4 Spd slight grinding when shifting.

---Now for the tips;I think the N-1 shift is probably the hardest one for the brass ring to achieve.Firstly, with the vehicle at rest the Mainshaft and synchronizers are doing zero rpm.The engine is idling at around 800rpm. With a 2.66 ratio low gear, the low gear is spinning at about 300 rpm(800/2.66). The input shaft, the clutch disc,the cluster gear and 2nd and 3rd gears are all spinning too. So you depress the clutch and pull back on the stick which pushes the brass synchro ring towards the 1st gear cone.Well first it has to push whatever oil might be there,out of the way.Then it begins braking all those spinning parts to zero rpm.If you have EP oil in there, it will help slow things down, but at the same time its hard to get out from between the brass and the cone.The ATF is easy to displace but doesnt slow the cluster down as fast.Then when everything finally comes to a halt, the slider begins to move and wants to engage the clutch-teeth on the low gear. But very often the teeth but-up to eachother and the shift cant be completed, except by force or to pedal it and try again. This is all aggravated if the disc is trying to remain at engine speed due to A) insufficient plate departure, or B) faulty pressure-plate(usually unequal finger height), or C) faulty disc(usually coming apart) or D) a bent hub, or E) the disc is not sliding on the input gear splines properly.On the other hand, if all the clutch parts are in good shape, and youre running a thick EP oil, its possible for all those spinning parts to stop almost too fast and again the slider teeth may but-up with the low gear clutch-teeth and again the shift is hard to complete. So you can see just how hard the brass is working.
---By contrast look at the 3-4 shift. Lets say you shift at 5500rpm and 3rd gear is 1.40 ratio.The split here is about 1400rpm.That sounds like it would be harder right? comparing 1400 to 300.Well consider that the engine rpm is rapidly falling because you took your foot off the gas, right? And the Mainshaft is now spinning too. And the engine is dragging the disc down and all the other spinning parts too. Then consider that shifting at 5500 doesnt occur all that often.Most of the time youll be shifting at half that so the split will be half or 700rpm.If you want to see this in action, just pull a 3-4 shift at 30mph without using the clutch.You will likely have to modulate the gas pedal because the rpm actually falls too fast, and the slider will grind as the shift window goes by.
-The thing is when I take these trannys apart,all the 3-4 synchro parts are usually in fine shape.The 4th gear brass is very good.The 1st brass is most worn and the 2nd steel teeth are the most beat up.
-Its possible to make the A-833 shift almost like a Honda, but it takes a lot of work and a lot of time/experimentation.
-Long story short is this;Theres a lot more to installing a clutch than just slamming it in.And we havent even addressed dial-indicating the bellhouse.