4L80E lost 2nd gear
Apr 17, 2008 | 03:08 PM
#31
For a transmission where the PCM is still in command of line pressure, sure... but only to a point. You would not want line pressure to have to be so low that other already-engaged clutches have a hard time holding.
A vaccuum-modulated unit can be modified by restricting the feed hold in the separator plate. (Not easy) I've hit one with a MIG at very low power to accomplish this, but any spatter sticking to the plate in other areas can cause gasket blowout and trans failure. Plate warps easily too.
A higher-stalling torque converter softens shifts too.
A vaccuum-modulated unit can be modified by restricting the feed hold in the separator plate. (Not easy) I've hit one with a MIG at very low power to accomplish this, but any spatter sticking to the plate in other areas can cause gasket blowout and trans failure. Plate warps easily too.
A higher-stalling torque converter softens shifts too.
Apr 17, 2008 | 06:30 PM
#33
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No problem, lol. I guess I'm kinda confused on the difference between the 4L80E HD sprag and the TH400 HD sprag...I was under the impression that they were the same thing, but I guess they are not??
Apr 19, 2008 | 08:33 PM
#34
Damn, I saw your user title change and I was like WTF? Another tranny bites the dust.
How many is that for you? You might hold the record around here for broken trannys.
Kyle probably has the record for the most power/longest lasting stock 60E. I couldn't tell you the diff between the 400 and 80E sprag. I replaced the one in my 400 due to the fact that I didn't know if it had an upgraded one or not, but it only cost like $50 or $60. I got it from Hughes here in town, so you might want to call the Hughes up there since they make them.
Apr 19, 2008 | 09:19 PM
#35
The hd sprag is the same one used in both units. However there is a super hold sprag drum set up that we use that was made for the 400 and can also be used in an 80e. This sprag is not a factory part for either of these units. Much wider piece and IIRC it has a few extra elements as well. Vince
