hi,

my car is a 88 gtu, manual trans
it has no problem going over 20 in 1st gear. but if I want to shift from 2nd gear to 1st on a speed over 20, it won't goes in. feel like there is something blocking it.
also, if I drive it in any gear with half clutch for too long(over 5 sec), the clutch will stuck in the middle. the clutch won't come back. you have to press it to the floor and then it will come back.

any idea?

 

Mine does it too... And I am pretty sure it is supposed to be like that. I'm assuming it is a sort of safety mechanism for your gearbox.

As for the second issue... Why the hell are you riding the clutch pedal anyway??

 

The cyncros are probably not spinning up fast enough or might just be the way they are so you can't go to first when moving to fast .or (getting old and worn out )to allow it to go in gear at higher 1st. gear speeds , does it go into gear from a stand still right away or is there a few second waiting period with a bit of a noise in the tranny area .
As far as the clutch goes sounds like you probably are bypassing in need of either master cyl work . might be air in the system but I'm guessing you need master work .
You really shouldn't ride the clutch all you are doing is slipping it , next thing will be a clutch replace .There has been a hell of a lot of arguments and nonsense on the subject but if the clutch components are giving you trouble and you can afford 100 or 150 bucks save yourself the grief and replace all master and slave plus the line and your problems should be gone . If the master has been repaired lately then that is all the more reason to replace with new . You can by kits to rebuild the old but then you have components that are almost old enough to have grandchildren and may have already been repaired once or twice . Go here for all the FSM's Foxed.ca - Mazda RX-7 Manuals

 

This is standard in every manual car I've ever driven.

 

I am sure it is designed to be that way. Every manual transmission car I have driven will fight you if you try to put it in 1st gear at rolling speed. Reason bein is you probably don't want to over rev the engine and lock your wheels if you shift from 5th to 1st by mistake.

 

Sounds like the synchronizers are starting to wear out. As for the clutch problem, I have no idea...haha

 

so, we are not supposed to redline in 1st gear? 20 will not even reach 5000rpm i guess.

for the second, sometimes in the traffic jam, you really don't know if you should release the clutch or press it fully... you just hesitate for too long.

 

RXmiles answered your first question ====== I am sure it is designed to be that way. Every manual transmission car I have driven will fight you if you try to put it in 1st gear at rolling speed. Reason bein is you probably don't want to over rev the engine and lock your wheels if you shift from 5th to 1st by mistake.

As far as redlining in first it won't stop you from doing that it just won't let you down shift so it doesn't create to much pressure on the tranny and do damage to the drive train .. pretty much all cars are like that .

As far as your clutch goes that question has been answered for you also . It could be either one the master or the slave cyl for the clutch . Probably the Master cyl is by passing and and causing this problem ( a common problem with this type of hyd clutch) . The problem isn't going to go away it will only get worse until it becomes dangerous . FIX IT before you run into someone .

 

My integra had the same thing. Its just a safety thing so you do screw **** up.

 

Downshifting into 1st is not the same as taking off in 1st and bringing it to redline.

You should never really ride the clutch that long, but it also shouldn't get stuck. Hydraulics would be the most likely cause, as mentioned. This could also make it harder to get into gear, and could be part of your issue with 1st gear. Although, downshifting into 1st has never been smooth on any manual transmission I've had including a rebuilt one.

 

Downshifting to that high of an rpm is pointless anyways.

Why would you want to downshift practically into the redline?

You're not going to accelerate any faster with the time taken to shift back into second gear.

If you want to go fast in first gear wind first gear out before shifting into second.

If your clutch isnt coming back up you need to bleed your clutch master/slave cylinder, if that doesn't work replace it and bleed it and your problem will be fixed.

Rotary >Pistons

 

iirc reverse doesn't have a synchro and 1st might not either. If it does it was different.