I never drove this car before but i wouldnt think its normal for my car to be hard to downshift into 1st and 2nd. It seems like it doesnt want to go in gear that easy like i can feel somethignstopping it it right before/as its about to go into gear. downshifting into 3rd is fine tho and 4th seems fine too

Upshiftings in first and 2nd gear is fine its just the downshifting, is this normal or no ? I also replaced all of my shifter bushings so the shifter is more stiff, it just seems abnormally hard to downshift into 1st and 2nd

hopefully everything is ok, i have a spare transmission just incase but i really think it could just be the way im shifting too maybe i have no idea

 

hmm I have the same problem. Probably worn gear syncros. And some good tranny oil would help. If u dont have that already.

 

2nd shouldn't really be difficult, but you have to be going pretty slow to shift smoothly into 1st.

 

i have some redline mt90 that i am going to put in there , should this help or is there somethingbetter i should be using ?

i heard there is some neo tranny oil that supposedly helps this problem alot, would i be better off getting that ? i would just stick the mt90 in for now

i also have an open diff (non lsd), but i have redline superlightweight gear oil for that too , not that its going to help this problem

edit - also for the record , not that anyone would be stupid enough not to do this ... but my foot is holding the clutch pedal all the way down and it still does it, im going to change the fluid soon

 

what speed are you going when you try to downshift into 2nd? 1st?

 

NEO is what maxdatrix promotes so it must work well. Either would be fine.

 

speedometer isnt working now ( ithink i didnt connect it right at least i hope), anyways im downshifting when im at like 3000 or less im not going fast at all, id say 25-30 mph when i downshift into 2nd, cuz i know the rpms arent jacking up when i downshift cuz im already slowed down from hitting the brakes(its a rebuilt motor so im driving it pretty darn slow) ... this is when im coming to a stop at a light or stop sign etc and im trying to shift slow and smooth but it just doesnt want to like it almost goes into gear then its like i have to give it a little more push like it doesnt want to do it smoothly

 

Did you replace the clutch when you did the rebuild? If so, did you make all the adjustments necessary for that?

 

i dont know much about adjusting the clutch, but its brand new clutch and flywheel throwout bearing pilot bearing etc, the clutch was instaled onto the motor when it was rebuilt, it was rebuilt by rotaryresurrection, he has alot of respect on here and definitely knows what hes doing

as far as adjustments , the only adjustment is the pedal height and bleeding the slave for the clutch correct ? i dont know what else

 

on alot of cars 1st gear has no synchro. you're not really supposed to ever downshift into first. if you do, you need to double clutch it.

 

its really the 2nd gear im concerned about , i never really downshift into 1st anyways, thats what the brakes are for

 

WTF you need to downshift into 1st for?
If you want to downshift properly, learn how to rev match.


-Ted

 

^^ it is not rev match...
he needs to double clutch to spin the input shaft up to speed.
rev match would do nothing but make the shift smoother... IF he could get it into the gear without double clutching.

 

i also have this problem...i found that, as i heel toe into second, rev a we bit higher then as is DROPS you can ease it in without any clunking....i cant stress enough that you have to wait like a fraction of a second before you slip it into gear, otherwise youll probably grind it in...this is my problem anyways your welcome to try it for your self.

 

I've done several tests to my car and it seems that I may only downshift to second gear AT or BELOW 20 mph and first gear at EXACTLY 0 mph otherwise it will grind.(Bad Synchros)

It seems to be a normal problem to our old cars. Many people have suggested using a product called Redline MT90 for manual transmission fluid to fix this problem.

 

On almost any stick car, its difficult to downshift into first gear unless you are going really slow. It was designed like that on purpose.



It is revmatch... Obviously you have never driven or shifted gears w/o using the clutch.

 

the synchos are worn out and could not keep up...

you could double clutch into it...

if you are going 40....

put it in neutral, let clutch out, rev to around 5500 ish, step clutch in and put it into 2nd

should slide right in

 

no - you are wrong. And there is no need for your trying to act "smart" and be offensive reply.

rev matching - the clutch is down the whole time, including when you blip the throttle. it is like a regular shift except you rev it to match the rpm to the next gear. however, the input shaft is not being spun up by the engine in the process, just the synchos

double clutching, however. you engage the clutch when it is in neutral, so you can bring the rpm up and bring the input shaft up - so the synchos barely have to work when you shift gears.

both have NOTHING to do with shifting without using the clutch

that has NOTHING to do with a design on purpose. it is like that because the synchos cannot keep up. if you could double clutch, you would find it easy to slide it into gear.

please dont make up BS and make yourself look like a mean meanie.

 

im afraid im not to firmiliar with double clutching into LOWER gears...i mean seems possible, makes sence, just seems hard to take time and engage clutch into neutral, disengauge clutch and attempt to find the right rev to engauge again.

hmmm did that make sence? i think so

 

Practice makes perfect

 

Listen up guy, the input shaft is spinning if the clutch is engaged. And btw there is no need to press the clutch pedal while you are doing that.. while you are moving all you have to do is raise or lower the rpm to get into your desired gear, depending on what you are trying to do(upshift/downshift). And nobody is making up bs, its a cold hard fact. Im not trying to impress anyone, Im just spreading "correct" information..

 

How on Earth can you spin the syncros without spinning the input shaft? You can rev match just the engine to make releasing the clutch smoother on a downshift, but that would do nothing for the gearbox.

You can rev match and shift without the clutch if the gearbox is willing. My Dodge Dart's 4 speed was good for this (good blocking ring type synchros), but the T-10 in my '62 Lark didn't dig it. So I disagree that rev matching has nothing to do with clutchless shifting.

What I believe Martin was refering to was old transmissions, 3 speeds in particular, that did not have a synchonized 1st gear.

When you shift normally the input shaft wants to slow down due to drag. When you upshift the synchro slows down the input shaft and clutch disc to allow the clutch sleeve in the tranny to engage the next gear. In a downshift the synchro has to fight the drag and accelerate the input shaft and clutch disc which is much more difficult. A synchro is really a small cone clutch. GL-5 gear oils are meant for hypoid gears that have sliding tooth contact. GL-5 lubricates the synchros a little too well. Redline MTL or MT-90 is not as slippery as a GL-5 gear oil so the sychros are better able to do their job.

Any more questions?

 

Like he just said practice makes perfect. I know from experience. At first I thought double clutching would really slow me down but he hardly does now that I've practiced it so much. I must say I am now somewhat happy that my car is a lil ghetto cause I've learned an important technique. The only time it really slows me down is double clutching while upshifting. I shift up from first to second but if I try it fast it grinds like crazy. So, I have to take off push the clutch in then wait for the rpms to drop from.....oh let's say from 7k-5.5k then put it in gear into second and take off again that's all. In short no drag racing for me, but that's way too boring anyways. It's all about slideways

 

ok....
i really dont know what is wrong with you guys...
but i have to be nice...

so - stick with your myths... whatevers - i dont care.

maybe someone intelligent will chrim in....

 

I dunno what you're smoking, but double clutching *IS* a fancy way of rev matching.

What is YOUR definition of rev matching???

Rev matching is basically matching the engine RPM to driveshaft speed.

It has NOTHING to with the synchros *IF* done properly.

It has nothing to do with the clutch pedal *IF* done properly.

I can get the car to downshift into 1st IF I rev match from 2nd gear, but it'll take a few practice tries to get the feel right.
I only used to do this for drifting (more like power oversteer) into a really slow turn - we're talking under 30mph, cause 1st gear redlines at 30mph.


-Ted