I am having bad driveline vibrations with an S52 swapped e30 on deceleration. I wish I had a video, but it sounds like the driveshaft or transmission is hitting the floorboard in a rhythmic fashion that is linked to the vehicle/engine speed. It does not happen while stationary. I can only replicate this when I accelerate, typically hard, then abruptly let off the throttle. To stop the vibration I usually speed up, slow down below ~30mph or press the clutch in. I have replaced just about everything in the driveline excluding the differential, engine and trans. The parts I have replaced in the last few months are as follows:
- Revshift 80a 24v swap mounts
- Garagistic 80a trans mounts
- New Meyle Guibo
- New aftermarket OEM replacement driveshaft with new CSB
- 3.07 LSD from e28
- 80a subframe, diff and trailing arm mounts
- stock untouched e30 axles and wheel bearings
I started the swap with the engine and trans mounts. I had a new CSB on the old driveshaft. The issue was observed before and after the replacement of the Guibo, driveshaft, and subframe mounts. Yes I have preloaded the CSB and installed the driveshaft per various manuals.
I called Revshift and they pointed to the trans mounts, so I decided to order new ones as I have been told a studded design is better than through bolt. They told me the trans mounts were roughly 1.3" and I measured the mounts to be roughly 1.25". I also noticed the driveshaft is pointed down in the CSB from the front of the car looking back.
This has been driving me crazy and I cannot figure out what the issue is
- Revshift 80a 24v swap mounts
- Garagistic 80a trans mounts
- New Meyle Guibo
- New aftermarket OEM replacement driveshaft with new CSB
- 3.07 LSD from e28
- 80a subframe, diff and trailing arm mounts
- stock untouched e30 axles and wheel bearings
I started the swap with the engine and trans mounts. I had a new CSB on the old driveshaft. The issue was observed before and after the replacement of the Guibo, driveshaft, and subframe mounts. Yes I have preloaded the CSB and installed the driveshaft per various manuals.
I called Revshift and they pointed to the trans mounts, so I decided to order new ones as I have been told a studded design is better than through bolt. They told me the trans mounts were roughly 1.3" and I measured the mounts to be roughly 1.25". I also noticed the driveshaft is pointed down in the CSB from the front of the car looking back.
This has been driving me crazy and I cannot figure out what the issue is
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