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Delphi TC637 Suspension Ball Joint - Front Left Lower
| Brand | Delphi TC637 |
|---|---|
| Position | Front Left Lower |
| Adjustable | No |
| Ball Joint Assembly | Yes |
| Bushings Included | No |
| Castle Nut Included | Yes |
| Color | Gray |
| Cotter Pin Hole | Yes |
| Cotter Pin Included | Yes |
| Distance Between Mounting Holes | 35.0 |
| Dust Boot Included | Yes |
| Dust Boot Material | Choloroprene Rubber (CR) |
| Grease Fitting Included | No |
| Greaseable | No |
| Height | 3.831 |
| Height | 97.3 |
| Item Grade | Standard Replacement |
| Length | 121 |
| Material | Steel |
| Maximum Outside Diameter | 1.732 |
| Maximum Outside Diameter | 44.0 |
| Mount Plate Included | No |
| Mounting Bolt Head Diameter | 0.748 |
| Mounting Bolt Head Diameter | 19.0 |
| Mounting Bolt Length | 1.181 |
| Mounting Bolt Length | 30.0 |
| Mounting Bolt Shank Diameter | 0.472 |
| Mounting Bolt Shank Diameter | 12.0 |
| Mounting Bolt Thread Diameter | 12.0 |
| Mounting Bolt Thread Length | 0.787 |
| Mounting Bolt Thread Length | 20.0 |
| Mounting Bolt Thread Pitch | 1.25 |
| Mounting Bolts Included | Yes |
| Mounting Hardware Included | Yes |
| Mounting Hole Quantity | 3 |
| Mounting Type | Bolt On |
| Nuts Included | Yes |
| Stud Tapered End 1 Diameter | 0.61 |
| Stud Tapered End 1 Diameter | 15.5 |
| Stud Tapered End 2 Diameter | 0.717 |
| Stud Tapered End 2 Diameter | 18.2 |
| Stud Thread Diameter | 0.551 |
| Stud Thread Diameter | 14.0 |
| Stud Thread Length | 0.787 |
| Stud Thread Length | 20.0 |
| Stud Thread Pitch | 1.5 |
| Stud Type | Threaded |
| Suspension Grade Type | Standard |
| Tapered Stud | Yes |
| Washers Included | No |
| Width | 70.0 |
| Wrench Size | 0.748 |
| Wrench Size | 19.0 |
| Fits | Toyota and Geo · 10 vehicles |
OE expertise. Delphi applies OE engineering to its aftermarket steering portfolio.
Bolt-on installation. Includes mounting hardware for a straightforward replacement.
Steel construction. Built with a dust boot and ball joint assembly for dependable service.
Cross-references Beck/Arnley 101-4136, Mevotech Supreme MK9525 and 43340-19015 for the same application. See all 7.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Delphi TC637 Suspension Ball Joint
Delphi TC637 is a bolt-on suspension ball joint built for OE-style fit and function on select Toyota Corolla and Geo Prizm applications. It uses a steel body, threaded stud, dust boot, and included mounting hardware to support front left lower suspension service.
Key Features
- Fits 1988-1993 Toyota Corolla, front left lower
- Fits 1989-1992 Geo Prizm, front left lower
- Steel construction with gray finish
- Bolt-on mounting type with 3 mounting holes
- Threaded, tapered stud with dust boot included
- Castle nut, cotter pin, nuts, and mounting bolts included
- Standard suspension grade type; non-greaseable design
- Delphi TC637 cross-references Beck/Arnley 101-4136 for the same application
Detailed Description
Delphi TC637 is engineered as a suspension ball joint for the front left lower position on 1988-1993 Toyota Corolla and 1989-1992 Geo Prizm models. Delphi applies OE-focused dimensional and material analysis to help match aftermarket fitment to the original part, while the assembly is tested across extreme temperature ranges and salt-spray exposure for durability in demanding road conditions. The result is a direct-service replacement for worn lower ball joints on these compact front suspension applications.
This Delphi TC637 ball joint features a steel housing, chloroprene rubber dust boot, threaded tapered stud, and bolt-on mounting design. The included castle nut, cotter pin, nuts, and mounting bolts support a complete service installation for the specified position. Delphi TC637 is also listed as an interchange for Beck/Arnley 101-4136.
What It Helps Fix
- Front-end looseness or play at the lower control arm
- Clunking or popping noises from the front suspension
- Uneven tire wear caused by worn ball joint movement
- Steering wander or reduced directional stability
- Inspection failure related to excessive suspension joint wear
Installation Notes and Tips
Verify the front left lower position before installation and compare the stud taper, mounting hole spacing, and bolt-on layout to the removed part. Clean the mounting surfaces, torque fasteners to the vehicle specification, and confirm proper cotter pin engagement after tightening. Because this is a non-greaseable assembly, routine service is limited to inspection for boot damage, looseness, or corrosion.
Quality Assurance
Delphi uses OE-based engineering and material analysis for aftermarket steering and suspension parts. TC637 is tested for temperature extremes below -40 degrees C and above 120 degrees C, and it is exposed to 720 hours of salt spray to evaluate corrosion resistance and durability.
| Year | Make | Model | Drive Type | Position | Notes |
|---|---|---|---|---|---|
| 1993 | Toyota | Corolla | AWD | Front Left Lower | — |
| 1992 | Geo | Prizm | — | Front Left Lower | — |
| 1992 | Toyota | Corolla | — | Front Left Lower | — |
| 1991 | Geo | Prizm | — | Front Left Lower | — |
| 1991 | Toyota | Corolla | — | Front Left Lower | — |
| 1990 | Geo | Prizm | — | Front Left Lower | — |
| 1990 | Toyota | Corolla | — | Front Left Lower | — |
| 1989 | Geo | Prizm | — | Front Left Lower | — |
| 1989 | Toyota | Corolla | — | Front Left Lower | — |
| 1988 | Toyota | Corolla | — | Front Left Lower | — |
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