selecting a torque converter stall speed

[armin _cadillac]

Hello
I don't know what torque converter stall installed gm factory on the gm 76 cadillac seville engine 350 oldosmobil +th400 ...

and 76 buick skylark 4 door sbc 350 +trans
th 350 ..
How do I find them ? I don't understand

 

[Grumpy]

An automatic transmission stall test PDF guides mechanics on diagnosing slipping clutches or torque converter issues by holding the brake and flooring the accelerator in drive/reverse to measure engine RPM (stall speed) against specs, requiring warm fluid, secure chocks, and brief test durations (under 3-5 secs) to prevent overheating, with high RPMs indicating slippage and low RPMs suggesting problems like a bad converter or low pressure. Key steps involve fluid checks, warming the fluid (50-80°C), and testing in R, D, & L/1, then comparing readings to specs to pinpoint faults like weak internal clutches or converter issues.

Google Search

www.google.com

 

[armin _cadillac]

An automatic transmission stall test PDF guides mechanics on diagnosing slipping clutches or torque converter issues by holding the brake and flooring the accelerator in drive/reverse to measure engine RPM (stall speed) against specs, requiring warm fluid, secure chocks, and brief test durations (under 3-5 secs) to prevent overheating, with high RPMs indicating slippage and low RPMs suggesting problems like a bad converter or low pressure. Key steps involve fluid checks, warming the fluid (50-80°C), and testing in R, D, & L/1, then comparing readings to specs to pinpoint faults like weak internal clutches or converter issues.

Google Search

www.google.com

Thanks for your help
Sorry, engineer.. I didn't mean the stall test.. I'm looking for the torque converter codes and specifications. What specifications do they have? What torque converter was installed on the Cadillac Seville76 .. 77? Is there a link about the torque converter?
Thank you for helping me.

 

[Grumpy]

Free Service Manuals for Chevrolet vehicles | Operation CHARM

Detailed repair/service/workshop manuals for many Chevrolet vehicles, including electrical diagrams, recommended bolt torques, and estimated labor times.

charm.li

Id suggest you purchase a shop service manual,
for your exact maker,model and year of car,
as it will have a wealth of info related to that car

Torque Converter Identification Guide | PDF | Motor Vehicle | Car

The document provides information about identifying automatic transmission converters, organized by manufacturer and converter code. It lists specifications for various converters, including year, engine, diameter, hub details, spline count, pilot diameter, mount type, pilot center-to-bolt...

www.scribd.com

Torque Converter Identification Guide | PDF | Motor Vehicle | Car

The document provides information about identifying automatic transmission converters, organized by manufacturer and converter code. It lists specifications for various converters, including year, engine, diameter, hub details, spline count, pilot diameter, mount type, pilot center-to-bolt...

www.scribd.com

https://www.transparts.ru/pdf/tc_gm_03_web.pdf

https://www.floridatorqueconverters.com/media/ftc-application-chart-customer.pdf

GM Torque Converter Identification Guide | PDF | Transmission (Mechanics) | Vehicle Technology

The document provides information about catalog design and use for torque converters, including definitions of the abbreviations and measurements listed in converter identification. It explains that DIA refers to overall diameter, pilot to pilot diameter, hub to hub diameter at the bushing...

www.scribd.com

https://static.speedwaymotors.com/pdf/20070420.pdf

GM Transmission Info

www.gmtuners.com

https://www.transtaraftermarket.com/wp-content/uploads/TorqueConverterCatalog_2012.pdf

Site Maintenance

www.chevrolet.com

Anjo Torque Converter Catalog 2018 | PDF | Vehicle Industry | Transport

This document is the 2018 catalog from ANJO Machine providing information on special build and maximum duty torque converters for various domestic transmission applications. It lists torque converter part numbers and specifications for Ford, Dodge, GM, and Chrysler transmissions, including the...

www.scribd.com

GM torque converter part numbers and specs aren't in one simple chart; they depend heavily on the transmission family (4L60E, 4L80E, TH350/400), diameter (245mm, 298mm), spline count (30-spline), stall speed, and lockup type (none, PWM), requiring a lookup by your specific application using codes or specs from catalogs like Transparts or Chevrolet Performance guides. Key specs to match are diameter (e.g., 245mm vs. 298mm), spline count (usually 30), and whether it's for a lockup (PWM) or non-lockup application.
Key GM Torque Converter Specifications

• Transmission Family: 4L60E/700R4, 4L80E/400, TH350, etc..
• Diameter: Common sizes are 245mm, 258mm, 298mm, 310mm.
• Spline Count: Often 30-spline for 4L60E/700R4.
• Stall Speed: Varies (e.g., 2700-3000 RPM for performance).
• Lockup: Non-Lockup (N/L) or Lockup (L/U); PWM (Pulse Width Modulation) types needed for modern computer controls.
• Piston Lining: Paper, Carbon Fiber (PWM I), or Woven Graphite (PWM II) for computer strategy.

Example Part Numbers & Families

• Chevrolet Performance Supermatic (4L60E/65E/70E): 19299800-19299803.
• Chevrolet Performance Supermatic (4L80E/85E): 19299804-19299807.
• Common 4L60E/700R4: 298mm diameter, 30-spline, 1987-1996 engines.

Finding Your Part Number

1. Identify Transmission: Know your exact transmission (e.g., 4L60E, TH400).
2. Check Your Converter: Note its diameter, spline count, and if it has a lockup mechanism (often a square electrical connector).
3. Use a GM Code Chart: Look for charts in aftermarket catalogs (like Transparts) that link your transmission code/specs to a converter.
4. Match Specs: Find a converter with the matching diameter, spline count, and lockup/stall characteristics for your build.

Key Considerations

• Interchangeability: 4L60E converters do NOT fit 4L80E transmissions due to different input shafts.
• Lockup: Using the wrong lockup type (e.g., non-lockup on a PWM system) causes issues.

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