Gearbox Clutch CVs - Gearbox type swap
HarryMann: T25s can have their 4 speed boxes swapped for 5-speed and vice versa. Selector rod layouts are the main gotcha. Diesels are slightly different rear selector rod detail; TD diesels have different front gate boxes (wider cooling tunnel)
yankiecamper: I've changed my old 4 speed diesel box for a 5 speed turbo diesel one ive removed all the four speed linkage and replaced it with the 5 speed linkage but now i cant get it to work its all really stuff and tight can i put a 5 speed box and linkage into my 1981 van or are the chassis different i.e. the holes that it all goes though.
any help would be gratefully received
metalmic8ey: Have you replaced ALL the linkage from g'box up to and including the gear stick and its mounting box?
yankiecamper: Yes I've changed the whole lot from box to gear stick its all just really tight I wondered if there was any diffrences under the vans on later models for the 5 speed selector rods?
dug: Just a thought, if i remember correctly the long rod has a dip to clear the cross member near the back, it could be you have this upside down and its rubbing... I may be wrong but im sure my mate had a similar problem.
SyncroG: The vans factory built as Turbo diesels have a different cab floor with extra large air duct for the rad fan, hence the gearstick houseing below the stick is different and mounts underneath the floor rather than in it (?) so the leaver is in the same place relative to your seat. Don't know what would happen if you fit a TD houseing on a non TD floor (asuming there are only the 2 different floor types, don't know if early stuff if different) but it probably won't work as it'll be in the wrong place - could be the route of the problem.
yankiecamper: Right peeps! I've done it on the 4-speed linkage there is an extra bracket which my 4 lb lump hammer removed last night! Now its all good, it's as free as a bird . Many thanks. NB. Extra bracket was making it bind..
Also read:
