Noise from the gearbox when pulling away

Wikipedia is usually the best way to check this as it gives good information on versions and generations.

Terrano - Wikipedia

Wikipedia https://en.wikipedia.org > wiki > Terrano
Terrano may refer to: Nissan Frontier, a pickup truck; Nissan Terrano, a sport utility vehicle; Nissan Mistral (Terrano II), a sport utility vehicle ...

NISSAN Terrano 5 Doors Models by Year (1990-Present)

autoevolution https://www.autoevolution.com > Cars > NISSAN

Dec 7, 2022 - Complete timeline of NISSAN Terrano 5 Doors models and generations, with photos, specs reference and production years.

I'd guess that its related to the double gearbox removal. There are four engine/transmission mounts: one on the top side of the engine, one on the top of the transmission, and two on the center member. One or more might be loose or separating. The top engine mount is a common problem. Could also be loose sway bar mounts, or strut bolts on the uprights.

A rebuilt gearbox is a good idea.

I think removes the tyre both then check its gear box bearing noise or clutch plate bearing noise

Pull the gear box drain plug and check for heavy metal stuck to the magnet. I suspect that the clutch in-put shaft bearing has failed. If so you will have to have the gear box rebuilt as the metal will have affected the other bearings

you have 2 choices either the clutch is not disengageing properly or the gearbox is shot.put the car in first,put the clutch pedal down, then start the car and if its trying to pull away before you take you foot of the clutch you have you answer....if its the clutch cable you can adjust it..

manual ,thank heaven ,dont see many autos here in spain,right without driving car so i can hear it then it stands two possibilities ,when clutch is depressed you hear a noise like a grinding squel ,this is the thrust bearing ,if you hear a rumbling noise that disappears when clutch is depressed then this is lay shaft bearings ,Now also the problem can be the fingers on the clutch plate are worn and the bearing is pushing the clutch plate fingers down but if one or two are worn away then the thrust bearing is being pushed through the pressure plate ,either way a new clutch is need and as these vehicles are rear wheel drive they are not difficult to renew ,Just have to make yourself a clutch alignment tool from a broom handle .Dont be scared of it they are not that difficult to do just dirty and messy thats all the hardest part is aligning the clutch so the spigot shaft goes through easly and you dont have to struggle pushing the gearbox in

TAKE IT BACK WHERE THEY DONE THE LAST LOT OF WORK and tell them to do the complete job again as it sounds like a con job to me as a wheel aligment should last for a year a least and the grinding is in the braking system and something must still be bent ,
Its still under warranty dont pay any more..

Got to AAMCO for a free inspection.....best part....IT'S FREE!!!!! They will tell you what is wrong and will NOT perform maintenance without your consent.