o.k. sofar mrk5 is in the lead for the closest guess . . . anymore ?
CK5
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doubler people stop in i got a question ? UPDATE : found the noise 12/27/2020 !
- Thread starter sweetk30
- Start date
U-joint lobes hitting the crossmember? Didn't you put in a different one not too long ago?
nope not it .
Driveshaft bolts loose?
Shaft out of phase? Yoke nut not bottomed out?
Zip tie on the driveshaft
Holding on a bag of marbles...
Loose nut behind the wheel.
I'll die laughing if it was a lugnuts in the hubcaps.
done that to a guy 3 days in a row . 3rd day he just drove off with his middle finger flyin out the window .
o.k. here goes guys . 
2wd low hump floor pan clears a whole th400/203/doubler/205 combo ............ minus the very top of the ord tripple stick shifter mount bracket and was hard in to the floor 1/16" dimple up in the cab . found it cutting the hole for the 3 levers and then i took my prybar 36" long and jambed it up in there and bent the floor up for a good 1/8" of play room . the sound on that first test drive was 98% better . no more marbles grinding around . the floor was 1 HUGE amplifier of the normal sounds of a doubler .
2wd low hump floor pan clears a whole th400/203/doubler/205 combo ............ minus the very top of the ord tripple stick shifter mount bracket and was hard in to the floor 1/16" dimple up in the cab . found it cutting the hole for the 3 levers and then i took my prybar 36" long and jambed it up in there and bent the floor up for a good 1/8" of play room . the sound on that first test drive was 98% better . no more marbles grinding around . the floor was 1 HUGE amplifier of the normal sounds of a doubler .
and road test after swapping the atf for new 80-90 oil with 1/2qrt of lucus oil stabilizer in each box got even less noise .
but sadly i have work to do yet on the clunk .
its there in rear drive high & 205 rear low.
also there in rear high & 203 low.
its a lot less in front drive only . that level of clunk i could live with .
so i think its time to recheck pinion angles and shaft working angle and t-case rear yoke angle . prob pull the shaft of even just the 14ff and check pinion to ring gear play .
@Stephen
but sadly i have work to do yet on the clunk .
its there in rear drive high & 205 rear low.
also there in rear high & 203 low.
its a lot less in front drive only . that level of clunk i could live with .
so i think its time to recheck pinion angles and shaft working angle and t-case rear yoke angle . prob pull the shaft of even just the 14ff and check pinion to ring gear play .
@Stephen
rear axle is easier than going through 2 t-cases
Glad you got some of the noise worked out.
Now to see if my son's can find out what that weird noise is that just happens to show up. Thanks for the ideas.
Now to see if my son's can find out what that weird noise is that just happens to show up. Thanks for the ideas.
jeffahart
Newbie
I'm scratching my head on a clunk right now too. As you may know I just had my 205 and 465 rebuilt. I also replaced both front and rear shafts. I get a bad clunk on hitting and letting off the gas. I've always had some driveline slop, I have a detroit locker in a 14bolt. It's been bugging the crap out of me. New rebuilds and new shafts make me want new tight tolerances and no leaks(thought I would throw that in there).
Anyhow, guess what suppresses the clunk/clank. If I run 2HI with hubs locked it runs like a peach, like a dream come true. Unlock the hubs... clank clank clank. WTF? Guess I was biased on blaming the 14bolt and the locker. Now it looks like I need to retrain my ear!
Scratching my head. I will play with it some more this weekend.
j
For as good as a Detroit Locker is, it had a TON of slop.
Is your 4 spd a 10 spline unit? If so, the inherent slop of that set up plus the Detroit will create a noticeable amount of slop. Not ideal but the nature of the beast.
This is likely your problem unless you find a red flag somewhere in the drivetrain.
Is your 4 spd a 10 spline unit? If so, the inherent slop of that set up plus the Detroit will create a noticeable amount of slop. Not ideal but the nature of the beast.
This is likely your problem unless you find a red flag somewhere in the drivetrain.
jeffahart
Newbie
Ya, 10 spline. I've been thinking that locking the front hubs puts enough drag on the output shaft and it carries through to hold the drive shaft enough to suppress the backlash/slack from detroit locker and the 205 internals. And,I think the new bearings add to the over all slack too. A compound effect throughout the whole driveline. The noise doesn't really bother me but I just like to verify what's going on. I think my old ujoints and gummed up slip shafts may have been a bit of glue that kept the slack tighter pre-rebuild.
What do you think?
j
What do you think?
j
I agree that the front end could “tighten” up the drivetrain and mask the slack.
so have been driving it and with just the metal floor in place i am fairly secure in my noise location is in the t-case setup someplace .
there is a bit of a growl in a bearing someplace the faster it goes . also the clink is still there and if you dont shift it just right for the trans selection its a good solid CLUNK / SLAM .
i have drained the atf and went fresh 80-90 with half a qrt of lucus oil stabilizer in each the 203 and 205 . it muffled the noise a bit but i think there is a bad bearings or something going on inside . it should have been all good since i used a reman kit for both if i recall from almost 10 years ago . but maybe i didnt on the 203 box and this could be my problem spot i think .
i will keep a eye & ear on this and see how it goes . but since i dont drive a lot i think it might be fine till spring and then pull it and tear in to it . i do have a full gasket/seal kit for both the 203 and 205 on hand if i need to do it asap other than a part i might need for it .
there is a bit of a growl in a bearing someplace the faster it goes . also the clink is still there and if you dont shift it just right for the trans selection its a good solid CLUNK / SLAM .
i have drained the atf and went fresh 80-90 with half a qrt of lucus oil stabilizer in each the 203 and 205 . it muffled the noise a bit but i think there is a bad bearings or something going on inside . it should have been all good since i used a reman kit for both if i recall from almost 10 years ago . but maybe i didnt on the 203 box and this could be my problem spot i think .
i will keep a eye & ear on this and see how it goes . but since i dont drive a lot i think it might be fine till spring and then pull it and tear in to it . i do have a full gasket/seal kit for both the 203 and 205 on hand if i need to do it asap other than a part i might need for it .
wow . 
2 years to the day and i found this thread again .
and i pulled the doubler yesterday and blew apart the 205 and found a extra shim it didn't need in the 205 idler gear bearing stack . put it back in and no more play and much better on the bench .
got the whole setup back in today and re sealed and cleaned out both the 203 range box and 205 case .
need to go get some more oil and a test drive for the win i hope . otherwise i am not sure . . .
2 years to the day and i found this thread again . and i pulled the doubler yesterday and blew apart the 205 and found a extra shim it didn't need in the 205 idler gear bearing stack . put it back in and no more play and much better on the bench .
got the whole setup back in today and re sealed and cleaned out both the 203 range box and 205 case .
need to go get some more oil and a test drive for the win i hope . otherwise i am not sure . . .
