Evaporate

iTrader: (22)

Hi,
I just spoke with a gear shop who refuses to warranty 3.90 gear installs. He said they are made in China and recommended 3.73 or 4.10s. I've never heard this, but I do notice far fewer 3.90 gear owners out there. What is the consensus on these?
I'm considering this over my current 3.42s for my blown lt1 with a 12 bolt.

HCI2000SS

iTrader: (2)

Sounds like a bunch of crap to me

Midnight02

iTrader: (8)

Hmmm. I know the 3.90 isn't offered as widely as the 3.73s and 4.10s, however I haven't heard anything of the sort.

Frankly, I had always heard the 3.90s were stronger due to having fewer ring teeth (39/10 for the 3.90 versus 41/10 for the 4.11 and 41/11 for the 3.73).

Evaporate

iTrader: (22)

I would like to agree. Just that this shop has been around for quite some time and he seemed to speak with confidence on the topic.

Evaporate

iTrader: (22)

Agreed on the teeth comment. The shop owner kept remarking about Motive and another name I can't recall that are only made in China and as unreliable.

01ssreda4

iTrader: (96)

Ask him his source for info.

HCI2000SS

iTrader: (2)

I ran Motive 3.90s in my Mustang for 5 years, and never had a single issue. If I were you I'd call around to other reputable sources, and do your own research as well. I think you just might find that this shop may not know as much as you think on this matter

springer_4

iTrader: (9)

I Picked Motive 3.90's over 4.10's for my 6-Speed and have never looked backed, And I did plenty of research.

pozesd99'

iTrader: (3)

My 3.90's are going strong with many miles of abuse with drag radials, m6 amd stock 10 bolt with my stroker motor!

MidwestChassis

iTrader: (5)

Your shop is misinformed on motive gears.