svtlightning93 Posted November 12, 2010 Report Share Posted November 12, 2010 Coming home from fishing today and my trans quit pulling , put it in second to get home (took a while), not much of a trans guru but I would assume the clutches are shot. Was planning on building a supercharged 408 for the truck and then getting a built trans, but looks like I'm gonna need a trans first, Couple of questions, been looking around and think I narrowed it down to LFT, performabuilt, and maybe monster trans, will the fully built 4L60E hold up to the torque the 408 will put out, Next question, Possibly looking at a stall, but would it affect me towing my boat,(21 ' bass boat), Also this truck is a daily driver, any suggestions, thanks Quote Link to comment Share on other sites More sharing options...
shawnss Posted November 12, 2010 Report Share Posted November 12, 2010 (edited) well i have a turbo stock 6.0 pushing 13 psi and im going on my 4th trans. i have smoked two built 4l60 in 2 years. it really depends on your driving habits. i launch my truck quite a bit in boost. this winter im going with the 4l80 trans swap. from what ive heard a stock 4l80 with a few upgrades will out last a fully built 4l60/4l65. at this point im wishing i would have done the 4l80 swap 2 years ago. im in $6000 in 2 blowin up trannys. if your going with a 408 i personally wouldnt go with a 4l60. if i can get this 4l80 to hold on my set up now next summer i doing a 408 myself with alot of boost and nitrous. heres a link on the 4l80 swap. ill let you know how mine goes im doing the swap in feb. 4l80 trans swap http://www.performancetrucks.net/forums/showthread.php?t=424904 Edited November 12, 2010 by shawnss (see edit history) Quote Link to comment Share on other sites More sharing options...
bruiser04 Posted November 12, 2010 Report Share Posted November 12, 2010 talk to angry greg he twisted a billet out put shaft with a 408 and a radix with 5lbs of boost i dont think a 60e will hold up very long Quote Link to comment Share on other sites More sharing options...
Fireman31 Posted November 12, 2010 Report Share Posted November 12, 2010 How many miles are on your truck? How heavy is the boat/trailer? Do you remember how hot the trans got? Do you still have the stock trans cooler? Remember, heat is the #1 killer of automatic transmissions, there is the chance you overheated your trans since you were pulling a decent load..... Quote Link to comment Share on other sites More sharing options...
2bfast Posted November 12, 2010 Report Share Posted November 12, 2010 (edited) talk to angry greg he twisted a billet out put shaft with a 408 and a radix that wasnt a true 300mm shaft either, you can tell how it broke it wasnt Remember, heat is the #1 killer of transmissions this Edited November 12, 2010 by 2BFAST (see edit history) Quote Link to comment Share on other sites More sharing options...
2bfast Posted November 12, 2010 Report Share Posted November 12, 2010 sounds like the typical 3/4 failure to me Quote Link to comment Share on other sites More sharing options...
svtlightning93 Posted November 15, 2010 Author Report Share Posted November 15, 2010 Well, Ordered my new trans today, went with a performabuilt level 3 with 2600-2800 10.5 billet converter, also backed by a 2 year warranty. Quote Link to comment Share on other sites More sharing options...
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