I had a very annoying vibration noise after pulling the transmission to install a new clutch. I didn't know anything about aligning the PPF until I started researching what the noise could be. I followed your method and it didn't eliminate the vibration completely but it greatly reduced that noise making it tolerable. Thanks for posting this information!
Thanks a ton man. Dropped my diff and ppf to get it welded, didnt check alignment spec or even rly know of one, just threw everything in back to where it was and gave em the ugga dugga. Hopefully this fixes my noise! Was super confused about what it meant, but this helped a lot.
Did you remove the 3 17mm bolts on the PPF/gearbox and then raised the PPF to spec? Or did you remove the 1 17mm bolt followed by the 2 14mm bolts on the PPF transmission bracket? Most documentation I've seen points to that triangle bracket and not those 3 17mm bolts.
Just bought a miata and getting a grinding around 4.5k rpm and a whirring everywhere else. The previous owner replaced the transmissiom so I'm sure this will solve it. Thank you!
@@guanqiaowang7586 might also be loud tires. I've noticed that after changing my tires to a stickier set, they make a ton more noise and drone as a transmission or diff would, which was my original concern.
@@timothyhodge14 If the transmission is connected only to the ppf don't you have to raise the transmission angle up or down to raise up or lower the ppf ? How do you go about raising up or lowering the transmission to get the ppf at the correct height ?
Once you loosen the PPF bolts, jack the transmission up to increase the distance in your measurement. Mine was at about 2". I jacked the trans up until I had about 2 5/8", then I tightened the bolts to 80 ft-lbs.
@@timothyhodge14 You said the initial measurement was less than 2 1/4 inch from the PPF to the straight edge where as it needed to be 2 1/2 inch+ to meet Mazda specs. How did you go from 2 1/4 inch to 2 1/2 inch? I'm guessing you raised the PPF to increase the distance from the straight edge? Sorry, I could have worded that better lol.
@@timothyhodge14 I’d say below 5k, only have 59k milage on it and I get this on high ways especially when I down shift from 5th to 4th to try to accelerate but my 4th barely have power
@@timothyhodge14 what symptoms did you had? been fighting with a metallic rattle under acceleration at 2500-4000 rpm (and a little bit upon decel) in third and fourth gear, my exhaust heat shields are okay and my gearbox oil is new
The car itself was on jack stands. I was using my second jack to raise the transmission and ppf so that I could set the alignment to spec. It's extremely difficult doing it all by hand, ie trying to measure, hold up the pff, and tighten the bolts all at the same time.
so to raise the ppf, you loosen the bolts, then raise the transmission with a jack or somehow and then you tighten the bolts back while the transmission is at the right height? I get a whining noise while letting off the gas, changed the siff fluid and nothing so ill try this before changing the fluid in the tranny, and I just wanna understand how you adjust the height of the ppf
Yes, loosen the bolts that attach the ppf to the trans and raise the ppf/trans to the proper height and then retighten the jolts and torque to spec. I believe the torque is 72 ft-lbs but double check the forums.
I had a very annoying vibration noise after pulling the transmission to install a new clutch. I didn't know anything about aligning the PPF until I started researching what the noise could be. I followed your method and it didn't eliminate the vibration completely but it greatly reduced that noise making it tolerable. Thanks for posting this information!
My pleasure, try a different set of diff bushings, engine mounts or trans fluid.
Thanks a ton man. Dropped my diff and ppf to get it welded, didnt check alignment spec or even rly know of one, just threw everything in back to where it was and gave em the ugga dugga. Hopefully this fixes my noise! Was super confused about what it meant, but this helped a lot.
Thank you for the appreciation! That's what I am here for.
Is there similar aligment on NC or is it specific to NA/NB?
Ok I have found out there is the same procedure but measurement is in different place and value.
Did you remove the 3 17mm bolts on the PPF/gearbox and then raised the PPF to spec? Or did you remove the 1 17mm bolt followed by the 2 14mm bolts on the PPF transmission bracket? Most documentation I've seen points to that triangle bracket and not those 3 17mm bolts.
I loosed all 3 17mm bolts and the 2 14mm bolts and then set the height and retorqued everything in place.
Just bought a miata and getting a grinding around 4.5k rpm and a whirring everywhere else. The previous owner replaced the transmissiom so I'm sure this will solve it. Thank you!
Check the trans fluid level and ppf alignment
Also, try using Ford Motorcraft trans fluid. See the forums for the exact fluid
Is it a performance clutch or flywheel? they will chatter or sound like grinding sometimes depending on the spec.
@@timothyhodge14 yep I changed to ford trans fluid and the grinding noise reduced significantly. I suspect the diff is also contributing to the noise.
@@guanqiaowang7586 might also be loud tires. I've noticed that after changing my tires to a stickier set, they make a ton more noise and drone as a transmission or diff would, which was my original concern.
This is the only video that makes this very easy to understand
I may have missed it but did he show how to get the ppf into the correct measurement .
Yes, so you need to loosen the front bolts of the ppf and raise the ppf+trans such that it's measures within spec for your Miata.
@@timothyhodge14 If the transmission is connected only to the ppf don't you have to raise the transmission angle up or down to raise up or lower the ppf ? How do you go about raising up or lowering the transmission to get the ppf at the correct height ?
@@Sertao2013 yes, you raise the ppf from the bottom to the appropriate height. Raising the ppf also raises the trans.
so how do you adjust the height?
Once you loosen the PPF bolts, jack the transmission up to increase the distance in your measurement. Mine was at about 2". I jacked the trans up until I had about 2 5/8", then I tightened the bolts to 80 ft-lbs.
So how did you higher the ppf to increase the distance?
Increase distance?
@@timothyhodge14 You said the initial measurement was less than 2 1/4 inch from the PPF to the straight edge where as it needed to be 2 1/2 inch+ to meet Mazda specs. How did you go from 2 1/4 inch to 2 1/2 inch? I'm guessing you raised the PPF to increase the distance from the straight edge? Sorry, I could have worded that better lol.
@@ljt71 oh yes, by loosening the ppf bolts and raising the PPF. By raising the PPF, you pitch up the trans
@@timothyhodge14 Apologies, forgot to reply. Managed to drastically reduce the whine after realigning the ppf :) Thanks!
My 2001 nb makes a metallic rattling in 3rd and 4th gear only, could be that?
If it's upon decel, it's probably the synchros getting old. I'd recommend Ford motorcraft fluid in the trans
@@timothyhodge14 It is when i hit the gas, just like in this video th-cam.com/video/rD8FdGpoK6o/w-d-xo.html
@@timothyhodge14 on my 96 NA I get the grinding rattling sound when on 4th gear only
@@ironcascade7921 at what rpms?
@@timothyhodge14 I’d say below 5k, only have 59k milage on it and I get this on high ways especially when I down shift from 5th to 4th to try to accelerate but my 4th barely have power
I've been trying to figure a grinding scraping whirling noise on acceleration only gets louder when I press gas hard most prominent in 5th
Check your trans fluid, might be low or old.
Excuse my ignorance .. what is a P. P. F. ??
Power plant frame
Pretty much same as RX8 but a little different.
Was this the cause after you aligned it?
It's a warped flywheel. Have a new clutch ready for it, just trying to burn it out
@@timothyhodge14 what symptoms did you had? been fighting with a metallic rattle under acceleration at 2500-4000 rpm (and a little bit upon decel) in third and fourth gear, my exhaust heat shields are okay and my gearbox oil is new
Doesn't the car being jacked up from the transmission, influence the height of the PPF!?..
The car itself was on jack stands. I was using my second jack to raise the transmission and ppf so that I could set the alignment to spec. It's extremely difficult doing it all by hand, ie trying to measure, hold up the pff, and tighten the bolts all at the same time.
so to raise the ppf, you loosen the bolts, then raise the transmission with a jack or somehow and then you tighten the bolts back while the transmission is at the right height? I get a whining noise while letting off the gas, changed the siff fluid and nothing so ill try this before changing the fluid in the tranny, and I just wanna understand how you adjust the height of the ppf
Yes, loosen the bolts that attach the ppf to the trans and raise the ppf/trans to the proper height and then retighten the jolts and torque to spec. I believe the torque is 72 ft-lbs but double check the forums.
@@timothyhodge14 will do, thanks!
Thank you legend
Very helpful man thanks
I'd just get a magnetic straight edge from harbor freight for like 30 bucks
Broom stick is free lol