QU40939 1310 Series EZ-Grease External Snap Ring U-Joint

QU40939 1310 Series EZ-Grease External Snap Ring U-Joint with a lube fitting threaded into one of the bearing cups making it MUCH easier to grease your double cardan CV Joint in the vehicle. This is a hot-forged, alloy steel, case hardened universal joint that fits a multitude of 4x4 front and rear driveshaft applications from the 1940's to current. These are very good quality universal joints with flexible nitrile rubber seals to purge water and excess grease.

Also See: QU40784 Greaseable 1310 Series U-Joint

Need More Info? Use the handy Links below to access over 40 years of Dan's product and vehicle specific Tech Notes to easily get the information you need for your vehicle's repair, maintenance, or upgrade project!

Dan the Gear Man® Tech Notes:
U-Joint Specs
EZ Grease Perk
Tech Info
Grease Regularly
Matching Parts
Applications

Tech Note 1: U-Joint Specs
QU40939 are external snap ring type universal joints made to Spicer 1310 series dimensional specifications. The u-joint cup diameter is 1-1/16". The overall width is 3-7/32".

Tech Note 2: EZ Grease Perk
With a grease fitting threaded into one of the bearing cups, QU40939 makes it easy to grease your grease your u-joints in tight quarters. Most 4x4 Double Cardan Constant Velocity CV Joints are located in hard to access places making it almost impossible to grease the two u-joints in the vehicle when the grease fitting is in the cross, With our EZ-Grease U-joints, the cup mounted fitting is right out in the open, saving you time, every time you crawl under your 4x4 with a grease gun.

Tech Note 3: Tech Info
More universal joints and driveshaft yokes are wrecked by slam-bang methods of u-joint replacement than by any other cause. Refer to TM3000 Driveshaft and Universal Joint Manual or TSB3502 External Snap Ring Single-Cardan U-Joint Service.

Tech Note 4: Grease Regularly
Service intervals for this greaseable universal joint will vary with your driving conditions and type of grease you use, but as a minimum, you should grease your u-joints with QU90018 Pyroplex® Plus Synthetic Grease or other quality, water resistant NLGI #2 GC-LB grease at every oil change or every three months which ever comes sooner. Lube more frequently in extremely wet conditions or after submersion under water. Remember, a greaseable joint that is not regularly lubed will prematurely fail from water contamination or grease loss. So, if you and your grease gun don't get together very often, we recommend you select the more expensive TK40720 Torque King® premium non-greaseable universal joint which has an average life of 7-10 years due to it's durable cold-forged cross, factory synthetic lubricant, and superior seals which keeps contaminants out.

Tech Note 5: Matching Parts
Matching Parts for QU40939 U-Joints:
TK40720 Torque King® premium non-greaseable universal joint
QU40735 Strap and Bolt Kit
QU40768 U-Bolt Kit
QU40849 26 Spline Dana 30, Dana 44, Dana 50 Pinion Yoke (U-Bolt Style)
QU40734 26 Spline Dana 30, Dana 44, Dana 50 Pinion Yoke (Strap and Bolt Style)
QU40621 Dana 35 Pinion Yoke (Strap and Bolt Style)
QU40847 29 Spline Dana 60 Pinion Yoke (U-Bolt Style)
QU50813 30 Spline Pinion Yoke for GM 10 Bolt, 8.5" Front or Rear Axles
QU40746 32 Spline NP205 Transfer Case Yoke
QU50819 10 Spline Dana 18, Dana 20, Dana 21 Transfer Case Output Yoke
QU40785 6" Long x 16 Spline 1310 Series Slip Yoke
QU40753 6-7/8" x 16 Spline 1310 Series Slip Yoke
QU40927 8-7/8" Long x 16 Spline 1310 Series Slip Yoke
QU40881 31 spline based on 32 Spline Slip Yoke for Chevy and GMC
QU40755 Greaseable CV Centering Yoke
QU40733 Non-Greaseable CV Centering Yoke
QU40801 CV Center H Yoke
QU90018 Pyroplex® Plus Synthetic Grease
For U-Joint Service Tools, See our 4x4 Tools U-Joint Tooling Web Page

Applications:
Applications for this universal joint are too numerous to list for every application.
If your application is not listed, verify by size.

Chevy/GMC
Front Double-Cardan CV Driveshafts: 1966, 1967, 1968, 1969, 1970, 1971, 1972, 1973, 1974, 1975, 1976, 1977
Most 4x4 Rear Driveshafts up to 1/2 ton: 1960, 1961, 1962, 1963, 1964, 1965, 1966, 1967, 1968, 1969, 1970, 1971, 1972, 1973, 1974, 1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982

Dodge
U-Joints for CV head in Double-Cardan Front CV Driveshaft: 1974-1975.5

Ford
Most Front and Rear Drive Shafts for Bronco and F100/F150 to 1978
Front CV Driveshafts for CV Head on F-250 to 1978
Bronco II, Explorer, and Ranger Pickup driveshafts with 1310 series universal joints

Jeep
Most Jeeps from the 1940's-on used 1310 series u-joints in one or both driveshafts.