The 700R4 case requires an adapter behind non-Chevy blocks. 1st gear ratio: 2.52 to 1 2nd gear ratio: 1.52 to 1 3rd gear ratio: direct drive, i.e., 1.0 to 1 Reverse: 2. The TH200-4R case has a dual bolt pattern that fits Chevy, as well as all B-O-P V-8 blocks.the Turbo 350 transmission can be found in a variety of vehicles. The 200-4R is free of such nonsense and is ready for big-block overdrive blasting with only minor beefing. G Force RCNV-350 Transmission Crossmember, 1962-1967 Nova, GM-1. GM designed the 700-R4 valve body to prevent overdrive access at full throttle to ensure survival.The overdrive ratio-0.70 for the 700-R4, 0.67 for the 200-4R-is virtually identical, but the 200-4R offers a better ratio spread (2.74, 1.57, 1:1, 0.67) that reduces rpm drops during gear changes.I have a 71 Lark with 350 motor and 350 trans running 11.90s at 3900 lbs, only trans problem was bad torque. I don't know his horsepower or torque but his 455 was making good power and lifting the front wheels every launch. The 200-4R's 2.74 ratio makes more sense for V-8s where low-end torque is in good supply. A few yeas ago Randy New held the G/SA record in a 72 GS using a 350 transmission. The 700-R4's 3.06 First-gear ratio is a little too much of a good thing for most applications.The Turbo 350, known by the name TH350, was used in nearly all GM rear wheel drive car and truck applications during its tenure. The maximum torque that this transmission could handle varied depending on the application to which it was being applied. One of the weaknesses noted about this transmission was wobble of the direct clutch drum. It shares the same 26 -3/4 inch face-to-mount distance as the short-tail TH400, so it'll bolt right up to the TH400 transmission crossmember. This transmission replaced the GM Powerglide automatic transmission, which was a 2 speed automatic transmission that was in production for 23 years. This transmission is also known for being strong and versatile, in addition to being quite compact.If you swap it for a 28 -inch short-tail TH400, just change yokes, and the original driveshaft fits.By contrast, the 700-R4 measures 30-3/4 inches and generally requires a custom-length driveshaft. At 27-3/4 inches, it's the same length as a Powerglide or short-tail TH350 so swappers can reuse the driveshaft without modifications.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |