recently about a week ago my 87 na started to make a strange high pitched squeeking noise only when i am engine braking,

in gear, foot off the clutch and gas. ( deaccelerating only...i can be on brakes or not on brakes it still does it....
its also doing it in reverse i notice. it sounds like the faster you are going the "faster" the squeeking noises are.

i dont think its brakes or anything.... cuase i push clutch in or pop it outa gear or start to cruize or acel the noise stops instantly.

my dad ran along next to me going slow making the noise happen and it sounds like its coming from somewhere under the car....
got no clue what it is!

 

I would start looking around your clutch.. Sounds like a bearing going..

 

perhaps the throwout bearing

 

Actually it sounds like the bearings on the inut shaft of the transmission might be going bad. when you accelerate the tourqe load on the bearings would be counterclockwise, when you decel or go in reverse the tourqe would be clockwise, hence the sound in only when decel or reverse.

just a thought.

kenn

 

i have to go ahead and bring this back from the dead.

i am having the EXACT same problem and want to know what the outcome was.

this FC is purely a project car for auto-x, i converted it to manual and when i did so i used the trans, driveshaft, and rear end from a car with ~180K on it (bought the car for $50, i know i'm a cheap ***). until now i have had no problems/excessive noise.

i have had the car up and checked play in the driveline, mounts, and wheel bearings. i even checked for scuff marks from my wheels from possibly rubbing on something. nothing.

 

bump

 

ive had the exact same problem !! This was happening for a couple weeks, when finally something gave way, and now i have excessive noise coming from what sounds like my tranny's area. Although after this noise started happening i swapped my tranny with another one thats good, and i still have the problem.

 

Dont Drive the car anymore !!! Check something first. I think we figured out what was wrong with my car, but if you let it go to long you may suffer the same fate as me. Check your lower pulley for play. It should have some but not much. You take off the clutch fan and check the bolt. Mine was way to loose, so the sound we believe was the clutch moving and touching the engine. That bolt is supposed to be 300 foot pounds of pressure, mine was loose. As a result of it being like this for a couple weeks, i believe i threw the front bearing in my car, so essentially the engine has to come out. Check and see if this is the problem. Could save you a big pain in the ***.. Let me know your results

 

so you're saying the front pulley bolt was loose and allowing e-shaft play/thorsen bearings to slip out? i'll check it before i take it for inspection tomorry...

 

yah that seemed to be the case with mine. Hopefully with me it didnt damage anything else. Its worth a try to check out. I actually ended up before finding this out, replacing my whole tranny, new TO bearing... new clutch.. etc.. and it didnt fix anything. I believe i might have to replace the thrust bearing on mine. Hopefully it is nothing more serious, like the main bearing.

 

well i put the car in gear this morning and torqued down the main pulley bolt... it was fine and didn't budge. i know there isn't any e-shaft play either, as i adusted it with the proper spacer.

this problem is definitely drivetrain related. i'm going to check it again this weekend.

my first guess is the drive/propeller shaft bearing in the tail piece of the transmission... i checked front bearing play a couple thousand miles ago before i put in the manual by wiggling the input shaft and it was alright (noticeable, but very small slop). i'm also going to re-torque my mounting adapters from the trans swap, though the noise is definitely of a rotational/oscillating nature that is coming from the mid-to-rear drivetrain.

*additionally, that front pulley bolt isn't supposed to be that tight... i think you are talking about the fylwheel nut. front pulley bolt torque spec is high, but only like 80-90 ft/lbs.

 

maybe its something different. Nonethless mine was way to loose. We are still working on repairing the problem, so ill take into account that it didnt work right for you. Its strange because i did and automatic to manual swap myself. I wonder if it is somehow related. My buddy is really good with rx7's (we built the engine ourselves and everything else in the car) but i took it to a guy in town who is a guru for rx7's. He was saying it sounds messed pretty good, and he has never seen anything like it. But he said he will find out the problem so hopefully he is successful and i can post the results. best of luck with your repairs.

 

wierd...

thanks for all the input.

have you guys checked out the universal joints? a guy with a wide range of experience at the shop i work at said it sounded alot like a bad u-joint. i may just pick up a cheap used drive shaft and see if it fixes it.

it would make sense because the sound really only happens when torque is applied to the drive train in the opposite direction it normally goes when accelerating.

 

maybe thats very possible, let me know your results asap...

 

drive shaft all the way. 30 dollars and an afternoon later and no squeak!

 

sweet ill have to give that a try,,

 

perhaps you care to tell us if you know what a throw out bearing is?
so tell me
do you knwo what a throw out bearing is? do you know what it does?

 

I believe I too am having a similar problem and it started just a couple of weeks ago. I have an 87 GXL (I still haven't figured out all the abbreviations). I thought it might be something in the throttle cable sticking. It only does it when I take my foot off the gas but doesn't seem to do it while I'm using the cruise control. So where do I start looking to fix the problem. I know just enough to be dangerous!

 

it's when you're engine braking?

ummm... driveshaft?