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Inland Empire Driveline SY-727-1350 Inland Empire Driveline Transmission Yokes

Inland Empire Driveline SY-727-1350 Inland Empire Driveline Transmission Yokes

$180.50
$180.50
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The Inland Empire Driveline Transmission Yoke SY-727-1350 is a heavy-duty slip yoke for Chrysler 727 TorqueFlite transmissions in A-body, B-body, and E-body Mopar muscle cars. If you're building a high-horsepower Mopar with a 440 or 426 HEMI, the factory yoke is a documented weak point—this 1350-series upgrade eliminates it.

Machined from 4140 heat-treated chromoly steel, the SY-727-1350 features a 31-tooth internal spline matching the 727's output shaft within 0.002 inches. The u-joint ears accept Spicer 1350-series cross kits, representing a significant upgrade from stock 7260 or 7290 series. The yoke body is 2.5 inches longer than stock for additional spline engagement depth in lowered vehicles.

The 1350-series u-joint offers 40% more load capacity and greater operating angle capability than 7260-series. For a big-block Mopar making over 500 lb-ft, this is the minimum reliable yoke upgrade. The slip surface is hard-chrome plated for reduced rear seal bushing wear.

Your 727 TorqueFlite deserves a yoke as strong as your engine. Get the Inland Empire SY-727-1350 and eliminate a known weak link. Order now.
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Frequently Asked Questions

What spline count and transmission models does the Inland Empire 727-1350 yoke fit?

The Inland Empire Driveline transmission yoke features a 27-spline internal spline pattern that fits GM TH350, TH400, 700R4, 4L60E, and 4L80E automatic transmissions, as well as some Ford and Mopar manual transmissions with the same spline count. It uses a 1350-series u-joint that measures 3.625 inches across the bearing cap centers, providing a high-strength connection for performance applications. The yoke is machined from 4340 heat-treated steel for maximum torsional strength.

Does the Inland Empire yoke use billet steel or cast steel construction?

The Inland Empire Driveline transmission yoke is CNC-machined from a solid billet of 4340 chromoly steel and then heat-treated to a Rockwell hardness of 38 to 42 HRC for superior strength compared to factory cast yokes. Billet construction eliminates the porosity and stress risers that can lead to cracking in cast yokes under high-horsepower applications. This yoke is designed for vehicles making over 500 horsepower where a factory yoke might twist or crack.

Will the 727-1350 yoke work with a 1350-series driveshaft u-joint?

Yes, the Inland Empire transmission yoke is specifically designed to accept a 1350-series universal joint, which uses a 3.625-inch bearing cap span and 1.188-inch cap diameter. The 1350-series joint is significantly stronger than the smaller 1310 and 1330 joints, making it the standard for performance and racing drivelines. The yoke's u-joint ears are precision-bored to accept the 1350 joint cups with a zero-clearance press fit for maximum strength.

Does the Inland Empire yoke include the u-joint and retaining straps?

The Inland Empire Driveline transmission yoke is typically sold as the yoke only, without the u-joint or retaining straps, allowing you to choose the specific u-joint brand and type for your application. You will need to purchase a 1350-series u-joint and the correct u-bolts, straps, or bolt-in caps separately. Spicer or Neapco premium u-joints are recommended for high-performance applications using this yoke.

How do I measure for the correct slip yoke length for my transmission?

To measure for the correct slip yoke length, you need to check the transmission output shaft extension beyond the tail housing seal and ensure the yoke has at least 0.75 to 1 inch of spline engagement when the suspension is at full droop. The overall length from the u-joint center to the seal surface determines the correct yoke part number. Inland Empire publishes the dimensions so you can compare against your existing yoke or transmission output shaft position.

Can I use this transmission yoke with a factory GM TH400 or TH350 transmission?

Yes, the Inland Empire transmission yoke is a direct-fit replacement for the factory slip yoke used in GM TH350 and TH400 transmissions that have a 27-spline output shaft, and it is also compatible with 700R4, 4L60E, and 4L80E transmissions with the same spline pattern. The billet 4340 steel construction provides a significant strength upgrade over the factory cast or stamped steel yoke. Always measure the output shaft diameter and length to ensure the yoke slides on fully without bottoming out.