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 Old 01-04-2019, 08:07 AM   #1
 
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Default 2nd Gear Grind - is there a fix?!

When I go into 2nd it grinds but only when the car is cold. When the car is warmed up it’s perfect. I’ve read countless threads on this but never found a real “fix”.

I’ve tried changing transmissions fluids, as well as adjusting the shifter cable (I can try again?), I have solid shift bushings in as well.

Is there a fix for this, any input?? Sorry to beat a dead horse but I feel like there has to be a fix besides buying a new transmission...


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 Old 01-04-2019, 10:18 AM   #2
 
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You could rebuild the transmission instead of buying a new one.
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 Old 01-05-2019, 06:35 AM   #3
 
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If this is your only car: buy a trans, have it rebuilt, swap it out when ready. Sell old trans or, depending on your vehicle intentions, save it as a spare.
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 Old 01-05-2019, 08:49 AM   #4
 
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Originally Posted by Fstrnyou View Post
If this is your only car: buy a trans, have it rebuilt, swap it out when ready. Sell old trans or, depending on your vehicle intentions, save it as a spare.
Only one thing will give you a few more miles out of your transmission before you have to replace it. Everybody's correct, once a syncro goes nothing you can do but replace it. But you can drive the car as if you were driving it without a clutch. With perfect shifts at the right RPM range like a rev match. Alot of skilled drivers could do this. If you could do this, you'll be able to do it without grinding. But you're going to eventually have to replace the tranny or the synchros like everybody else is saying there is no quick fix to something that's worn.

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 Old 01-05-2019, 01:10 PM   #5
 
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Originally Posted by Tru3 View Post
When I go into 2nd it grinds but only when the car is cold. When the car is warmed up it’s perfect. I’ve read countless threads on this but never found a real “fix”.

I’ve tried changing transmissions fluids, as well as adjusting the shifter cable (I can try again?), I have solid shift bushings in as well.

Is there a fix for this, any input?? Sorry to beat a dead horse but I feel like there has to be a fix besides buying a new transmission...


2010 MS3 // CS Tip * CS Sri * CS Boost Tubes * CS MZR Bpv * CS Hpfp * Cp-e TMIC * COBB AP (Freektune OTS +)


Good news for you. I live in Canada and have a shit ton of experience driving/racing 2 Speeds through some really brutal winters here.

I really doubt that you need a new tranny. Our transmission, even when new, has a notchy/grindy second gear in cold weather.

If you're not popping out of second gear and it shifts normal when warm, you've got nothing to worry about.

The solution:

1. Use RedLine MTL transmission fluid.

This fluid is 75W80, often the second gen speed3 has 75w90 put in which makes cold crunches worse. This stuff is way better than the OEM or Ford fluid for cold weather. Also lets me shift faster in the warm.

2. Baby second gear for the first few cold shifts, first gear->neutral center->second gear

Instead of shifting directly from first to second, keep your foot on the clutch but pass the shifter into the center neutral area. Then go into second and it won't crunch. It's a trick that a lot of Speed owners use in the cold weather to avoid 2nd gear grinds.

There are some people who say the Ford fluid is better, but I've tried both and the RedLine MTL made a huge difference for my car in the cold. The canadian mazda3 forums also vouch for Redline over Ford fluid for cold weather.

I've also had second gear replaced under warranty a long time ago and it made no difference to second gear cold grinding.

Give it a shot and I bet you'll like the car a lot more in the cold.
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 Old 01-05-2019, 01:31 PM   #6
 
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In addition to moving to neutral also double clutch the shift into second. That is, move the shifter to neutral, let out the clutch, push it back in, then shift into second, let it out. I've had to do that to my Speed 6 the first few shifts since it's been cold, and I used to have to do that in the old Miata too. I think it's just something when these Mazda transmissions, a lot of them have cold 2nd gear issues.
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 Old 01-05-2019, 01:37 PM   #7
 
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Originally Posted by GohanX View Post
In addition to moving to neutral also double clutch the shift into second. That is, move the shifter to neutral, let out the clutch, push it back in, then shift into second, let it out. I've had to do that to my Speed 6 the first few shifts since it's been cold, and I used to have to do that in the old Miata too. I think it's just something when these Mazda transmissions, a lot of them have cold 2nd gear issues.
Agreed, that's the next level move if he's still grinding. That works in almost any car with synchro issues. I luckily don't have to double clutch once I switched to Redline MTL.

I put in Redline MT-90 in the Speed6 and it made a huge difference for cold and warm shifts. My 6 is easier to shift in the cold and the transmission warms up faster than the 3. Cars both have around 130,000 miles.
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2007 Black Speed6 (daily driver)

Freektuned, Accessport, Autotech HPFP, CPE TMIC, Cobb intake + TIP, Ultimate Racing test pipe, CPE xflex RMM, Corksport rear diff mount, Corksport rear brake pads, Matt Damond rear caliper bushings, solid shifter bushings, X-ice3 tires
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 Old 01-05-2019, 02:36 PM   #8
 
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I've always thought double clutching was silly. Okay. I still think it's silly.

You don't need the clutch at all to disengage a gear if the trans isn't loaded.

As you let off the throttle, foot OFF the clutch, pull it out of first gear. This leaves the input side already meshed with the engine which is what your doing when you let out of the clutch the first time during double clutching.
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CS Turbo/DP/RP/HPFP/BPV/R-DiffMount
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Damond RMM/PMM/OCC/PCV Plate
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2004 Olds Alero ECOtec 2.2 - Broken (since Christmas 2015 and I really need to get rid of it)
History:
2008 GSX-R 1000 - Stolen (With several runs past 180, I'd probably be dead by now if it wasn't stolen. So in a way, I'm thankful.)
1988 RX-7 TII - Sold (Megasquirt, streetport, filter-on-turbo SRI, custom TBE, 20psi boost creep on OE turbo, OE TMIC on ice, 13.467 @ 105.44)
1985 Camaro - Sold (est. 265bhp 5.7 swap, Edelbrock intake & Hooker headers)
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 Old 01-05-2019, 08:05 PM   #9
 
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Originally Posted by Mazda3Blog View Post

I put in Redline MT-90 in the Speed6 and it made a huge difference for cold and warm shifts. My 6 is easier to shift in the cold and the transmission warms up faster than the 3. Cars both have around 130,000 miles.
I just put some of the Ford unicorn jizz in mine this afternoon, we'll see how it does when it gets cold again. Also noticed my cv boot was ripped... Dammit.
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 Old 01-08-2019, 07:52 PM   #10
 
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Originally Posted by GohanX View Post
I just put some of the Ford unicorn jizz in mine this afternoon, we'll see how it does when it gets cold again. Also noticed my cv boot was ripped... Dammit.
Give the fluid a week of driving to break in, all the fluids I tried definitely got better after some driving. If you're still not happy with the cold shifts, try the redline MTL because it almost solved the crunches completely for me.

You can get cheap reman axles from RockAuto that work on the speed, I had an axle with a torn boot re-built for about $150 including labour a few years ago.
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Stratified tune, accessport, K&N intake, E-focus RMM, corksport RSB, solid shifter bushings, Corksport steering wheel + ebrake, RE-71R/Pilot Super Sport tires

2007 Black Speed6 (daily driver)

Freektuned, Accessport, Autotech HPFP, CPE TMIC, Cobb intake + TIP, Ultimate Racing test pipe, CPE xflex RMM, Corksport rear diff mount, Corksport rear brake pads, Matt Damond rear caliper bushings, solid shifter bushings, X-ice3 tires
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 Old 01-08-2019, 08:10 PM   #11
 
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It still hasn't got really cold here yet but I haven't had any 2nd gear grinding yet! And yeah I ordered an axle from Rockauto, just got here today.
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 Old 01-11-2019, 09:27 AM   #12
 
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It was 24 degrees this morning, the shifter went right into 2nd, no grind at all. Very nice.
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 Old 01-11-2019, 09:29 AM   #13
 
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I use Royal Purple. Was in the 20's this morning and always shifts fine.
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'06 MS6 GT-165k Miles(Forged@157,116)
Manley Pistons & Rods, King Bearings
Stock Head/Cams, Stock Int/Exh Manifolds
Versatuner, 3-bar MAP, ITV22, CP-e TMIC
CS Turbo/DP/RP/HPFP/BPV/R-DiffMount
White Widow F-DiffMount, Whiteline RSB
Rear Russian Bushings, Poly FSB Bushings
Magnaflow CBE, ACT 6-puck/Streetlite
JBR Tru-3.5/3-port EBCS/EGR-D
Damond RMM/PMM/OCC/PCV Plate
Other rides:
2002 Tacoma ExtCab 2.4L 5spd 2WD - 355k mile Speed support vehicle.
2004 Olds Alero ECOtec 2.2 - Broken (since Christmas 2015 and I really need to get rid of it)
History:
2008 GSX-R 1000 - Stolen (With several runs past 180, I'd probably be dead by now if it wasn't stolen. So in a way, I'm thankful.)
1988 RX-7 TII - Sold (Megasquirt, streetport, filter-on-turbo SRI, custom TBE, 20psi boost creep on OE turbo, OE TMIC on ice, 13.467 @ 105.44)
1985 Camaro - Sold (est. 265bhp 5.7 swap, Edelbrock intake & Hooker headers)
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 Old 01-12-2019, 06:14 PM   #14
 
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I live in Canada too and have used MTL. It worked great making every other gear shift as smooth as butter, winter or summer weather. Never got rid of my second gear grind if I shift relatively fast though. Mine was a different case though in that I tended to grind more when shifting from first to second when it got warmer. Never resolved it, just granny shifted into second or double clutched.
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