5L50E Input Drum, used and ready to install. Fits the 5L50E. Ships fast from the USA.
When a 4.6L Cadillac XLR, STS or SRX with the 5L50E starts flaring between gears, slips in the upper ranges, or comes apart on the bench with a scored or cracked housing, you need the drum itself, not just plates. This is a used, original GM input shaft / intermediate drum for the 5L50E, removed from a tested, drivable 2004 Cadillac XLR. The photo shows the drum as it came out of that transmission, plates still stacked inside.
The 5L50E builds five forward speeds (3.42 first through 0.75 fifth) by holding and driving parts of its planetary gearset with a series of multi-plate clutches. GM's own clutch list for this family includes the forward, coast, direct, reverse, low/reverse, second, second coast, intermediate and overdrive clutches. The intermediate and overdrive clutches are carried in a common housing, which GM locates with a selective retaining ring offered in several thicknesses, and Transmission Digest notes that this OD/intermediate housing is fed through a seal sleeve in the case between the valve body and the housing. In the 5L50E the intermediate clutch uses eight plates with 1.39 to 1.84 mm of clearance, two more than the 5L40E, which is part of why the 5L50E is rated for about 311 lb-ft.
A housing problem and a valve problem can feel the same from the driver's seat. Sonnax lists AFL valve wear in this family as a cause of overdrive, forward and coast clutch distress, low line pressure and gear ratio codes, so test before you tear down. Scan for codes, check the fluid, and run a pressure check with our line pressure testing guide. Use the flare vs slip guide to pin down which shift is failing. Once the unit is apart, air-check the housing with the case seal sleeve in place; if the piston holds and the housing is clean, the plates may be the only problem. Replace the drum when it is cracked, scored at the seal surfaces or worn at its bearing.
Fits the 5L50E; the donor was a 2004 Cadillac XLR. Transmission Digest notes that Cadillac paired the 5L50E only with the 4.6L engine, and BMW used the same family as the A5S360R and A5S390R. The 5L40E is a close relative but runs fewer plates in this housing, so it is not a guaranteed swap. This is a used OEM component and GM revised these housings over time, so set it beside your old drum and compare the spline, sealing lands, bearing and ring groove before you install it, or send us your year and VIN and we will check. See every part we carry on the 5L50E parts page.
Pair it with the 5L50E master rebuild kit for new frictions and seals. If you are also chasing a Reverse complaint, the matching 5L50E reverse clutch drum came from the same donor transmission.
| Fits | 5L50E |
| Part type | Input Drum |
| Condition | Used |
| Brand | GM |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
It was removed as the input shaft / intermediate drum from a 2004 Cadillac XLR 5L50E. In this family the intermediate and overdrive clutches share one housing. Compare it with your old drum before installing.
Not safely. GM specifies eight intermediate clutch plates in the 5L50E and six in the 5L40E, so the housings and packs differ. Send your year and VIN if you are unsure.
Yes. Sonnax ties AFL valve wear to overdrive, forward and coast clutch distress and gear ratio codes in the 5L40E and 5L50E. Test line pressure before replacing hard parts.
New frictions, steels and piston seals, the correct selective retaining ring, a fresh filter and pan gasket, and the case seal sleeve if it is worn.
Clear codes and let the transmission control module adapt shifts after the repair. Our adaptive relearn guide covers the process.
