5 speed. I think that is what Joe has, but I could have made it plain.
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Originally Posted by 18psi
(Post 1161566)
it's also probably a good idea to replace the bottom shifter bushing with one from 5X or something.
if yours is worn, it could be mis-aligning and causing the notchiness/etc |
My 5 speed was grinding when quickly going into 3rd both upshifting and downshifting. I tried shockproof in it upon recommendation from someone (I would give credit but I don't recall) and it solved the problem immediately.
Cold? What's that? |
Originally Posted by curly
(Post 1161544)
Redline worked ok for most track guys until it gets super hot, then it starts shifting like crap, hence the switch to Amsoil for most track guys.
Stock power levels, though, but I'm not exactly pussyfooting it around. robert |
Originally Posted by Joe Perez
(Post 1161576)
I've never quite understood what people mean when they describe shifting as "notchy." Personally, I find that having a discernible tactile delineation between "in gear" and "not in gear" to be a desirable attribute in a shifter
The notchiness ... the shift isn't quite right. It starts to snick into gear, then it's as if it starts to grind, the synchro finally synchros, and then it goes into gear. So there's just a catch, or notch, a momentary about-to-grind hesitation when going into gear. Often audible as well as being felt through the shifter. It's an interruption to the snick into gear. I use Motorcraft and change it once a season. It has made my 6 speed shift better than when I got it, but it's still not perfect. At this point in the cars' life it sees about equal track to street miles. I have driven the car in below freezing temps and had no shifting issues - it might have been a bit stiffer, but still felt fine. (That's what she said) |
Originally Posted by Mobius
(Post 1161773)
Absolutely agree that you should be able to tell by feel if the shifter is in a gear or not, and that you should feel resistance moving out of and into gear.
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Mitsubishi Diaqueen for the Evo8/9 MR 6 speed trans transformed my '92 5spd from a notchy, stiff disappointment to a smooth-at-any-temp delight. Once I swap in my 6spd I'll be using it again.
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I prefer Motul 75-90 over the FoMoCo stuff. It shifts nicer.
Still waiting to loosen the drain plus and replace the FoMoCo stuff with Amsoil... I still fear stripping the plug, so the FoMoCo stuff stays. But, seriously, the Motul works way better on the other Miata with 50% more miles and a beat up 2nd gear syncro. |
Originally Posted by Joe Perez
(Post 1161793)
... like someone had stuck a dildo into a bucket full of oatmeal, with a few pieces of string connecting it to the syncro forks.
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Originally Posted by Braineack
(Post 1161844)
have you ever seen how a FWD shifter is connected to the trans?
Other FWD cars (Toyotas in particular), use two braided metal cables, one which relays the fore-aft motion of the shifter and another which relays the side-to-side motion. The oatmealness of the Acura's shifter seemed much less to do with any vagueness in the coupling between the shifter and the transmission, and more in that there seemed to be no perceptible gating, and the act of engaging or disengaging a gear was not accompanied by any significant tactile feedback. |
Originally Posted by Braineack
(Post 1161844)
have you ever seen how a FWD shifter is connected to the trans?
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Originally Posted by Leafy
(Post 1161875)
Based on his description I thin he has.
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I've said in several of these threads that the DSM guys use BG Synchroshift, and it really is magical. It will turn a recalcitrant piece of junk into a useful transimission.
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Originally Posted by vehicular
(Post 1161898)
I've said in several of these threads that the DSM guys use BG Synchroshift, and it really is magical. It will turn a recalcitrant piece of junk into a useful transimission.
This DSM info of course has no bearing on whether BG will work well in a Miata trans, but given that both their synchros are unlined bronze the contact will be similar in both, and thus their behavior in a given fluid will as well. |
I've never used Diaqueen, except in EVOs that require it. I HAVE used BG in several DSMs, and like I said, it turned unshiftable junk into good transmissions.
Diaqueen smells like a rotting corpse, so it's probably good stuff. |
Originally Posted by vehicular
(Post 1161898)
I've said in several of these threads that the DSM guys use BG Synchroshift, and it really is magical.
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Well, it does seem only appropriate for this forum that a product called "Diaqueen" would make a good tranny lube.
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I use the Diaqueen in my daily driver, which is a turbocharged 99 galant with an eclipse 5spd trans. I have tried running all sorts of fluid in it, from straight Redline, to Diaqueen, and also the Scot Grey mix which is : 2x Redline MTL SAE 70w-80 API GL-4 Gear Oil
1x BG SyncroShift Part# 790 since my trans takes 3 quarts of fluid. The Diaqueen is by far the best solution so far with the second choice being the Grey mix. Ill be performing a 6spd swap into Lazarus soon and Im wondering if I should just run the Diaqueen in that as well since I already have a copious quantity and dont want to deal with the a holes at the ford dealer. Based on the discussion in this thread it seems like the synchros in the transmissions are similar which means it should work quite nicely. I will report back soon with results. Ive been running Redline in my now dead 5 spd, and when it was cool/warm it was great, but after 10 minutes into a track session the tranny would become a tad notchy which I can assume stemmed from the overheating of the redline fluid. It became worse and worse the more days I did on the same trans fluid. On the other hand the diaqueen in my galant gets changed once a year despite many miles of daily driving and a decent amount of track abuse, and I would say that it shifts better than just about any miata 5/6spd Ive ever driven. |
5 Attachment(s)
Originally Posted by Braineack
(Post 1161844)
have you ever seen how a FWD shifter is connected to the trans?
https://www.miataturbo.net/attachmen...1&d=1409244463 #12 is the shift linkage itself. #13 is the PPF-like device which anchors to the transmission case at #15, and contains the socket into which the shifter ball sits at the rear. Thus, the spatial relationship between the shifter and transmission is rigidly enforced. Here's what it looks like IRL, on the transmission side: https://www.miataturbo.net/attachmen...ine=1409245061 And beneath the shifter: https://www.miataturbo.net/attachmen...ine=1409245061 For comparison, here's a diagram of a cable-type shifter: http://repairguide.autozone.com/znet...5280064bc8.gif And now you know what a FWD shift linkage looks like. :D |
Originally Posted by greddygalant
(Post 1161968)
I use the Diaqueen in my daily driver...and I would say that it shifts better than just about any miata 5/6spd Ive ever driven.
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