I have an 04 with 124,000 miles on it...when i shift into fourth gear at high revs it makes a crunching noise and i can feel in the gear shifter a crunch....like im forcing it into gear even when the clutch is in...it is only fourth gear that does it. I am not an idiot when it comes to cars but i am kinda an idiot when it comes to my rx8 because I just got it...any insight would help out tremendously!!!

 

Time for a new tranny. Did you test drive the car before you bought it? Try changing the transmission fluid, maybe it is very old or low. But at 124,000 I bet your synchros are done.

 

mine does that for second gear, and for me its the synchro... if it can go in to gear at low speeds and revs then its your synchro

 

it was just fine when i bought it...it developed over time....and its fine at low revs...the synchro is inside the tranny i take it? how hard is it to replace?

 

If you have to ask...it isn't something you can DIY....

It could just be the syncro...or.......If you can find a good used tranny for $500ish it will likely be the most cost effective solution...

 

sigh my money was supposed to be going towards new rims and tires...but i guess a good transmission is a better investment...

 

Contact www.mazmart.com, www.partsgroup.com, or www.revvinsevens.com

 

Ok thank you very much!!

 

do the simple things first such as changing fluid. report back.

 

and if you end up needing a new transmission, The Parts Group is located just 40 minutes south of Huntsville...

 

I contacted them and they don't have any transmissions anymore:/ sigh. I will change fluid soon. I work all day and go to school at night. I'll get to it when I can...

 

If it's just a syncro...it won't hurt anything much to leave it.....be gentle trying to engage 4th and try and rev match and it will go in easier

 

ok so now 5th gear is starting in like the 4th gear but sometimes b4 it is warmed up and especially now that it is getting colder i can get into 4th at high revs without grinding atleast once...still havent managed to change the fluid...been too busy but I have it! lol...feedback?

 

Try changing the tranny fluid. Redline MT-90 (only). I thought I had a problem with 4th gear, but it went away after changing from a new batch of something else, to the Redline.

 

well i bought royal purple...would that still be ok?

 

gonna change the fluid today...I have Royal Purple synthetic fluid, will that still be ok or is it better to go with Redline?

 

Anyone? No? Yes?

 

dont use what the transmission is not asking for.
is it a GL-4 fluid?

 

Yep! It says gl-4 on it...does that mean it is good?

 

I tried a random good-brand GL-4. It did not work. I tried, based on CW around here, Red Line Mt-90. It worked. I "searched" to find others have had good results with RL which is why I tried it. Try whatever you want.

 

Royal Purple is notorious for giving people shifting problems. Do a search. I'd stick with Redline MT90. My 2nd gear was doing what you described. Went away after a few hundred miles with fresh Redline.

 

MT90 is best for our trannies. There have been a bunch of problem with Royal Purple synthetic transmission fluid specifically.

 

Ok thank you very much! I guess I will be taking back the Royal Purple then and get Redline. Is there anywhere such as an auto parts store that would carry it, or would I have to find it online? I want to change the fluid ASAP and I have found it online, I just dont want to have to wait for it to come in...