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shifty5
10-11-2006, 04:34 PM
does anyone know if an 81 rear diff has a different 3rd member offset than an 86?

i have a death wobble i'm tryin to find i think the 81 diff is offset a few more inches than the 86.

StinkFinger
10-11-2006, 04:40 PM
no there the same the 86 should be a wide track tho so you cant swich the shafts just the thirds

Big_Ern
10-11-2006, 04:46 PM
and death wobble doesn't have anything to do with the rear axle

StinkFinger
10-11-2006, 04:51 PM
unles he put eraly shafts into an ifs housing and is draging it around in 4 cause he cant figure out why the rear diff wont work

Big_Ern
10-11-2006, 04:53 PM
[wako]




.......................[!]23

StinkFinger
10-11-2006, 04:55 PM
[wako]




.......................[!]23


hey i could see recee doing it

Big_Ern
10-11-2006, 05:23 PM
valid point...............23

Murd0c
10-11-2006, 05:45 PM
I don't get it:rolleyes:

...........................

shifty5
10-11-2006, 06:47 PM
no its definately in the rear end, its like a shake or a shudder. and it looks like the driveshaft isn't straight in line with the diff, i dunno if its supposed to be like that.

flipper
10-11-2006, 08:52 PM
Mine is of to the side and my wobble comes from unbalenced 35"boggers.

GOT MUD
10-11-2006, 11:24 PM
mine never shook like that with my 35"mud kings that were balanced. and then i put 38.5swampers on it that are unbalanced and it shakes like crazy. i really don't think the offset should make much diff. think about it, the driveshaft's already at an angle up & down. whats a little sideward ginna do.

shifty5
10-12-2006, 11:06 AM
i think i got it figured out, apparently when i put my driveshaft back together the slip yoke was 4 splines out of phase.

jakerngr
10-12-2006, 02:03 PM
that would be a vibration not a death wobble

shifty5
10-12-2006, 02:49 PM
ya, thats why i corrected myself half way through the thread

StinkFinger
10-12-2006, 03:57 PM
are you sure you dident put a front third in the rear

shifty5
10-12-2006, 04:51 PM
well i didn't take the rear apart so unless someone has been working on my truck without me i'm gonna go with "yes i'm sure" hehe

StinkFinger
10-12-2006, 04:56 PM
you should take it to a shop and have them check for you

GOT MUD
10-13-2006, 11:37 PM
were the u-joints connect on the shaft and yoke, need to line up. if your 4 splines off it's probably gonna shake a little.

shifty5
10-14-2006, 10:24 AM
ya thats called drive shaft phase, i corrected that and it got better, i just bought a magnetic degree wheel so i might have to shim the diff i'll find out this afternoon. thanks for the input guys.

Big_Ern
10-16-2006, 01:05 PM
shimming the rear diff is only to change your pinion angle. It will not help any vibe's in the rear end unless they are driveshaft related. In which case you will want the pinion pointed at the t-case output if you're running a CV style u-joint up top. Otherwise the pinion should be parrallel to the t-case output.

boyzen
10-16-2006, 01:21 PM
dumb ass ,....................

Toyquad
10-16-2006, 01:52 PM
you should take it to a shop and have them check for you


i agree ... you dont wanna be running a front 3rd member in the rear.......

StinkFinger
10-16-2006, 02:56 PM
could be tragic have them check ypur muffler berings and halogen fluid while it's there

shifty5
10-18-2006, 01:36 PM
i'm a dumbass? the rear diff has never been touched, so it does not have a front 3rd member in it. as you can see in my previous posts its obviously the drive shaft. when i re-phased it it got better, now its gonna need some shimming to get it perfect.