Rear End Knock

[kris_pran]

Hey guys

Ive seemed to come across a strange knock that occurs in a 99 legacy b4 auto when the gears change down from 4th to 3rd for example if i were to overtake somebody on the motorway, it knocks at the back (sounds like the diff) every time it kicks into 3rd gear. Could it be the diff bushes or diff is stuffed? Said car has done 170000kms

Also another weird thing i noticed is that approaching roundabout or somewhere if i had to slow down/let off the accelerator completely and put my foot back on the accelerator the car seems to struggle to find which gear it is in and over revs and kicks(slight jolt not a knock) into gear. Is this normal?

Have attached some photos of diff bushes. Do they look woren out? ???

[DRFVDR]

Those bushes are not the best, they are a prick to replace, Autolign do a kit that fits NEW bushes to help stop those bushes from wearing out so quick

[Stoffa]

when was the last time your trans was serviced?

[kris_pran]

thank you will get in touch will autolign.

stoffa - unsure of when it was last serviced. Oils in the gearbox are at correct levels and dark yellow in colour and looks pretty rich/thick too.

[titian]

check rear gearbox mount...probably stuffed Those diff bushes are also stuffed...Replacement required :\'(

[kwikaus]

Someone will correct me if I am wrong but isn\'t yellow fulid what they use in Japan?

[kris_pran]

Well i finally got around to replacing all the driveline fluids and whatta ya know the knocks and odd jolts from gear changes have gone

..... Well well its seems the car has come up with a new problem which i will post on motor&turbo section. Dang i cant catch a break with this thing