Crunch time: TH-400 or TH-350??? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

tavenner13 · 05-29-2007, 04:24 PM

time to take care of the tranny. should i beef up my turbo 350 or should i try and land a th400? its going behind my 454 big block (mostly stock with a few street goodies: 280 cam, demon 850, eddy performer rpm dual-plane). im asking because i plan on getting some head work done this winter and instgoing through other things to get more grunt. just wonderin cuz i dont wanna have to do the same thing next spring cuz i didnt do it right.

Frizzle Fry · 05-29-2007, 04:35 PM

I wouldn't put a 350 behind a big block. I know they can be beefed up but...

70GMCer · 05-29-2007, 06:23 PM

If you do the 350 up right, you won't have any problems behind the BBC, besides, the 400 used more HP

Spray-Bomb · 05-30-2007, 12:41 AM

I think your 350 should be fine

huero · 05-30-2007, 01:41 AM

The 400 is stronger but, the 350 will save you more gas.

GREASEMONKEY72 · 05-30-2007, 06:22 AM

the 400 is stronger but the gears are better in the 350 and the 350 should be if done right

OLDIRON69 · 05-30-2007, 08:17 AM

A 350 built right will hold up just fine. The guy that builds mine is over near Seven Points and it VERY reasonable. His specialty is performance trannys.

BCOWANWHEELS · 05-30-2007, 08:53 AM

Do Like The Factory Bbc Need A 400 Th Unless Your Not Going To Tow And Use It Like A Car.

Orange · 05-30-2007, 10:27 AM

Neither.

Godfather 700R4 from Mad Dog Transmissions.
888-MAD-DOGZ

Usually has stuff listed on eBay, but he's not up right now for whatever reason.

DLB

05-29-2007, 04:24 PM	#1
tavenner13 Registered User Join Date: Mar 2007 Location: Tyler, Texas Posts: 559	Crunch time: TH-400 or TH-350??? time to take care of the tranny. should i beef up my turbo 350 or should i try and land a th400? its going behind my 454 big block (mostly stock with a few street goodies: 280 cam, demon 850, eddy performer rpm dual-plane). im asking because i plan on getting some head work done this winter and instgoing through other things to get more grunt. just wonderin cuz i dont wanna have to do the same thing next spring cuz i didnt do it right.

05-29-2007, 04:35 PM	#2
Frizzle Fry Registered User Join Date: Aug 2005 Location: Hillsboro Oregon Posts: 6,449	Re: Crunch time: TH-400 or TH-350??? I wouldn't put a 350 behind a big block. I know they can be beefed up but...

05-29-2007, 06:23 PM	#3
70GMCer Senior Member Join Date: Apr 2005 Location: Joppa, Maryland Posts: 4,408	Re: Crunch time: TH-400 or TH-350??? If you do the 350 up right, you won't have any problems behind the BBC, besides, the 400 used more HP __________________ 1997 GMC Sierra Ext 1965 Mustang

05-30-2007, 12:41 AM	#4
Spray-Bomb Texas Big Wig Join Date: Jan 2007 Location: Mineola, Texas Posts: 5,620	Re: Crunch time: TH-400 or TH-350??? I think your 350 should be fine __________________ Just not low enough... ----------------------------- Sinister Killer

05-30-2007, 01:41 AM	#5
huero 1969 Short, Fleet, and Beat Join Date: Apr 2007 Location: Long Beach, Ca. Posts: 867	Re: Crunch time: TH-400 or TH-350??? The 400 is stronger but, the 350 will save you more gas.

05-30-2007, 06:22 AM	#6
GREASEMONKEY72 Registered User Join Date: Aug 2006 Location: Bakersfield,CA Posts: 7,893	Re: Crunch time: TH-400 or TH-350??? the 400 is stronger but the gears are better in the 350 and the 350 should be if done right __________________ -steven Alte Seele S.S. "Allison" '72 C/10 LWB 350SB/TH350 - DD PITBULL IS NOT A CRIME

05-30-2007, 08:17 AM	#7
OLDIRON69 Registered User Join Date: Mar 2007 Location: Ben Wheeler,Texas Posts: 992	Re: Crunch time: TH-400 or TH-350??? A 350 built right will hold up just fine. The guy that builds mine is over near Seven Points and it VERY reasonable. His specialty is performance trannys. __________________ 05 2500HD 6.0 excab 69 LWB-Gone but not forgotten! 68 Dodge Charger 383/727 69 Dodge Charger-440/4spd

05-30-2007, 08:53 AM	#8
BCOWANWHEELS Registered User Join Date: Nov 2006 Location: KINGSPORT,TN. Posts: 3,035	Re: Crunch time: TH-400 or TH-350??? Do Like The Factory Bbc Need A 400 Th Unless Your Not Going To Tow And Use It Like A Car.

05-30-2007, 10:27 AM	#9
Orange Licensed to Thrill! Join Date: Apr 2006 Location: Northwest, GA Posts: 1,673	Re: Crunch time: TH-400 or TH-350??? Neither. Godfather 700R4 from Mad Dog Transmissions. 888-MAD-DOGZ Usually has stuff listed on eBay, but he's not up right now for whatever reason. DLB __________________ 1971 GMC.Lowered. Overdrive. Orange. Krue's excellent FAQ Index. Last edited by Orange; 05-30-2007 at 10:30 AM.



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