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Chevrolet Transmission Dimensions

Dimension "C" is the distance from the bellhousing to the center of the transmission mounting pad. Note: The mounting pad is usually a part of the extension housing, but the graphic shows it on the maine case. this means that dimension "C" is usually longer than dimension "B".

Powerglide (bellhousing pattern - Chevrolet, Fit-all)

Style A B C D E
Short shaft 25 23/64" 644,1 mm 16 5/16" 414,3 mm 20 9/16" 522,3 mm 3 3/4" 95,3 mm 19" 482,6 mm
Shorty 17 15/16" 439,7 mm 16 5/16" 414,3 mm 20 9/16" 522,3 mm N/A N/A 19" 482,6 mm
Long shaft 27 9/16" 700 mm 16 5/16" 414,3 mm 20 9/16" 522,3 mm 3 3/4" 95,3 mm 19" 482,6 mm

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

Style A B C D E
6" tailshaft 27 11/16" 703,3 mm 21 5/8" 549,3 mm 20 3/8" 517,5 mm 3 3/4" 95,3 mm 19 1/8" 485,8 mm
9" tailshaft 30 11/16" 779,5 mm 21 5/8" 549,3 mm 20 3/8" 517,5 mm 3 3/4" 95,3 mm 19 1/8" 485,8 mm
12" tailshaft 33 27/32" 859,6 mm 21 5/8" 549,3 mm 20 3/8" 517,5 mm 3 3/4" 95,3 mm 19 1/8" 485,8 mm

TH400 (bellhousing pattern - Chevrolet, BOP)

Style A B C D E
4" tailshaft 28 3/8" 720,7 mm 24 5/16" 617,5 mm 26 15/16" 684,2 mm 4 1/4" 108 mm 20" 508 mm
9" tailshaft 33 27/32" 859,6 mm 24 5/16" 617,5 mm 27 15/16" 709,6 mm 4 1/4" 108 mm 20" 508 mm
13" tailshaft 37 7/8" 962,0 mm 24 5/16" 617,5 mm 27 21/32" 702,5 mm 1 3/4" 44,5 mm 20" 508 mm

TH200-4R (bellhousing pattern - BOP, Fit-all)

Style A B C D E
All 27 11/16" 703,3 mm integral tailhousing 27" 685,8 mm 3 3/4" 95,3 mm 19 1/8" 485,8 mm

TH700-R4 /4L60 (bellhousing pattern - Chevrolet)

Style A B C D E
All except
Corvette
30 3/4" 781,1 mm 23 3/8" 593,7 mm 22 1/2" 571,5 mm 3 3/4" 95,3 mm 20" 508 mm
Corvette
(1982-1992)
29 7/8" 759 mm 23 3/8" 593,7 mm 22 1/2" 571,5 mm 3 3/4" 95,3 mm 20" 508 mm
With Th350
6" tailshaft
29 1/2" 749,3 mm 23 3/8" 593,7 mm 22 1/2" 571,5 mm 3 3/4" 95,3 mm 20" 508 mm
* See note 30 1/2" 774,7 mm 23 3/8" 593,7 mm 28" 711,2 mm 3 3/4" 95,3 mm 20" 508 mm

* An extension housing p/n 8673406 (old p/n 24214689) is available for the TH700R4/4L60 transmission that moves the rear transmission mount to the same position as a TH400 (short-style 4" tail) or TH200-4R transmission. This 7-3/8" long extension housing can eliminate transmission crossmember modifications when replacing a TH400 or TH200-4R transmission with a 4L60 assembly.

4L60E (bellhousing pattern - Chevrolet/removable)

Style A B C D E
All 1993-'95
exept Corvette
30 3/4" 781,1 mm 23 3/8" 593,7 mm 22 1/2" 571,5 mm 3 3/4" 95,3 mm 20" 508 mm
Corvette,
1993-'95
29 7/8" 759 mm 23 3/8" 593,7 mm 22 1/2" 571,5 mm 3 3/4" 95,3 mm 20" 508 mm
Corvette
(transaxle)
1996-up
N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
All 1996-up
exept Corvette
and LS1
30 3/4" 781,1 mm 21 3/4" 552,5 mm 23 3/16" 589 mm 3 3/4" 95,3 mm 18 1/4" 463,6 mm

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

Style A B C D E
LS1,
1998-up
31 5/32" 791,4 mm 21 3/4" 552,5 mm 23 19/32" 599,3 mm 3 3/4" 95,3 mm 18 1/4" 463,6 mm

4L80E 1991-Later (bellhousing pattern - Chevrolet)

Style A B C D E
std. duty
2WD
32 11/16" 830,3 mm 26" 660,4 mm 30 3/8" 771,5 mm 4 1/4" 108 mm 20" 508 mm
heavy duty
2WD
31 15/16" 811,2 mm 26" 660,4 mm 30 3/8" 771,5 mm 4 1/4" 108 mm 20" 508 mm
heavy duty
long
33" 838,2 mm 26" 660,4 mm 30 3/8" 771,5 mm 4 1/4" 108 mm 20" 508 mm
4WD 29" 736,6 mm 26" 660,4 mm 30 3/8" 771,5 mm N/A N/A 20" 508 mm

6L80E 2006-Later (w/ removable bellhousing)

Style A B C D E
  29 1/4" 742,95 mm     25 3/4" 654,05 mm        

6L90E 2006-Later (w/ removable bellhousing)

Style A B C D E
  30 1/2" 774,7 mm     27 1/2" 698,5 mm        

Splines (output shaft)    Pan Bolts (number of)

Type Output Splines Pan Bolts
Alu. Powerglide (up to -63) 16 splines 14 pcs
Alu. Powerglide (from -64) 27 splines 14 pcs
TH350 27 splines 13 pcs
TH400 32 splines 13 pcs
TH200-4R 27 splines 16 pcs
TH700-R4, 4L60, 4L60E 27 splines 16 pcs
4L80E 32 splines 17 pcs
6L80E 31 splines 18 pcs
6L90E 36 splines 18 pcs

Chevrolet Transmission Ratios

Transmission Ratios 1st to 2nd
Ratio Drop
1st Gear 2nd Gear 3rd Gear 4th Gear
OD
Turbo 350 1.00 2.52 1.52 1.00 N/A
Turbo 400 1.00 2.48 1.48 1.00 N/A
200-4R 1.17 2.74 1.57 1.00 0.67
700R4 / 4L60E with PATC close ratio gear set.
Low geared 1st with 11,72% less 1st to 2nd
RPM drop than the wide ratio gear set.
This is the same ratio as a 4R70W transmission.
1.28 2.84 1.56 1.00 0.70
700R4 1.43 3.06 1.63 1.00 0.70
4L80E 1.00 2.48 1.48 1.00 0.75
Transmission Ratios 1st to 2nd
Ratio Drop
1st Gear 2nd Gear 3rd Gear 4th Gear 5th Gear 6th Gear
6L80E / 6L90E N/A 4.030 2.360 1.530 1.150 0.850 0.670

Transmission Fluid Capacity (see also capacity of fluid in the converter here)

Transmission (stock pan) Number of Qts/L
Powerglide, TH350 (without converter) 4 qts / 3,8 L
TH400, TH200-4R, TH700-R4, 4L60, 4L60E (without converter) 6 qts / 5,7 L
4L80E (without converter) 7,7 qts / 7,3 L
6L80E Fluid capacity with 258 mm converter 10,3 qts / 9,7 L
6L80E Fluid capacity with 300 mm converter 12,6 qts / 11,9 L
6L90E Fluid capacity with 300 mm converter 13,8 qts / 13 L

Designed by HD