4r70w Best year?? - TCCoA Forums
 
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post #1 of 6 (permalink) Old 11-09-2006, 10:01 AM Thread Starter
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4r70w Best year??

~~Hello

I need a good 4r70w to fit my 351W. WE race in a Oval track car. The plan is to use no shift computer. We need 2nd. & reverse + maybe 1st.

I know it must be from a 3.8

The second Question is what Torque Converter must I use to get about 6500+ RPM? What weight Flex plate? the 28oz.?

Paul

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1990 Thunderbird Circle Track Street Stock
351W 2bbl.
C-4 Auto
3.90 open rear
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post #2 of 6 (permalink) Old 11-09-2006, 10:25 AM
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No stock converter will fit that 351 and handle 6500 rpm. I would get the latest
4r70w you can find. A 4.2 truck will work as well as a 3.8 mustang.
Alan

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post #3 of 6 (permalink) Old 11-09-2006, 10:42 AM Thread Starter
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Converter

~~Hello

What would it cost for a converter for a 4R70W to fit my 351W with about 2500-2800 stall?

Paul

Paul [email protected]
1990 Thunderbird Circle Track Street Stock
351W 2bbl.
C-4 Auto
3.90 open rear
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post #4 of 6 (permalink) Old 11-09-2006, 11:52 AM
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They aren't cheap. If you don't plan on using lockup we could do something different and shed some weight and cost. I generally wouldn't suggest that because I feel that lockup is one of the best parts of these transmissions.
Alan

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post #5 of 6 (permalink) Old 11-09-2006, 01:21 PM Thread Starter
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Lock-up

~~Hello

Can lock-up be achieved in 2nd. gear? This would be an advantage.

Paul

Paul [email protected]
1990 Thunderbird Circle Track Street Stock
351W 2bbl.
C-4 Auto
3.90 open rear
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post #6 of 6 (permalink) Old 11-09-2006, 02:44 PM
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Yes, and Yes

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