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Is the transmission straight??

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Old Dec 31, 2022 | 04:10 PM
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Is the transmission straight??

Can anyone confirm that my transmission is in fact straight? When looking from below(see picture) the end of the transmission seems to be more over to one side. Can anyone take pictures of their's to compare to?
I'm wondering if I need to loosen up the motor mount nuts on the sub frame and center it.

Also I don't recall if the Driveshaft is supposed to be further in. What you see there is already mounted to the differential.






Last edited by coolrotariesR1; Dec 31, 2022 at 04:35 PM.
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Old Jan 1, 2023 | 07:10 AM
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Go in the cabin and look down thru the transmission tunnel shifter hole. It’s much easier to see if it’s in the correct position. The cast shifter mount should be centered up. I’ve had to loosen up the engine mounts and ppf at the transmissions to get it in the correct alignment.


~ GW
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Old Jan 1, 2023 | 10:04 AM
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From: https://www2.mazda.com/en/100th/
generally Mazda puts the engine in the car pointing a little to the left, it give more room for the RHD steering column and turbos.
but the shifter should be centered in the hole and the boot should go on and line up
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Old Jan 1, 2023 | 06:28 PM
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Thanks guys. Yes when viewing from above in the interior the transmission looks shifted to one side. Going to loosen the motor mounts and straighten it out a bit.
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Old Jan 2, 2023 | 09:07 AM
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Also the trans will be all goofy until you bolt on the PPF. I would not expect good alignment until you install it.

Right now you are dealing with the whole drivetrain sitting on 2 points (The motor mounts) - it's basically a 2-legged stool. Once the PPF is on you have 2 more points (The diff mounts) and now the stool has 4 legs

Dale
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Old Jan 2, 2023 | 10:16 AM
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I agree Dale but from the looks of it the centering is really off. Plan is to mount the ppf loosely and better align everything then tighten.
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Old Jan 2, 2023 | 10:23 AM
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^

Make sure you torque down the ppf at the diff first. There’s not any adjustment there due to the side locating bolt. After that, you can loosen up the ppf at the trans and both engine mounts. I use a pry bar ( sometimes a wood board fits perfect) to hold it in place while torquing down at the front attachment of the trans. If you don’t hold it in place, it will have a tendency to move around.

~ GW
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Old Jan 2, 2023 | 10:34 AM
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Originally Posted by gdub29e
^

Make sure you torque down the ppf at the diff first. There’s not any adjustment there due to the side locating bolt. After that, you can loosen up the ppf at the trans and both engine mounts. I use a pry bar ( sometimes a wood board fits perfect) to hold it in place while torquing down at the front attachment of the trans. If you don’t hold it in place, it will have a tendency to move around.

~ GW
Good suggestion. Thanks
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Old Jan 3, 2023 | 08:18 AM
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A bit late to the thread but last I checked that rear transmission seal is less than $25 bucks and takes maybe a minute to R & R. Moving the snout of the drive shaft in and out of that seal can be hard on it, especially if the snout was left dry. Would suck to have to do this all over again if it leaked. Just sayin’



Last edited by Sgtblue; Jan 3, 2023 at 08:22 AM.
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Old Jan 3, 2023 | 08:33 AM
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Originally Posted by Sgtblue
A bit late to the thread but last I checked that rear transmission seal is less than $25 bucks and takes maybe a minute to R & R. Moving the snout of the drive shaft in and out of that seal can be hard on it, especially if the snout was left dry. Would suck to have to do this all over again if it leaked. Just sayin’


Thanks! I already changed it. Good to go
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Old Jan 4, 2023 | 08:52 AM
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I seem to remember my trans/engine all floppy side to side and up and down without the PPF. The motor mounts may be preloaded one direction or something that is causing it to be over to the side but again don't sweat it until the PPF is in.

Remember the whole thing right now is sitting on just 2 points. If there's something else connected to it that could be pulling it one way or the other that could be a factor.

May be worth loosening the motor mount to subframe nuts to let them twist and settle a bit when you install the PPF.

Dale
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Old Jan 4, 2023 | 08:55 AM
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From: https://www2.mazda.com/en/100th/
Originally Posted by DaleClark
Remember the whole thing right now is sitting on just 2 points.

Dale
like you say, 2 leg stool... if you look at every power train in any car, they are 3 points, because that is the one that works best. occasionally there is a 4th, but its usually a bonus one
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Old Jan 4, 2023 | 09:04 AM
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Originally Posted by j9fd3s
like you say, 2 leg stool... if you look at every power train in any car, they are 3 points, because that is the one that works best. occasionally there is a 4th, but its usually a bonus one
By bonus you mean this >> Transmission Crossmember because every fd should have one .

~ Gw
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Old Jan 4, 2023 | 03:01 PM
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Banzai Transmission Brace will fix the issue here and make drivetrain alignment a breeze.

You're gonna want to lift that motor again just to get the pressure & binding off the motor mounts after your transmission tail is aligned.

Do not reuse motor mount & PPF lock nuts, always replace.
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Old Jan 4, 2023 | 03:02 PM
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Originally Posted by Nakd n Fearless
Banzai Transmission Brace will fix the issue here and make drivetrain alignment a breeze.

You're gonna want to lift that motor again just to get the pressure & binding off the motor mounts after your transmission tail is aligned.

Do not reuse motor mount & PPF lock nuts, always replace.
I'm curious... Why do the ppf and motor mount nuts have to be replaced if they are in good condition?
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Old Jan 4, 2023 | 04:56 PM
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Originally Posted by coolrotariesR1
I'm curious... Why do the ppf and motor mount nuts have to be replaced if they are in good condition?
I've never replaced them. Never found a need to.

Dale
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Old Jan 4, 2023 | 07:53 PM
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Because distorted thread nuts are single use and Mazda clearly states NEW NUT in the FSM.

They are very expensive with a Mazda part number tagged on it, but you can find the same grade nut for less elsewhere.

There is likely no issue with re-using lock nuts and installing them good & tight without measuring on an average street car.

Last edited by Nakd n Fearless; Jan 4, 2023 at 07:56 PM. Reason: grammar
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Old Jan 5, 2023 | 08:31 AM
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IMHO you can re-use the nuts. For a little insurance put some blue Loctite on them.

The reasoning that they are locking nuts and the locking feature is less effective after install/removal is sound. But they do hold up.

If one somehow manages to come loose it's got a VERY long stud to work its way down and you will hear substantial noise from the drivetrain slopping around. Considering I have NEVER EVER heard a case of this happening there ya go.

Up to you but here are the facts, make your decision

Dale
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Old Jan 5, 2023 | 08:51 AM
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Originally Posted by Nakd n Fearless;[url=tel:12545435
12545435[/url]]Because distorted thread nuts are single use and Mazda clearly states NEW NUT in the FSM…
There is likely no issue with re-using lock nuts and installing them good & tight without measuring on an average street car.
Yeah, I’ve never replaced mine either. Good point that they’re distorted thread, but I’ve always drilled them on with a good impact. Never had one come loose and have always needed an impact to get them off again.
Figured it was a case of responsible corporate engineering and a convenient revenue stream
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Old Jan 5, 2023 | 10:10 AM
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Can someone confirm if the Driveshaft is OK like this? I don't see how I can insert in further into the back of the transmission any further. I don't recall how much it was in.
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Old Jan 5, 2023 | 11:01 AM
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The pinion angle will be off until you cinch up the PPF. It’s drooping. Once the PPF is reinstalled it raises the pinion which will raise the aft end of the driveshaft…and you shouldn’t see as much shiny bits anymore.

Last edited by Sgtblue; Jan 5, 2023 at 11:07 AM.
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Old Jan 5, 2023 | 11:18 AM
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Your right. Just tightened up everything a d it's good to go. Thanks
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