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04-02-2002, 10:36 PM
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#1 |
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Registered User
Join Date: Mar 2002
Location: ND USA
Posts: 122
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TH350 vs TH400
What exactly are the differences in a turbo350 and a turbo400 transmission??????
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04-02-2002, 10:38 PM
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#2 |
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its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,690
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Size, weight, durability, langth, the way they are operated... completly differant animals.
------------------ '69 G.M.C. 350/350. Trying to clean up the left over damage from the Dope-Smokin-Old-Man I've been dubbed the Longhorn Freak/Fanatic/Expert, I just hope I can live up to it. FINALLY got the HORNIAC...a '70 one ton Longhorn with a Pontiac 350/350 and lots of 'personality'. Check out The Longhorn Webite. If you need a pic posted, E-mail me at longhornmail@yahoo.com Andy, in Columbus Ohio |
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04-02-2002, 10:39 PM
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#3 |
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Registered User
Join Date: Mar 2002
Location: ND USA
Posts: 122
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Which would be best in a 71 3/4 ton 4X4???
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04-02-2002, 10:41 PM
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#4 |
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Registered User
Join Date: Aug 2001
Location: rock island,il,usa
Posts: 5,382
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400 turbo.....hands down!
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http://community.webshots.com/user/hotrodhorn |
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04-02-2002, 10:42 PM
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#5 |
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Registered User
Join Date: Mar 2002
Location: ND USA
Posts: 122
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Anybody else????
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04-02-2002, 10:44 PM
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#6 |
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computer illiterate
Join Date: Jan 2001
Location: Des Moines, IA
Posts: 6,440
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turbo 400
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72 2wd blazer 72 swb 4x4 |
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04-02-2002, 10:45 PM
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#7 |
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Registered User
Join Date: May 2001
Location: rienzi,ms.usa
Posts: 75
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i would think that it would depend on who and how it was built....jv....my 2 cents.........
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1972 swb, 400 sbc, 1978 malibu classic,305 balanced and bluprinted flowmasters,2 1/2 exhaust,pulleys,k/n 4" power filter,750 edelbrock carb,plus lots more...... RIENZI,MS ...just southeast of Memphis... |
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04-02-2002, 10:45 PM
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#8 |
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Registered User
Join Date: May 2001
Location: rienzi,ms.usa
Posts: 75
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i would think that it would depend on who and how it was built....jv....my 2 cents.........
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1972 swb, 400 sbc, 1978 malibu classic,305 balanced and bluprinted flowmasters,2 1/2 exhaust,pulleys,k/n 4" power filter,750 edelbrock carb,plus lots more...... RIENZI,MS ...just southeast of Memphis... |
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04-02-2002, 10:47 PM
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#9 |
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its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,690
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A 400 is bulit proof, but eats up horse power.
A 350 can be built as strong, and uses less power. ------------------ '69 G.M.C. 350/350. Trying to clean up the left over damage from the Dope-Smokin-Old-Man I've been dubbed the Longhorn Freak/Fanatic/Expert, I just hope I can live up to it. FINALLY got the HORNIAC...a '70 one ton Longhorn with a Pontiac 350/350 and lots of 'personality'. Check out The Longhorn Webite. If you need a pic posted, E-mail me at longhornmail@yahoo.com Andy, in Columbus Ohio |
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04-02-2002, 10:48 PM
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#10 |
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Registered User
Join Date: Mar 2002
Location: ND USA
Posts: 122
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Has anyone replaced a stock TH350 with a TH400 in a 3/4 ton 4X4 and if so how much modification if any is needed
Thanks |
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04-02-2002, 10:56 PM
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#11 |
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Registered User
Join Date: Mar 2002
Location: ND USA
Posts: 122
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ttt
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04-03-2002, 01:53 AM
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#12 |
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Recovering Truck Driver
Join Date: Mar 2002
Location: Orleans, NE USA
Posts: 1,883
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the 400's get my vote, the old man's got an 84 3/4 to 4x4 with a 350 and TH400, that tranny's been hot enough twice to melt the spedo cable off and those were the only 2 times he changed the fluid, it's outlived 3 engines and has over 300,000 mi on it, and 200,000 of those were pulling a 7x24 gooseneck stock trailer hauling cows, horses, and whatever else you could put in a trailer. Like longhornmail said, "bulletproof"
------------------ '72 Chevy 1/2T 4x4 shortbox stepside 350/350auto on '84 ralleys and 31/10.5s 67 Cutlass convertible 330, 3spd stick 90 GMC Jimmy 350/auto Chad Stephens Orleans,NE
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67 K-20 350, SM465, Eaton rear, 4.56 no spin option 00 Dodge 2500 4x4, 24V cummins, 5 speed Chad South Central Nebraska |
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04-03-2002, 08:12 AM
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#13 |
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Registered User
Join Date: Feb 2000
Location: Center City, MN, USA
Posts: 3,254
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To replace a TH350 with a Th400 you'll need a different transfer case and adapter OR the correct 400 adapter and a different input gear in the case you have (assuming you have a NP205). The 400 stuff is WAY harder to find. If you already have a 350, adapter, and transfer case I would rebuild the 350, get an external cooler, and install a temperature guage.
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'70 cab, '71 chassis, 383, TH350, NP205. '71 Malibu convertible '72 Malibu hard top Center City, MN |
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04-03-2002, 09:42 AM
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#14 |
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Registered User
Join Date: Aug 2001
Location: Long Beach, Ca
Posts: 1,432
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Turbo 350 has a high first gear which works best for off the line power. You can build a 350 to be very stong and 350's are more available in a 4x4 setup.
------------------ 71 basic C-10 350. The only option is the rust.No nothing on it, but thats all about to change. <A HREF="http://www.geocities.com/stevemau/slam33page.html?1004806705410 " TARGET=_blank>http://www.geocities.com/stevemau/slam33page.html?1004806705410 </A>
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71 LWB 350/350still working on it but it's going tp be sweet. www.geocities.com/stevemau/slam33page.html " TARGET=_blank>http://www.geocities.com/stevemau/slam33page.html?1004806705410 </A> |
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04-03-2002, 10:28 AM
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#15 |
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Registered User
Join Date: Jan 2002
Location: Lemon Grove, California
Posts: 152
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I have a 71 3/4 ton 4x4 Chevy. I too looked
into the 400. Too much money and hassle. If you already have the stock set up as far as transfer case and adapter,rebuild 350 to heavy duty parts and specs and you will be amazed how much that 350 can handle.Even behind a big block, if that's your pleasure! |
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04-03-2002, 10:55 AM
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#16 |
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Shortbox wanna-be.
Join Date: Mar 2002
Location: Fort St.John, British Columbia, Canada
Posts: 773
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I'm a hands-down T400 fan. But just out of experience, I had a '81 Chevy 4x4 with 35" mudders on it. I had that thing burried more times than I can remember. This truck had the T350 in it, and bone stock to boot. That tranny lasted me 9 years!! So don't be scared of it, if that is what you already have. Like stated above, have it rebuilt with good parts, and you will have no problems with it.
Reid ------------------ Sylvan Lake, Alberta, Canada 1970 Chevy C20 Custom Camper #s matching 402BB Turbo 400 trans. Air conditioning, power steering, manual brakes. 73,600 Original Miles!! (Add on 2000 more from raod trip!)
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1970 Chevy C20 Custom Camper 402BB Turbo 400 trans. (Slowly becoming a '70 shortbox 1/2 ton) '71 Camaro SS 402/T400 resto '97 Z28 (11.41@127MPH) 
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04-03-2002, 11:00 AM
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#17 |
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Senior Member
Join Date: Nov 2001
Location: Pasadena, Texas, USA
Posts: 1,005
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I say go with the TH350, it can be built bulit proof and it does not take as much HP to turn it.
Sam
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72 LWB chevy truck. Pasadena, Texas |
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04-03-2002, 01:17 PM
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#18 |
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Registered User
 
Join Date: Feb 2001
Location: East Central, MO
Posts: 11,336
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This may be long but gotta tell ya what a friend of mine told me, who is a machinest, drag races/ pro stock/big block chevys. Another friend with a jeep/bigblock chevy 800hp was blowing 400turbos left and right. I was telling Fuzzy htis and he said the guy should get a 350 turbo and build it. He said the 350 for some things are stronger, I think like low end torque. I have always had 350's and never had any problems with any of them. Mine is beefed up with some 400 turbo stuff. Shifts like it has a shift kit and it doesn't. Fuzzy is very smart, a low budget racer, takes tranny apart after every race day and experiments with things.
------------------ 67 stepside 4x4 Owensville MO mudder67@hotmail.com |
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