Challo Posted September 2, 2010 Share Posted September 2, 2010 Hi, i have a 110 300tdi with an r380 gearbox. Unfortunately the gearbox has several issues. So i was thinking about upgrading to a td5 r380 gearbox. Waht i would like to know is can this be done? Cheers Quote Link to comment Share on other sites More sharing options...
dirtyninety Posted September 5, 2010 Share Posted September 5, 2010 Its the the same gear box, perhaps a slightly different suffix/prefix but nothing that will effect operation Quote Link to comment Share on other sites More sharing options...
yella 90 Posted September 8, 2010 Share Posted September 8, 2010 Its the the same gear box, perhaps a slightly different suffix/prefix but nothing that will effect operation now im sure the last time i fitted a td5 r380 the input shaft is longer Quote Link to comment Share on other sites More sharing options...
nicks90 Posted September 9, 2010 Share Posted September 9, 2010 but if the input shaft was longer it wouldnt be an R380 - it would be an R390 or more..... Quote Link to comment Share on other sites More sharing options...
rusty_wingnut Posted September 9, 2010 Share Posted September 9, 2010 Green thing is correct Quote Link to comment Share on other sites More sharing options...
Aragorn Posted October 3, 2010 Share Posted October 3, 2010 nicks90: the "380" is a reference to the maximum torque the tranny can handle - 380NM, not the length of the input shaft. TD5 input shaft is different to a TDi one, longer, and probably has different clutch splines and/or spigot bearing diameter too. You can use the box, but you'd need to strip it down and swap the input shaft for a TDi item. Quote Link to comment Share on other sites More sharing options...
Gilslandy Posted October 3, 2010 Share Posted October 3, 2010 yes spigot bearing diametre is larger and bell housing is bigger then a tdi one. so best thing is to use ur bellhousing with the new box and arrange the input shaft issue. gil Quote Link to comment Share on other sites More sharing options...
Badger90 Posted January 16, 2012 Share Posted January 16, 2012 im currently trying to do this conversion!.. from what i have done today. iv split them both and stiped it so i can remove the imput shafts and swaped them over, as i was re assembling it i realsied that the main bearing on input shaft is larger on the td5 then 300. so i used the 300 casing and front plate and the reassembled it again. while was doing that, after doing 6 bolts for the front plate and bolting the casing on it then didnt want to turn.. so i took it apart again and couted the teeth.. 32 teeth on the input shaft and the conecting gear on the layshaft. the bearing are the same on layshaft and from what i have measured the inner bearing for the iinput shaft is the same on 300 and td5 and the outer bearing is lager on the td5 and the 300 is smaller. so i took it apart again and put the td5 casing, front plat and main shaft back in and it was fine, turned lovely. i do look and layshafts and theyall have same tooth count. so the only thing i can think of is swapping the td5 main bearing onto the 300 input shaft. its not as easy you think, i was told that all that needed doing was swapping the shafts, but that isnt the case it seems. if anyone can shed some light then im all ears lol regards sam Quote Link to comment Share on other sites More sharing options...
simonb Posted January 17, 2012 Share Posted January 17, 2012 Late 300Tdi boxes - can't remember what serial number prefix but should be on Ashcrofts site - have larger input bearings - probably the same as Td5 - your 300Tdi may be an early one with smaller bearings. Quote Link to comment Share on other sites More sharing options...
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