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Check out these cool new parts.
Adjustable servo pins for 700R4 & 200-4R
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Sorry, won't let me attach pictures.
www.ls1tech.com
www.ls1tech.com
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A link to whatever you're trying to show would help - that's just the forum frontpage.
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Not sure what you are trying to post. In the past I have seen some small like bullet looking thing from superior to add to the length of the pin. I have actually seen them split and cause a failure. Personally I use longer pins from GM that do the job just fine. Also you can tighten the band up by placing spacers from trans go in between the cover for the 2nd and 4th gear servo's. Another trick I have used if you are using a factory 4th servo is to flip the piston and this will make the pin longer and tighten up the band. Vince
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For whatever reasons this site will not allow me to attach anything.
Go to www.turbobuick.com and look for adjustable servo pins.
The pins have a separate threaded tip and jam nut to lengthen or shorten pin length. It requires no grinding or welding.
An allen wrench goes through the center of the pin to adjust the length. This allows fine tunning the length.
I remember when Transgo used to recommend flipping the 4th piston.
Go to www.turbobuick.com and look for adjustable servo pins.
The pins have a separate threaded tip and jam nut to lengthen or shorten pin length. It requires no grinding or welding.
An allen wrench goes through the center of the pin to adjust the length. This allows fine tunning the length.
I remember when Transgo used to recommend flipping the 4th piston.
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That sounds like a neat idea. Would definitely save fucking around pulling and grinding to get the length right!
I believe the Transgo HD2-C kit for the 4L60E tells you to flip the 4th servo piston over, if memory serves me rightly. I like the Fairbanks billet 2nd/4th servos. I used a Sonnax 4th billet servo once, and had no 4th gear, so that was the end of that shit.
I believe the Transgo HD2-C kit for the 4L60E tells you to flip the 4th servo piston over, if memory serves me rightly. I like the Fairbanks billet 2nd/4th servos. I used a Sonnax 4th billet servo once, and had no 4th gear, so that was the end of that shit.
I have been comtemplating making them similar to the design used on the km series mitsubishi servo.I have the machines to do it but dont have the time.Until them,I will just install longer pins on the 2004r and washers between the cushion spring cover and pin on the 700r4 till I get around to it.
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http://www.2004rperformancecenter.com/
http://www.2004rperformancecenter.com/mcartfree/product.asp?intProdID=24
Is this the one ?
This guy is very cool to deal with.
I forgot about Bruce (PTS) having the adjustable pins.
I see an adjsutable pin as something to potentially get loose and cause a band failure.
It would be quicker to assemble, but after you assemble a 700 or 200, it's not like there is enough band material to ever need adjustment again.
I see an adjsutable pin as something to potentially get loose and cause a band failure.
It would be quicker to assemble, but after you assemble a 700 or 200, it's not like there is enough band material to ever need adjustment again.
Nope,
Not a moron, I've done this a time or two myself :-D
On the 200's and 700's I use washers usually, but TH400's, 4L80Es, and others, weld and grind.
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There many transmissions which use a screw and jam nut to adjust the bands. Torque the screws to a set torque, back off x number of turns and lock down the jam nut. Simple and straight forward adjustment.
Jakeshoe, some engines have adjustable pushrods and have no issues with them backing off. The servo pin does not see as much stress and movement as a pushrod.
Jakeshoe, some engines have adjustable pushrods and have no issues with them backing off. The servo pin does not see as much stress and movement as a pushrod.
Yeah,
I've known of some engines with adjustable pushrods, but would you run adjustable pushrods in a 7K rpm BBC?
I agree with you that the servo doesn't see the stresses of a pushrod.
The adjustable servo pins look nice and are innovative but do you really think they will be a hot seller?
I'm all for new stuff that works and I can appreciate the effort that goes into it since I'm working on some stuff for the 4L80E and TH400 myself. However I don't see myself as a builder buying any of these.
I guess it would be handy to buy one of each, use it to set band clearance, measure it, then make a regular servo pin match the length. Much like you do building engines and using an adjustable pushrod to figure the length to order.
The other possible issue, I've ran into sometimes, you REALLY should have a cover with a hole in it ( and I think your pins come with one from the pics I saw elsewhere) so you can see the servo travel, but the cover has to match the servo you use.
For instance,
If building a 200-4R, and if you used a xxx brand servo on every build, it would be worthwhile to buy one to butcher and use as an assembly tool. However I use a different servo depending on level of build, so I'm not buying $500 worth of servos to butcher.
I've known of some engines with adjustable pushrods, but would you run adjustable pushrods in a 7K rpm BBC?
I agree with you that the servo doesn't see the stresses of a pushrod.
The adjustable servo pins look nice and are innovative but do you really think they will be a hot seller?
I'm all for new stuff that works and I can appreciate the effort that goes into it since I'm working on some stuff for the 4L80E and TH400 myself. However I don't see myself as a builder buying any of these.
I guess it would be handy to buy one of each, use it to set band clearance, measure it, then make a regular servo pin match the length. Much like you do building engines and using an adjustable pushrod to figure the length to order.
The other possible issue, I've ran into sometimes, you REALLY should have a cover with a hole in it ( and I think your pins come with one from the pics I saw elsewhere) so you can see the servo travel, but the cover has to match the servo you use.
For instance,
If building a 200-4R, and if you used a xxx brand servo on every build, it would be worthwhile to buy one to butcher and use as an assembly tool. However I use a different servo depending on level of build, so I'm not buying $500 worth of servos to butcher.
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I'm not in the same league as you guys, but I have also welded and ground pins
Jake it is a good idea to use it as a tool like you said to find the correct length pin.I never thought of it that way.I use a drilled cover to get the information needed to select proper pin length.I think I mentioned this to you a few years ago.Care must be taken when using the shim to go under the big cushion spring in the 2004r because the more shims you have the less the cushion spring compresses befor the band is applied and this can cause upshift and downshift clunks and concerns.
We spoke about the cover being drilled years ago Chris when I had an issue with a 200-4R that checking servo clearance the "normal" way I had .060" and I had no 2nd gear
I shimmed it up and all of the sudden it was ripping the tires going into 2nd. I use your servos typically, but I'm not drilling a hole in one to use for checking, I use another method now to set band clearance
I shimmed it up and all of the sudden it was ripping the tires going into 2nd. I use your servos typically, but I'm not drilling a hole in one to use for checking, I use another method now to set band clearance
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