ACT Diamond Drive or Chain Case - Snowmobile Forum: Your #1 Snowmobile Forum

gman250 · 12-06-2005, 02:25 PM

What’s the verdict on the pros/cons?

I know Diamond is smoother and chops about 11 pounds
But no reverse with the Diamond Drive.

Anybody got any info on acceleration or top speed comparisons?

Happy Holidays!

sesnopro · 12-06-2005, 08:53 PM

both work well, chian would be better if you dont know much about mechanics, DD will out preform a chian though.

letitsnow · 12-06-2005, 09:24 PM

could someone explain diamond drive? is it a gear drive instead of chains?

sesnopro · 12-07-2005, 01:14 PM

there is 2 gears that run of each other , after that there is a planetary set(john deere) that spins the track

Why john deere you ask? the ACT DD drive is the same as a john deere tractor rear end more or less.

snowandski88 · 12-07-2005, 01:23 PM

DD also allows for lower RPM engagment which will reduce trenching for people who like powder.

IndianRvrShiver · 12-07-2005, 03:09 PM

All this sounds like mumbo-jumbo!! There is no functional difference other than the weight savings, mentioned by g-man. The DD does nothing the chaincase doesn't do, which is simply transfering the rotation of the jack shaft to the drive shaft. Each has the ability of gear reduction. The DD is simply better for weight & package! All clutching theory remains the same! Acceleration & top speed are uneffected.

skidoo_magoo · 12-07-2005, 03:28 PM

why cant they have reverse with a DD?

sesnopro · 12-07-2005, 04:26 PM

cat still has mechanical reverse.

no advantages!? how about never having to replace/worrie about the chain, less parasidic losses and no jackshaft + a more responsive brake.

bottom line less parts do more, is a winner in my book.

IndianRvrShiver · 12-07-2005, 04:41 PM

Quote:

Originally posted by sesnopro
cat still has mechanical reverse.

no advantages!? how about never having to replace/worrie about the chain, less parasidic losses and no jackshaft + a more responsive brake.

bottom line less parts do more, is a winner in my book.

No jackshaft!!???? How does the power get from the 2ndary to the gearbox??

Nobody said "no advantages!" Just said they do the same thing!!

Time to read things a little better, sesnopro!!

sesnopro · 12-07-2005, 06:42 PM

Diamond Drive does not use a jackshaft becuse the gear case is on the pto side of the sled, thus the driven clutch is conected directly to the upper gear and the brake rotor is on the drive shaft. they are no were near the samething, plus it looks like you need to study a bit more IndianRvrShiver if you dont even know how Diamond Drive works.

jtman04401 · 12-07-2005, 08:35 PM

Quote:

Originally posted by gman250
What’s the verdict on the pros/cons?

I know Diamond is smoother and chops about 11 pounds
But no reverse with the Diamond Drive.

Anybody got any info on acceleration or top speed comparisons?

Happy Holidays!

Do you want reverse in your sled? If so dont even bother to look at any with the diamond drive... no reverse option available.

I will stick with my chainase thank you.

IndianRvrShiver · 12-07-2005, 08:43 PM

You're correct...no conventional jackshaft!! I humbly bow down to you sesnopro!!
But I stand by my original post that they perform the same function, namely transfering the torque from the 2ndary to the track, albeit, with less weight, moving parts & better package. Conventional clutching theory/practice still holds. The DD has no effect on acceleration or top speed which was the original question posted by gman.

gman250 · 12-09-2005, 11:38 AM

Thanks for all the reply’s. A good friend of mine chose chain on his new 06 F7 and reverse being the only reason why. Electronic reverse of some sort, BRP style, would be far better than the mechanical setup on my 04 F7. I know my 04 700XCSP reverse was outstanding. I do believe they traded that technology with BRP.

Anyway, 30cm of snow coming tonight. I think we may get our first ride tomorrow.

Happy Holidays and safe sledding!

skidoo_magoo · 12-09-2005, 07:11 PM

couldnt be, because your engine doesnt stop and run backwards...

yeah, do some riding! ill be out this weekend.