Thread: TH-400 Question
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Old 03-30-2024, 10:07 AM
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chiphead chiphead is offline
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Join Date: Nov 2004
Location: Aiken, SC
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Here's an example: When I bought my red car, it had 2.56 gears. It was set up to hold first gear out a little longer, and then stay in second until about 50 MPH at light throttle. The car felt like it had 3.73s until about 55MPH when it would shift out into 3rd. Reviewing the governor found stock weights, but one very light spring and one very heavy spring. Modulator set to shift at light load, loose converter and very high line pressure. It's been a real challenge to tame once I changed the rear end to 3.25 gears. I've had to go to much heavier weights and closer spring spacing to keep the 1-2 shift but lower the 2-3 shift. With the loose converter, it'll still redline at WOT before it auto shifts.

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White '67 LeMans 407/TH350/Ford 3.89... RIP
Red '67 LeMans. 407/TH400/Ford 3.25
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