Tranny Selection

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Tranny Selection

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Tranny Selection - 5/19/2008 8:25:08 PM

markfothebeast

Posts: 18
Joined: 6/3/2007
Status: offline

I don't know what tranny I should go for. I should have around 300hp with my new 350 setup. I bought a TH350c with less than 1k miles and with a shift kit but someone urged me not to use it because "the torque converter clutches would blow up into the tranny and ruin the tranny if I didnt flip the toggle switch at the right time", don't know if thats true. And I dont know how exactly to wire the switch. Anyhow he has a good condition th400 sitting around he would sell me for $300 but I read somewhere that the Th400 can rob anywhere from 30-40HP. Is there any proof that the TH400 will rob that much HP?

Post #: 1

RE: Tranny Selection - 6/17/2008 6:46:39 AM

BurninRubber92

Posts: 23
Joined: 6/16/2008
Status: offline

All automatic transmissions rob anywhere from 18-20% of engine horsepower. Manual Transmission rob 13-15%. So, either way you go, you will lose power. That''s just the way it goes. If you''re running 300 at the crank now, you should expect a 50-60hp loss through the drivetrain.

As for your transmission choice, if it has to be an automatic, i would go with a th400, or a 700r.

Have you considered doing a manual swap?

(in reply to markfothebeast)

Post #: 2

RE: Tranny Selection - 6/17/2008 8:07:44 AM

markfothebeast

Posts: 18
Joined: 6/3/2007
Status: offline

I swapped in a built-up TH350 last weekend. It was a straight forward swap from the TH200 with no modifications.

(in reply to BurninRubber92)

Post #: 3