3:07 diff change
Safety Car
Joined: Apr 2003
Posts: 3,793
Likes: 9
From: VA
Originally Posted by IBEAM700
http://www.motivegear.com/
These peeps have a 3.31.... Was the 84 D36 carrier in some way different from the rest so that this gear would not work for the mass's
These peeps have a 3.31.... Was the 84 D36 carrier in some way different from the rest so that this gear would not work for the mass's
It is for a 3-series case however, so still doesn't help the masses with 2.59 & 2.73.
Intermediate
Joined: Feb 2004
Posts: 49
Likes: 0
From: Hilton Head sc
3:73s
I replaced the 2:59 rear in my 87 automatic with 3:73 Richmond gears.
It runs teriffic and although I may have lost a few MPG, its not that noticable and the low end performance is awsome.
Don't be afraid to go with the 3:54 or the 3:73.
However if you're on the highway alot (which I'm not), then I'd say think again.
It runs teriffic and although I may have lost a few MPG, its not that noticable and the low end performance is awsome.
Don't be afraid to go with the 3:54 or the 3:73.
However if you're on the highway alot (which I'm not), then I'd say think again.
Le Mans Master
Joined: Jan 2003
Posts: 6,186
Likes: 309
From: SIMSBURY CT
St. Jude Donor '07 thru '25
I read a lot of threads about gears this year and just got 3:07s in my 89 automatic. Feels stronger, RPMs a little higher (and probably a little worse gas mileage) and I'm happy with the overall performance. Unless you really plan to do some serious engine mods the 3:07s should give you the best overall performance on the street.
Thread Starter
Burning Brakes
Joined: Sep 2003
Posts: 813
Likes: 1
From: Middle Tn
CTYANK2, how hard is the hardtop to put on? Mine is setting in the garage and I have never put it on and would like to put it on for a while. I still have to go with the 54's because I want that throw you in the back seat(if I had one) accelaration off the line. I know the 07's are probably better for cruisin, but like I said, our vette has only had a little over a thousand miles put on it in about 1 1/2 years, so it won't hurt anything with the 54's in it.
Le Mans Master
Joined: Jan 2003
Posts: 6,186
Likes: 309
From: SIMSBURY CT
St. Jude Donor '07 thru '25
Hardtop installation is easy but it takes two people to lift it up and put it in place. Then two windshield bolts, 2 rear deck bolts (pain in the ___ due to tight space), and two brackets with 5 bolts each side. Once it is on your car you will have more stiffness than coupes. Good luck with the 3:54s.
Melting Slicks
Joined: Sep 2001
Posts: 2,068
Likes: 1
From: Gig Harbor WA
I get 20 MPG in a LS1 Camaro w 3.42 and a manual w around town and highway mixed. I almost never use 6th gear, and I always drive the car really hard hitting 100mph on a daily basis.
If you have an overdrive tranny there is no reason not to run the 3.54, you'll be happy enough w the mileage.
The power band will really tighten up around and out of corners.
You'll love it if you like to drive hard.
I went from 3.07 to 3.73 in the Dana 44 C4. You can buy my 3.07s for $35+ shipping, I had a local rearend shop do the swap and freshen the rearend for $400 for gears parts and labor.
Do you have a Dana 36 to start with?
If you have an overdrive tranny there is no reason not to run the 3.54, you'll be happy enough w the mileage.
The power band will really tighten up around and out of corners.
You'll love it if you like to drive hard.
I went from 3.07 to 3.73 in the Dana 44 C4. You can buy my 3.07s for $35+ shipping, I had a local rearend shop do the swap and freshen the rearend for $400 for gears parts and labor.
Do you have a Dana 36 to start with?
Originally Posted by 91redragtop
can anyone give me a quesstimate on how much mpg's I would get with 3:54's? I don't want to get down to 13 or 14 mpg's. You did come up with a good point about traction. I can light up the tires and smoke them nonstop with the 2:59's in it so 54's might make it hard to get going. My biggest gripe with my 91 is the rolling punch from say 40 and above. It just doesn't pull like I think that it should. It pulls hard but my 95 Impala SS with just a few minor mods feels like it pulls harder and the vette has more torque. I know that it has 3:08 gears in it, but it weighs a ton(hi-po land barge). That is what I want to improve the most. Maybe it is just me but my 91 doesn't pull that great from dead stop. I have found that starting off and then nailing it at about 10 mph makes it pull strong. It will catch second doing that but won't from a dead start. That is why I am highly considering the 54's, so it will be evil when you nail it. More opinions please. Hopefully someone with 54's will chime in.
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 32
From: The Top of Utah
Originally Posted by 91redragtop
If your 3:07 ring and pinion is in good shape and will fit a D36. Then consider them sold. PM me and we will make arrangements.
Originally Posted by Evan Ginsberg
I went from 3.07 to 3.73 in the Dana 44 C4. You can buy my 3.07s for $35+ shipping.
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Safety Car
Joined: Apr 2003
Posts: 3,793
Likes: 9
From: VA
Originally Posted by 91redragtop
Steve 9899, give me the scoop on 2 series carrier. What exactly are we talking about here?
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 32
From: The Top of Utah
Originally Posted by steve9899
If your car came from the factory with 2.xx gears it has a different carrier than if it came with 3.xx gears. Gears are not interchangeable between the two. Aftermarket gears specify which carrier they fit.
RACE ON!!!