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4L60E Input Drum 1992

$83.99
In stock • ships from the USA

4L60E Input Drum 1992, remanufactured and ready to install. Fits the 4L60E. Ships fast from the USA.

Fits these transmissions
Secure Stripe checkout • free shipping over $100 • 30-day returns
Secure Stripe checkout
Ships from the USA
30-day returns

About this product

Late 4L60 and early 4L60E trucks, vans and Camaros that have started flaring on the 1-2 shift, slipping in overdrive, or backing up only after a long pause usually need attention at the front of the gear train. This remanufactured input drum is listed for 1992 applications. The photo shows the open clutch end with the drive lugs around the rim, which is the reverse input housing: the drum that the 2-4 band wraps around and that houses the reverse input clutch. It comes cleaned, inspected and ready to build, with a 1-year warranty.

What the reverse input drum does in a 4L60E

This drum sits directly behind the pump and does two jobs. Its outer surface is the friction face for the 2-4 band. When the servo squeezes the band, the drum is locked to the case, and because its lugs drive the reaction sun shell, that holds the sun gear for 2nd and 4th. Inside, the reverse input clutch pack and its piston lock the drum to the input side so the sun shell is driven for Reverse. One part, two very different failure signatures: a worn outer face hurts the forward upshifts, while a leaking piston, a cracked lug or a worn bushing shows up when you pull it into Reverse.

Symptoms that point to this drum

How to confirm it before ordering

Check fluid level and condition, then line pressure; a weak pump or worn servo will slip a perfectly good drum. If you only have a Reverse complaint, the low-reverse clutch and roller clutch can cause it too, and our guide to 4L60E low-reverse clutch failure explains how to tell them apart. On the bench, air-check the reverse input piston for a firm apply with no hiss, inspect the lugs where they engage the sun shell, and lay a straightedge across the band face. Sonnax points out that an old band compresses the drum and leaves a slight dish in that face, which is why a wider band should only go on a new drum. Our 4L60E common problems guide covers the other wear items that fail at the same mileage.

Fitment for 1992

1992 sits right on the changeover. Most GM rear-drive vehicles that year still ran the hydraulically controlled 4L60, the renamed 700-R4, and the electronic 4L60E followed in trucks for 1993. The reverse input drum is a shared design across that family, so a 1992 drum is a sensible choice for either version, but running changes did happen. Before installing, compare your old drum's bushing, lug pattern and overall height against the photo, or send us your year, vehicle and VIN and we will confirm it. If you want the drum sold under GM reference number 24245624, see the 24245624 reverse input housing. Everything else for this family is on our 4L60E parts page.

Install notes


Specifications

Fits4L60E 1992
Part typeInput Drum
ConditionRemanufactured
BrandOEM
ShipsFrom the USA
Warranty1-year

Complete the job: parts that go with this

Doing this repair right usually means replacing these at the same time. Same transmission, ships together.

4L60E Clutch Module 1993
4L60E Clutch Module 1993
$76.99

4L60E Input Drum 1992: common questions

Will this 1992 drum fit a 1993 or later 4L60E?

Often yes, because the reverse input housing is a shared design across the 4L60 and 4L60E, but GM made running changes. Compare the bushing, lug pattern and height to your old drum, or send us your year and VIN before ordering.

Is this the input housing with the turbine shaft?

No. The photo shows the reverse input housing, the drum the 2-4 band wraps around. The input housing with the pressed-in shaft holds the 3-4, forward and overrun clutches and is a separate part.

What should I replace along with the drum?

A new 2-4 band, new reverse input frictions, steels and piston seals, and an inspection of the reaction sun shell and servo. A used band will not seat correctly on a fresh drum surface.

Can a bad reverse input drum cause slipping in 2nd and 4th?

Yes. The 2-4 band holds this drum for both 2nd and 4th, so a glazed or dished band surface can let either gear slip even when the clutches are healthy.

What fluid does it take?

Use Dexron VI ATF, which GM lists as the replacement for the earlier Dexron fluids. Check the level hot after the first drive.


Repair guides for this job

Sources
  1. Sonnax — Extra Wide Intermediate Band 77700-01K. Confirms the band is a drop-in for 4L60 and 4L60E units and that a new drum is recommended with a wider band. www.sonnax.com/parts/2429-extra-wide-intermediate-band
  2. Sonnax — Building the Killer 4L60E: Top Tips for Optimizing Your Transmission Upgrades. Explains how an old band dishes the drum surface and why that causes 2nd gear slip, glazing and burning. www.sonnax.com/tech_resources/293-building-the-killer-4l60e-top-tips-for-optimizing-your-transmission-upgrades
  3. Raybestos Powertrain — GM 4L60E GPZ Friction Clutch Pack RGPZ-001. Lists the reverse input friction specifications alongside the other 4L60E clutch packs. www.raybestospowertrain.com/friction-clutch-packs/rgpz-001

4L60E Input Drum 1992

$83.99
In stock • ships from the USA • 30-day returns

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