Already searched...couldn't find a definitive answer.

As the title states I have a 98 2200sfi 4spd auto cavy that I'm looking to boost. Just wondering if I should even bother as I'm not interested in swapping tranny's. I see that the bottom end will hold 200+hp with the right tune...but what about my stock 175,000 km (110,000 Miles) tranny?

I am not sure what numbers the 4 spd can handle but one of the biggest killer of autos is heat, look into a good sized tranny cooler, not sure if they make a shift kit for them or not but another thing to look into. Stock trannys slip to provide smooth shifting/also creates alot of heat, with a shift kit, the tranny with have more firmer/quicker shifts and reduce heat aswell. Maybe a higher stall torque convertor will help too, not sure?


2000 Cavalier Z24 5spd - Intake, Dynomax muffler, Hawk Pads, Powerslot rotors, Sportlines/Koni reds, Neon Coil, MSD 8.5 Wires - **SOLD**
2014 Kia Forte Koup SX 6spd - 1.6L Turbo - My new car
2015 Kia Sorento EX V6 AWD - Wifes Car

Skilz was around 300whp (ld9) and I believe Bonnet was slightly over 300 (l61). As far as I can remember, neither had upgraded internals either...just a Yank TCC and trans cooler. You should be fine.




I have no signiture

i believe we're gonna get to find out this summer....

david should be pushing well over 375whp with his.

I hope to be pushing a lot through mine by the end of the summer too!

z yaaaa wrote:i believe we're gonna get to find out this summer....

david should be pushing well over 375whp with his.

Yep, thats the plaaaan maaaan

Btw, to the OP, I was at 303 for 2 years, just a few track plasses though. I have a Yank stall with upgraded various internals along with an lsd, and a tranny cooler. If anything, make sure you get a cooler










~2014 New Z under the knife, same heart different body~
______________________
WHITECAVY no more
2012 numbers - 4SPD AUTOMATIC!!
328 HP
306 TQ

LOL crap i forgot your's wasnt "stock"!

350ish what most handle, but honestly most haven't seen more than that to REALLY see how well they hold up.




PRND321 Till I DIE
Old Motor: 160whp & 152ft/lbs, 1/4 Mile 15.4 @88.2
M45 + LD9 + 4T40-E, GO GO GO

from all the research ive done.....the stock 4t40e should be ok to around 350ish but if it were me i would at least do a tranny cooler as well as a converter


mine wont be stock for long so i cant tell ya how much it will hold....looking to push close to 450 out of mine come fall






RIP JESSE GERARD.....Youll always be in my thoughts and prayers...

Yep 350 is what I have heard as well, but like you guys mentioned WHO really has pushed the 4SPD AUTO that we know of much over 300hp? Nobody other than us mentioned. Who's to say what number is right ya know. If mine breaks at 400hp, then I will be doing a 5 speed swap lol










~2014 New Z under the knife, same heart different body~
______________________
WHITECAVY no more
2012 numbers - 4SPD AUTOMATIC!!
328 HP
306 TQ

im hoping with all my mods and the rebuild i can push it over 400....i really dont wanna dont a 5 speed swap








RIP JESSE GERARD.....Youll always be in my thoughts and prayers...

well... do we know how much power acer was pushing? he was running 12's on a 4t40e...

also, i remember jeremy (skilz) bragging about how he beat the ever livin ish out of his over the years and it was fine. it ran low 13's all day long boosted.

and then there is the 11 second SMG drag car, which well... had a fully built 4t45e so i guess we really cant count them but its in the same realm!

david, you better break 400 with an auto!!! im rootin for ya man!!

z yaaaa wrote:well... do we know how much power acer was pushing? he was running 12's on a 4t40e...

also, i remember jeremy (skilz) bragging about how he beat the ever livin ish out of his over the years and it was fine. it ran low 13's all day long boosted.

and then there is the 11 second SMG drag car, which well... had a fully built 4t45e so i guess we really cant count them but its in the same realm!

david, you better break 400 with an auto!!! im rootin for ya man!!

SMG was low 300's tho


RIP Cpl Derek Kerns And Cpl Robby Reyes
24th MEU VMM-261 (REIN) V22 Crewchiefs
11 April 2012 Morocco (African Lion)

Thanks brad, im hoping.

I THINK SMG was at 355.










~2014 New Z under the knife, same heart different body~
______________________
WHITECAVY no more
2012 numbers - 4SPD AUTOMATIC!!
328 HP
306 TQ

i thought they made more than that....the car had a 4t45e in it and went like 11.3



http://www.cobaltss.net/forums/complete-cars-101/smgs-2005-cavalier-cloan-race-car-forsale-159264/







RIP JESSE GERARD.....Youll always be in my thoughts and prayers...

car weighed 2335 made 330 whp on 15-16psi according to his post on youtube where his 11 second pass is SMG 11 Sec


RIP Cpl Derek Kerns And Cpl Robby Reyes
24th MEU VMM-261 (REIN) V22 Crewchiefs
11 April 2012 Morocco (African Lion)

i would argue those power numbers but regardless thats a 4t45e thats "Fully build race prepared " so that goes against the fully stock ? that is being asked in this thread


B.o.t i would say as long as you have clean cluid it in and decent cooling you should be able to hold 400 in theory but no one that i know of has attempted it on a fully stock transmission






RIP JESSE GERARD.....Youll always be in my thoughts and prayers...

^^ True, but I wouldnt try to push the fully STOCK 4t40e tranny with that kind of power lol










~2014 New Z under the knife, same heart different body~
______________________
WHITECAVY no more
2012 numbers - 4SPD AUTOMATIC!!
328 HP
306 TQ

I thought I heard of an S10 making close to 400whp before completely destroying his 4T40E. I can not remember though. I wish I could be more helpful but my tranny doesnt fit the bill as being "Fully stock" or anywhere close to that.

Transcooler would be a great investment to any one running an automatic.

Josh G. wrote:I thought I heard of an S10 making close to 400whp before completely destroying his 4T40E. I can not remember though. I wish I could be more helpful but my tranny doesnt fit the bill as being "Fully stock" or anywhere close to that.

Transcooler would be a great investment to any one running an automatic.

That would be tough, considering the s10 is Longitudinal and not Transverse




I have no signiture

Whalesac wrote:

Josh G. wrote:I thought I heard of an S10 making close to 400whp before completely destroying his 4T40E. I can not remember though. I wish I could be more helpful but my tranny doesnt fit the bill as being "Fully stock" or anywhere close to that.

Transcooler would be a great investment to any one running an automatic.

That would be tough, considering the s10 is Longitudinal and not Transverse

Show's how much I know about S10's... sorry about that.

WHITECAVY wrote:Yep 350 is what I have heard as well, but like you guys mentioned WHO really has pushed the 4SPD AUTO that we know of much over 300hp? Nobody other than us mentioned. Who's to say what number is right ya know. If mine breaks at 400hp, then I will be doing a 5 speed swap lol

True that.


-Aaron
www.TurboTechRacing.com

Performance Parts For Cavalier, Sunfire, Cobalts and More!!!

According to GM the max engine torque is 200 lb ft for the 4T40E and 215 lb ft for the 4T45E. May not be the answer you're looking for, but it's something to consider.

330whp is plenty to go 11's with that weight. they just used every ounce of it, thats all. it comes up perfectly for the weight and WHP made on the 1/4 mile ET calculator.