Automatic Ratios Gear Ratios Transmission 1st 2nd 3rd 4th Powerglide 1.72 1:1 - - 1.82 1:1 - - TH350 2.52 1.52 1:1 - TH400 2.48 1.48 1:1 - TH700-R4 3.06 1.63 1:1 0.70 TH200-4R 2.74 1.57 1:1 0.67 4L80-E 2.48 1.48 1:1 0.75 Note that the TH700-R4 has a deeper First gear ratio that might appear to be better than the TH200-4Rs. The 700 was originally designed to compensate for use with small-displacement engines with minimal torque. The disadvantage to the deep First gear is the larger rpm drop between First and Second-46 percent. The TH200-4R First-to-Second gear spread is a slightly tighter 42 percent. For comparison, the TH350 experiences a 40 percent drop between First and Second gear. SOURCES California Performance Transmission Huntington Beach CA 800-278-2277 www.cpttransmission.com « | 1 | 2 | View Full Article Enjoyed this Post? Subscribe to our RSS Feed, or use your favorite social media to recommend us to friends and colleagues!