I need some advice here... I'm thinking of buying the level 2 TH400 package from tri-shield performance. It would be going behind a badass pump gas iron head 455 "for now". My concern is: I only want to buy one trans, so will it last for my future plans- a twin turbo 455 with some serious power? Anyone here using this trans? I'm sure it works well, I just want to know how much abuse this thing will tolerate or should I "go bigger"? o No:
A TH 400 is one tough trans. It was designed in the muscle car era to handle the GM big block engine torque.
JW has a bunch of TH 400s on hand. Sometime look at the input shaft diameter on one of those compared to a more modern trans like a 200R or a 700R.
Jim, Remember the stories about the experimental Turbo charged Nailheads that snapped the THM 400 input shafts. Now that's torque.
I have some excellent pictures of that engine... I love showing it off to the import lover friends of mine and telling them it was never produced because it broke GM's toughest trans!!!
I think they were breaking the dyna flow input shafts - circa 1962-3 still probably could do some damage to a ST400 too @ that torque:Brow:
i have a tri shield level 2 built trans and converter. works awsome behind 550 hp street car should hold good power. i like it a lot
cool... thanks for some feedback... I'm planning on sticking it behind a 450-500 hp 455 for now, which I know it'll play nice with... but there is a twin turbo 494 stroker in my future... so I'll have to give JW a shout...
well I'll see which ones I can find in my massive "my pictures" folder on the laptop... I do remember one pretty clearly so I think it'll be an easy find...
I installed one of Jim's Level 2 T400's with clutch upgrade, hughes deep alu pan and a custom converter behind a 625 HP motor last year. Working great! I would call him up and discuss your needs. Greg
:Comp: Well while out on saturday night I ran into an old friend who says he can make my TH350 live behind a pretty bad-ass big block, but it won't hold up for any crazy turbo ideas :laugh:. He's got the convertor I need already (slightly used) and the price he gave me for a hi-po rebuild is too good to refuse... I'm starting to think about abusing a trans I already have... When I told him about my crazy turbo ideas... he said he could make a TH400 put up with up to 1000 hp for a good price too... he's got a great reputation around here so I'm seriously thinking about it instead of Tri-Shield (no offense Jim)... not only that, if I break something he's a little closer by... lol. o No: Then again, pulling that trans for the second time when I build that twin turbo motor won't be fun... and I know where a long shaft BOP TH400 is... problem is I have to part out the $400 rustbucket '72 catalina it's hiding in, so... maybe I'm just lazy, or maybe my landlord would have a heart attack if he saw ANOTHER old car getting yanked apart in the shop or in the driveway... but a free trans is still a free trans... :Brow: Anyone want some poncho parts? it's got a 400-4 in it... :laugh:
