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View Full Version : 4l80e vs t400 opinions wanted


B
07-24-2006, 05:25 PM
yep as it reads ... i know that i need a stand alone comp but for that alone id rather have the overdrive and the lower first gear ...planning on putting my bigblock in it soon so im looking for a bullit proof way to handle the 500 ponies


don't know what year is best for my application ...their must of been changes threw the years ... my buddie runs one from a 95 but w just a stock big block


ive got a t400 w all the goods in it allready ,manul valve body corvette srvos ,bomb proff clutch pacs ,ect ect ... thats allready handled the big block but that was with 30 " slicks not 44s so

what u think der das goot.?[cheers] [cheers]

85_GMC_4x4
07-24-2006, 05:42 PM
If you've already got it, run the TH400 until it gernades then look for an overdrive tranny.

30" slicks on a hard street launch is petty comparable to 44's offroad. It's about traction more than horsepower.

B
07-24-2006, 05:47 PM
If you've already got it, run the TH400 until it gernades then look for an overdrive tranny.

30" slicks on a hard street launch is petty comparable to 44's offroad. It's about traction more than horsepower.


they will be differnt lenghts so ill have to change driveshalfts again ... and 4 the bigblock i want 1410 ujoints the whole way along to help keep it together ... so that won't be cheap

id like to just do this once .....[27] what i said the last ten times it's gotten remodified ...[32]

stuckle
07-24-2006, 08:34 PM
4l80e[36][36]


electrionic shift points[36]

Tmax
07-24-2006, 08:39 PM
bigb as far as I know the engine comp controls the 4l80E. are you planning to use a computerized motor or old school one?

kootenaycat
07-24-2006, 10:01 PM
I think aftermarket makes stand alone controllers for them. Not sure how they get a throttle reference though! Must have a TPS of some sort to adapt to the carb/linkage.

StinkFinger
07-24-2006, 10:24 PM
they will be differnt lenghts so ill have to change driveshalfts again ... and 4 the bigblock i want 1410 ujoints the whole way along to help keep it together ... so that won't be cheap

id like to just do this once .....[27] what i said the last ten times it's gotten remodified ...[32]

if the th400 is not a truck one you will be changing the tail shaft as well

B
07-24-2006, 11:32 PM
if the th400 is not a truck one you will be changing the tail shaft as well




true dat as well and yes stand alone comps for the tranny are avilble moroso makes a new one with 3 or 5 presets just hit the button for mud, highway,or trails and your good to go not stuck with shifting when u don't want to ...

anything bad about the 4l80 e other than have to keep a comp happy and dry....?

ottoman
07-28-2006, 08:56 PM
run the 400 and buy some gears . you will never need od with 44's anyway

Lucas
07-31-2006, 08:33 PM
run the 400 and buy some gears . you will never need od with 44's anyway

ya who in there right mind would want to go over 100k with 44's anyway


you need a 700r4 built not one that needs a computter,vss,etc

u2slow
07-31-2006, 09:14 PM
I thought the TH400 and 4L80E used the same 1st gear. :confused:

TH700 1st gear is lower though.

MetalMan
07-31-2006, 10:09 PM
TH700R4 is actually weaker than a TH2004R when they're both built to the nads. I doubt either would hold up too well though. Frankly, since you've already got the TH400, and it's already built up, I'd go with it. Changing the tailshaft should still be a helluva lot cheaper than buying and beefing and swapping to a 4L80E, and as has already been said...what would you possibly need OD for?

ottoman
08-03-2006, 10:57 AM
if you run a 205 with the 400 u shouldn't need to change the trans tail shaft

gordwould
08-03-2006, 12:11 PM
i would go 700 because of no need for a comp to use it and they can be built to with stand the hp your puttin in but only if you want the od.
i would stick with the 400 if you dont and if you only want a better crawl ratio put in a reduction box in between tranny and t-case just my .02[cheers]

Nutbar
08-03-2006, 12:29 PM
the 700 will not handle the kind of torque that B's big block puts out (right now that thing makes in the range of 600 hp and probably the same torque at least) the 4L80E is at least based off the turbo 400 so it is a way heavier duty tranny than the 700 or the 4L60(the electronic version of the 700) and if you have the coin I would use the 4L80E you can get a stand alone computer for it to run on a carbed truck and with that you can actually tune your tranny for shift points and how hard it shifts.

B
08-03-2006, 03:05 PM
thank u mikey and ive all ready done 140 on 44s and its scary but u should hear the tires howl [5][5][5] plus the idea is to do the doubler behind ther by i can keep my 4 :10s and put on a show cuase by the time i buy gears ,install kits, and put them in ...thats a grand towards my doubler and im sure there will be a line up to take the turbo 400 off my hands ... so i will just wait till my small block sells and then do this...
the other thing i will get with the doubler is a way better front drive shalft angle so then i can but my 1410 yolks all the way around and go from there ... then its just swaping bodys every couple of years :D


but the point of the question really is what year 4l80 e do i want ... anybody have any ideas !!!! .... oh and im done with carbs to ... get out the needle ill be looking for a safe injection site :D [5][5]

Tmax
08-03-2006, 03:11 PM
hey bigb why don't you go with your other plan of the Cummins B3 motor and maybe a NV4500.

back to topic i think the later 4L80E's are the better ones. i've had a few of them in stock form in various trucks and have never had a problem.
[cheers]

Big_Ern
08-03-2006, 03:20 PM
I wouldn't think a desiel would work very well in a mud bogging application due to the limited rpm range and thus limited tire speed

B
08-03-2006, 03:21 PM
hey bigb why don't you go with your other plan of the Cummins B3 motor and maybe a NV4500.

back to topic i think the later 4L80E's are the better ones. i've had a few of them in stock form in various trucks and have never had a problem.
[cheers]


becuse i have a girlfreind and id have to trade her in for to afford a 24 valve cummins [27] ... and yours is stinky enough [f] ....


just money dude ... cost me another five grand over the way im going and i just cant put that much on the never never plan[cheers]

Nutbar
08-03-2006, 03:27 PM
A built up deisel would do alright as a bogger but you would either need a really good clutch so you could launch in a tall gear or an automatic so it can shift while diggin.

After drivin Nancy's Dodge down to Moab and around town a little I would put that thing up against a lot of cars in a drag race, cold air intake 5 in exhaust 5 stage chip and dual turbos pumpin 65 psi boost, that Dodge hauls ass. [36] [36] [36]

lizard
08-03-2006, 03:39 PM
I'd stick with a built t400, plus you could always buy a lower gear set for them also. I used one in my chevy2 for years with the L88 & 14in slicks. no problems.

B
08-03-2006, 03:47 PM
yep it did do well in the car it just sucks to drive on the high way at 3500 rpm plus ....watching the 1000 cfm carb drain your tank faster than u can fill it ...

BeerBaron Sr.
08-08-2006, 08:16 PM
absoulutley right, the TH400 is bullet proof,the 700's and L80'S won"t do it as well,for the cost ,put an over drive in it,im going to do this with my
old car.[Chicago Gear or Gear Vendors ] overdrive.

Nutbar
08-08-2006, 10:46 PM
Just for all you guys that seem to know nothing about the newer overdrive automatics the 4L80E is a Turbo 400 with an overdrive gear so any of you that say that the 4L80E is not a strong tranny you better go do some more research. The 4L60 is the electronic version of the 700R4 so that is the one that is not very tough. The 4L80E is the tranny that is behind the new big block trucks and in the heavy duty 1 ton gas engine trucks it may be slightly weaker than the muscle car turbo 400s but not by much. The only drawback for conversions is you need a computer for it to work and the after market stand alone ones are pricey. If I was trying to build a street/mud race truck that would be my tranny of choice NOT the turbo 400, so get out of the past learn a little more about MODERN parts and some of you might actually be able to build trucks that are nice to drive as well as tough.

ez_b
08-09-2006, 02:07 AM
8.1 with an allison [36] i could do the front pump seal for ya in about 5hours when it blows. haha. anyways, daryl told me the t400 is the shiznat, but that was with my 3 fitty, no where near what ur puttin out, but he had it behind his 454, stock from what i understand, but held out to two or three of them? maybe user preference?

ez_b
08-09-2006, 02:16 AM
that made no sense after i read it, please don't listen to me, i'm stupid.