After ideas on tail shaft and pinion angles.
I have a SPOA and i get vibrations when trying to sit on a constant speed. It doesn't seem to be there while accelerating or engine breaking.
So i guess i could say it only does it when there is no load on the shaft.
Does anyone have any ideas?
Pics would really help.
Cheers!
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SPOA Tail shaft angles
SPOA Tail shaft angles
When upside down, take belt off slowly!
Tailshaft angles with SWB's and SPOA's can get pretty marginal, especially with lift springs. you could try some wedges to roll the rear diff up a little bit to relieve the angle at the diff a bit. Did you set up the spring pads parallel to the old SPUA pad?
I think that most SPOA conversions roll the diff up a little bit to help.
Are you still running a stock length rear driveshaft? If so, it may be overextended, meaning it will be getting some play at the slip joint. this will cause vibration if it is lightly loaded.
As per the other posts, check the condition of the uni's, however the car is set up, the uni's will be running at a fair angle and they will have reduced life.
I have seen SPOA sierras bind their rear driveshafts when engine braking off road
so it is really important to get them spot on.
I think that most SPOA conversions roll the diff up a little bit to help.
Are you still running a stock length rear driveshaft? If so, it may be overextended, meaning it will be getting some play at the slip joint. this will cause vibration if it is lightly loaded.
As per the other posts, check the condition of the uni's, however the car is set up, the uni's will be running at a fair angle and they will have reduced life.
I have seen SPOA sierras bind their rear driveshafts when engine braking off road
so it is really important to get them spot on.[quote="greg"] some say he is a man without happy dreams, or that he sees silver linings on clouds and wonders why they are not platinum... all we know, is he's called the stevie.[/quote]
Should be aiming for parallel under load.
are you running lift springs? are you running a track bar?
maybe it's just too much angle with your current height.
are you running lift springs? are you running a track bar?
maybe it's just too much angle with your current height.
[quote="greg"] some say he is a man without happy dreams, or that he sees silver linings on clouds and wonders why they are not platinum... all we know, is he's called the stevie.[/quote]
It has 2 inch lifted springs and i don,t have a track bar.
Wondering if i should rotate the diff so the diff pinion and tail shaft are close to in line and go with a cardinal joint on the tcase end.
Thanks any way redzook. By the way good drive. I don't know the track at all but the picks look great!
Wondering if i should rotate the diff so the diff pinion and tail shaft are close to in line and go with a cardinal joint on the tcase end.
Thanks any way redzook. By the way good drive. I don't know the track at all but the picks look great!
When upside down, take belt off slowly!
Mine was set up with the pinion pointed strait at the T/case, seemed to work OK, but without a torque rod thingy, you will bind the uni's under offroading conditions. (with the pinion pointed up you will bind the uni's easier under power as the uni's are already closer)
" If governments are involved in the covering up the knowledge of aliens, Then they are doing a much better job of it than they do of everything else "
love_mud wrote:Mine was set up with the pinion pointed strait at the T/case, seemed to work OK, but without a torque rod thingy, you will bind the uni's under offroading conditions. (with the pinion pointed up you will bind the uni's easier under power as the uni's are already closer)
What do you mean by bind the uni? Mine have been ground out to allow for bigger angles if that helps.
Thanks for your help guys. I'll get some big wedges made and if that helps i'll rotate the spring perches.
When upside down, take belt off slowly!
ive got the same problem but mine isnt shaking its only whining. and mines SPUA!! Diff was recently reconditioned (New Bearings, collapsable spacer, seals etc) and ive only noticed it since then. I reckon my tailshaft between the transmission and t case is off balance cause i had to take it out to do the rear gearbox seal and couldnt work out which way it went when putting it back in. made marks and all that shit but when the time came to put it back in they made no sense!! Funny that!! 
hey guys with mine i rotated my diffs to 5 degrees positive and left it at that. on the rear i run a hilux shaft with cardan joint, and on the front i run a normal hilux shaft. with the added bonus being the bigger unis which take alot more angle. smaller unis will only take so much angle as they have a limit, so if u grind ur yokes out you will still chop out unis...
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