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GST 3rd gear clutch mod

Old 05-01-2008, 09:54 AM
  #26  
burningpoo
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Default RE: GST 3rd gear clutch mod

Glad to hear everything worked out great for you. I would like to see 3rd hit sooner myself, so when I get some extra money to fix any mess ups I do I'm going to give it a shot

I might try from the sides when I do mine, have to make sure I take pictures myself.

Do you know how much wieght you added? The slugs you made, did they just fit, or did you have to work them?

Thanks
Old 05-01-2008, 10:29 AM
  #27  
sparky 25
 
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Default RE: GST 3rd gear clutch mod


Old 05-01-2008, 10:44 AM
  #28  
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Default RE: GST 3rd gear clutch mod

good point, thanks

When ever I get around to it, I think I'm going to try and get the weight of the slug to post here.

If you could, come back after gallon has ran through your mod so we know how it's holding up.

I can't wait to try, but bell buddy first.
Old 05-01-2008, 10:51 AM
  #29  
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Default RE: GST 3rd gear clutch mod

I think once i get some real fuel through it i`ll take it apart

and take a pic to see how its doing but for now its the perfect solution for me[8D]
Old 05-01-2008, 11:44 AM
  #30  
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Default RE: GST 3rd gear clutch mod

I think putting weight on BOTH sides of the Center adjustment screw would perfect your mod, that way the centrifigual force is equal on both sides

I will do this too sometime soon, if the fancy strikes me...lol
Old 05-01-2008, 03:12 PM
  #31  
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Default RE: GST 3rd gear clutch mod


ORIGINAL: The Real Dogman

I think putting weight on BOTH sides of the Center adjustment screw would perfect your mod, that way the centrifigual force is equal on both sides

I will do this too sometime soon, if the fancy strikes me...lol
I`ll do that to even things up and i will put teflon on to strengthen things up

doesn`t really need it, but when ive time on my hands i may aswell
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Old 05-01-2008, 03:36 PM
  #32  
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Default RE: GST 3rd gear clutch mod

were do you get that teflon from?
Old 05-01-2008, 05:43 PM
  #33  
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Default RE: GST 3rd gear clutch mod

I got a small sheet of 1mm teflon of ebay
Old 05-04-2008, 03:49 PM
  #34  
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Default RE: GST 3rd gear clutch mod

ORIGINAL: sparky 25


ORIGINAL: The Real Dogman

I think putting weight on BOTH sides of the Center adjustment screw would perfect your mod, that way the centrifigual force is equal on both sides

I will do this too sometime soon, if the fancy strikes me...lol
I`ll do that to even things up and i will put teflon on to strengthen things up

doesn`t really need it, but when ive time on my hands i may aswell
DISASTER after 3 tanks of fuel the clutch would just start slipping like mad in third

so after a call to the hobby shop for a new set of clutch shoes i set to it again

I bored 2x 5mm holes on the side of each clutch shoe,

i sanded one side of each shoe and stuck a piece of 1mm teflon to them making sure it was the side that faces out of the clutch bell

I then took a hardened steel 4mm hex wrench (for a bit more weight) and cut off 4x 8mm lengths from it

epoxied them in the 4 holes and trimmed off the extra epoxy with a hobby knife

built it all back togeather and set the adjustment on the clutch to 7.5 turns out

when i took the truck for its first run out it shifted excellent

I ran 3 tanks of fuel through it and the truck shifted consistantly and effort less each time,
i can not be happier with how my truck now runs, its great

I will post a video tomorrow

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Old 05-04-2008, 09:54 PM
  #35  
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Default RE: GST 3rd gear clutch mod

The epoxy contaminated the 3rd gear Clutch. Did you clean and sand the inside of the 3rd gear clutchbell before you reassembled it??
Old 05-05-2008, 05:24 AM
  #36  
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Default RE: GST 3rd gear clutch mod

On seeing the new clutch against the old one i noticed that the center of the old clutch had grooves in it

this was due to the adjustment holes on the clutch bell having a burr which ate the center out of the shoes

i took my dremmel with a sanding wheel and removed the burrs

the drilling in from the top wasn`t the greatest idea i know

but i think ive got it just perfect now i can be in third gear in as little as 30ft i could lengthen this with adjustment

and the truck still pulls brilliant with longer run times due to less revs
Old 05-06-2008, 12:37 AM
  #37  
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Default RE: GST 3rd gear clutch mod

sparky when you did your second clutch mod did you drill holes all the way through the clutches?
Old 05-06-2008, 11:34 AM
  #38  
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Default RE: GST 3rd gear clutch mod

Yea i drilled all the way through
Old 05-07-2008, 11:58 AM
  #39  
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Default RE: GST 3rd gear clutch mod

What does everyone think...

Will JB Weld hold up as good as epoxy? It did hold a alternator mount on for 2 weeks untill my friend's brother sold his truck. But that was metal to metal, I'm not sure what these trucks use as a clutch shoe. Maybe I'll try anyway, not sure.
Old 05-07-2008, 12:04 PM
  #40  
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Default RE: GST 3rd gear clutch mod

I think jb weld will work just fine,

also dont be afraid to cut up a 4mm hex wrench as i did for the weights

the stainless bolts i used previous were just a little light for the job

hope you have as much sucess as i`ve had with mine

im sure you`ll be really pleased once you`ve done the mod
Old 05-07-2008, 03:40 PM
  #41  
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Default RE: GST 3rd gear clutch mod

sparky 25, How did you hold the clutch shoe down when you drilled it? I'm about to drill but wanted to know what you used before I start. I was thinking just a plastic clamp that uses a spring being held by my vice.
Old 05-07-2008, 04:43 PM
  #42  
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Default RE: GST 3rd gear clutch mod

i lightly clamped it on a pair of grips being careful not to mark it

i drilled on top of a block of wood and used the grips more for to stop the shoe spinning, hope it goes good for you
Old 05-07-2008, 06:25 PM
  #43  
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Default RE: GST 3rd gear clutch mod

Heres what I've so far...

I used a C clamp that was WAY to big, worked great, didn't move a inch.
I used 5 sizes of drill bits, working my way up to where I could just slide the slug through.

The hole on the left, don't drill there
The hole on the right worked great.

Since my JB Weld is in the tool box in the trunk of my car, in the shop, I'm almost done.

I'm wieghing everthing as I go along to see how much more it's giving me.

BTW With the ware I'm seeing on the shoes, It looks like a new setup, so this should be the stock wieght.

Clutch setup complete(shoes x 2, springs/nut/bolts x 2, set screws w/ single barings x2, metal center piece x 1) = 20.3g

Clutch shoe x 1 = 4.1g-4.2g(they both game me both numbers)

Clutch shoe drilled with 2 holes x1 = 3.6g-3.7g(same thing here)

2 slugs = 1.2g Slug size = 5mm long x is about 4.5mm wide(can't find the right tool for the life of me)

Drilled with 2 slugs no jb weld x 1 = 4.8 (both, even with changing slugs around a few ways)

wieght is around +\- .2g

In case you wanted to know, the round metal ball is small hunting shot for a sling shot. It's wieght is 1g each but would take some grinding to get it small enought to use. I took that picture before I drilled as a idea for plan B

I was 8 and a half turns out when I took my shoes apart.
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Old 05-07-2008, 07:16 PM
  #44  
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Default RE: GST 3rd gear clutch mod

If someone could post a video of this mod working that would be awsome. I have several friends with GST's and none of them seem to be shifting into 3rd or let me say at least you cant hear any change in the motor once it reaches 2nd
Old 05-07-2008, 07:28 PM
  #45  
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Default RE: GST 3rd gear clutch mod

"The hole on the left, don't drill there" lol whats that supposed to mean...
Old 05-07-2008, 07:32 PM
  #46  
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Default RE: GST 3rd gear clutch mod


ORIGINAL: forevernitro75

"The hole on the left, don't drill there" lol whats that supposed to mean...
I broke through a little bit into the hole for the nut.
Old 05-07-2008, 07:48 PM
  #47  
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Default RE: GST 3rd gear clutch mod

One thing ALL you guys need to remember, if you are hearing a shift after the truck has moved as much as 50ft or as little as 25ft then you ARE hitting 3rd!!! This mod only needs to be done if you NEVER hear it shift with a GST 3 speed tranny!! The 1st - 2nd shift is soo soon that you wont usually hear it because it is shifting in the acceleration phase and the actual sound of the shift will sound just the truck accelerating!! Every GST Nemesis or Genesis that has the 3rd gear I have been able to get to shift with the proper tuning!! This mod is not the real fix but it does help!! So mod on if you really have tried to adjust but just can't seem to get it(As a last resort)... But again remember if you hear a shift after the truck is moving then it IS hitting 3rd!!!

Ok done! Mod On Poo!!
Old 05-08-2008, 06:00 AM
  #48  
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Default RE: GST 3rd gear clutch mod

I still can't believe why people don't check the set screws !
This is all a matter of simple adjustment!
If the shoes are not worn or defective in any way, and the black soft springs are used , I am CERTAIN its a matter of adjustment.
From the manual :

Adjust the set screws so the ball just touches the shift hub.Slowly tigthen the set screw while looking at the center where the shoes and hub meet. Once you see the shoe lift slightly, loosen 1/8 turn. Repeat for the other shoe.

You can forget about the 1/8 turn back, just stop when you feel the set screw meets "resistance".
The 3x16 screws you can start by 8 turns out....maybe go back to the 7½ recommended by CEN.

If you dont feel like taking the entire gearbox apart, it is possible to adjust the set screw from the outside (but a little harder to verify the result)....


I had the same problems as everyone else, the factory adjustment is way off ! [:@]
By following the above, it WILL shift.

Old 05-08-2008, 11:17 AM
  #49  
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Default RE: GST 3rd gear clutch mod

I`ve tried it all before and it don`t work without weights in the shoes

unless you have got a all day and a football field to get it to shift

mine is shifting into third gear at about 30 feet and you can clearly hear each shift taking place

i had the black softer springs fitted and it still would not shift

Old 05-08-2008, 11:37 AM
  #50  
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Default RE: GST 3rd gear clutch mod

sparky 25, what did you use to hold the teflon on? Looks like epoxy.

I've hit temps just below 300 in a vary large stone parking lot playing with every thing I could and the truck only hit 3rd once from the look of the shoes. I wouldn't recomend getting hotter than 280, I try and stay around 260-270, but I wanted to see 3rd again. Most of the time I run I don't have room for 3rd, but it would be a lot more fun trying than not knowing.

Like stated above, this is a last resort, try at your own risk.

I'm also going to try auto gasket maker for my exaust, last rebuild left me with a leak from the head and I still have a little leak from taking the baffles out.

Now I'm off, to see what more stupid stuff I can do. HA HA HA

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