T350 or 400, opinions please - The 1947 - Present Chevrolet & GMC Truck Message Board Network

72bigred · 01-29-2009, 07:23 PM

Hi all, building my wifes 60 sb I have decided to go with a 1968 292 as I was able to pick one up for a song and a dance. I am a manual fan myself but figured I would go automatic for the wife. I orig was thinking with the fuel costs the 700r would be the way to go but after thinking about it I decided a T350 would do just fine for around town cruising.

Anyhow question is, I have a quality guy here that does nothing but 350's with stall built well I am looking at 450$.. On another note I can pick up a 400 from a guy that has fallen on hard times and has been selling off his project, 400 was built to sit behind a big block and has zero miles. He has offered it to me for 400$ with TQ.. (the stall is good for my cam)

Again I am not an automatic guy so I was looking for some input as to what I should do, the kick downs I guess are diff? What else am I in for other than the normal coolant lines ect, anything I should be looking at? Just trying to pick some brains on the topic. The real only reason I am looking at the 400 is when the wife loses interest

I will stuff a big block in the truck.

Thanks

Skez

rookierodbuilder · 01-29-2009, 08:07 PM

I've heard that the 400's are the beefier of the two. But I'm kind of like you, I don't exactly know the real differences between the two. Heres some more food for thought, most 3/4 ton trucks that had automatics ran the 400 i do believe.

72bigred · 01-29-2009, 08:16 PM

Ya, I know the gear ratios are diff, and the rear mount is a further back.. I think they are like a half inch longer and they kick down different, more common in towing/hauling dept.. just heavier duty all around, but other than that I dont know.. Thus figured someone here probably could give some insight on any experience they have had with them good/bad etc..

**Chevy Fleetside** · 01-29-2009, 08:19 PM

Lets just say the TH400 is going to take too much HP to turn with the 292. Gas Mileage will suck.

davidh · 01-29-2009, 09:02 PM

th 400 uses something like 23more hp I once heard. And my heavy duty 77 3/4 has a turbo 350, factory. I'd only run a th 400 if I had a big block.

502tripower · 01-29-2009, 09:10 PM

I would look for a 200R or 700R.

01-29-2009, 07:23 PM	#1
72bigred Registered User Join Date: Jan 2008 Location: Spokane WA Posts: 254	T350 or 400, opinions please Hi all, building my wifes 60 sb I have decided to go with a 1968 292 as I was able to pick one up for a song and a dance. I am a manual fan myself but figured I would go automatic for the wife. I orig was thinking with the fuel costs the 700r would be the way to go but after thinking about it I decided a T350 would do just fine for around town cruising. Anyhow question is, I have a quality guy here that does nothing but 350's with stall built well I am looking at 450$.. On another note I can pick up a 400 from a guy that has fallen on hard times and has been selling off his project, 400 was built to sit behind a big block and has zero miles. He has offered it to me for 400$ with TQ.. (the stall is good for my cam) Again I am not an automatic guy so I was looking for some input as to what I should do, the kick downs I guess are diff? What else am I in for other than the normal coolant lines ect, anything I should be looking at? Just trying to pick some brains on the topic. The real only reason I am looking at the 400 is when the wife loses interest I will stuff a big block in the truck. Thanks Skez

01-29-2009, 08:07 PM	#2
rookierodbuilder Registered User Join Date: Jan 2009 Location: Sharpsburg, Ky. Posts: 110	Re: T350 or 400, opinions please I've heard that the 400's are the beefier of the two. But I'm kind of like you, I don't exactly know the real differences between the two. Heres some more food for thought, most 3/4 ton trucks that had automatics ran the 400 i do believe.

01-29-2009, 08:16 PM	#3
72bigred Registered User Join Date: Jan 2008 Location: Spokane WA Posts: 254	Re: T350 or 400, opinions please Ya, I know the gear ratios are diff, and the rear mount is a further back.. I think they are like a half inch longer and they kick down different, more common in towing/hauling dept.. just heavier duty all around, but other than that I dont know.. Thus figured someone here probably could give some insight on any experience they have had with them good/bad etc.. Last edited by 72bigred; 01-29-2009 at 08:17 PM.

01-29-2009, 08:19 PM	#4
Chevy Fleetside Registered User Join Date: Sep 2006 Location: San Francisco Posts: 4,779	Re: T350 or 400, opinions please Lets just say the TH400 is going to take too much HP to turn with the 292. Gas Mileage will suck. __________________ "A man and his truck, what a beautiful thing" 65 Short Fleetside BBC 65 Long Fleetside 283 3 on the tree for now. my build thread http://www.67-72chevytrucks.com/vboa...d.php?t=259536

01-29-2009, 09:02 PM	#5
davidh Senior Member Join Date: Feb 2004 Location: Ponca city now kingfisher Oklahoma Posts: 1,221	Re: T350 or 400, opinions please th 400 uses something like 23more hp I once heard. And my heavy duty 77 3/4 has a turbo 350, factory. I'd only run a th 400 if I had a big block. __________________ Even the nicest dodge-chrysler is only 2years away from being parked outside of Section 8 housing.

01-29-2009, 09:10 PM	#6
502tripower Registered User Join Date: Jan 2008 Location: Satsop, WA Posts: 606	Re: T350 or 400, opinions please I would look for a 200R or 700R. __________________ 1963' Chev Custom Cab 502, 67' 435hp 3X2 intake, 9" 4:30 Posi 1961 Impala SS 348/350 4-speed 3:70 Posi 1961 Bel-Air Bubble Top 283 Turboglide soon to have a 348 3X2 4-speed 1950 17' Fairliner twin cockpit barrel stern 312 Y block 1X1 intake Borg Warner 1:1 gear 1957 Fleetform 14' twin cockpit barrel stern 1969 BP-125 Merc 1949 Transitier 3-wheel forklift Crosley 4-Banger 98' FXD 2002 2500HD



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