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| Description |
| These upshift kits from Bowtie Overdrives are designed to provide wide-open throttle 3 to 4 upshifts for TH-700R4 (4L60) transmissions. Most TH-700R4 transmissions will downshift from fourth to third gear at about 3/4 throttle. This allows the transmission to remain in fourth gear at full throttle. |