HIMNI RACING

I say blow it out, what ever it is. When it hits the ground or starts flopping around, then I know what to fix. Wish I could strap a friend under the car and get on it. I had to do that with the engine bay one time to find a boost leak..Damn.



Sorry to thread jack........

Jodoolin

Why have you discounted the drive shaft as the culprit? Pending failure of the front U joint will give you a clunk when launching or shifting in lower gears. Clunk at higher gears means the rear joint is failing. I've had two U joint failures in two different 90's. First was clunk and mild vibration and the second was vibration only (felt in both shifter and steering wheel).



If the U joint is really bad you will get up and down movement at the joint when you twist or push the drive shaft. It is not an absolutet test however. It may be worn enuf to vibrate bit not jiggle with only hand pressure stress/pressure.

pengaru

don't forget to check your camber link bushings when searching for a clunk from the rear. It's the only thing keeping the relationship between the differential and the subframe a (relatively) static one... so if it gets slop in it, you will definitely notice, because it will allow that elastic relationship between the diff and subframe to have some movement.

Pazuzu

I'm assuming you mean me.

I've had driveshaft failure in my other vehicle, I know what it feels like when they loosen up or fail. I'm not expereiencing that. Based on other reports, I'm 100% sure it's the diff mount.

Apex13B

I though I had a front diff mount go bad 3 months ago and replaced it. Then I recognized that the bushing that you are talking about was the problem, and had to replace those too.





2 weekends wasted

pengaru

yep, my car has a new clunk and I thought it was the diff mount but I checked today, and the diff mount looks fine. The clunk happens every time I go to engage the clutch, and you can feel it in the floor. I suspect it's the camber link bushings. It's starting to get too cold outside to **** with this stuff though

HIMNI RACING

yep, my car has a new clunk and I thought it was the diff mount but I checked today, and the diff mount looks fine. The clunk happens every time I go to engage the clutch, and you can feel it in the floor. I suspect it's the camber link bushings. It's starting to get too cold outside to **** with this stuff though [/quote]

I've replaced my camber link w/the on car ajustable one, still have the clunk. Talking about it pisses me off.....now I must to know what the hell it is.



any other ideas?.......

HIMNI RACING

hmmmm. I replaced my drive shaft. I checked the old one before I replaced it and the u-joints didn't have any play. But, I replaced it with a diff. one that I got from rx-7 heaven. clunl still there. The only play I can get from the drive shaft(s) is at the yoke, (meets up with the trans) I've been told, that play has to be there for some reason............any clue???

HIMNI RACING

$5 to the 1st person that tells me what it is

Pazuzu

Why there is a slip yoke on the driveshaft?

Well, when the rear axle articulates, the distance between the diff and the tranny changes.



Oops, sorry, thinking about my truck

The engine/tranny assembly can move forward/back slightly under tourque, you need a slip assembly between that moving assembly and the static rear diff, or you'll start damaging the pinion bearings in the diff. You only need a little bit of slip, but it's easier to make a longer slip that also seals the rear of the tranny, rather than put a flange on the tranny and have a slip within the driveshaft.



I'll PM my address



EDIT: Oh, and what kind of play do you have at the tranny? Do you mean it can slip in and out (OK) or that there is lateral play in the slip (not OK). If the latter, then you have wear in the tranny rear seal, and that could very well be your clunk.