93 RX-7

Hey guys,

I've seen it mentioned in before, but can't find it via search. What is the likely cause of getting a bump in the drive train when quickly releasing the accelerator? I suspect its a bearing somewhere. It feels kind of like the rear end is catching up with the front end.

Also, if you what it is, could you give me the approximate location? When it comes to the tranny I'm lost.

Thanks,

93 RX-7

Thought I'd run it by you guys one more time. Any ideas?

Flybye

Does it feel like it is coming from inside or outside the tranny?

93 RX-7

Its really hard to say, but I'm feeling in the stick or pedals, so I guess I'd say outside.

spooledUP7

I have the same issue, but I have been putting it off since I am planing on changing my bushings. That is, until yesturday when I got a hair up my butt to go pull of the rear wheels. I could not find the direct cause since I couldn't actively replicate the noise by hand. It wasn't until I was tightening the lug nuts that I was able to hear the click. With on hand pulling on the stock lug nut bar and the other feeling for the click, I was able to narrow it down to the lower control arm and the straight bar that's connected to it and the chasis. Pretty technical I know, but I could feel the clunking near that area. I also had one wheel touching while the other was in the air. After looking in the shop manual for the exact word for that "straight bar" I noticed that there are plenty of areas that could cause the clunking, including the universal axle joints. If I find anything more I will spread the news, but for now I think that I will try hitting the search for some help.

93 RX-7

On the same note, how much play should the rear wheels have when:

Off the ground

park brake released


When I had mine up, I thought I had a lot more play than I should. I've not been able to find anything in the manual. I suspect that you could be right with universal axle joints or possibly in the diff.

the_saint

Perhaps you mean the trailing arms.


btw there is no play in my rear wheels, or front wheels for that matter.

hope you sort things out


thesaint

t-von

iTrader: (8)

Way back from the dead. I'm having the same problem as above.

When I was under the car removing the PPF, I rotated the axle to check for play. I could rotate it about 1/2". I had the parking brake engaged and the shifter in neutral. For a long time I could always notice a thud when driving. It would happen when I switched gears. You would also notice it when cruising. If cruising at a steady paste, I would get off the gas and you will feel the thud. Once on the gas again you will feel it again. It would appear that the play in the axle is causing this problem (load/unload). Is it normal for the axle to rotate that much? If not what can I do the tighten it up? Now that the drivetrain is tighter, the thud is now more apparent. My axle bearings look to be fine and there are no vibrations with the car.

Keep in mind I first started to feel this problem when I installed my stage 3 sprung 6 puck clutch. That was 2 1/2 years ago.


I have solid diff mounts
Solid longitudinal trailing arm bushings
Reinforced PPF
New pillow ball bushings.