what do you mean, grinding in the transmission? grinding when shifting or when driving?

 

come to think of it, its easy to bump when you're in there bolting in transmission

 

There's a constant very minor hum/grind when the clutch is not engaged, and it's just sitting in neutral or in gear. It seems to get louder as the RPMs get higher.

 

What's easy to bump? The wiper pump?

 

does the noise go away when you depress the clutch pedal?

 

Yeah, the noise goes away when my foot presses down fully on the clutch.

 

So here's the video of driving in my friend's cobra 'stang. It was kinda scary, since he's not the best at driving yet, so it's the last time driving with him, but none-the-less, it is a Cobra.

http://www.youtube.com/watch?v=MgaiFwawwtI

 

the issue is not with your transmission but with a faulty throwout bearing. the trans must be dropped to replace the throwout bearing, which rides o n the input shaft's collar. i can post pics if you woudl like.

 

how is it that an inexperienced driver has a car like that to drive? that's not something to buy ur kid for his first car i don't care how much money u make. i say he totals it within the first yr.

 

Hahahahahaha! That's what me and all my non-wanting-to-showoff-constantly (like the kid with Cobra) say.

 

I just replaced the throwout/release bearing though. Brand spanking new.

 

They also got it for a good deal because it was a V6, then a guy did some body modifications, and then he dropped a Cobra motor in it, so they were able to get it for about $6000. So it has its fair share of problems. My buddies dad drove it one day, and when the kid finally left, he said that thing was a ticking time-bomb. He said there were all sorts of weird sounds going on. I guess the guy that did the engine swap didn't do the best job at it.

 

Just finshed mine. And I'm also thinking throw out bearing too. Mabel u didn't get it on there right. Or better yet ur fork came off the spring. take ur clutch slave off and see if the fork is on there correctly. Hard to type on a phone. Ill explain it better later

 

Yeah, I know what you mean. I believe it's on the spring correctly, at least it feels like it is. And It seems that randomly when the grinding sound is happening, that occasionally it sounds like something is being thrown around. It's hard to explain, but it's like the grinding sound is happening, then randomly a louder, clunk-clunk-clunk happens, then it's back to the regular humming/grinding sound.

 

^^now that sounds like the internal bearings are shot..evidence of being run without the proper amount or type of lubricant in the trans.

 

uh-oh. I guess it looks like I will have to go pick up a transmission from a local guy who sells butt-loads of RX7 stuff. I'll give him a call. Would all 81-85 12a transmissions work? or just the 81-83? I found the ad on craigslist for this guy.
http://lancaster.craigslist.org/cto/1720639849.html
Sounds like he might be my new friend.

 

And how long do you think the transmission I have right now will last?

 

Longer than that Mustang.

 

Hahahaha, then I take that as it's good for another week. I will see if I can stop by that one guys place this weekend.

 

its fine until the radio isn't loud enough to cover the noise, then you need to fix it

 

I got no radio, haha. It isn't that loud at all, just a small hum. I'll see if I can grab a transmission this weekend, and here are some pictures of where the car was sitting before I got her. Kinda sad.

 

Nice find. I'm not much for wide bodies but that one looks great.

I'd drive it for awhile before worrying too much about that drive train sound, might go away or at least not get any worse.

If it ain't broke, don't fix it.

 

Mmk, well I'm still going to go check out this guy's stuff this weekend. I might also get check out a 1st gen that's been sitting in a garage for about 10 years. Me and two other friends are thinking possibly an auto-x vehicle?

 

Busy day today, got a used transmission from a guy about 45 minutes away that's loaded with RX7 parts. He said that he when he got in the business of selling RX parts, he didn't know that 98% of customers would be Puerto Ricans. HAHA. He was a nice guy, I got the transmission for $150 and he knows it runs good for a fact. I also got a 13B rotor housing and rotor for 10 bucks!!! My friend got the other 1/2 of the engine for 10 bucks then too! We are currently cleaning them up and prepping them for display. Pictures sometime tomorrow maybe after I might go check out a '79 that's been sitting in a garage for 10 years and only has 30 some thousand miles one it. Oh, and I also got the RX inspected, so it's road legal.

 

i have that same nose u where talking about now after 3 weeks of my install. i'm just going to let it go till it drives me crazy. the exedy oem replacement clutch i used, [sucks] i hate it, it lets off at the top and doesn't grab nearly as good as the wore out oem. o well..off the go free up ports 5 and 6. well see how long this takes