bcstang

hey guys, i found a set of 3.90 gears from motive and im wondering if anyone here knows anything about these. i keep hearing all these split arguments of people saying the 4.10 have too much pull and rpms go too high on the highway, and some ppl say that 3.73's dont have enough oomph. so does anyone out there know why 3.90's arent more popular or if there is some inherent problem with them that i dont know about?

Sherwood06GT

I think one reason is that FRPP does not offer the 3.90s. Motive has a reputation of being noisy. If FRPP make the 3.90s I would probably go with them.

Caution

it's all in the install... I have FRPP 410's but hear that the motive are fine if properly installed... look for a shop in your area that has experience in doing motive gears ~ J

Razorsedgepit06

The 3.90 is a good gear. Theres not too much of a difference between that and a 4.10, but like others said, be sure to have them installed right from an experienced shop and you should be good.

28HopUp

You can adjust final gear ratio by changing rear tire diameter too. I have 4.10's, but my DR's are 28", which adjusts my final ratio to about 3.9x:1. A shorter tire (<26") on 3.73's will put you near 3.9x's as well. So you need to take rear tire diameter into consideration before deciding are gears.

Dex

also where youre finishing at the end of the 1/4

bcstang

so if im putting on some nitto 555's, with my foose 20" rims i should get 4.10's because itll feel like 3.90's?

28HopUp

I run outa 3rd around 90mph, so I have to shift into 4th gear before the traps. My MPH rises if I short-shift 1-2 and 2-3. My best ET so far is 14.475 @ 94.95mph, which had a 1.959 60' time. I will be picking up a complete 7.5" with 3.73's/t-lok, so I can try it with both rears to see if I drop my ET with the 3.73's by avoiding the 3-4 shift.


That depends on the aspect ratio of your Nitto's. Stock tire diameter for 16" V6's, 17" Pony Packages and 17" GT's is about 27", which is roughly 770 revs per mile. You need to determine the diameterfor those Nittos and then decide on gears.

CataclysmGT

Lethal Performance says for the most part, Motive makes FRPP gears.

05slpGT

That is correct! Ive heard that many many times from different shops..
I have motives, i have gear whine, its not that bad, radio eliminates it for the most part, unless im going 60 then its really loud.
But im taking it back to the shop the guy is going to readjust where the gear is sitting until the whine goes away.