1982 - 2024 GM Torque Converter (3T40, THM125C Transmissions)

Top View of: GM 3T40, THM125C Torque Converter (1982 - 2024).
Top View of: GM 3T40, THM125C Torque Converter (1982 - 2024). Bottom View of: GM 3T40, THM125C Torque Converter (1982 - 2024).
PNH Number: 4807, Years: 1982 - 2024
Make / Model: GM -
Transmission: 3T40, THM125C

The PNH Difference: High Quality & Dependability

We are true torque converter professionals. We do not just cut open used converters and weld them back together and call it good enough. If you want hasty, cheap, low quality converters—then PNH is NOT for you. Show More

How PNH Brings Relentless Quality to your Torque Converter:

  • Every single torque converter processed in our facility goes through an exhaustive checkpoint protocol to find EXACTLY why it failed.
  • Next, we implement numerous corrective actions to fix common failure points for each specific model. We see more torque converters in a single day than most competitors see in a year; which gives us a tremendous amount of insight and statistics to fully understand OEM design flaws. In addition to failure point corrections, we get to the root cause of the problems and implement changes so your torque converter lasts.
  • Converters are then thoroughly rebuilt with all the new and necessary corrective actions in place; ensuring future breakdowns don’t occur!
  • Precision is not just our name, it is what we do. The tolerances that we maintain during the rebuild process ensure you are getting the best of the best.
  • Our facility sets the bar on technology and process flow. Every single converter is built to exceed your expectations. Brand new components, high production efficiencies, so you get more for less.

When you get a torque converter from Precision of New Hampton, you are not getting "just" a torque converter! You are getting the BEST of the BEST!

Find out why we are the largest torque converter manufacturer in the USA.

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Precision of New Hampton Performance Division Precision of New Hampton Performance Division

We are more than just OEM reman, we have a dedicated High Performance team that knows how to build converters that can handle as much horsepower as you can throw at it. If you want to finish first, let PNH’s Performance Division build you a state of the art torque converter. Show More

It is no coincidence why most first place race champions use PNH. Even though we build more billeted converters than anyone in the world, each converter is built to your exact specifications. If you know exactly what you want, we can do it. If you are not sure what you want, we can help make decisions for you to ensure your torque converter is going to hold up to your application.

Making performance converters takes both science and art. We have honed our craft; converters made in the High Performance Division of PNH are technological masterpieces. We understand the smallest nuances of your converter are relevant to your transmission build. And, we craft each performance converter to seamlessly transfer all the raw power of your engine. The result, like most racing professionals will tell you, is world-class speed and performance.

We know what it takes to get it right. Find out why Precision of New Hampton is the longest standing converter manufacturer in the industry. Get in touch with us, we’d love to hear from you!

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We can accommodate large orders that you may have. With over 1 million torque converters in our stock, we are sure to have what you need, when you need it. We want to show you why we are the world’s largest torque converter manufacturer.

Large orders may also qualify for a discount.

Our friendly, knowledgeable sales staff is here to work with you to handle your order. For bulk orders, please contact us.

Standard Features & Upgrades

Available Features & Upgrades

  • High Performance Friction Material
  • Furnace Brazed Impeller
  • Furnace Brazed Turbine
  • Heat Treated Sprags
  • Hardened Steel Hub
  • Turbine-Spline Reinforcement
  • Machined Forged Apply Piston
  • Furnace Brazed
  • Professional Computer Balancing
  • Extreme Clutch Upgrade
  • Flanged Impeller Hub
  • Anti-Ballon Plate
  • Multiple Clutch Options
  • Billeted Steel Cover
  • Billeted Turbine Hub
  • Extremely Tight Tolerances
Converter Stats & Specs

Torque Converter Specifications (Part #: 4807)

Manufacturer
General Motors 
Model / Engine
 
Transmissions
3T40, THM125C 
Diameter:
10.000 
Pilot:
0.824 
Input Splines:
27 
Ring Gear Teeth:
 
Lock Up:
YES 
Hub Type:
no drive w/ bushing hub 
OAH:
4.125 
Bolt Circle:
9.500 
Mounting Type:
3 rect. pads 
Thread:
Codes:
 
Comments:
w/bushing. 
Applicable Vehicles
  • 1982 General Motors (Transmissions: 3T40, THM125C)
  • 1983 General Motors (Transmissions: 3T40, THM125C)
  • 1984 General Motors (Transmissions: 3T40, THM125C)
  • 1985 General Motors (Transmissions: 3T40, THM125C)
  • 1986 General Motors (Transmissions: 3T40, THM125C)
  • 1987 General Motors (Transmissions: 3T40, THM125C)
  • 1988 General Motors (Transmissions: 3T40, THM125C)
  • 1989 General Motors (Transmissions: 3T40, THM125C)
  • 1990 General Motors (Transmissions: 3T40, THM125C)
  • 1991 General Motors (Transmissions: 3T40, THM125C)
  • 1992 General Motors (Transmissions: 3T40, THM125C)
  • 1993 General Motors (Transmissions: 3T40, THM125C)
  • 1994 General Motors (Transmissions: 3T40, THM125C)
  • 1995 General Motors (Transmissions: 3T40, THM125C)
  • 1996 General Motors (Transmissions: 3T40, THM125C)
  • 1997 General Motors (Transmissions: 3T40, THM125C)
  • 1998 General Motors (Transmissions: 3T40, THM125C)
  • 1999 General Motors (Transmissions: 3T40, THM125C)
  • 2000 General Motors (Transmissions: 3T40, THM125C)
  • 2001 General Motors (Transmissions: 3T40, THM125C)
  • 2002 General Motors (Transmissions: 3T40, THM125C)
  • 2003 General Motors (Transmissions: 3T40, THM125C)
  • 2004 General Motors (Transmissions: 3T40, THM125C)
  • 2005 General Motors (Transmissions: 3T40, THM125C)
  • 2006 General Motors (Transmissions: 3T40, THM125C)
  • 2007 General Motors (Transmissions: 3T40, THM125C)
  • 2008 General Motors (Transmissions: 3T40, THM125C)
  • 2009 General Motors (Transmissions: 3T40, THM125C)
  • 2010 General Motors (Transmissions: 3T40, THM125C)
  • 2011 General Motors (Transmissions: 3T40, THM125C)
  • 2012 General Motors (Transmissions: 3T40, THM125C)
  • 2013 General Motors (Transmissions: 3T40, THM125C)
  • 2014 General Motors (Transmissions: 3T40, THM125C)
  • 2015 General Motors (Transmissions: 3T40, THM125C)
  • 2016 General Motors (Transmissions: 3T40, THM125C)
  • 2017 General Motors (Transmissions: 3T40, THM125C)
  • 2018 General Motors (Transmissions: 3T40, THM125C)
  • 2019 General Motors (Transmissions: 3T40, THM125C)
  • 2020 General Motors (Transmissions: 3T40, THM125C)
  • 2021 General Motors (Transmissions: 3T40, THM125C)
  • 2022 General Motors (Transmissions: 3T40, THM125C)
  • 2023 General Motors (Transmissions: 3T40, THM125C)
  • 2024 General Motors (Transmissions: 3T40, THM125C)
Shipping Information
  • Length: 13 inches
  • Width: 13 inches
  • Height: 8.5 inches
  • WEIGHT: No specific weight. (Average automotive converter weight is about 36 lbs)
General Motors Logo

General Motors 3T40 Torque Converters

This page contains an extensive list of torque converters for the 3T40 transmission.

View 3T40 Converters »
General Motors Logo

General Motors THM125C Torque Converters

This page contains an extensive list of torque converters for the THM125C transmission.

View THM125C Converters »
Customer Testimonies

Transolution
(Missoula, MT)

"A quality-built transmission performs only as exceptionally as the torque converter. No matter how superior the workmanship a technician builds into a custom-built transmission, a poor quality torque converter can spoil the works. That is why we at Transolution started using Precision of New Hampton Converter products. We discovered the quality of Precision Converter products back in 2002 after having some costly and embarrassing comebacks due to faulty torque converters manufactured by another company.

What a relief it has been not to experience the hassles of converter failures and comebacks. Precision of New Hampton Converters not only complements the high quality workmanship of our custom-built transmission, but the price is right too, a savings we are please to pass on to our customers."

-Chris Gerber


J

JR's Quality Transmissions
(Carencro, LA)

"Since switching to Precision fo New Hampton torque converters over 10 years ago we have been 100% satisfied not only with the products but with the customer service as well. Now our combacks are virtually non existant and a large part of that eason is Precision torque converters."

-Junior