I'm Back! '90 GTUs

[infernosg]

Originally Posted by project86

So you just sourced Miata trans and had someone do the input shaft mod for you? Does the fc shifter still fit the same way since it's just the internal parts being changed?

The mod is essentially putting the Miata gears into the RX7 transmission housings so the rear housing and shift linkages are still all RX7. Though technically you could swap some Miata stuff over so you could run a Miata short shifter if you wanted. They're much cheaper for some reason. It sounds straightforward but it's a pretty complicated task. You have to completely disassemble the transmission to get to remove the input shaft. I posted a how-to on here a while back detailing the process per the FSM.

[knonfs]

Originally Posted by project86

So you just sourced Miata trans and had someone do the input shaft mod for you? Does the fc shifter still fit the same way since it's just the internal parts being changed?

Originally Posted by infernosg

The mod is essentially putting the Miata gears into the RX7 transmission housings so the rear housing and shift linkages are still all RX7. Though technically you could swap some Miata stuff over so you could run a Miata short shifter if you wanted. They're much cheaper for some reason. It sounds straightforward but it's a pretty complicated task. You have to completely disassemble the transmission to get to remove the input shaft. I posted a how-to on here a while back detailing the process per the FSM.

A good local standup guy (in Northern VA that is) is selling a NA FC trans with the Miata gears on it. I don't want to cross post threads, but if you are interested, I can get you in touch with him (or pm you his FS thread)

[chibikougan]

I have those injectors and new connectors if you want them. You cover shipping and they are yours.

[project86]

Originally Posted by djmtsu

Describe the 'shudder'.

Like the engine is missing? Clutch chattering? Suspension shunt?

its more of a heavier vibration coming from under my butt. I looked on Mazdatrix and actually found a trouble shooting guide for that sort of thing. I've basically narrowed it down to bad u-joints, trans mounts, or bad ring and pinion (crap i hope not because those are pricey). So i started cheap and ordered the trans mounts. Ill just work my way up from there until I've replaced it all.

Originally Posted by knonfs

A good local standup guy (in Northern VA that is) is selling a NA FC trans with the Miata gears on it. I don't want to cross post threads, but if you are interested, I can get you in touch with him (or pm you his FS thread)

Feel free to post the link here or PM me. I may not be in a position to buy it now but I'd love to know the price. Or see if i can work out a deal with him.

Originally Posted by chibikougan

I have those injectors and new connectors if you want them. You cover shipping and they are yours.

Heck yeah Ransom. Text me 406-450-4103.

[chibikougan]

Texted ya. I will get them ready to send out Monday. I will just ship them and we can figure it out. If I get an address

[project86]

Originally Posted by chibikougan

Texted ya. I will get them ready to send out Monday. I will just ship them and we can figure it out. If I get an address

Ransom you da man!

[FC Zach]

Originally Posted by project86

its more of a heavier vibration coming from under my butt. I've basically narrowed it down to bad u-joints, trans mounts

Have you inspected your trans mounts? Most likely they're bad considering the age and exposure to oils which turns them into a mushy mess. I've seen this on a few 2nd gens. I've had some completely separate.

Originally Posted by project86

So i started cheap and ordered the trans mounts. Ill just work my way up from there until I've replaced it all.

Good choice, if you don't have the aluminum shield for the mount closest to the exhaust I'd recommend getting it.