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October 4th, 2009, 12:06 PM
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#1 (permalink) |
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Registered User
Join Date: May 2009
Posts: 7
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TH 350 OR TH400
I have 71 cutlass s with a 350/th350. I just got a 1970 455 engine and would like to know if the th350 will hold up or do I need a th400.
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October 4th, 2009, 03:21 PM
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#2 (permalink) |
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Registered User
Join Date: Jun 2009
Location: San Jose, CA
Posts: 453
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It can be made to, but if it's stock it's not going to hold for long it you get on it at all.
__________________
Randy 1970 442 
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October 4th, 2009, 06:34 PM
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#3 (permalink) |
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Seasoned beater pilot.
Join Date: Jan 2007
Location: Chicago
Posts: 2,696
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For some field data,
I've been running a th350 for 2 race seasons behind my 455, no problems yet. It's a stock 71 cutlass th350 trans, and the car runs 13.1 However F-85 on this board blew up 2 th350's with his 455 that runs 12.8. If you're going to run one, run an old one. The 1975 and later ones don't seem to hold up as well.
__________________
 I'd rather have a numbers matching poker hand.
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October 5th, 2009, 07:45 AM
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#4 (permalink) |
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Landyacht Club President
Join Date: Jul 2007
Location: Lawton, OK
Posts: 4,286
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If you are removing the 350 to install a 455 then just put in a TH 400 while you are at it. Better to be safe than sorry.
__________________
Ferris, my father loves this car more than life itself... Apparently, you don't understand! Ferris, he never drives it! He just rubs it with a diaper! Cameron Frye Ferris Bueller's Day Off 1986 |
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October 5th, 2009, 04:52 PM
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#5 (permalink) |
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Registered User
Join Date: May 2009
Posts: 7
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Thanks for the info guys. I think I will overhaul the th350 with a performance kit and try that. I dont drag only the occasional burn out.hopefully it will be ok if not I guess Ill need a 400.
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October 5th, 2009, 06:31 PM
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#6 (permalink) | |
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Seasoned beater pilot.
Join Date: Jan 2007
Location: Chicago
Posts: 2,696
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Quote:
__________________
I'd rather have a numbers matching poker hand.
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October 5th, 2009, 06:43 PM
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#7 (permalink) | |
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Registered User
Join Date: Aug 2007
Location: Yorkville,il
Posts: 279
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Quote:
It was 3 th350s 
__________________
1964 4DR F-85 455 1964 Olds Super 88 394 (sold to my buddy) 1958 International A-100 Project |
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October 5th, 2009, 08:01 PM
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#8 (permalink) | |
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Just an Olds Guy
Join Date: Jul 2008
Location: Edmonton, AB
Posts: 1,166
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Quote:
__________________
Allan R 
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