The Saga of the 80 series clunk
Submitted: Monday, Aug 20, 2012 at 21:10
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120scruiser (NSW)
Hi all.
I posted this some time ago looking for help.
80 Series Clunk
I am clutching at straws now and am after somebody that may be experienced with the Landcruiser A442F transmission.
My vehicle is a 96 model HDJ80 with the 1HD-Ft and auto transmission.
It has a clunk when you come to a stop 90% of the time. On the odd occasion it doesn't clunk when you stop, it does when you take off and release the brakes.
So far I have had the rear diff overhauled, rear upper control arm bushes replaced, sway bar bushes replaced, new rear tail shaft, part time kit installed removed then installed again, kick down cable adjusted and idle speed checked. It is idling at about 725rmp.
I swear it feels like it is coming from the back but somebody mentioned to me about the anti clunk set up in these transmissions but I know nothing of these.
When I go down through the gears manually it still does it. It does it with the overdrive on or off, heavy or light braking.
Help please.
Scott
Reply By: Ross M - Monday, Aug 20, 2012 at 22:40
Monday, Aug 20, 2012 at 22:40
I would be taking the shockers off and checking the free sliding nature of each one. If just 1 is a bit tight and has a habit of partially seizing it will give a thump as it starts to move under final braking or takeoff.
Seeing you have overhauled the rest of the vehicle there isn't a lot left.
If it was the transmission it would do it as you slow down gently on a flat surface before rolling to a stop with no brake input, as it changes to 1st ready for takeoff.
AnswerID:
493299
Follow Up By: 120scruiser (NSW) - Tuesday, Aug 21, 2012 at 08:40
Tuesday, Aug 21, 2012 at 08:40
Great suggestion.
I want to replace the OME ones with longer travel shocks to suit my springs so this may be a good time to convince the SWMBO to
fork out the $$$ for new shocks.
I had a set sieze up on an old XY falcon once. Terrible ride.
Thanks for the suggestion.
Scott
FollowupID:
768897
Reply By: Mike R7 - Tuesday, Aug 21, 2012 at 10:03
Tuesday, Aug 21, 2012 at 10:03
Way back in the 70s, when I was
young and dumb, my ute developed a clunk on taking of or stopping. After crawling all over and under it and checking all the transmission/drive train, I looked under the
seat one day, only to find a can of coke that rolled back and
forth as I moved. Very embarrassing.
From then on, I always
check the simple things first.
Happy
trails, Mike.
AnswerID:
493310
Reply By: Member - Broodie H3 - Tuesday, Aug 21, 2012 at 10:16
Tuesday, Aug 21, 2012 at 10:16
I don't know to much about your previous thread, and I am late into the conversation,and you sound like you may have already considered this but here is my two bob's worth, I would
check the filter in the gear box and also it sounds like the gearbox mount is either loose or partially broken, as that is what was causing my clunking before I sold the vehicle. I took me for ever to solve, and I didn't solve it the mechanic at midland Toyota did. Good luck.
regards
Broodie H3
AnswerID:
493311
Reply By: Derek Jones - Tuesday, Aug 21, 2012 at 15:51
Tuesday, Aug 21, 2012 at 15:51
Have you checked your body mounts?
We had similar clunk in our LCruiser 100 series but from the front.
As it turned out one of the body mounts had loosened by very small margin (it wasn't noticeable to the naked eye) thus creating a clunking sound.
Might be worth a
check - since you are clutching at straws.
AnswerID:
493343
Reply By: gbc - Tuesday, Aug 21, 2012 at 20:11
Tuesday, Aug 21, 2012 at 20:11
Another 'maybe it'll help' post - My 80 had a clunk that I swore was from the driveline. Turned out body pan joins were rubbing, but sticky. Just drove a roofing screw straight through the overlapping body pan section and it fixed it.
This took a year or two to find and it drove me insane. I removed shocks, driveshafts, everything I could before I found it from sitting in the back
seat one day while someone else drove.
AnswerID:
493358