Toppa
23rd January 2013, 08:25 PM
Disco 2 TD5 Auto with 275,00kms
If possible I would like to know how to test which component is the source of my backlash before I go spending thousands on what i think it might be.
The backlash i get when coasting to a stop from say 60 kms/h almost feels like i get hit by a car from behind. Just before i brake to a halt, it clunks from 3rd to 2nd, then moments later from 2nd to 1st. Also similar to dropping the clutch in a manual. Nasty.
I have just put a Tom Woods DC shaft in the front which helped smooth things out a little and got rid of my vibrations (centre bearing was shot and i'd already rebuilt it once before so it was an upgrade I was already planing)
Rear tailshaft Rotoflex and uni look good
My initial thoughts were the Auto - ive seen a fair increase in fuel consumption - but ive added plenty of wind resistant accessories - still i dont think it accounts for all of the increase. I performed the stall test and it fell within acceptable rev range.
However, when changing the T/case oil last service, there was evidence of water. Could this have degraded bearings or gears in a way to exacerbate backlash?
Diffs are also a chance I suppose?
Its never been driven particularly hard apart from my last trip to the high country where the auto overheated - 150 deg C on my madman and dash light on. id stop and let the auto cool down as soon as this happened. I put this down to mud in the auto trns cooler and low oil volume in the auto due to a slow leak, but not 100% sure of the oil level theory. I serviced the auto (filter gasket and oil) on my return. Oil was brown when dropped.
The auto changes pretty well on the upshift, but there is a noticeable delay and clunk when putting the disco in reverse
SO, can i remove shafts and wobble / rotate etc where excessive play will tell me this is a problem. What other tests should I try? I just want to formulate a plan of attack - ie purchase a recently reco'd t/case or auto and have a specialist remove old and install new.
Its my daily driver so as much as im pretty mechanically minded, the T/case or auto are not going to be changed in my driveway like i'd normally do.
OR am i better to take it to a driveline specialist and get them to diagnose it - like A+B in Dandenong.
Money is tight hence why looking at good s/hand rather that reco'd - false economy probably?
If possible I would like to know how to test which component is the source of my backlash before I go spending thousands on what i think it might be.
The backlash i get when coasting to a stop from say 60 kms/h almost feels like i get hit by a car from behind. Just before i brake to a halt, it clunks from 3rd to 2nd, then moments later from 2nd to 1st. Also similar to dropping the clutch in a manual. Nasty.
I have just put a Tom Woods DC shaft in the front which helped smooth things out a little and got rid of my vibrations (centre bearing was shot and i'd already rebuilt it once before so it was an upgrade I was already planing)
Rear tailshaft Rotoflex and uni look good
My initial thoughts were the Auto - ive seen a fair increase in fuel consumption - but ive added plenty of wind resistant accessories - still i dont think it accounts for all of the increase. I performed the stall test and it fell within acceptable rev range.
However, when changing the T/case oil last service, there was evidence of water. Could this have degraded bearings or gears in a way to exacerbate backlash?
Diffs are also a chance I suppose?
Its never been driven particularly hard apart from my last trip to the high country where the auto overheated - 150 deg C on my madman and dash light on. id stop and let the auto cool down as soon as this happened. I put this down to mud in the auto trns cooler and low oil volume in the auto due to a slow leak, but not 100% sure of the oil level theory. I serviced the auto (filter gasket and oil) on my return. Oil was brown when dropped.
The auto changes pretty well on the upshift, but there is a noticeable delay and clunk when putting the disco in reverse
SO, can i remove shafts and wobble / rotate etc where excessive play will tell me this is a problem. What other tests should I try? I just want to formulate a plan of attack - ie purchase a recently reco'd t/case or auto and have a specialist remove old and install new.
Its my daily driver so as much as im pretty mechanically minded, the T/case or auto are not going to be changed in my driveway like i'd normally do.
OR am i better to take it to a driveline specialist and get them to diagnose it - like A+B in Dandenong.
Money is tight hence why looking at good s/hand rather that reco'd - false economy probably?