Blk98Bird

Hey guys, I'm thinking of doing a cam down the line and I have a question or two. After 2-3 years or so of EXTREME gear whine with 4.10's (speed inc. told me it was one of the worst they've heard) I was wondering if it would be at all worth it to gear back down when doing something like a 224/228 cam...maybe 112 lsa?

This car is basically street only and daily driven, so I'd like something that acts fairly tame but also performs very well. I daily drive it around town but also spend a LOT of time on the highway so I'd like to compromise but wouldn't mind biasing a little toward top end. Car would also have longtubes by the time the cam was installed and this would all run through a cut-out.

So would I be losing a lot of performance gearing down to something with less whine like stock 3.42s, or would this be possible? How would the car behave on the low end with 4.10s/stock cam vs. stock 3.42s/new cam?

Thanks a bunch

SSpdDmon

iTrader: (10)

Get some AAM 3.73's. They are OEM and shouldn't whine an ounce if installed right.

Sponsor: Scott will get 'er done.

Blk98Bird

K I can look into those possibly. The problem is that I used GM motives which are supposed to be quiet and ls1 speed told me it wasn't the gear but the way my rear was taking them

Not sure how much validity there is to that statement or if that effects the 3.73 decision?

wilddawg

any cam with more duration than a 224 will like 3.42 or 3.73's and you can get thecorrect back lash with more teeth you need .008 to .010 back lash

SSpdDmon

iTrader: (10)

Motive's are made in Italy. AAM is here in Detroit. I doubt Motive supplies GM. I'm pretty sure they wouldn't ship heavy metal parts 4,000+ miles. The logistics cost would be a little high.

Blk98Bird

I might not be understanding what you're saying, but every time i've ever seen GM gears labeled for sale it's been as "GM Motive Gears." They came up as such on a google search as well.

Blk98Bird

Do you mean that 3.42's or 3.73s would be matched to a cam like that better than 4.10s or just that they'd be acceptable if I wanted to drop down? I wouldn't mind trying out a new set of 4.10s if I absolutely had to in order to get the most out of the car. I don't mind the way it drives, just the whine is pissing me off after all these years.

SSpdDmon

iTrader: (10)

What other OEM makes a rear like ours? Maybe that's why they call them GM gears...because of their application.

I've got Motives in both of my f-bodies, both 3.73's and both make noise. I don't hear factory installed 3.73 rears in GM pickups making that kind of noise.

orangeapeel

iTrader: (18)

Ha! Motive gears are some crying mother scooters! Quiet my ***....