[_zaclemore]

I also read up on the AR5 threads about this vibration, if it is a driveshaft angle problem, which it seems to be, a lot of stress has been relieved from me. Also, to keep on topic, how long is your guys' AR5 driveshafts? I read on the AR5 swap thread that it should be 51', but my engine's being build so I can't measure.

 

[_zaclemore]

I just finished the swap. My measurement was 50.75 from the 6 bolt output flange with no adapter to the diff. The driveshaft DM sent has a telescoping front piece I'm not sure if they've always come that way but I'm sure the telescoping helps for variances in length and angle. So far I haven't noticed any vibrations but I haven't put that many miles on the car since the swap.

Amazing answer, thank you so much. The telescoping action is to account for the off measurements, but you'd think since they offer all OEM parts, they'd know this measurement already? Also glad to hear you don't have any vibrations. Since my motor's away I can get the final pieces in my hands and start driving sooner than later.

 

[_zaclemore]

I'd tell you if I was able. I ordered a driveshaft from Xcessive and they sent me the wrong size. They're going to fix it, just annoying after confirming the length. One thing that did help me though, was tightening the bolt on the transmission in the middle of where the CV adapter goes. Big staked bolt, just put it in reverse and hit it with the impact for a sec. Mine was loose, as many are, and the car feels a lot smoother up to 65, but not perfect yet. I suppose the CV shaft will fix it fully. I also have poly diff bushings and subframe supplement bushings.

 

[_zaclemore]

That's good to know, mine developed the vibration at certain speeds its the worst from 60-70 and 90-100. I was thinking about ordering one from xcessive. I'll have to have them triple check the length if I do. Were they pretty quick making it or did it take them a while?

Also when you say put it in reverse do you mean the bolt is a reverse thread? or to put the transmission in reverse before tightening the bolt?

Took about 3 weeks and I felt every bit of it. Felt good to have everything apart only to find out it didn't work. On tightening, just do whatever way won't spin the transmission, if not reverse than 5th I guess. You just need to get it tight. It's staked, but clearly that means nothing, idk how to restake it so just get it tight enough.

 

[_zaclemore]

Did you ever get the right length Driveshaft from Xcessive? Really curious if that fixes the vibration, now that I've got mine turboed and tuned the vibration definitely is a bit more concerning.

Yup I got it back about 3 weeks ago. It's been great ever since, but I'd triple check to make sure they do it right. Way smoother around town as well, feels like a Lexus again.

 

[_zaclemore]

I did have the DM one before, I gave both them my measurement of 50.5 inches. I'd say give them your same measurement. There is some room for error in their shaft, but not much at all.

 

[_zaclemore]

Finally went to the only driveline shop in my area to see if they'd try to balance my DM shaft, didn't really get the vibe that they gave a shit so that's gonna be a no go. Decided to pull the trigger on the xcessive driveshaft, hoping for some good results. The vibration is getting pretty unbearable especially at higher speeds. I'm hoping the xcessive one holds up ok, the CV joint seems a little thin @_zaclemore how much power is your car making?

They rate their steel 3" shafts at 850. Whether that's true or not who knows. I never got a tune but it's been holding up fine on daily duty. I've been over 100mph (at the track of course ) and it feels great. Almost like a transmission with a CV joint needs a CV joint to be smooth.