dear Xulfiqar bhai, i hope you are fine and best in health and spirit. as you might remember i am the guy who is doing a Skyline r32 restoration project, its a 4 door from lahore and you know the rest of the story. well the car is up and about and performing very well. i changed the enigne from a VVTI to a non-VVTI 1jzgte twin turbo. the only problem left with it is a knock knock( or a backlash) sound from the differential which only comes when i move the car from stand still in 1st gear or in reverse on low rpms. if i make a combination of clutch and higher revs then the sound is less but still there. the movement is not smooth and car moves in reverse in little jerks with the noise but once i let go off the clutch completely then the sound vanishes.
i am sharing the link to a video on youtube which is exactly the same thing happening with me. i have got the differential re-shimmed properly but no luck. please guide me further and help me to diagnose the problem.
https://www.youtube.com/watch?v=mDfIqepTDFE ( i lifted the car on a lift and did the same, i have same noise in diff)
https://www.youtube.com/watch?v=Qs92lecjU30 ( notice the clunk clunk noise in 1st and reverse )
regards,
Ali shehzad