Best Trans for Street for BBC 496 410's Rear

Old 01-04-2017, 12:50 PM
  #1  
sbc421truck
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Default Best Trans for Street for BBC 496 410's Rear

Any recommendations for a full Manuel Automatic
Th-350/Th400?
10:1 BBC 496
580 HP 610 TQ
[email protected] solid roller
410 rear.
In 3700 LB C10 Blazer.
Keeps breaking cases from Hughes and TCI-stock cases.
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Old 02-05-2017, 09:53 AM
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Swiley383
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Is everything correctly lined up? Breaking cases would make me suspect to something not being correctly in line.
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Old 12-10-2018, 07:15 PM
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stevesolo16
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Was the company you purchased the tranny from installing new cases or just welding the broken one?
Swiley383 is correct referring to misalignment or a bent component. I had a case with a misalignment and
it cracked the outer case. No matter what I did I couldn't make it work to my liking and finally replaced the case.
As far as what trans is correct for you? In a 3700 pound car, with 580hp I most definitely stick to a 3 speed.
A TH400 is built for heavier cars. If you decide to up the HP the TH400 can handle everything you can throw
at it. There are some good high-performance transmission shops out there and building a TH400 to handle 2500hp+
isn't unheard of. Good luck!
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