I have the manual transmission in my car and sometimes when I put in reverse the transmission makes a crunching noise... what gives???

 

Put it into a forward gear first, before putting it into reverse.

 

I know that helps, but I don't believe that you're supposed to do this every time you put it in reverse. Plus it doesn't really get rid of the problem..... There's about a 50/50 chance it does this and I think that qualifyes as a sign that something's not quite right with the trans... also the noise is quite loud so it's sort of embarrasing. Or is this manual trans just plane crappy from the start??

 

Believe it.

Reverse has no synchronizer. No manual transmissions at all have ever had synchronized reverse, until very recently. Drivers are expected to know that they are supposed to put the trans into a synchronized gear before trying to jam it into one that is not synchronized.

 

yup.

even with my "modern" T56, you have to stick it in a gear (i usually choose first) and then swiftly put it in reverse. the only car i didnt have to do that with was my moms toyota. and given how slack the cable shifter was on that, im sure it touched a couple gears on the way to reverse lol.


now if you cant move it fast enough and its not that you're slow... then you might have a couple shot bearings in the trans, causing it to slow down before you can get to reverse.... but thats highly unlikely... any trans that worn should also be making noises at speed.

 

What about transmission oil... we had it up on a lift and there seemed to be leaking a little from the trans...?

 

internal rail manuals have 3 seals and a vent.

one seal is in the front for the input shaft.

one seal is in the rear for the output

one seal is between the shifter and the trans (gasket really)

and the vent is up top.




look around thoes. and you'll find your leak.... unless you cracked the case.

 

Okay, thanx guys!! =) Guess I'll go check it out...

 

A few other possible causes:

bad clutch master or slave cylinder
worn or misadjusted ball stud in bellhousing
bent/worn release fork

Any of the above could prevent the clutch from disengaging completely, making the neutral-to-reverse grind much worse and more noticible than it would be in a properly functioning system, and without necessarily causing problems getting into your forward gears.

-B

 

You know, now that you start talking about clutch I remember that when I shift gears, just when I press the clutch to the bottom, there's a "clicking" noise... This never happens from neutral to 1st, but when for example going from 2nd to 3rd gear... could this be a sign of some clutch thingy? Don't know technical terms so well and I'm not much of a "gear head" so don't know what master or slave cylinder, ball stud, bellhousing or release fork are.

 

The T56 shouldn't do this, as it is one of the few transmissions with a synchronized reverse gear.

 

Then you probably need the synchro on reverse in your trans. fixed.

 

*shrug*

if thats the only thing wrong with it, then im not going to tear into it.. lol.

how the heck do you wear out a reverse syncro anyway? previous owner jamming it into reverse while moving forward?

 

I don't know how you wear out a reverse synchro.

But I know that when I was too lazy to adjust my mechanical linkage once upon a time, I jammed it in reverse a time or two w/ the Hurst and chipped the rev. idler gear pretty happily.