1967 model year · NHTSA recalls, manufacturer TSBs, and owner forum reports · Updated June 2026
According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 1967 MG MGB has 1 documented known issues. No issues are rated critical, indicating generally reliable ownership. Across all issues, repair costs range from $600 to $2,500. DIY maintenance guides at au7o.io.
On the 1962-1967 MG MGB 1800 B-series I4, the early MGB four-speed has synchromesh on only the top three gears (none on 1st) — the so-called 'three-synchro' box used through 1967. Its known weak points are the layshaft and its needle rollers (the original three-hole layshaft/laygear design is the fragile part) and the 2nd-gear synchro ring, which wears first and produces the classic crunch when shifting up into 2nd. Worn layshaft bearings give a rumble/whine in the gears and slop in the cluster. Left alone the synchros eventually let go and the box jumps or grinds.
On a rebuild, the community fix is to upgrade the internals rather than just replace like-for-like: fit the stronger larger 4-hole laygear (22H1301) with a quality layshaft and fresh needle rollers to cure the inherent layshaft weakness, renew the 2nd/3rd/4th synchro rings, and replace all bearings and seals. Done with the right parts, even a three-bearing-laygear box is good for 50,000+ miles. Many restorers go a step further and swap to the later all-synchro four-synchro box (1968-on) for everyday usability, and the most popular bulletproofing upgrade is adding a Laycock overdrive (or a modern 5-speed conversion) to drop cruising rpm and reduce strain. Drive sympathetically with a brief pause into 2nd to preserve the synchros.
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According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 1967-1967 MG MGB has 1 documented issues. The most frequently reported are: Weak Three-Synchro Gearbox — 2nd-Gear Crunch and Layshaft Wear. None are rated critical, but regular maintenance is recommended.
The 1967-1967 MG MGB has 1 known issues compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports. No issues are rated critical, suggesting generally good reliability. Regular maintenance following the manufacturer's schedule helps prevent many common problems.
Repair costs for known MG MGB issues range from $600 to $2,500, depending on the specific problem and whether you choose DIY or professional repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
The early MGB four-speed has synchromesh on only the top three gears (none on 1st) — the so-called 'three-synchro' box used through 1967. Its known weak points are the layshaft and its needle rollers (the original three-hole layshaft/laygear design is the fragile part) and the 2n… Repairs typically run $600-$2,500. Severity: medium.
Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.
