4L70E Input Drum 1993, remanufactured and ready to install. Fits the 4L70E. Ships fast from the USA.
Rebuilding a GM four-speed and found the drum under the 2-4 band scored, heat-checked or cracked? This remanufactured input drum is listed for 1993, the first year GM put electronic control on its rear-drive four-speed, and it is a common pick when a 4L70E or a 4L60E-based build needs a cleaned, inspected housing for less than a new GM part. Our listing photo shows the drum with a clutch pack fitted, a smooth band surface on the outside and slotted drive tabs on the open end, which is the layout of the reverse input drum. Check that against your old part before you order.
No truck left the factory with a 4L70E in 1993. That name came much later, on the heavy-duty version of the same family used in 2006-2013 Silverado, Sierra, Tahoe, Yukon and Trailblazer SS models. The reverse input housing, though, is shared across the 4L60, 4L60E, 4L65E and 4L70E, which is why a 1993-pattern drum is offered for 4L70E work. Our 4L60E, 4L65E and 4L70E interchange guide explains which hard parts cross over between the three and which do not.
It has an outside job and an inside job. The 2-4 band clamps the outer surface to stop the drum and the reaction sun shell its tabs engage, giving 2nd and 4th gear. The reverse input clutch inside drives that same sun shell in Reverse. A reman unit is only as good as those two surfaces, so a properly refinished band face and a piston bore that holds air are what you are paying for.
Do not condemn the drum on symptoms alone. Delayed engagement and slipping in this family very often start with low pressure, a leaking servo or a valve body problem. Work through the 4L70E delayed engagement guide and the valve body testing guide first. Then, with the drum out, check the band surface with a straightedge and air-check the reverse input piston.
The listing names 1993. Within this family GM revised drum bushings and part numbers over the years, so a 1993-pattern housing is not guaranteed to match every later unit detail for detail. Compare tab count, bushing size and overall height with your old drum, or send us the year and VIN of the vehicle and we will confirm before it ships. If your unit is a later 4L70E and you would rather have the current GM number, the new GM 24245624 reverse input drum covers 1987-2014. Browse the rest of the 4L70E parts collection for the matching pieces.
For an older unit getting a full overhaul, the 1992-2003 Banner rebuild kit supplies the gaskets, seals and frictions to go with it.
| Fits | 4L70E 1993 |
| Part type | Input Drum |
| Condition | Remanufactured |
| Brand | OEM |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
No. 1993 was the first 4L60E year, and the 4L70E name came later. This drum is listed for 1993 and offered for 4L70E work because the reverse input housing is shared across the family.
The listing photo shows a drum with a smooth band surface and slotted drive tabs, which is the reverse input drum. Compare it with your old part, or send us your year and VIN before ordering.
It is a used GM housing that has been cleaned, inspected and made ready to install. Still check the band surface and air-check the piston before you build it in.
Yes. A used band will not wear in properly on a refinished drum and is a common reason for a repeat failure.
Only if the reverse input clutch or drum is the cause. Low pressure, a valve problem or the low-reverse clutch can also take away Reverse, so diagnose first.
