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I used the TB, I thought it was a good starting place. Transgo Tugger and superior shift as well. ASTG manual is good, I followed along that and the FSM with the TB videos. One thing the transmission bench kit didn’t come with is the Viton seal. I bought a Transtec kit as well, and used the Viton seal.
HitmanX above suggested a set of ‘Bench Buddy’ brushes to me, well worth it.
I've had my pan off 3-4 times, drilling out the holes for the 'shift kit', to make it shift correctly. If you drill them too big the first time, it is what it is, and probably shifts to hard. I've removed everything the previous owner had done, was not to my standards.
Without a doubt, what is firm for someone is soft for someone else. There are a few valves have have a bigger influence than a spring or hole. With the wrong valve, there is no way to make it softer. There are ways to reduce the size of a hole, but you are better off starting small.
Without a doubt, the engineers spent a lot of time to make it shift how it does. If you like it, then it's best to leave things alone. If you want it firmer, then it could take you months to find out the right combination that you are good with. For many, it's not worth it, which is totally understandable.
With a programmer, you could change the software to adjust some firmness. I know my Tweecer is capable of doing that. No, I have not played with that portion of the software.......yet.
I would be very careful 'polishing' any bore in a valve body. The clearances are critical and enlarging the bore is just asking for a lot of trouble. Sure, the valve will move easier, but the oil pressure will leak past the bore/piston because of the increased clearances.
Kinda like boring a block and having beautiful cylinder bores but using stock pistons. Not wise what so ever. In the right hands, it's probably good, but most of us have very little experience what happens when you do something like that.
You're not enlarging anything.. you're cleaning the bore out. They are nylon brushes, this is what they are meant for. You'd be there 100 years 'boring' with those things. I used them by hand, they did a nice job.
I use those Bench Buddy's on all my VBs. Euro and domestic. Work badass, especially on neglected transmissions.
Just did the Towpower on my 70W in the Screw last fall. Shifts far better and used the billet OD servo to boot. AOD changed drastically too with the Transgo HP and the Superior billet OD servo.
I try to buy the more indepth kits over the smaller ones. Usually fix far more inherent issues with units with them.
To polish anything you are taking away. Taking away means that the bore will be larger. In the wrong hands this could be bad. But if you think they are just nylon brushes, I suggest you look at their site and see what they say about them.
You are correct, when polishing you are taking away, such as a layer of oxidation, or layer of dirt, or built up and baked on oils. Differences in polishing is all. Big difference from taking away material.
I understand they have abrasives, to clean the bores. And they worked well. Especially, as above, if they are all gummed up. Not sure how else you would clean them to be honest.
Getting in there with tooling and scotchbrite or something, I’d be a lot more concerned with scratching the bores.
Transmission shops all around use them. Machine shops clean various types bores with abrasives daily.
Edit. See below. Cleaning an aluminum bore, is not comparable to polishing soft paint. Paint you are intentionally removing material, cleaning a bore is completely different.
I remember using a buffer to polish my first car. I found out what happens when a little bit more is too much. Just sharing that it does something and just because a little bit is good does not mean a little bit more is better.
There are a lot of fixes for valve body bores that are too large. VW has a problem with soft valve bodies and boring the hole bigger with a bigger piston is the fix.
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