rattles drive me a bit nutty and when I can't find them its even worse.
if your chasing a rattle that you just can't track down, try this.
cut 2x 3"(or so) pieces of 5/8th(or so)heater hose. (you can trim them down latter if it works)(or use smaller or larger hose as you need may be)
open the hood, place a hose under each of the hood hinges, so they sit in the rain chanel on the body side, close the hood.
drive and see if any of those crazy rattles are gone.
For me, this worked on all my 40 series.
on my 45LV, I have has this thing for 13 or so years, its always had a "clunk" under the driver floor or the trany hump, for years I checked and messed with stuff, it really sounded(and you could feel it) like the 3 on the tree linkage was hitting the floor under my foot, everyone(mechanic's included) that has been in it agree'd....it had to be under the floor. I can't tell you how many times I tried to adjust or do something to try to make the linkage not clunk(even though there was no real obvious spots it seemed to be rubbing or clunking)
So last summer I put a OME suspension on it, part of me hoped(but knew better) it may take care of the "clunk" it didn't, but it did get rid of a bunch of other little rattles and stuff. I was aware the hood hinge(pins) were a little loose but the hood didn't move or rattle, had new bumpers, rubber and hold downs.
One day(after I had burned my knuckles again from messing with linkage) for no real good reason I put a piece of hose under the hinges........and the clunk went away, its GONE GONE GONE GONE!!!! and its still gone (got 3000 miles on it since, still no noise)
on my 82 fj40, its all original and never has had many rattles but last year a "clunk" also started under the tranny hump, I looked and nothing I could find under it seemed to be causing it. Few weeks ago I redid all the window felts/rubbers(but not the door to body seal) and readjusted the doors, those rattles were now gone., now it was time to find the "clunk" Odd part was it didn't make noise when I would 1st drive it it, but it did if I parked it for a short time((but was still warm) and then drove again........how odd is that? then I remembered a few year ago I had another odd noise(sounded like a bad speedo cable) that only started after the 40 had warmed up, in that case it was the hood hold downs, they were new but I forgot to put new bumpers on the body, new rubber and the noise was gone. It seemed that the springs once they were warm....got looser and started to make this crazy noise in the cab, it was like something coiling and uncoiling(and speed, gear etc wouldn't change it)
So back to the floor clunk in the 40.....this morning I cut 2 pieces of hose, put under the hood hinges(which were not worn out or loose) and guess what? the clunk under the tranny hump is gone
on the 45LV I did a similar trick on the door limiters, they were the last of the rattles I had, I took some hose, split it and slipped it around the rod so when the door is closed the rod is now covered in rubber and doesn't rattle. I need to open up the doors again and this time I will just slip the hose over the rod(and not split it)
my 100 series has more rattles now than my 40/45's (but i cured a few of those too)
if this helps great, if not thanks for reading.
if your chasing a rattle that you just can't track down, try this.
cut 2x 3"(or so) pieces of 5/8th(or so)heater hose. (you can trim them down latter if it works)(or use smaller or larger hose as you need may be)
open the hood, place a hose under each of the hood hinges, so they sit in the rain chanel on the body side, close the hood.
drive and see if any of those crazy rattles are gone.
For me, this worked on all my 40 series.
on my 45LV, I have has this thing for 13 or so years, its always had a "clunk" under the driver floor or the trany hump, for years I checked and messed with stuff, it really sounded(and you could feel it) like the 3 on the tree linkage was hitting the floor under my foot, everyone(mechanic's included) that has been in it agree'd....it had to be under the floor. I can't tell you how many times I tried to adjust or do something to try to make the linkage not clunk(even though there was no real obvious spots it seemed to be rubbing or clunking)
So last summer I put a OME suspension on it, part of me hoped(but knew better) it may take care of the "clunk" it didn't, but it did get rid of a bunch of other little rattles and stuff. I was aware the hood hinge(pins) were a little loose but the hood didn't move or rattle, had new bumpers, rubber and hold downs.
One day(after I had burned my knuckles again from messing with linkage) for no real good reason I put a piece of hose under the hinges........and the clunk went away, its GONE GONE GONE GONE!!!! and its still gone (got 3000 miles on it since, still no noise)
on my 82 fj40, its all original and never has had many rattles but last year a "clunk" also started under the tranny hump, I looked and nothing I could find under it seemed to be causing it. Few weeks ago I redid all the window felts/rubbers(but not the door to body seal) and readjusted the doors, those rattles were now gone., now it was time to find the "clunk" Odd part was it didn't make noise when I would 1st drive it it, but it did if I parked it for a short time((but was still warm) and then drove again........how odd is that? then I remembered a few year ago I had another odd noise(sounded like a bad speedo cable) that only started after the 40 had warmed up, in that case it was the hood hold downs, they were new but I forgot to put new bumpers on the body, new rubber and the noise was gone. It seemed that the springs once they were warm....got looser and started to make this crazy noise in the cab, it was like something coiling and uncoiling(and speed, gear etc wouldn't change it)
So back to the floor clunk in the 40.....this morning I cut 2 pieces of hose, put under the hood hinges(which were not worn out or loose) and guess what? the clunk under the tranny hump is gone
on the 45LV I did a similar trick on the door limiters, they were the last of the rattles I had, I took some hose, split it and slipped it around the rod so when the door is closed the rod is now covered in rubber and doesn't rattle. I need to open up the doors again and this time I will just slip the hose over the rod(and not split it)
my 100 series has more rattles now than my 40/45's (but i cured a few of those too)
if this helps great, if not thanks for reading.