What This Joint Is
CP20RPLS1 is a heavy-duty u-joint sized at 71.3mm bearing cap diameter and 179.2mm overall across the caps. Those two numbers are the identity of the part. Pull the old joint, clean the caps, and measure with calipers before you order anything. Cap diameter is the figure people get wrong most often, because a few millimetres looks identical in a dirty driveline.
This is an RPL-pattern joint, the permanently lubricated style used on main driveshafts and interaxle shafts in Class 8 service. There is no grease zerk on the cross. The seals hold the factory charge of lubricant for the life of the joint, which means you cannot service it on a PM schedule. When it is dry or notchy, it gets replaced.
The joint is manufactured by Zhuhai Fengli Auto Technology Co.,Ltd and sold as a direct replacement. It is not an OEM part and PartStop is not affiliated with, endorsed by, or authorised by any OEM. Every other manufacturer's number on this page is listed for identification only, so you can match what is stamped on your old part.
Why These Numbers Cross
The RPL family was built around a fixed envelope: cap diameter, span, and the snap ring or bearing plate retention geometry. Once a driveline builder settled on that envelope, every truck OEM that bought those shafts inherited the same joint and issued their own part number against it. That is why Freightliner 01CP20RPLSE, Mack 8235-CP20RPLS, Volvo 85105953 and Navistar 2502-923-C all land on the same physical cross.
The aftermarket numbers follow the same logic from the other direction. Automann 752.1220R, Neapco 60020 and UJ60020, Euclid EDL20RPL1, PAI 5908, Newstar S-13529, and World American WARPLS20 and RPL20 are catalogue identities built on the 71.3 x 179.2mm dimension. Dana 35RPL20X and Spicer PAC20RPLS come off the original driveline programme. Meritor carries a long run of suffixes under 20RPL and CP20RPL.
Those Meritor suffixes, CP20RPL1 through CP20RPL11, usually reflect packaging, kit contents, or production revision rather than a different joint body. Treat the suffix as a clue, not a guarantee. If your old cross is stamped with one of these numbers and your caliper readings agree, you are in the right family. Confirm fit by VIN or by the number on the part you removed.
How These Fail
RPL joints fail from seal loss first. Once a lip seal gets nicked during install or wears through, the needle bearings run dry, the rollers brinell the trunnion, and you get the classic clunk on throttle transition followed by a vibration that climbs with road speed. Grab the shaft and try to rotate it against the yoke. Any detectable lash at the cross means replacement.
The other killer is install damage. Driving caps in with a hammer, cocking a cap in the yoke bore, or losing needles during assembly will take out a new joint inside a few thousand miles. Press the caps in square, check that the retention hardware seats fully, and inspect the yoke bores for ovality or step wear before you commit a new joint to a worn yoke.
CP20RPLS1 Cross-Reference & Interchange Numbers
These manufacturer and aftermarket numbers commonly cross-reference to CP20RPLS1. Use them to identify the part — then confirm the exact fit by VIN or the number stamped on your old unit before you order. An interchange is a starting point, not a fitment guarantee.
| Brand / Line | Cross-Reference Numbers |
|---|---|
| Cross-Reference | Automann 752.1220R, 752.122OR, Dana 35RPL20X, Neapco 60020, UJ60020, Euclid EDL20RPL1, Freightliner 01CP20RPLSE, TDACP20RPLS, TDACP20RPLS1, TWDCP20RPLS, Mack 8235-CP20RPLS, Meritor 20RPL, 20RPLS, CP20RPL, CP20RPL1, CP20RPL11, CP20RPL3, CP20RPL7, CP20RPL8, CP20RPL9, Navistar 2502-923-C, 2502923C91, ATICP20RPLS, PAI 5908, EM59090, JUJ-5909, Spicer PAC20RPLS, PACCP20RPLS, Volvo 85105953, Newstar S-13529, World American WARPLS20, RPL20 |
Frequently asked questions
Does CP20RPLS1 need greasing?
No. This is a permanently lubricated RPL-style joint with no grease fitting on the cross. Do not drill it or attempt to add a zerk. When the seals give up and the joint goes notchy, the joint gets replaced rather than serviced.
How do I confirm 71.3 x 179.2mm is my size?
Pull the joint, wipe the caps clean, and measure cap outside diameter with calipers, then measure the overall distance across two opposing caps. Compare both figures. If either reading is off, you are looking at a different joint, even if the part number on the old cross appears in the cross-reference list.
My old cross is stamped CP20RPL7 — is this the same part?
CP20RPL7 is one of the Meritor suffixes that crosses into this family, and the suffixes generally reflect packaging or revision rather than a different joint body. Verify with caliper readings on cap diameter and span, and confirm against your VIN. Cross-reference is a starting point, not a fitment guarantee.
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