3 speed auto Trans mods all in one place

[turbovanman²]

Looks good, this has needed to be done for YEARS. I dont know how many times Ive wanted to put a shift kit in my NY, read on it and got so confused with new/old conflicting information I just left it alone.

I didn't notice one thing I would love to see added, I know if you block off the shuttle valves you cant use the normal ports to check line pressure. Id love to see something added on how to check the line pressure after blocking off the shuttle valve and the correct way to check it.

Thanks guys!

That isn't true, blocking the accumulator does that but you simply use another port to check, not a big deal.

[ShadowFromHell]

Could you add something on what port to use then? Another thing I think would be cool to have on there is where/how or at least a picture of how you guys drill the side of the case to adjust the line pressure without dropping the pan. It may be stupid simple, but a pic would be great.

[turbovanman²]

Could you add something on what port to use then? Another thing I think would be cool to have on there is where/how or at least a picture of how you guys drill the side of the case to adjust the line pressure without dropping the pan. It may be stupid simple, but a pic would be great.

I can do that.

[Bardo]

Has/can someone post up a parts list and a location of parts? Mainly the clutches and steels.

[turbovanman²]

Has/can someone post up a parts list and a location of parts? Mainly the clutches and steels.

Too many suppliers, but there are a few people post up, if I remember later, I'll find them or I am sure others remember and can post up.

[crusty shadow]

i picked up an N/A trans today, going back this weekend to grab a neon trans for the internals.
waiting to see more info on this thread so i can order clutches bands, steels etc, i have no idea where to order them from.

[ShadowFromHell]

Even if it was just a part number list, not necessarily a link to a supplier would be great. Give us the part numbers and we could track them down ourselves. I am really excited about this, as Ive wanted to learn more about modding auto's for a long time but the info was really spread out and some of it was contradictory. That, and if things go as plan I will be needed a nice built auto by the middle of next race season .

[Bardo]

I love this idea as I need 2 trans built.

[135sohc]

Even if it was just a part number list, not necessarily a link to a supplier would be great. Give us the part numbers and we could track them down ourselves. I am really excited about this, as Ive wanted to learn more about modding auto's for a long time but the info was really spread out and some of it was contradictory. That, and if things go as plan I will be needed a nice built auto by the middle of next race season .

We can put together a listing of certain hard parts that can only be had from the dealership but for alot of the individual pieces like clutches/steels/seals ect everyone puts their own part number on them that it wouldnt really be effective as its so subject to change.

http://www.bulkpart.com/ http://www.makcotransmissionparts.com/ <<<these are both the same company.
http://www.transmissionpartsusa.com/


Those 3 links will cover most of the general piecemeal items if your not looking to buy a complete kit or want to mix and match.

http://www.sonnax.com/ they make alot of the specialty 'repair' items, mostly VB related.


http://www.transtar1.com/ They supply mostly pre-made kits.

http://www.altousa.com/ Not a direct retailer, they do have a catalog with part numbers if your looking for specific things.

[jefo]

I tried something new that seemed to work very well. On the stock throttle body (46mm on 89 voyager turbo) there is a rod next to the groove where the trans cable hooks up. I cut this off and drilled it out to the right size so the trans cable could be mounted there. Then I adjusted the cable so that at wot it would still pull the cable all of the way.

Due to the new leverage ratio, it makes the part throttle shifts higher without changing the wot shifts. The trans a lot more reactive to throttle inputs, kind of like sport mode in newer cars.

[zin]

I tried something new that seemed to work very well. On the stock throttle body (46mm on 89 voyager turbo) there is a rod next to the groove where the trans cable hooks up. I cut this off and drilled it out to the right size so the trans cable could be mounted there. Then I adjusted the cable so that at wot it would still pull the cable all of the way.

Due to the new leverage ratio, it makes the part throttle shifts higher without changing the wot shifts. The trans a lot more reactive to throttle inputs, kind of like sport mode in newer cars.

Can't quite visualize this... Post a picture?..

Mike

[jefo]

The rod I cut off and drilled a hole in its place is the shaft that sticks out to the left, further than anything else in this pic:

http://img9.imageshack.us/img9/115/img1653y.jpg

[zin]

Sorry to be so picky, but can you shoot it from the side? I'm liking that it looks factory in that picture...

From what you were saying, it sounds like it improves driveability/performance but otherwise acts "normal".

Mike

[jefo]

Here is a photo of the cable pivot repositioned:

http://www.pinkbike.com/photo/9024205/

[zin]

Thanks! That should help quite a bit.

Mike

[shackwrrr]

Ok finally got around to installing my modded valve body and I have a slight problem. If I manually shift from a stop I get Low/reverse band overlap when shifting to second. It does a quick bind then its fine, no problem in manual 2nd or D.

I did the following to my valve body (neon unit)

Rod in shuttle valve
Ball in bypass valve
Drilled 2 holes to 1/8
left ball out
Drilled .046 bleed hole
Pressure reg turned 5 turns from all the way loose
Adjusted band (snug>1.5)
Blocked accumulator

I peeked in an checked out the rear clutch and it did not have a wave snap ring and was very tight.
second gear band was very loose when I first pulled pan.

[RoadWarrior222]

IIRC it does the apply sequence a tad different, when it's manually shifted from 1, but don't have the ATSG or FSM mans on hand to check right now.

[zin]

Manually shifting applies the low /reverse band for extra holding power in first (IIRC) .

Might affect the timing of the elements as they are applied and released. Could make some overlap ...

Mike

[turbovanman²]

Manually shifting applies the low /reverse band for extra holding power in first (IIRC) .

Might affect the timing of the elements as they are applied and released. Could make some overlap ...

Mike

Yep, could be the rear band is too tight or too loose. Clutch free play won't matter as your going from 1-2, the rear clutch is applied on both gears.

[crusty shadow]

i found a link to a .pdf of the ATSG for the a413 that you can download for free http://213.174.154.66/document.php?f...A415+A470+.pdf the site also has .pdf files for the A670, a-727, a-904, 40, 41,42 series transmissions as well as other manufacturers if you search around the site. http://docs.rapidlibrary.com/index.php?q=ATSG