th 400
You can make one work but why do you want too?
Most who have done it agree it is a race car thing to do. The lack of lockup and OD substantially decreases drivability and on the street you will be less comfortable with a decent amount of stall.
There are dedicated racecars making the 4L60E last even in the 9s so most folks are way too quick to jump on this bandwagon.
Most who have done it agree it is a race car thing to do. The lack of lockup and OD substantially decreases drivability and on the street you will be less comfortable with a decent amount of stall.
There are dedicated racecars making the 4L60E last even in the 9s so most folks are way too quick to jump on this bandwagon.
Thread Starter
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Joined: Sep 2008
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From: N.c.
Well i found a good deal in one a i need a tranny 4 it. I figured it would hold better than another 700r4 cause i dont have the money to have one built. I just wanted to tho sumthing n and go raise hell at the track
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Joined: Feb 2008
Posts: 458
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From: Keller, Texas
general rule of thumb for "race cars"
th 400 = big block
th 350 = small block
glide = crazy fast cars
i wouldnt throw a th 400 behind a lt1 unless your making 800+ horsepower. like tauber unit said th 400s rob tons power, i believe around 25%, and they weigh a ton.
Id stick a od tranny such 4l60e, 700r4, and 200r4.
th 400 = big block
th 350 = small block
glide = crazy fast cars
i wouldnt throw a th 400 behind a lt1 unless your making 800+ horsepower. like tauber unit said th 400s rob tons power, i believe around 25%, and they weigh a ton.
Id stick a od tranny such 4l60e, 700r4, and 200r4.
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From: ringgold,ga
i think a turbo 400 is around the same weight as a 4l60. but, as mentioned they rob power. a basically stock turbo 350 with a shift kit and conv., will hold up for years behind a 10sec. (1/4mile)car. BTW, a turbo 400 has a 2.48 1st gear vs. a 350 2.52 and the 4l60 3.06. the stronger of the powerglides is 1.76. i swapped originally from the 4l60 to a turbo 350 and picked up .2tenths in the 8th with a good conv. i also had a good conv. behind the 4l60,aswell. i eventually swapped to a glide. the glide slowed it down on the motor due to the gear ratio and the lack of rear gear. it did however run faster with the n2o (around .1-.15tenths 1/8 mile).
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Joined: Sep 2008
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From: tampa
as stated i agree. TH400's and TH350's have their place and are not bad transmissions.
we need to know more about your car and intended uses before helping you reach a verdict.
if you are daily driving it not having OD is going to kill your gas milage, especially on the highway.
if its a weekend fun (limited use) car or track car go for a TH350. they are cheap and easy to build and will hold all the power you need.
if its your DD and you do lots of highway driving you will be kicking yourself in the *** not having OD plus running at 3500 RPM going 70 MPH on the highway is annoying. i had a third gen with a TH350 prior to my IROC.
we need to know more about your car and intended uses before helping you reach a verdict.
if you are daily driving it not having OD is going to kill your gas milage, especially on the highway.
if its a weekend fun (limited use) car or track car go for a TH350. they are cheap and easy to build and will hold all the power you need.
if its your DD and you do lots of highway driving you will be kicking yourself in the *** not having OD plus running at 3500 RPM going 70 MPH on the highway is annoying. i had a third gen with a TH350 prior to my IROC.
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From: ringgold,ga
i'd also agree on knowing the driving info. if you do alot of highway driving a th350 or 400 might not be your choice with a high stall conv. however, i run a th350 with a tci streetfighter 10" (3000-3200 stall speed) convertor and stock 3.08 gears with 27" tall tires out back in my lt1 efi. 72 chevelle. it avrg. around 18.5 mpg. with some hwy. some city driving.
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From: tampa
not to hijack, i am just sharing my experiance...
i think that car had 4.30's or somthing like that. that was a dumb setup anyways. i bought it for $1300 had a wimpy 305 that was cammed with vortec heads. probably didnt make 250 at the rear wheels and the idiot put a TH350 (it stalled around 2500 but i dont know the specs)vand 9" on it. it was stupid. like the 305 would break theTH350 and 9". it was a dog. i never took it to the track. sold it and make about $500 profit after fixing it up a little bit. and now have my 1985 IROC with a 350 700R4 and a new 9" with 4.10's. which is setup to drag.
you will probably want to retain OD.
i am telling you 3500 RPM at like 70 MPH is annoying especially on a 45 min drive.
i think that car had 4.30's or somthing like that. that was a dumb setup anyways. i bought it for $1300 had a wimpy 305 that was cammed with vortec heads. probably didnt make 250 at the rear wheels and the idiot put a TH350 (it stalled around 2500 but i dont know the specs)vand 9" on it. it was stupid. like the 305 would break theTH350 and 9". it was a dog. i never took it to the track. sold it and make about $500 profit after fixing it up a little bit. and now have my 1985 IROC with a 350 700R4 and a new 9" with 4.10's. which is setup to drag.
you will probably want to retain OD.
i am telling you 3500 RPM at like 70 MPH is annoying especially on a 45 min drive.
Thread Starter
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Joined: Sep 2008
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From: N.c.
ok thanks guys i guess i just need to wait and buy a good od tranny cause my car is mostly stock, I was going 2 buy some nitirous and that tranny and give it hell but i guess i will wait, Thanks every one with ur info
