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Going from TH700R to Manual on a daily driver, stock HP - which one?

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Old 04-04-2019, 08:33 AM
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Car: 1989 IROC Convertible
Engine: 350 TPI L98
Transmission: WC T5
Axle/Gears: 3.42
Going from TH700R to Manual on a daily driver, stock HP - which one?

T5 or T56 or ?

Pluses and minuses of each?
Old 04-04-2019, 09:34 AM
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Car: 88 IROC-Z
Engine: 6.9L TPI(FIRST) 421ci
Transmission: T56
Axle/Gears: Ford 9" Eaton truetrac 3.50
Re: Going from TH700R to Manual on a daily driver, stock HP - which one?

What size motor? How much do you want to spend?

Also do you have the tools to tune it after the swap?

Last edited by TORN; 04-04-2019 at 10:13 AM.
Old 04-04-2019, 06:45 PM
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Join Date: Aug 2009
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Car: 1989 IROC Convertible
Engine: 350 TPI L98
Transmission: WC T5
Axle/Gears: 3.42
Re: Going from TH700R to Manual on a daily driver, stock HP - which one?

I want to spend as little as possible but want it to work perfectly. It's a stock 89 LB9 (TPI).
Old 04-06-2019, 08:39 AM
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Car: 1990 & 1991 Firebird Formula 350's
Engine: 350 ci
Transmission: T 5 & 700r4
Axle/Gears: 3:23 & 3:27
Re: Going from TH700R to Manual on a daily driver, stock HP - which one?

T-5. easiest conversion.
Old 04-06-2019, 03:38 PM
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jmd
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Car: `86 SS / `87 SS
Engine: L69 w/ TPI on top / 305 4bbl
Transmission: `95 T56 \ `88 200-4R
Re: Going from TH700R to Manual on a daily driver, stock HP - which one?

Use your local resources to pick up everything from a parts car. 88-92 WC T5 from a 305 car, the pedals, switches, and pigtails, 88-89 PROM (will need to !VATS) and when you're all done, keep the TCC wiring from burning on the exhaust.

Stock stuff works and would meet you needs. A 2.66 / 0.50 T56 is not what you will want to drive with a 305 and 3.42 rear. The only offset of T56 cost is fuel savings w a possibly taller 6th, so along your goals, keep it simple as stock.
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