Systems & Components
Components we have investigated end to end: what fails, which factory numbers supersede which, and which alternatives are documented.
GM 10L80 / 10L90 Control Valve Body — Supersession & Repair Options
The GM 10-speed valve body on backorder: the Gen 1 to Gen 3 factory chain, the calibration split, the in-place repair path, and what has already been ruled out.
RAM 2500 / 3500 ABS Hydraulic Control Unit — Backorder Options
68143491AA on national backorder: the factory supersession, the platform boundary that costs a cycle, and the rebuild path fleets actually use.
RAM 4500 / 5500 ABS Hydraulic Control Unit
The chassis-cab hydraulic control unit runs the 68195569 chain and never crosses with the pickup unit. Here is what that means before you order.
RAM 2500 / 3500 ABS Control Module — 68347098 Supersession
The ABS control module supersedes AA to AB to AC, and it is a different component from the hydraulic unit. Replacing one will not fix the other.
What isn't here yet
- GM 10L80 / 10L90 control valve body — fault codes: No diagnostic trouble code appears anywhere in the investigation record.
- GM 10L80 / 10L90 control valve body — programming: Programming is recorded as a verification gap on the valve-body family, not as evidence. It appears as a 'what to confirm' line on the primary page instead.
- GM 10L80 / 10L90 control valve body — recall / eligibility: The recall software mitigation exists only as a recovery-strategy note. No structured recall record, eligibility rule, or citation is held.
- RAM heavy-duty ABS — fault codes: No diagnostic trouble code appears anywhere in the investigation record.
- RAM heavy-duty ABS — programming: Scan-tool programming and the ABS bleed are recorded as verification gaps on every path, not as documented procedure. They appear as 'what to confirm' lines on the primaries instead.