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Information on a GM TH200 4R Transmission

The Turbo-Hydramatic 200 4-R was an automatic transmission with overdrive that was manufactured by General Motors. The TH200 4-R was produced and used in a variety of GM vehicles made between 1981 and 1990.

Identification

The identification tag on the TH200 4-R provides information about the transmissions production history. The first through third digits give the month and date of production. The fourth digit names the shift it was produced on. This is followed by a letter indicating the plant the transmission was made at. The TH200 4-R was manufactured at the Three Rivers and Warren, Michigan GM plants and in Windsor, Canada.

Specifications

The TH200 R-4 had a first gear ratio of 2.74-to-1 and a second gear ratio of 1.57-to-1. The third gear ratio was 1.00-to-1. The fourth gear was the overdrive with a .67-to-1 gear ratio.

Swapping TH200 4-R

The TH 200 4-R is a popular transmission to use to upgrade from an older transmission that is lacking an overdrive gear. The TH200 4-R is used by car enthusiasts to replace the earlier Powerglide and the TH350 model transmissions.

Posted by Unknown at 5:45 AM

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