2005 Archives - Transmission Digest
46-47RH/RE Cooler and Converter Flow

The image of a target is often used in education or training. The bulls-eye is the topic of most importance. It’s what you “Need to Know,” with each consecutive ring or “Nice to Know” reinforcing or providing that information.

December 2005 Issue

Issue Summary:

The RE4RO1A underwent significant changes in many of the internal parts beginning with the 2001 model year.

A Toyota/Lexus vehicle may exhibit shift-feel and drivability complaints after the transmission has been overhauled or replaced.

Failure of the E-clutch piston in ZF 5HP24 (A5S 440Z) transmissions can cause flared 1-2 and 2-3 shifts.

ZF Industries now offers a valve-body reconditioning kit for the ZF 5HP24.

Moving Forward with No Reverse

It is quite a surprise for a technician to learn that a malfunctioning TCC solenoid could cause a slipping in reverse or loss of reverse with 4L30-E transmissions.

Fight or Flight?

One of the most basic of all human instincts, it dates back to when man faced his first predator – be it an animal or another man – and had to make the decision: Do I stand my ground and fight, or do I run away so that, I hope, I live to gain strength and fight again on another day?

Rebuilding the Unrebuildable?

Today’s torque-converter rebuilders face increasingly complex rebuilding jobs. Perhaps no other torque converter has put rebuilders to the test more than some of the ZF 5HP-style converters. These torque converters are manufactured with what is described as a “captive clutch” and would normally be considered a non-serviceable item.

Why Didn’t I Think of That?

Once in a great while something comes along that makes you slap yourself on the forehead (ala Homer Simpson) and wonder why you didn’t think of that. The Teslite (teslite.com) test lead is one of those items – a very simple tool that can find a bad connection or contact with a quick push of a button.

The Tremec T56 Six-Speed: Revolution and Evolution

Tremec, also known as Transmission Technology Corp., is a major producer of manual-transmission and drivetrain components. Tremec operates a world-class plant that is producing transmission products for many of the world’s major auto and truck manufacturers.

How Will Gasoline Prices Affect the Transmission- and Auto-Repair Businesses?

Many of us remember the “gasoline shortages” of 1973 and 1979. Some sections of the U.S. were hit harder than others. The New York metropolitan area, for example, still had the problem months after the rest of the country had all but forgotten about it. It was as if we were supposed to suffer longer so the message would be heard loud and clear throughout the country that gas wasn’t going to be a cheap commodity anymore.

One for the ‘Arc-ives’

Finding the cause of an electrical problem on a Ford Expedition requires some detective work

A 2002 Ford Expedition equipped with a 4.6-liter V-8 and 4R70W transmission came into the shop with a host of solenoid electrical codes.

Leftover O-Rings

Have you ever wondered where those extra O-rings go that are left over in the kit bag after you’ve completed an overhaul on a transmission? Most rebuilders, including myself, will twist-tie them to a bellhousing bolt hole and say, “Must be some spare pieces for the R&R guy!”

4T65-E All-Wheel-Drive: Noise and Gear Failures

The 4T65-E was introduced in 1997 in several vehicles equipped with the supercharged 3.8-liter engine, and some non-supercharged 3.4- and 3.8-liter engines. It was considered to be the big brother to the 4T60-E transaxle.

November 2005 Issue

Issue Summary:

Beginning at the start of production for the 1999 model year, the planetary pinions on both carriers in THM 4L80-E transmissions were produced 10%thicker than those in previous models.

In a 1999 Chevy truck with a 6.5-liter diesel engine and 4L80-E transmission, the optical/fuel-temperature sensor was responsible for a complaint of 2-3/3-2 and 3-4/4-3 shift shuttles at cruising speed with 25%or greater throttle opening.