GM OE reverse input clutch housing 24245624 for 700R4 and 4L60E units where the 2-4 band has scored or stepped the drum surface.
A 4L60E that slips or flares into 2nd, drops out of 4th on the highway, or has no Reverse after a rebuild very often has a damaged reverse input housing. This is the GM Genuine Parts reverse input clutch housing, part number 24245624, for the 700R4, 4L60, 4L60E, 4L65E and 4L70E family from 1987 through 2014. Buy it when the outer band surface is scored or stepped, the drum is cracked, or the piston bore will no longer hold a seal.
This drum does two jobs. Inside, it holds the reverse input clutch pack and its piston, which applies together with the low-reverse clutch to give you Reverse. Outside, its machined surface is what the 2-4 band clamps onto in 2nd and 4th gear. Because the housing is splined to the reaction sun shell, holding the drum still with the band is what produces those two gears. So a single worn surface on this part can cost you 2nd, 4th and Reverse depending on where the damage is.
No Reverse on a 4L60E can also be the low-reverse clutch or a broken reaction shell, so rule those out first; our 4L60E low-reverse clutch failure guide covers how to tell them apart. With the unit apart, clean the drum and inspect the band surface under good light. Run a fingernail across it: any step means the drum goes. Air-check the reverse input piston through the case feed passage and listen for a clean apply with no leak-down. If the band was burnt, the drum surface was overheated with it and should be replaced rather than sanded.
GM lists 24245624 for the 700R4, 4L60, 4L60E, 4L65E and 4L70E from 1987 to 2014. That covers most Chevrolet and GMC trucks and SUVs, Camaros, Corvettes and other GM rear-drive cars that used these transmissions. Because that span covers several design updates, compare your old drum to the photo or send us your year and VIN to verify. Browse matching parts on our 4L60E parts page.
If the unit needs a full freshen, the 4L60E master rebuild kit with solenoids, band and filter covers the soft parts in one order. Read our 4L60E common problems guide for the other parts that usually fail alongside this housing.
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Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
It is the GM Genuine Parts reverse input clutch housing for the 700R4, 4L60, 4L60E, 4L65E and 4L70E. It holds the reverse input clutch and its outer surface is where the 2-4 band applies.
No. It is the housing with its piston. Frictions, steels and seals come from your rebuild kit.
A light polish can clean up glaze, but a stepped or blued band surface should be replaced. A new band on a worn drum usually slips again quickly.
It can, through a leaking piston seal, cracked drum or burnt reverse input clutch. On the 4L60E the low-reverse clutch also applies in Reverse, so check both.
A new 2-4 band, the reverse input clutch frictions and steels, piston seals, and often the reaction sun shell if it has spline wear. Use Dexron VI ATF on refill.
