Thread: Home made shift kit

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I just saw this, anyone ever try it, it seems too easy??

http://www.speedwaybids.com/tech/TH3...Shift_Kit.html

Sean

I can see it working on the stage 1 part, you will be moving fluid through passages at a greater rate, Im not sure what #2 does, But I think I would just spend the money for a proven kit. Trannys are pretty expensive to replace.

Im not sure i would have the guts to try it! I`m pretty scared of messing with auto trannies.

Ive done a few of those home made shift kits, but never plugged that hole. Maybe it stops fluid from entering or exiting the accumulator? All that accumulator is is a shock absorber. Ive added shims between the cap and spring, so it builds more pressure and therefore hits harder and later. But its easier to just remove that spring all together. Theres also an accumulator spring in the valve body that you can toss.

Are they saying that you drill a 3/16" hole or a 1" hole? OR is the word or a typo and should be OF instead??

quote: Take the seperator plate and drill the holes noted in the picture to 3/16 or an inch and reinstall. That is stage 1 of your HomeMade Shiftkit.

Looks like a simple B&M shift kit to me. I paid $23 for one in 1977 for my TH350. Worked great.

Kitz

It's a typo.

I went and bought one today $65, it's not worth the money to have to tear it apart again if I screw it up. Be neat to hear how it works though.

Sean

Not worth trying. The dowel blocks the fluid to the accumulator. Removing the spring improves shifts but not always as hard an impact shift as people think they want to have. The seperator plate needs more work to be done to be as effective as he's promoting it can be. No mention of check ball removal or re-installation. No mention of any inspection of existing holes and there condition or or sizing. So there's a possibility that the average tinkerer will either not be happy with the performance or damage to the unit. The TH-350 series has a few simple things to modify it to improve it's shifting performance with out doing harm to it.

Do you want to elaborate on that. I already bought the B&M Transpack kit, is there something more to do??

Sean

First we need to know how fresh your tranny is. Would you have any idea of where the thrusts are set and the clutch clearances are set at? Was there a case saver installed? etc. The transpack is a good way to go. Give it a try and see if your tune is where you want it when you're finished.