Automatic Transmission Dimensions
Transmission Dimensions

 Powerglide (bellhousing pattern - Chevrolet, Fit-all)

Style A B C D E
short shaft 25 23/64 20 9/16 16 5/16 3 ¾ 19
TCI shorty 17 15/16 20 9/16 16 5/16 N/A 19
long shaft 27 9/16 20 9/16 16 5/16 3 ¾ 19

 TH350 (bellhousing pattern - Chevrolet, BOP, Fit-All)

Style A B C D E
6" tailshaft 27 11/16 21 5/8 20 3/8 3 ¾ 19 1/8
9" tailshaft 30 11/16 21 5/8 20 3/8 3 ¾ 19 1/8
12" tailshaft 33 27/32 21 5/8 20 3/8 3 ¾ 19 1/8

 TH400 (bellhousing pattern - Chevrolet, BOP)

Style A B C D E
C tailshaft 28 3/8 26 15/16 24 5/16 4 ¼ 20
D tailshaft 33 27/32 27 15/16 24 5/16 4 ¼ 20
13" tailshaft 37 7/8 27 21/32 24 5/16 1 ¾ 20

 2004R (bellhousing pattern - BOP, Fit-All)

Style A B C D E
All 27 11/16 integral tailhousing 27 3 ¾ 19 1/8

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

Style A B C D E
All except Corvette 30 ¾ 23 3/8 22 ½ 3 ¾ 20
Corvette (1982-1996) 29 7/8 23 3/8 22 ½ 3 ¾ 20

 4L60E/4L65E 1996-Later (bellhousing pattern - Chevrolet/removable)

Style A B C D E
All except Corvette & LS1/LS2 30 ¾ 23 3/16 21 ¾ 3 ¾ 18 ¼
Corvette (transaxle)
LS1/LS2-style (1998-later) 31 5/32 23 19/32 21 ¾ 3 ¾ 18 ¼

 4L80E/4L85E 1991-Later (bellhousing pattern - Chevrolet)

Style A B C D E
Std. 2wd 32 11/16 30 3/8 26 4 ¼ 20
HD 2wd 31 15/16 30 3/8 26 4 ¼ 20
HD long 33 30 3/8 26 4 ¼ 20
4 X 4 29 30 3/8 26 N/A 20

 C4 (bellhousing pattern (removable) - 4 Cylinder, Small Block, Big Block)

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

 C6 (bellhousing pattern - FE Big Block, Big Block, Small Block)

Style A B C D E
FE Big Block 33 ½ 22 3/8 20 5 ½
Big Block 33 ½ 22 3/8 20 5 ½
Small Block 33 ½ 22 3/8 20 5 ½

 AOD (bellhousing pattern - Small Block)

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

 AODE/4R70W (bellhousing pattern - Small Block, Modular)

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

 5R55S

Style A B C D E
Small Block 281/8 253/4 2411/16 N/A 1-Hole / 1-Bolt 183/4

 A-727/37RH

Style A B C D E
Small Block 34 3/8 23 ¾ 16 2 ¾ 18
Big Block 34 ½ 22 ¾ 16 2 ¾ 18 13/16

 A-904/32RH

Style A B C D E
Small Block 30 ¾ 23 14 2 3/16 17 7/8

 A-518/46RH/47RH/47RE

Style A B C D E
Small Block 16 16 5/16

 A-500/42RH/42RE

Style A B C D E
Small Block 37 24 ½ 15 7/8 3 5/8 18 1/8