downshifting is bad for tranny?
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This is a discussion on downshifting is bad for tranny? within the Transmission & AWD forums, part of the Tech & Modifying & General Repairs category; so i was watching a few video's on double clutching and all... and from what they said "its bad to ...

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    Registered User ezzzey's Avatar
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    downshifting is bad for tranny?

    so i was watching a few video's on double clutching and all... and from what they said "its bad to downshift, unless you're double clutching and rev matching". Because if you dont rev match, you're letting the tranny slow down the car and you're making it work and putting a lot of stress on it, and they said "its better to replace the brakes, then tranny"> since obviously its a lot cheaper to replace brake pads.

    just some info i wanted to share, and see if anyone that has a lot more experience with subaru's then me might have something to say positive or negative twoards this news.

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    Registered User ezzzey's Avatar
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    Quote Originally Posted by TheJ View Post


    Sophie the tranny says "it's all about moderation".


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    Registered User bboylocob's Avatar
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    Quote Originally Posted by TheJ View Post


    Sophie the tranny says "it's all about moderation".
    LOL

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    Registered User kiger0183's Avatar
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    Quote Originally Posted by TheJ View Post


    Sophie the tranny says "it's all about moderation".
    Wow!
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    Registered User Slider's Avatar
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    Before i down shift i usually rev it up and let the clutch out slow.
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    Registered User bboylocob's Avatar
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    yea same here.i rev up ans slowly release the clutch to match.if downshifting for a pull...i do the same thing just alot faster!!!

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    Registered User Mike502's Avatar
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    I am going to leave your tranny alone, however. I would say that it would create more stress on the clutch than the actual transmission components. If it really did that much damage to the transmission then truck drivers have been screwing themselves for years. I've never heard of a trucker that only used his brakes. I haven't heard of man truckers that used the clutch after they got out of 1st or 2nd. (not to mension anyone who races...Im pretty sure it's relatively safe when done properly
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    Registered User subaru_crazy's Avatar
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    If you downshift and don't revmatch then you are wearing out your synchros, yes the truck drivers down shift but most big rigs have what is called the "engine break" so its not like downshifting its another piece of hardware in the engine. So downshifting is fine when you revmatch otherwise you will have problems with shifting into gears and will start to grind when doing so.
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    Registered User ezzzey's Avatar
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    Quote Originally Posted by subaru_crazy View Post
    If you downshift and don't revmatch then you are wearing out your synchros, yes the truck drivers down shift but most big rigs have what is called the "engine break" so its not like downshifting its another piece of hardware in the engine. So downshifting is fine when you revmatch otherwise you will have problems with shifting into gears and will start to grind when doing so.
    someone told me to get my synchros checked, anyone know how much that may cost? I wanna have an idea what the price might be like.

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    Registered User nSj77h's Avatar
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    Quote Originally Posted by TheJ View Post


    Sophie the tranny says "it's all about moderation".


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    Registered User Slider's Avatar
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    I honestly dont see how you can really screw the tranny when you down shift and rev match. because once the clutch is out all the work is on the motor to slow down.
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    Quote Originally Posted by ezzzey View Post
    someone told me to get my synchros checked, anyone know how much that may cost? I wanna have an idea what the price might be like.
    checking you synchros requirs a complete tranny break down.. looking at alot of money at least the 700 mark prob more like 900 depending on where you bring it..and yes down shifting is bad if its not done properly..your synchros and gears get clashed together causing not normal stress on the internals..one of the reasons you see alot of wrx tranny's gone bad...what makes you think you need to check your synchros?
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    Registered User bboylocob's Avatar
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    brakes are for slowing down not trannies.i think i would rather pay for new brakes then pay for a new trannie.

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