Just in the middle of that problem. I got the normal sj410 gearbox ,only to found out that the very early sj410 (1982) had a slightly different gearbox . Mainly where the mounting is attached to the chassis. I do not know if there are any 1981/83 gearboxes leftjuncopartner wrote:The very early SJ410 gearbox up to about 1983 is very similar to the LJ80, but is not interchangeable, however it does share some common components and the gears are interchangeble but have different ratios, the ST90 gearbox is also very similar to the LJ80 and also shares a lot of common components and the gears are also interchangeable but have different ratios. The later gearbox, as stated, is different, and quite a bit larger so I would imagine that a lot more of the components would be different (larger?). But to be fair I havn't had to go inside one yet. so can't speak from experience.
