Motive 3.90 Gears for 7.5
07-07-2006, 08:00 PM
#1
TECH Fanatic
Thread Starter
Join Date: Feb 2006
Posts: 1,119
Likes: 0
Received 0 Likes
on
0 Posts
Motive 3.90 Gears for 7.5 
07-08-2006, 07:31 PM
#3
TECH Veteran
iTrader: (53)
Join Date: Feb 2004
Location: Monticello, Kentucky
Posts: 4,433
Likes: 0
Received 0 Likes
on
0 Posts
4.11 is a Ford ratio. I'm pretty sure there is no 4.11 ratio for GM rears. Yeah a 4.11 ratio in a Ford set is naturally gonna be stronger than 4.10's in a GM 7.5" 10 bolt.
07-09-2006, 06:39 PM
#4
On The Tree
iTrader: (4)
Join Date: Feb 2006
Location: Dalton Ga.
Posts: 133
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by dhdenney
4.11 is a Ford ratio. I'm pretty sure there is no 4.11 ratio for GM rears. Yeah a 4.11 ratio in a Ford set is naturally gonna be stronger than 4.10's in a GM 7.5" 10 bolt.
There are 4.11's for 7.5 10 bolts.........they have 37 ring teeth and 9 pinion teeth.
07-10-2006, 03:14 AM
#5
TECH Veteran
iTrader: (53)
Join Date: Feb 2004
Location: Monticello, Kentucky
Posts: 4,433
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by 30696bird
There are 4.11's for 7.5 10 bolts.........they have 37 ring teeth and 9 pinion teeth.
Well that's certainly a new one on me. I've never seen that one.
07-10-2006, 03:07 PM
#6
TECH Veteran
iTrader: (53)
Join Date: Feb 2004
Location: Monticello, Kentucky
Posts: 4,433
Likes: 0
Received 0 Likes
on
0 Posts
Ahh, looked on Motive Gear's website and there is no 4.11 ratio listed for any GM car. I was pretty sure there was no such thing as a 4.11 for a 7.5" 10 bolt. Richmond Gear lists no 4.11 either.
07-10-2006, 03:16 PM
#7
TECH Fanatic
Thread Starter
Join Date: Feb 2006
Posts: 1,119
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by dhdenney
Ahh, looked on Motive Gear's website and there is no 4.11 ratio listed for any GM car. I was pretty sure there was no such thing as a 4.11 for a 7.5" 10 bolt. Richmond Gear lists no 4.11 either.
Trending Topics
07-10-2006, 04:24 PM
#8
TECH Senior Member
iTrader: (1)
Join Date: Apr 2005
Location: Vancouver,[KITSILANO].B.C. Canada *WestCoast*
Posts: 8,810
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by 30696bird
There are 4.11's for 7.5 10 bolts.........they have 37 ring teeth and 9 pinion teeth.
07-10-2006, 04:30 PM
#9
TECH Veteran
iTrader: (53)
Join Date: Feb 2004
Location: Monticello, Kentucky
Posts: 4,433
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by NHRAMAN
Compared to ? ring teeth and ? pinion teeth..??? [ to 410's]
07-10-2006, 08:09 PM
#11
TECH Veteran
iTrader: (53)
Join Date: Feb 2004
Location: Monticello, Kentucky
Posts: 4,433
Likes: 0
Received 0 Likes
on
0 Posts
No what I'm saying is their catalog does not have 4.11 listed as a GM ratio. Also, you're saying they had 4.10s and 4.11s for the same rear when the catalog listed only one (the 4.10s).
07-27-2006, 10:55 AM
#12
Teching In
Join Date: Nov 2001
Location: Burlington, Ontario
Posts: 34
Likes: 0
Received 0 Likes
on
0 Posts
I just had the Motive 3.90 gears installed in my car last weekend. Its a nice compromise between the 3.73 and 4.10. No noise to speak of and the car drives very nicely now in 6th gear.
My previous best with 3.42s on street tires was 12.73 @ 112. I'm shooting for 12.4s with the gears + BFG drag radials.
My previous best with 3.42s on street tires was 12.73 @ 112. I'm shooting for 12.4s with the gears + BFG drag radials.
08-10-2006, 01:03 PM
#13
On The Tree
iTrader: (4)
Join Date: Feb 2006
Location: Dalton Ga.
Posts: 133
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by dhdenney
No what I'm saying is their catalog does not have 4.11 listed as a GM ratio. Also, you're saying they had 4.10s and 4.11s for the same rear when the catalog listed only one (the 4.10s).
So are THESE 4.11's? Or do they still not make them???? http://www.neweraperformanceparts.com/default.asp?S=503&A=E&PKV=6404568|0
08-10-2006, 02:13 PM
#15
TECH Fanatic
Thread Starter
Join Date: Feb 2006
Posts: 1,119
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by XXV ANN
I just had the Motive 3.90 gears installed in my car last weekend. Its a nice compromise between the 3.73 and 4.10. No noise to speak of and the car drives very nicely now in 6th gear.
My previous best with 3.42s on street tires was 12.73 @ 112. I'm shooting for 12.4s with the gears + BFG drag radials.
My previous best with 3.42s on street tires was 12.73 @ 112. I'm shooting for 12.4s with the gears + BFG drag radials.
If it's ascrew up or typo how can this guys have installed them ^^^^^
