T5 Manual Trans for Ford 1985-1986 Mustang, 5 Speed

Description

Prevent gear jump-out under 265 lb-ft sustained V8 torque while maintaining low internal lubricant temperatures across demanding regional highway transit routes using the BorgWarner T5 Remanufactured Manual Transmission engineered for 1985 to 1986 Ford Mustang sports models powered by the 5.0-liter High Output V8 engine.

Upgraded World Class cast aluminum housing construction integrates tapered roller bearings on the countershaft to eliminate shaft spread under heavy acceleration. Steel synchronizer blocker rings feature friction material linings on first and second gears to halt high-RPM gear grind. Micro-polished gear tooth faces reduce parasitic friction and operating temperatures. Total dry weight registers 75 lbs. Fluid capacity requires 2.8 quarts of synthetic Mercon ATF fluid introduced through threaded magnetic ports.

Key Features of BorgWarner T5

Fox Body enthusiasts and restoration shops choose to buy BorgWarner T5 remanufactured transmission units to upgrade older non-world class gearboxes with modern tapered bearing durability. Every rebuilt unit undergoes complete inspection to verify shift fork pad clearances and bearing preload settings.

• World Class tapered roller countershaft bearings prevent gear spread under load.
• Friction-lined steel synchronizer rings stop high-RPM gear grind between 1-2 shifts.
• Induction-hardened 8620 steel cluster gears absorb 265 lb-ft continuous input torque.
• Hardened shift rail detent plungers prevent gear jump-out under hard deceleration.
• Micro-finished gear teeth deliver whisper-quiet operation across all forward speeds.
• Four-bolt bell housing pattern mounts flush to factory 5.0L bellhousing castings.
• Tested BorgWarner T5 gear assemblies provide crisp manual gate engagement.
• Viton front and rear seals prevent fluid loss under high operating temperatures.

World Class Five-Speed Torque Thresholds

The 5-speed manual gear set provides ratios featuring 3.35:1 in first, 1.93:1 in second, 1.29:1 in third, 1.00:1 in fourth, and 0.68:1 in fifth gear overdrive. Continuous duty designation supports up to 265 lb-ft continuous input torque at 3,200 RPM. The 0.68:1 overdrive ratio optimizes highway cruising efficiency. Natural air circulation across housing ribs maintains lubricant sump temperatures below 175°F under continuous operation.

V8 Clutch Spline Driveline Interface

A 10-spline 1.0625-inch diameter input shaft seats into standard 10.5-inch clutch friction discs with zero spline bind. The rear output shaft incorporates a 28-spline slip yoke interface with dial indicator runout held below 0.0018 inches. The tailhousing accommodates 7-tooth or 8-tooth speedometer drive gears to match rear axle ratios.

World Class Gearbox Operational Field Rules

Verify clutch quadrant adjustment to ensure complete clutch plate disengagement before initial road testing. Fill the transmission case through the side check port using approved synthetic Mercon ATF fluid until oil reaches the threads. This unit is not engineered for closed-course drag strip racing, extreme rock crawling, or gross combined vehicle weights exceeding factory chassis tow limits.

• Inspect casing seams and extension housing rear seals for seepage each shift.
• Drain ATF fluid and clean magnetic drain plugs every 30,000 miles.
• Inspect clutch cable quadrant teeth and firewall adjuster tension every 12 months.

Fox Body Performance Transmission Crate Manifest

Covered by an industry-leading 3-Year / 100,000-Mile commercial fleet warranty covering replacement components and certified shop labor. Each secured shipping crate contains one remanufactured manual transmission, new throwout bearing, speedometer gear clip, installation instruction manual, and signed rotational inspection report.