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B&M TH700-R4 Throttle Valve Sleeve
Product images may differ from actual product appearance.
TH700 transmissions will downshift from fourth to third gear when there's more than half throttle (except Corvette and some Camaro/Firebird) so it's impossible to cruise at high speeds in overdrive (fourth). This sleeve prevents a forced part-throttle kickdown from fourth to third gear and allows cruising in overdrive at higher speeds. The transmission will only kick down from fourth to third at 3/4 throttle.
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