Also known as: t18, t-18, t19, t-19, borg-warner t18, t-18a
Borg-Warner's T18 and T19 — cast-iron four-speed manuals for trucks, in Fords, Jeeps and International Harvesters.
⚑ The T18's first gear is a crawler, unsynchronised and very low — around 6.3:1. That is the design and not a fault: it is meant to be selected at a standstill, and a complaint that it will not go into first while moving is the gearbox working as intended.
The T19 is the same box with a synchronised first and a much taller ratio, which is why the two feel completely different to drive despite sharing a case.
They are almost indestructible and endlessly rebuildable, which is why they outlived their vehicles and are still fitted to things they never came in. A surviving one has very often been moved at least once, so the input shaft and the bellhousing pattern are the first things to establish.
Borg-Warner's manual gearbox business became Tremec, which is where the later material and much of the parts supply now lives.
Cars fitted with this gearbox
2 generations. Only where a source names the model and the generation together — a gearbox is documented as a product far more often than as a fitment, so this list is deliberately shorter than the truth.
Information, not instruction
CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.
Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Community experience
Be the first to write this up
Nothing posted about this yet. Whatever you found is worth writing down — even a dead end saves someone the same afternoon.
What makes one worth reading:
- The car — make, model, year and engine. The same fault behaves differently on each.
- What you measured, not only what you replaced.
- What actually fixed it — or that nothing did, which is worth knowing too.
Sign in or create an account to add what you found about Borg-Warner T18 / T19.