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Transmission Measurements

 TH-350 (bellhousing pattern - Chevrolet, BOP, Fit-All)

Style A B C D E
6" tail 27 11/16 21 5/8 20 3/8 3 3/4 19 1/8
9" tail 30 11/16 21 5/8 20 3/8 3 3/4 19 1/8
12" tail 33 27/32 21 5/8 20 3/8 3 3/4 19 1/8

 

 TH-400 (bellhousing pattern - Chevrolet, BOP)

Style A B C D E
4" tail 28 3/8 24 5/16 26 15/16 4 1/4 20
9" tail 33 27/32 24 5/16 27 15/16 4 1/4 20
13" tail 37 7/8 24 5/16 27 21/32 1 3/4 20

 

 200-4R (bellhousing pattern - BOP, Fit-All)

Style A B C D E
All 27 11/16 no tailhousing 27 3 3/4 19 1/8

 

 700-R4 4L60 (4L60E 1993-1995) (bellhousing pattern - Chevrolet)

Style A B C D E
All except Corvette 30 ? 23 3/8 22 1/2 3 3/4 20
Corvette (1984-1996) 29 7/8 23 3/8 22 1/2 3 3/4 20

 

 4L60E 1996-Later (bellhousing pattern - Chevrolet/removable)

Style A B C D E
All except Corvette 30 3/4 21 3/4 23 3/16 3 3/4 18 1/4
Corvette (transaxle)       N/A N/A

 

4L60E / 4L65E 1997-Later (w/ removable bellhousing) All LS1 Type

Style A B C D E
All except Corvette 31 5/32" 21 3/4 23 19/32" 3 3/4 18 1/4

 

4L80E 1991-Later (bellhousing pattern - Chevrolet)

Style A B C D E
Std. 2wd 32 11/16 26 30 3/8 4 1/4 20
HD 2wd 31 15/16 26 30 3/8 4 1/4 20
HD long 33 26 30 3/8 4 1/4 20
4 X 4 29 26 30 3/8 N/A 20

 

 C-4 (bellhousing pattern (removable) - 4 Cylinder, Small Block, Big Block)

Style A B C D E
Pan Fill 24 5/16 16 3/4 19 1/2 5 9/16 N/A
Case Fill  30 19/32  18 1/8  20 1/2 5 9/16 N/A
CF w/ PF conv.       5 9/16 N/A

 

 C-6 (bellhousing pattern - FE Big Block, Big Block, Small Block)

Style A B C D E
FE Big Block 33 1/2 20 22 3/8 5 1/2  
Big Block 33 1/2 20 22 3/8 5 1/2  
Small Block 33 1/2 20 22 3/8 5 1/2  

 

 AOD (bellhousing pattern - Small Block)

Style A B C D E
Small Block 30 3/8 20 3/16 22 5/16 5 5/16 19 9/16

 

 AODE (bellhousing pattern - Small Block)

Style A B C D E
Small Block 31 3/16 21 23 5/16 5 5/16 19 3/8
 

 

 Powerglide (bellhousing pattern - Chevrolet, Fit-all)

Style A B C D E
short shaft 25 23/64 16 5/16 20 9/16 3 3/4 19
shorty 17 15/16 16 5/16 20 9/16 N/A 19
long shaft 27 9/16 16 5/16 20 9/16 3 3/4 19

 

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