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Post Info TOPIC: Automatic Transmission Info


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Date: Aug 23, 2009
Automatic Transmission Info
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Gear Ratios of Popular GM Transmissions

Trans           1st Gear   2nd Gear   3rd Gear   4th Gear   Reverse
Powerglide 1.76/1.82   1.00             ---             ---         1.76/1.82
TH350            2.52        1.52           1.00            ---           1.94
TH400            2.48        1.48           1.00            ---           2.07
TH200-4R       2.74        1.57           1.00         0.67           2.06
TH700-R4       3.06        1.62           1.00         0.70           2.29
4L80E             2.43        1.49           1.00         0.75          2.07


1 Aluminum Powerglide      14 bolts
2 TH200 Metric                   11 bolts
3 TH350                             13 bolts
4 TH400                             13 bolts
5 TH200-4R                        16 bolts
6 TH700-R4, 4L60, 4L60E  16 bolts
7 4L80E                             17 bolts


Identifying a TH200-4R vs. TH200

Photo of TH200-4R transmission

The TH200-4R is identified by 10 bolt holes and 2 dowel-pin locator holes on the universal bellhousing.  It has a dual bolt pattern for both Chevrolet and BOP (Buick, Olds, Pontiac) applications.  The TH200 has only six bolt holes and 2 dowel-pin holes



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