I am about to put CPMacs SMF/Dual disk street clutch in my truck. What happens to the warranty when i do this. For example, What if the rear main seal starts leaking sometime before the 100000 mile engine warranty expires, or anything in which the tranny needs to be removed. Will the dealer a) know how to reinstall the dual disk properly or b) do it at all once they realize its not a GM clutch? What if something mechanically fails in the tranny before 36000 miles (i have 18000 now) and my clutch isnt a GM clutch? are they going to blame it on my clutch and void it?

I guess its not that big of deal, but i was curious. Ive noticed some seepage around the oil filter mount/rear of motor area and was thinking about this. I'll prob have the dealer look at it before i get the new clutch flywheel installed.

Just curious....if it is still under warranty, why pay for aftermarket? Why not let the warranty cover as long as possible?

Just curious....if it is still under warranty, why pay for aftermarket? Why not let the warranty cover as long as possible?

A) Factory Clutch will not hold extra power
B) Dont have time or the patience to give my truck to the dealer for days at a time to put clutches in it
C) I can make the Factory clutch last but its starting to slip a little bit Juice lvl 1 in higher gears, so id have to not hammer it or take the juice off
D) Flywheel is covered until 100000 miles, there is no way id ever wait that long to put a new clutch in, thats like 3+ years

Do you like to go to the dealer all the time to have them put clutches and FW's in? I'd rather put something in that will hold the power i want to put through it and do it reliably.

A) Factory Clutch will not hold extra power
B) Dont have time or the patience to give my truck to the dealer for days at a time to put clutches in it
C) I can make the Factory clutch last but its starting to slip a little bit Juice lvl 1 in higher gears, so id have to not hammer it or take the juice off
D) Flywheel is covered until 100000 miles, there is no way id ever wait that long to put a new clutch in, thats like 3+ years

Do you like to go to the dealer all the time to have them put clutches and FW's in? I'd rather put something in that will hold the power i want to put through it and do it reliably.

Yea, I understand the aggravation of dealing with the stealer. Although I have a shortage of time....I have even more of a shortage of $$):h . I guess it is just a matter of which takes precidence?

I am needing a FW....does GM now have a new flywheel available....and replaced under warranty up to 100K.:confused:

If I was you I would go with SBC set up. That is what I am doing. I know that one guy was puttin 500HP and 1000TQ down on paper and not slip the clutch but that is a 100HP over what Peter at SBC said he would cover them for. I will be running the same program as the guy above so I will find out if it can hold that much power but Peter sounded pretty confindent that it would if I was to run it properly and as long as no sled pulling. As far as warrenty go's if you have a rear main seal go out I would say if the dealer would not warrenty it unless you have a VERY VERY nice dealer. The DMF is there for a reason...........to keep viberations down and more viberations the more likely it is to take out seals, bearings and possibly even mess with the computer. I know that Ford sucks but I have hear many fordsthat had their DMF changed out for the SMF that the viberations made them run like crap. Never heard of this with the Duramax and hope I don't but it just might. I hope this clutch set up works for me and I'll be sure to let you know how it works out. Also I know of several people who's dealer put the SBC in for them when they had the DMF replaced. Make sure they put the new DMF in for the SBC set up. The # is 24342324 or something close to that, it should be on one of the ZF pages I can't remember off the top of my head for sure but I think that is it:driver: .

The DMF is still the weak link with the SBC. I can't help but think that sooner or later it is going to come apart. I think it would be smart to take the dual disc set up out and put the stock setup back in if you suspect a major probem with the engine. When the dealer hears the truck growling from across the lot he's going to start asking a lot of questions. With the growing number of aftermarket parts for the Dmax, GM has instructed dealers not to warranty trucks that they find to be modified. GM would blame the rear main on the SMF and probably void the rest of the engine warranty. Just my .02

The DMF is still the weak link with the SBC. I can't help but think that sooner or later it is going to come apart. I think it would be smart to take the dual disc set up out and put the stock setup back in if you suspect a major probem with the engine. When the dealer hears the truck growling from across the lot he's going to start asking a lot of questions. With the growing number of aftermarket parts for the Dmax, GM has instructed dealers not to warranty trucks that they find to be modified. GM would blame the rear main on the SMF and probably void the rest of the engine warranty. Just my .02

Really, you think so (that the dealer would void engine warranty all togather with a aftermarket clutch)? That kinda scares me about puttin in a clutch. I thought the heavier duty models with the 6.6 duramax (4500 and whatever else uses the 6.6) have a SMF Flywheel from the factory with the manual trans, is that correct? If it is correct, wouldnt GM warranty a duramax with a SMF mounted to it? Anyone chime in here.

Also, do you think the SMF will cause problems with the motor? I was under the impression that the SMF solved the problems with the DMF and didnt affect reliability of the motor, and that the increase noise from the SMF was just a small side effect.

I had a 02 and a 04 truck. GM bought the 04 back for flywheels. During the process I told GM that if they would buy a aftermarket flywheel that I would settle for that but then they said that would be liability issue for them so they couldn't do that. Before I went thru the buy back process the service manager said that GM would pay for the aftermarket flywheel. But he was one of the guys that went thru the same DMF problems in 6.5 diesels

I don't know for sure, but if I suspected an engine problem I would not take the chance. I had a dual disc clutch in my 03 and liked it pretty well. I don't think the SMF causes any problems, but I'm not sure you will convince GM of that. All I do know is that GM does know about all the aftermarket and they are watching for it. Some dealers are better than others when it comes to aftermarket. My dealer was pretty good, but they are getting the talking to from GM about working on modded trucks. One thing I would bet money on is that if you had a problem that required a regional service rep to come in and he found something he didn't like you would have a problem. The problem with the SMF is that there is no way to hide it. As soon as you let off the clutch at an idle the growling is very noticable. It's just my opinion that you really can't have it both ways... a pullin' clutch and a GM warranty. I would upgrade the clutch, but just remove it if I had an issue that may be expensive. Just remember if you go in for another minor issue the dealer may note in your record the clutch change. My dealer actually noted that I had a fumoto drain.

I don't know for sure, but if I suspected an engine problem I would not take the chance. I had a dual disc clutch in my 03 and liked it pretty well. I don't think the SMF causes any problems, but I'm not sure you will convince GM of that. All I do know is that GM does know about all the aftermarket and they are watching for it. Some dealers are better than others when it comes to aftermarket. My dealer was pretty good, but they are getting the talking to from GM about working on modded trucks. One thing I would bet money on is that if you had a problem that required a regional service rep to come in and he found something he didn't like you would have a problem. The problem with the SMF is that there is no way to hide it. As soon as you let off the clutch at an idle the growling is very noticable. It's just my opinion that you really can't have it both ways... a pullin' clutch and a GM warranty. I would upgrade the clutch, but just remove it if I had an issue that may be expensive. Just remember if you go in for another minor issue the dealer may note in your record the clutch change. My dealer actually noted that I had a fumoto drain.

Alright, yeah that was what i was thinking. Dont think the SMF would cause any problems but yeah i agree GM would probably think opposite, although since GM does have lots of problems with the DMF i might have some leverage on a SMF, but still they would have the last word. I guess we could compare a SMF with like any programmer. Pretty much accepted that it doesnt do any mechanical damage (when used REASONABLY) but GM will probably void your warranty when they can find anyway to relate the work that needs done to what youve added. I guess the only problem is the clutch is a little harder to take out and bring to the dealer than a programmer.

I'm not going to be sled pulling with the truck or anything, I only want a clutch that will last a long time and i can mash the throttle in higher gears juice lvl 5 and not have it slip. I will not be slipping my clutch intensionally.

I had a 02 and a 04 truck. GM bought the 04 back for flywheels. During the process I told GM that if they would buy a aftermarket flywheel that I would settle for that but then they said that would be liability issue for them so they couldn't do that. Before I went thru the buy back process the service manager said that GM would pay for the aftermarket flywheel. But he was one of the guys that went thru the same DMF problems in 6.5 diesels

When you say aftermarket flywheel, do you mean a SMF?

That clutch will hold that + so I think you will be happy. It is a good feeling to have an actual clutch under you:ro) .