Warranty & Support4 min read
Post-Install Transmission Troubleshooting Hub
Start here when a reman transmission misbehaves after install — no-shift, slip, leak, reflash, and cooler flush guides with warranty prep links.
Quick Answer
Use this hub when a **reman transmission** acts up after install. Start with vehicle-side checks (fluid hot level, reflash, cooler flush) before assuming a defective unit — and call warranty for **pre-authorization** before removal.
P1 — symptom guides (start here)
- [Won’t shift after install](/blog/reman-transmission-wont-shift-after-install)
- [Slip and shudder after replacement](/blog/transmission-slip-and-shudder-after-replacement)
- [Fluid leaks after replacement](/blog/transmission-fluid-leaks-after-replacement)
- [Reman transmission failed within 500 miles](/blog/reman-transmission-failed-within-500-miles)
- [First 3,000 miles setup checklist](/blog/first-3000-miles-after-reman-transmission-install)
- [Check engine light within 500 miles](/blog/check-engine-light-within-500-miles-reman-transmission)
- [Transmission leaks in first 500 miles](/blog/transmission-leaks-first-500-miles-after-install)
P2 — deeper diagnosis
- [When your transmission needs a reflash](/blog/when-transmission-needs-reflash)
- [Torque converter shudder vs bad transmission](/blog/torque-converter-shudder-vs-bad-transmission)
- [Valve body or software issue](/blog/valve-body-issue-or-software-issue)
- [Flush the cooler before install](/blog/flush-transmission-cooler-before-install)
Before you file a claim
- [Pre-authorization before removing the unit](/blog/pre-authorization-before-removing-unit)
- [Documents required for a warranty claim](/blog/documents-required-warranty-claim)
- [Warranty policy](/warranty)
FAQ
Should we remove the transmission to diagnose?
Call warranty first — document checks and get pre-auth before R&R.
Where do I activate warranty?
[14-day activation rule](/blog/warranty-activation-14-day-rule) · account order page
Related on Expedia Parts
- Warranty policy and Expedia Protection: /warranty
- Warranty activation — 14-day rule: /blog/warranty-activation-14-day-rule
- Pre-authorization before removing the unit: /blog/pre-authorization-before-removing-unit
- Documents required for a warranty claim: /blog/documents-required-warranty-claim
- Reman transmission won’t shift after install: /blog/reman-transmission-wont-shift-after-install
- When your transmission needs a reflash: /blog/when-transmission-needs-reflash