Anyone break the 4T40E yet?

pontiacjeff · Post by **pontiacjeff** » Fri Oct 22, 2004 1:19 pm

If so, how much power and what broke? or did it just wear out behind a stock engine? I know the 'woo that donated my head swap got a new trans at about 60K miles. I wonder if it will hold up to any power? Like over 300hp.

daewooluvr · Post by **daewooluvr** » Fri Oct 22, 2004 1:40 pm

well the GM site says they can handle up to 200lb-ft at the crank.
I'm sure with a lil beefing up they can handle anything you want.
Problem is the gearing sucks.

pontiacjeff · Post by **pontiacjeff** » Fri Oct 22, 2004 2:14 pm

Really? What are the gear ratios? or is it the final drive gear ratios that suck.

mordy · Post by **mordy** » Mon Apr 24, 2006 9:55 am

Is this the 4 gear transmission with no deepstick, found in Nexia (Cielo) ?
then yes, twice

Post by **PrecisionBoost** » Tue Apr 25, 2006 4:28 am

Why wouldn't you use a beefed up TH125C... there are Sunbird guys out there (like Ned Southwick) running high horsepower C20GET's in Sunbirds.

aveo04slvr · Post by **aveo04slvr** » Mon May 22, 2006 11:14 pm

I think this is the trans in the Aveo, I busted it at 36,040 they replaced it free, but is was completely stock, all i did was try to spin the tires at 30mph, yeah i slammed into neutral, tached it out, hit the hold button, then slammed it into 1st, Yeah, so i lost 1st, but luckily, there is that hold button so you can start out in 2nd if need be, Well, i know not to play like that any more... now i'm at 58,000 and it runs fine.

woo · Post by **woo** » Mon May 22, 2006 11:32 pm

i snapped a 2L leganza auto. Apparently i smashed all the internals to pieces and not even the case was useable because i had cracked it.

daewoomofo · Post by **daewoomofo** » Tue May 23, 2006 12:52 am

i fried the clutches in mine, replaced for free... got to love that warranty!

aveo04slvr · Post by **aveo04slvr** » Tue May 23, 2006 4:58 am

hey woo how'd you manage to do that?

woo · Post by **woo** » Tue May 23, 2006 5:30 am

dunno.... one day the car went then one day it started slipping out of gear, so i went to the local burnout spot to put an end to it

99sunfireconvertible · Fri Jul 15, 2011 7:30 am

I did somehow. check this out.

I dono how it happend, i was just driving, heard a clunk and then a snap, then saw white smoke in the rear view and knew i was walking.
guess i should have checked the fluid in it, looks like it hasnt ever been changed, was black and smelled burnt. kinda got a heavy foot i guess.
Cause i doubt the 150HP 2.4 GM LD9 could tear this thing up like this without some sort of outside problem, Like general maintenece. Its alright though, first gear has been slipping for a while now and i have an entire backup car. In the works right now of swapping it out and actullay changing the filter and fluid on the doner this time around.

The original daewootech forum

Anyone break the 4T40E yet?

Anyone break the 4T40E yet?

I broke mine

Re: I broke mine

Re: Anyone break the 4T40E yet?