help me decide - The 1947 - Present Chevrolet & GMC Truck Message Board Network

phantomslinger · 12-27-2007, 10:20 PM

so i need a little help i want to get rid of my manual 3 speed its to small for all my hp with a 4.11 rear end i have a choice of a th350 with a stage to shift kit and a 3500 stall converter Or, i have a th400 with o.d also built stage2 b&m shift kit with a 3200 stall kit? any idea thought i kinda wanna keep teh 4.11 rear end because it makes a quick launch of the line???

lbpd719 · 12-28-2007, 12:08 AM

I like the 400, but it does take more juice to turn it than a 350. Are you talking serious hp? Something you are planning to enter into drags?

All comes down to preference of what YOU like and have experience with. Might be a tad bit easier to get a driveshaft for the 400 though..

phantomslinger · 12-28-2007, 10:13 AM

Quote:

Originally Posted by lbpd719

I like the 400, but it does take more juice to turn it than a 350. Are you talking serious hp? Something you are planning to enter into drags?

All comes down to preference of what YOU like and have experience with. Might be a tad bit easier to get a driveshaft for the 400 though..

yes it is a drag truck im building it my self the 3 speed manul was teh stalk trans that came witht he original 289 6 cylinder now it a big block 402 from the l88 chevelle, my trucks dyno was 468hp and 506ftq its still not finished but there lot more i can do but all it takes is the all might cubic dollar
thank you for your imput i think i will go with the 400

**special-K** · 12-28-2007, 03:59 AM

Could you clarify about the TH400 with o/d?Also,what kind of hp are we talking?Lots of torquey motors came with 3spd manuals behind them.I`ve never liked them,myself.But,they can take alot more than many give credit for.I like a TH350 over a TH400 unless you are talking strickly track-use serious hp or a truck that hauls alot of weight.Th400s scrub off hp to shift.

ChevLoRay · 12-28-2007, 04:08 AM

The 400's have a taller first gear than the 350's which is why the 350's launch better. But, you have a 4.11 rear gear. If you have the 400 and it's built, then my question is....what is the question? To my way of thinking, and since I have a TH400 in my truck with 3.23's....the fact that you have a built 400 AND a 4.11 gear....says no issues exist. Just put the 400 in it and go. There will be a difference in the driveshaft length, with the 400 taking a slightly longer shaft than the 350.

Longhorn Man · 12-28-2007, 11:58 AM

I'm wondering about this overdrive Th400.... there's no such thing.

phantomslinger · 09-20-2008, 01:54 AM

Quote:

Originally Posted by Longhorn Man

I'm wondering about this overdrive Th400.... there's no such thing.

the th400 with over drive is actuall the 700r so there not very good unless built even then everyone told me to stay away from them :/

phantomslinger · 12-01-2008, 04:50 AM

Quote:

Originally Posted by Longhorn Man

I'm wondering about this overdrive Th400.... there's no such thing.

sorry i havent been on to anwser this the 400 with o/d is actually a 700 r

phantomslinger · 09-20-2008, 01:57 AM

this is my summer drag truck it now bored 10 over on the 402close chamber high comp heads new raised intake manifold full heddmen header to flowmaster race seires accel hei new 800 cfm thunder series endle brock and more jsut taking my tiem with it

Longhorn Man · 12-01-2008, 06:47 AM

that is the first I have ever heard that.The 700 is closer to the TH350 than it is the TH400 as far as strength and durrability goes.

12-27-2007, 10:20 PM	#1
phantomslinger Registered User Join Date: Mar 2005 Location: eagle point OR Posts: 28	help me decide so i need a little help i want to get rid of my manual 3 speed its to small for all my hp with a 4.11 rear end i have a choice of a th350 with a stage to shift kit and a 3500 stall converter Or, i have a th400 with o.d also built stage2 b&m shift kit with a 3200 stall kit? any idea thought i kinda wanna keep teh 4.11 rear end because it makes a quick launch of the line???

12-28-2007, 12:08 AM	#2
lbpd719 Zappaphile! Join Date: Apr 2007 Location: Los Banos, California Posts: 228	Re: help me decide I like the 400, but it does take more juice to turn it than a 350. Are you talking serious hp? Something you are planning to enter into drags? All comes down to preference of what YOU like and have experience with. Might be a tad bit easier to get a driveshaft for the 400 though.. __________________ 1969 C20 LWB Camper Special - The Beater.. 1998 Cheyenne V6 - 4/6 Drop - For The Son

12-28-2007, 03:59 AM	#4
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,852	Re: help me decide Could you clarify about the TH400 with o/d?Also,what kind of hp are we talking?Lots of torquey motors came with 3spd manuals behind them.I`ve never liked them,myself.But,they can take alot more than many give credit for.I like a TH350 over a TH400 unless you are talking strickly track-use serious hp or a truck that hauls alot of weight.Th400s scrub off hp to shift. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

12-28-2007, 04:08 AM	#5
ChevLoRay Old Skool Club Join Date: Jun 2001 Location: Benton, AR "The Heart of Arkansas" Posts: 10,880	Re: help me decide The 400's have a taller first gear than the 350's which is why the 350's launch better. But, you have a 4.11 rear gear. If you have the 400 and it's built, then my question is....what is the question? To my way of thinking, and since I have a TH400 in my truck with 3.23's....the fact that you have a built 400 AND a 4.11 gear....says no issues exist. Just put the 400 in it and go. There will be a difference in the driveshaft length, with the 400 taking a slightly longer shaft than the 350. __________________ Member Nr. 2770 '96 GMC Sportside; 4.3/SLT - Daily driven....constantly needs washed. '69 C-10 SWB; 350/TH400 - in limbo The older I get, the better I was. Last edited by ChevLoRay; 12-28-2007 at 04:09 AM.

12-28-2007, 11:58 AM	#6
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: help me decide I'm wondering about this overdrive Th400.... there's no such thing.

09-20-2008, 01:57 AM	#9
phantomslinger Registered User Join Date: Mar 2005 Location: eagle point OR Posts: 28	Re: help me decide this is my summer drag truck it now bored 10 over on the 402close chamber high comp heads new raised intake manifold full heddmen header to flowmaster race seires accel hei new 800 cfm thunder series endle brock and more jsut taking my tiem with it

12-01-2008, 06:47 AM	#10
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: help me decide that is the first I have ever heard that.The 700 is closer to the TH350 than it is the TH400 as far as strength and durrability goes.



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