Description
The stock hub and shaft is made of 4130 steel. TCS hot forged billet shaft is made of 4340M/300M steel. There is no comparison ins strength between the two metals. Please read the chart below to see for yourself. TCS base material is nearly 100% stronger than that of the OEM base shaft. No hocus pocus cryogenic heat treat and shot peening process will get you anywhere near what our material difference does.
| Material | Tensile Strength | Yield Strength |
| — | — | — |
| 4130 Steel | 97,200 PSI | 63,100 PSI |
| 4340/300M Steel | 280,000 PSI | 230,000 PSI |
| Strength Difference in % | 96.92% | 113.88% |
Randy's Transmissions — Limited Warranty
Randy's Transmissions warrants all reman transmissions, torque converters and serviced components per the published Randy's Limited Warranty:
- 12 months / unlimited km on reman transmissions (street use)
- Lifetime on Randy's hard parts (gears, shafts) where stated
- Claims processed via Randy's Warranty Claims & Support form
- Original proof of purchase required
- Competition / off-road use excluded unless specifically stated
Fitment by Willys Workshop can be arranged in-house at our Oxley or Warana locations — workshop fitment receipts count toward warranty claim documentation.
Read the full Randy's Transmissions warranty terms →
Warranty claims are coordinated through Willys Workshop. Email sales@willysworkshop.com.au or call Warana (07) 5619 7869 / Oxley (07) 3377 3421 with your order number and a description of the issue.
