Alto G4 Friction Material

PureHybrid

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Talked with a buddy that builds glides, he said the G4 is a little softer and should produce less chatter than the G3. Never noticed this on an Allison but it's a completely different control system too, and I've also never used the G3 in a powerglide
 

Bdsankey

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NC-smokinlmm

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I’ll have to ask my builder about these. Too bad I just refreshed my 6l80 last year, the G3’s are holding up great. I would worry about the softer material on the G4, wonder why they did that?
 

JoshH

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Whys that? I was about to call dave for a set

Do they measure different than what's listed? I'm just as confused as James
The late model 6 speeds have a different thickness pressure plate in the C4, and they way the power packs are packaged, they won't allow you to get the desired clearance on the C4 clutch with the steels supplied. I dislike packaged kits in general because it seems the clearance on C3 and C4 never seem to line up exactly how I like, and I tend to have to mix and match different thickness steels to get it where I want. That's part of the reason I prefer to just buy individual friction and steel plates rather than complete modules so I can choose exactly what I need to get the clearance I want.
 

Bdsankey

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I’ll have to ask my builder about these. Too bad I just refreshed my 6l80 last year, the G3’s are holding up great. I would worry about the softer material on the G4, wonder why they did that?
Softer isn't always a bad thing. They do tend to harden with some heat.

I'll keep everyone posted and do some rudimentary hardness testing with my hands.
 

PureHybrid

Isuzu Shakes IT
Feb 15, 2012
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Central OH
The late model 6 speeds have a different thickness pressure plate in the C4, and they way the power packs are packaged, they won't allow you to get the desired clearance on the C4 clutch with the steels supplied. I dislike packaged kits in general because it seems the clearance on C3 and C4 never seem to line up exactly how I like, and I tend to have to mix and match different thickness steels to get it where I want. That's part of the reason I prefer to just buy individual friction and steel plates rather than complete modules so I can choose exactly what I need to get the clearance I want.
Just cut the c4 plate ya tight wad ?

.475 thick, .086 steel x4 and .098 x2

Cutting the c3 plate to about .385 and you can run the same stackup, I've had a local machine guy trim them to .355 and you can run more .098 steels to handle heat. Or just to run OE steels
 
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JoshH

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Just cut the c4 plate ya tight wad ?

.475 thick, .086 steel x4 and .098 x2

Cutting the c3 plate to about .385 and you can run the same stackup, I've had a local machine guy trim them to .355 and you can run more .098 steels to handle heat. Or just to run OE steels
Late model 6 speeds already have a thinner C4 plate. It's not a huge problem for me because I try to keep plenty of different thickness steels on hand, but if I'm buying a "one size fits all kit", I don't want to have to buy a bunch of extra stuff to make it work. For the at home, DIY guy, it'll be a problem because they won't have enough .098 steels to get the clearance where it needs to be.
 

PureHybrid

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Late model 6 speeds already have a thinner C4 plate. It's not a huge problem for me because I try to keep plenty of different thickness steels on hand, but if I'm buying a "one size fits all kit", I don't want to have to buy a bunch of extra stuff to make it work. For the at home, DIY guy, it'll be a problem because they won't have enough .098 steels to get the clearance where it needs to be.
Are you referring to L5P stuff? LML plates are thicker in the ones I've had apart
 

Gman003

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Late model 6 speeds already have a thinner C4 plate. It's not a huge problem for me because I try to keep plenty of different thickness steels on hand, but if I'm buying a "one size fits all kit", I don't want to have to buy a bunch of extra stuff to make it work. For the at home, DIY guy, it'll be a problem because they won't have enough .098 steels to get the clearance where it needs to be.
The new g4 pack comes with the thinner apply plate, I honestly regret buying it but was kinda too late to back out before getting the price because they set me up with the main distributor before telling me they were $1300 I decided to go with c1-c4 and save $220 as every video I seen showed the c5 basically doesn’t even get the ink rubbed off but still like $500 more than the g3 or gpzs I pieced together and I’m not looking to push huge power I just figured buy once cry once knowing I’ll never have to replace these clutches again but still way too much money for the normal population but I’m sure there’s enough guys with the money to buy these up I just don’t know why they are charging almost double for them it’s not worth the price even if they where made of gold
 

Bdsankey

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The new g4 pack comes with the thinner apply plate, I honestly regret buying it but was kinda too late to back out before getting the price because they set me up with the main distributor before telling me they were $1300 I decided to go with c1-c4 and save $220 as every video I seen showed the c5 basically doesn’t even get the ink rubbed off but still like $500 more than the g3 or gpzs I pieced together and I’m not looking to push huge power I just figured buy once cry once knowing I’ll never have to replace these clutches again but still way too much money for the normal population but I’m sure there’s enough guys with the money to buy these up I just don’t know why they are charging almost double for them it’s not worth the price even if they where made of gold
The G4 pack DOES NOT come with a thinner C4 plate, it comes with a machined C3 plate. This holds true with the G3 and I even believe Carbonite power packs. The C1 and C3 power packs receive machined plates, not C4.

https://www.altousa.com/downloads/tech-drawings/BM357BG4.pdf
 

Gman003

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Bdsankey

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Late model 6 speeds already have a thinner C4 plate. It's not a huge problem for me because I try to keep plenty of different thickness steels on hand, but if I'm buying a "one size fits all kit", I don't want to have to buy a bunch of extra stuff to make it work. For the at home, DIY guy, it'll be a problem because they won't have enough .098 steels to get the clearance where it needs to be.

I thought you were talking about the c3 I have an lb7 the apply plate is already thin I don’t think it can get much thinner
See Josh's post above. He was referencing C4 which is the original post you quoted as well.


How thin? I've cut them down to about .350" before
I typically run 0.400" C3 plates. That tends to allow me to use all 0.086" steels with minimal changes to get clearance where I want it.
 

Bdsankey

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I agree, 400 works pretty good. Usually toss an 098 in there to get in the 50's if needed
I target 0.045-0.055 on C3 and usually 0.050-0.065 on C4. I check everything dry then soak, after break in my clearances end up at roughly 0.008-0.010 per friction which seems to run well.
 

Gman003

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I target 0.045-0.055 on C3 and usually 0.050-0.065 on C4. I check everything dry then soak, after break in my clearances end up at roughly 0.008-0.010 per friction which seems to run well.
When do you plan on building with the g4s ? Let me know how you stack em and if you end up needing to thin the apply plate to get all the steels they come with, I don’t see in their instructions where it says to thin out the plates but I don’t know the first thing about rebuilding transmissions I’ll be pissed if my rebuilder doesn’t use all the plates or worse uses them without proper clearance