transmission problems

[91redshodriver]

well i pick up this 91 sho and the guy said i had some work to do to it and that is why i sold it so cheap and i was driving it i noticed it grinds in 1st and rev. but all the others are just fine.

any ideas on what is wrong.

 

[SuperHO]

Yeah...are you dropping down to 2nd before going into 1st, and then 3rd to reverse? Mine grinds if I don't do that....****, all 4 transmissions I've had do that....

 

[91redshodriver]

well i have not tried thatt yet but it is when i frsit start out in frist i grind and you have to shove it in frist and reverse
:wave:

 

[TYSHO]

Check your fluid level. Can also be a clutch going to crap. Keep grinding them and you will pay a pretty penny for new blocking ring if you can find one and a brand new synchronizer, all which have been discontinued many, many years back.

 

[93rev2sev]

Clutch going to crap as tysho so eloquently stated.

 

[SuperHO]

not neccessarily....like I said, mine have ALWAYS done that. I've gotta put it in 2nd before going into first, or it'll grind. and it's not just on this transmission...it's been like that for all 4 transmissions that I've had in my cars. I think it's a Ford thing, m'self, cuz my old ranger was that way, too.

 

[TYSHO]

not neccessarily....like I said, mine have ALWAYS done that. I've gotta put it in 2nd before going into first, or it'll grind. and it's not just on this transmission...it's been like that for all 4 transmissions that I've had in my cars. I think it's a Ford thing, m'self, cuz my old ranger was that way, too.

That's because 1st gear is more prone to having the blocking ring wear out, especially if in stop and go traffic everyday. The older they get doesn't help either. When you reach the point of 1st gear grinding all of the time, it's only prevented by engaging 2nd gear then selecting 1st gear right after that. This is able to happen because 2nd gear stops the internal gears from spinning, the job your 1st gear blocking ring is suppose to do when engaging 1st gear without using another gear first, and allows the synchronizer to mesh with the non-spinning gear selected.

Now, if your reverse is doing it too, it is good to know if you're engaging another gear before selecting reverse. This is needed information because reverse is not a synchronized gear and will grind if you try to engage the gear within 5 seconds after having pressed the clutch pedal down and not selecting a foward gear before hand.

 

[93rev2sev]

Driving for extended periods with a weak clutch that dosent fully disengage will wear that 1st gear blocking ring out faster, I would imagine.
Edit, just a thought:
Downshifting from 4th or 5th to first is quite ******* that blocking ring too...so I've heard. This is where double clutching and rev matching are so important. Traveling 45MPH and you want to stop for a light, most people I know put the clutch in, then brake, take the car out of gear, slow to 25 or so and start hunting for first. Meanwhile, the 1st gear blocking ring is getting heated up while you push the gear selector towards first. If you had taken your foot off of the clutch while you slowed, and raised your engine speed you would have done the blocking rings job with the clutch. The transmission Input shaft speed would have been more closely matched to the output shaft speed, making it much easier to get into first and not putting nearly as much stress on the transmission internals. When you put the clutch in at 45, and take it out of gear, the input shaft is spinning at engine speed ~ 1600. The tires turning keep the trans output shaft spinning as you slow. Meanwhile the trans input shaft is spinning very slowly because you let the clutch out at 1600 RPM and then took it out of gear...it might actually have stopped by now. When you start pushing it into 1st gear, the blocking ring has to take the input shaft from almost 0 to about 3000RPM or more.

 

[91redshodriver]

ok i will try all of them ideas i have time this weekend and if none work i will replacing the whole tranny. does any one know where i can get a trany in minnesota for cheap and relible

 

[1993MTXSHO]

not neccessarily....like I said, mine have ALWAYS done that. I've gotta put it in 2nd before going into first, or it'll grind. and it's not just on this transmission...it's been like that for all 4 transmissions that I've had in my cars. I think it's a Ford thing, m'self, cuz my old ranger was that way, too.

my trans did that as well would grind into first unless i put it in while the car was slightly rolling, or I really had to slam it into first at a stop. Course that trans lasted abotu 4k miesl before blowing the diff pin.