve body), to have excessive converter charge pressure.
This forces the converter forward into the engine, taking out the thrust bearing.
Good builders do pump mods to slightly restrict converter charge flow (and effectively pressure) on TH400's that fall into the likely category (fixed line, certain engines with weak thrusts, etc)
I haven't really paid attention to the possible restrictions on the out side of the converter to see if it might be an common issue on a 4L80E too, but I haven't heard of any issues. Although not too many 4L80Es running around with fixed line pressure either... I have a few that way though
I know Trinity does as well.
It is a sound mod in theory but in SOME applications it can cause problems.
It is the same mod used on the TH400, and for the same effect.
TH400's are known in some cases, particularly with fixed line pressures (full manual valve body), to have excessive converter charge pressure.
This forces the converter forward into the engine, taking out the thrust bearing.
Good builders do pump mods to slightly restrict converter charge flow (and effectively pressure) on TH400's that fall into the likely category (fixed line, certain engines with weak thrusts, etc)
I haven't really paid attention to the possible restrictions on the out side of the converter to see if it might be an common issue on a 4L80E too, but I haven't heard of any issues. Although not too many 4L80Es running around with fixed line pressure either... I have a few that way though
I know Trinity does as well. Launching!
Joined: Jan 2008
Posts: 238
Likes: 0
From: AUSTRALIA
Sounds like a faulty solenoid and nothing more, the full time lube mod will not cause a sol failure.
It is a sound mod in theory but in SOME applications it can cause problems.
It is the same mod used on the TH400, and for the same effect.
TH400's are known in some cases, particularly with fixed line pressures (full manual valve body), to have excessive converter charge pressure.
This forces the converter forward into the engine, taking out the thrust bearing.
Good builders do pump mods to slightly restrict converter charge flow (and effectively pressure) on TH400's that fall into the likely category (fixed line, certain engines with weak thrusts, etc)
I haven't really paid attention to the possible restrictions on the out side of the converter to see if it might be an common issue on a 4L80E too, but I haven't heard of any issues. Although not too many 4L80Es running around with fixed line pressure either... I have a few that way though I know Trinity does as well.
It is a sound mod in theory but in SOME applications it can cause problems.
It is the same mod used on the TH400, and for the same effect.
TH400's are known in some cases, particularly with fixed line pressures (full manual valve body), to have excessive converter charge pressure.
This forces the converter forward into the engine, taking out the thrust bearing.
Good builders do pump mods to slightly restrict converter charge flow (and effectively pressure) on TH400's that fall into the likely category (fixed line, certain engines with weak thrusts, etc)
I haven't really paid attention to the possible restrictions on the out side of the converter to see if it might be an common issue on a 4L80E too, but I haven't heard of any issues. Although not too many 4L80Es running around with fixed line pressure either... I have a few that way though
I know Trinity does as well. i have an old hd-2 kit that was never installed, i wonder if i could get the updated sep plate for it from TG
i noticed on the 2005 unit i built(or tried to anyway) it had the updated "thick" snap ring from the factory that they give you in the kits, along with some other stuff
i noticed on the 2005 unit i built(or tried to anyway) it had the updated "thick" snap ring from the factory that they give you in the kits, along with some other stuff
I think the issue with full time lube in an 80 is not a problem. I did this mod on Parish's blue truck and it was not a problem as far as I know. (1000+rwhp) Now in a 400 if a trans brake is being used I understand Jakes point here and agree. When the brake is applied the transmissions line pressure is very high. The full time lube mod is tapped into the line pressure circuit so I see the point in not doing this with a trans brake. Vince
bump for looking for old info . . .
pulled my trans appart and found an extra check ball that wasn't in the directions. . . .
4L80e 8th check ball, leave out, take out check ball
pulled my trans appart and found an extra check ball that wasn't in the directions. . . .
4L80e 8th check ball, leave out, take out check ball
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