Driveshaft vibration

[Spazz]

S1 Rb25detalright ive had this problem for a while now , ever since i had the motor swap done, i would get vibration at anwhere between 55-60 mph, and would seadily get worse whith increased speed.I had the driveshaft balanced today to within 3 grams... there are some marks on the input shaft that goes into the transmission.Has anyone had this problem before?

Jan V.

[Sil240]

Check the rear flange where the Dshaft bolts to the flux capacitor. (aka diff)

My friend had the same problem and his bolts were loose.

Unless your using some kinda two piece shaft.I had the same problem with the center u joint going bad.

[Joe]

you sure its not wheel balance?

[Spazz]

fairly sure joe, but at this point im willing to do anything to eliminate it.Back when the car was KA powered there were no vibration issues.

[Joe]

ive seen weirder stuff happen.

vibration can appear in an instant if a weight gets flung.

always start with the easiest stuff first

[Spazz]

haha i figured that it was because of my old subframe bushings that were 100% rotted away in the 2 closest to the front that gave about1.5 inches of play up and down. that and all my struts were blownSil240- flange doesnt move, just checked it, all my bolts get medium locktight

[nissanman04]

driveshaft carrier bearing maybe?

[Darius]

wheel lug nuts tight?

[Sil240]

Well kinda good to hear.Slap some new urethane or some solid ones in there and you'll be good.

FYI to get the old ones out is a PITA.!!!!You may have to burn them out, most likely.You can get the whole bushing set for $110 on egay.

[Spazz]

i just put in alum ones , it was 69$ ebay specialdarius- wheel lug nuts r tight.Nissanman04-its a 1 peice, unless its the bearing inside the transmission, im not sure how to remove that bearing/ bushing...

[nissanman04]

if it's one piece then nevermind...

[Sil240]

So those ebay aluminum bushings are garbage???

[Spazz]

nope , they're a tight fit tho, i froze em for 4 days and then pressed them in with a bolt&nut, 2 large washers, 2 smaller washers, and lotsa grease. eliminated my thump and wheelhop

I grabbed my dial indicator from work, and ill check the runout on the driveshaft Vs. differential tomorow

[Yellow4g63]

Did you use a mount kit? Maybe the trans isn't straight? I did that once lol, then turned around and fixed it.

[Spazz]

yea but im gonna try the rb25 transmission crossmember

[Spazz]

alright the problem actually turned out to be my downpipe, its putting pressure on the steering columm and transmission housing.... I used my dial indicator to check runout yesterday, got a peak runout of .005 thanks to everyone who helped outJan V

[Sil240]

What downpipe are you running??Or are you talking about the Turbo outlet?Do you have a Turbo out/Downpipe all in one?

[Spazz]

im using 2 3/4' spacers along with an ebay dp modded to fit, but it has no flex joint in it.gonna fix that sometime in the future