Metal Steels

TH400 Steel Module

We keep this Turbo 400 steel module in stock and ready for express 1-3 day shipping direct to your transmission rebuild. 

TH400 Steel Plate Module - HD Kolene (1965-1995)

This is a heavy duty performance Kolene coated steel plate module for GM Turbo 400 transmissions that was manufactured in the USA.

TH400 Aluminum Clutch Spacer | Sonnax

Sonnax aluminum clutch spacer 34555-48 for GM TH400 transmissions is a lightweight option for reducing friction count and improving efficiency in lower-power applications. It can be used in any...

TH400 Aluminum Clutch Steel | Use w/ Sonnax 28-Spline Forward Drums

Traditional clutch packs use steel separator plates. Sonnax aluminum clutch steel 34555-44A is a lightweight upgrade for GM TH400 transmissions that reduces total clutch pack weight by about 1 lb...

4L80E TH400 HD Intermediate Clutch Backing Plate | Sonnax | .375''

TH400 4L80E Heavy Duty Intermediate Clutch Backing Plate 0.375'' Thick Sonnax Part Number: 30280-01

TH400 Intermediate Pressure Plate Extra Heavy Duty Billet Steel

TH400 Intermediate Pressure Plate Extra Heavy Duty Billet Steel The extra heavy duty pressure plate provides superior strength and durability for drag racing and extreme off-road applications. Also...

TH400 4L80E Forward Direct Wave Plate (0.060'' / 1.52mm)

TH400 4L80E Forward Direct Wave Plate (.060"/1.52mm)

TH400 Intermediate Clutch HP Kolene Steel Plate

0.099 / 2.51'' | 22-Tooth - Kolene Coated HD Performance

TH400 Intermediate Clutch Pressure Plate

This is a good used interemediate clutch pressure plate for GM's Turbo 400 automatic transmissions.

TH400 4L80E Forward Direct Steel Plate (1967-UP) 0.060''

Alto Part Number: 031701A(Old #) 031701B(New #) Steel, Fwd/Dir, 4L80E, .060"/1.52mm thick, 12 Tooth(base 14 tooth), OD 6.275", ID 4.585"

TH400 4L80E Forward Direct Clutch Steel Plate (1967-UP)

This is a high quality new replacement forward/direct clutch steel plate for GM Turbo 400 and 4L80E automatic transmissions manufactured from 1967 and up. 0.090'' / 2.34'' Thick 12/14T 4.565'' ID 8...

TH400 4L80E Forward Clutch Kolene Steel Plate .078" Thick (1965-UP)

This is a high performance Kolene coated forward clutch steel plate for GM's Turbo 400 and 4L80E automatic transmissions. .078" Thick

TH400 4L80E Forward Direct Kolene Coated Steel Plate .090" Thick (1968-UP)

This is a high performance Kolene coated forward/direct clutch steel plate for GM Turbo 400 and 4L80E automatic transmissions manufactured from 1968 and up. .090" Thick

TH400 Forward Clutch Steel Plate (1965-UP) 0.077''

This is a new forward clutch steel plate for GM's TH400 automatic transmissions manufactured from 1965 and up. 0.077" / 1.96mm Thick 14-Tooth 4.565'' ID 4 Used in typical T

TH400 Intermediate Steel Plate (1964-1990) 0.099/2.51

This is a high quality new steel plate for  Turbo 400 intermediate clutch manufactured in the USA. 0.099mm / 2.51'' Thick 22-Tooth 4.997'' ID 3-Used per typical TH400 buil

4L80E Direct Steel Plate (1991-UP)

THIS IS NOW LISTED HERE.   This is a new replacement direct clutch steel plate for 1991 and

TH400 Intermediate Clutch High Performance Powerpack

TH400 Transmission Intermediate (2nd) Clutch High Performance Powerpack Made in the USA by Alto Products Corp The 031757 kit will correct, prevent and substantially reduce the concerns of 1-2...

TH400 Intermediate Clutch Powerpack

TH400 Transmission Intermediate (2nd) Clutch Powerpack Made in the USA by Alto Products Corp The 031757 kit will correct, prevent and substantially reduce the concerns of 1-2 up-shift shudder, long...

TH400 4L80E Direct Clutch Powerpack

Turbo 400 & 4L80E Direct Clutch Performance Powerpack Made in the USA by Alto Products Corp Contents (7) 031740A (.061” / 1.54mm) Red Eagle® Friction Plates

TH400 Forward Clutch Powerpack

GM TH400 High Performance Forward Clutch Powerpack Made in the USA by Alto Products Corp Contents (6) 031740A Red Eagle® Friction Plates (.061” / 1.54mm)