C6 to ZF5 Conversion questions

[SparkandFire]

Wish I would have left work a little later yesterday, Warden... I was out at 2:00 on my way to Scotts Valley.

I left the guy a voicemail on the ZF5, but no call back yet. If he ever gets back to me, I'd like to drive out and check the thing out before I commit to it.

 

[SparkandFire]

I found this place that is selling the kit for $595.
http://www.clutchcityonline.com/dualMassFlywheel.htm

Would I order one for '87 year 6.9, or a 7.3 to match the ZF5 to my 6.9???

 

[Jake S.]

6.9 or 7.3 is the same part number... only the factory idit has a diff. number.

 

[SparkandFire]

Bingo! Thanks

What about the ZF flywheel bolts, since I don't have a donor truck, where could I get these?

 

[Jake S.]

I had the same size bolts holding the c6 flywheel flex plate on. I compared them side by side and they where the same. I scored, my zf has a pto hyd. pump, and a luk smf. And the disc still had the luk part number on the friction surface, I think it had 500 miles on it. It was from a f-superduty rollback with a 7.3.

 

[franklin2]

I had the same size bolts holding the c6 flywheel flex plate on. I compared them side by side and they where the same. I scored, my zf has a pto hyd. pump, and a luk smf. And the disc still had the luk part number on the friction surface, I think it had 500 miles on it. It was from a f-superduty rollback with a 7.3.

So the c6/luk aftermarket flywheel bolts may be the same length. I have also heard there are two different c6 flywheel/flexplate setups. My 89 c6 setup had the heavy flywheel with the starter gear on it, and a thin sheetmetal plate that the torque converter bolted to. This c6 combo vs the stock zf flywheel, I had to use the zf flywheel bolts, they were longer.

Whatever you use, check out the bolt length before using them. You can push the original bolt through the original setup you had, and get an idea how much threads you should have sticking through on your new setup.

 

[SparkandFire]

I'm going saturday morning to pick this thing up. Wish me luck

 

[Jake S.]

So the c6/luk aftermarket flywheel bolts may be the same length. I have also heard there are two different c6 flywheel/flexplate setups. My 89 c6 setup had the heavy flywheel with the starter gear on it, and a thin sheetmetal plate that the torque converter bolted to. This c6 combo vs the stock zf flywheel, I had to use the zf flywheel bolts, they were longer.

Whatever you use, check out the bolt length before using them. You can push the original bolt through the original setup you had, and get an idea how much threads you should have sticking through on your new setup.

Agreed, Franklin2 did you use the DMF? If so that might be the difference.

 

[The Warden]

FWIW, my LuK SMF kit came with new flywheel bolts....

 

[SparkandFire]

FWIW, my LuK SMF kit came with new flywheel bolts....

Thats good to know! Are you happy with the SMF?

 

[The Warden]

Thats good to know! Are you happy with the SMF?

So far, I'm very happy The only time I get any really noticeable roll-over noise is rolling at idle with a load, and even then, I don't find it annoying. I can't give it a 100% thumbs-up, only because some people have wondered about the possibility of a SMF eventually damaging the transmission, and I've only put 40K or so on my swap...so, it's really too early to say with any authority whether it'll be good in the long term or not. However, based on my experience so far, I would strongly recommend it over a replacement DMF or a Lucky Mod.

Just my $0.02...

 

[SparkandFire]

I'm not sure I understand what roll over noise is?

 

[Jake S.]

It's kind of indescribable till you hear it. Makes you wonder if you trans is going to blow. You'll get used to it. No, kidding. Not that bad. It is the noise of the gears "crashing" together with the power pulses of the diesel engine. It goes away at 900 rpm and up.

 

[The Warden]

It's kind of indescribable till you hear it. Makes you wonder if you trans is going to blow. You'll get used to it. No, kidding. Not that bad. It is the noise of the gears "crashing" together with the power pulses of the diesel engine. It goes away at 900 rpm and up.

What he said, basically. Come over the hill and I'll let you drive my truck although at some point in the fairly near future, she's going to Calvin's shop and being taken out of service for a while...

 

[SparkandFire]

I think at this point I am commited to making the swap, I'm going up saturday morning to pick this thing up.

Here is what I am getting from the guy-
ZF5 transmission
BW 1356 Transfer case
crossmember
front driveline
shifter and boot
slave cylinder
master cylinder and clutch pedal assembly

I am going to order the SMF conversion kit from www.clutchcityonline.com

Anything I am missing???