1993 Corvette Convertible- Auto 2.59 Swap
#21
Team Owner
Member Since: Oct 2004
Location: altered state
Posts: 81,242
Received 3,043 Likes
on
2,602 Posts
St. Jude Donor '05
Happy wife,
The following users liked this post:
Skylar'sDad (10-12-2017)
#23
Instructor
I installed the Yukon 3.54 thick gear in my 1993 and really like it. I almost wish I'd gone with a 3.73! With the stock 2.59's, 85 mph was around 1800 rpm's and 28 mpg. Now at 85 mph, it's around 2600 - 2700 rpm's and 18 mpg. Although mileage isn't a big concern for me since it's not a Daily Driver, it still gets (according to the computer) around 25 mpg at 78 mph. After this speed, the mpg drops considerably. Although the gear was a big difference in SOTP feel, the long tube headers I installed after the gears seemed to do more than the gear. Of course, this could have been due to the combination. If it was my money, I wouldn't go less than a 3.54 and not more than a 3.73, unless you are going to really bang on it. Then the Dana 44 would be the recommended route to take. Good luck with whatever you decide.
Last edited by Boss Lady; 10-12-2017 at 08:43 PM.
The following users liked this post:
Bentsi (10-15-2017)
#24
Intermediate
Thread Starter
I installed the Yukon 3.54 thick gear in my 1993 and really like it. I almost wish I'd gone with a 3.73! With the stock 2.59's, 85 mph was around 1800 rpm's and 28 mpg. Now at 85 mph, it's around 2600 - 2700 rpm's and 18 mpg. Although mileage isn't a big concern for me since it's not a Daily Driver, it still gets (according to the computer) around 25 mpg at 78 mph. After this speed, the mpg drops considerably. Although the gear was a big difference in SOTP feel, the long tube headers I installed after the gears seemed to do more than the gear. Of course, this could have been due to the combination. If it was my money, I wouldn't go less than a 3.54 and not more than a 3.73, unless you are going to really bang on it. Then the Dana 44 would be the recommended route to take. Good luck with whatever you decide.
The following users liked this post:
Bentsi (10-15-2017)
#25
Intermediate
Thread Starter
This is what I am going to do....
I do want more punch and I did have a 3.08 in my 1970 Vette, so to that end I have opted for the 3.36 rear end. It is a custom gear that Mike's Corvette offers in Anaheim.
It will have more get up and go, plus Mike's will handle the whole speedometer issue which I know is a complete pain for Vette's from 91-93 before the new on-board computer in 1994, which makes everything much more simple.
Thanks for all the input, I will let you know how it goes...
It will have more get up and go, plus Mike's will handle the whole speedometer issue which I know is a complete pain for Vette's from 91-93 before the new on-board computer in 1994, which makes everything much more simple.
Thanks for all the input, I will let you know how it goes...
#26
Le Mans Master
Member Since: Dec 2005
Location: Where Woke Goes to Die
Posts: 8,194
Received 615 Likes
on
431 Posts
Maybe slightly irrelevant because of the car type.... but I had a 79 z28 that came stock with a 2.73 and upgraded to a 3.73.... It was a very nice upgrade and woke the car up considerably.
The following users liked this post:
Skylar'sDad (10-13-2017)
#27
Instructor
I have a 95 coupe automatic and went from a 2.59 to the 3.54 from Zip corvette parts and couldn't be happier. 2000 rpm at 70 yields about 18 mpg but the additional punch during acceleration is worth all the money.. this ratio is what chevy should have used from the start. you will not be disappointed.
Last edited by jgalfo; 10-19-2017 at 06:41 PM.
#28
I do want more punch and I did have a 3.08 in my 1970 Vette, so to that end I have opted for the 3.36 rear end. It is a custom gear that Mike's Corvette offers in Anaheim.
It will have more get up and go, plus Mike's will handle the whole speedometer issue which I know is a complete pain for Vette's from 91-93 before the new on-board computer in 1994, which makes everything much more simple.
Thanks for all the input, I will let you know how it goes...
It will have more get up and go, plus Mike's will handle the whole speedometer issue which I know is a complete pain for Vette's from 91-93 before the new on-board computer in 1994, which makes everything much more simple.
Thanks for all the input, I will let you know how it goes...
#29
Team Owner
Member Since: Oct 2004
Location: altered state
Posts: 81,242
Received 3,043 Likes
on
2,602 Posts
St. Jude Donor '05
never seen someone add gear and regret it..3.45 or so should be the minumim in these cars, 307 or 2x is just for mileage..pukey boring EPA gears. Hit the gas pedal and have lunch waiting for the car to pick up speed.
Know they call those gears performance, they are anything but
Even my 02 truck came stock with a 3.73 posi
Know they call those gears performance, they are anything but
Even my 02 truck came stock with a 3.73 posi
#30
never seen someone add gear and regret it..3.45 or so should be the minumim in these cars, 307 or 2x is just for mileage..pukey boring EPA gears. Hit the gas pedal and have lunch waiting for the car to pick up speed.
Know they call those gears performance, they are anything but
Even my 02 truck came stock with a 3.73 posi
Know they call those gears performance, they are anything but
Even my 02 truck came stock with a 3.73 posi
#31
Team Owner
Member Since: Oct 2004
Location: altered state
Posts: 81,242
Received 3,043 Likes
on
2,602 Posts
St. Jude Donor '05
I hear ya ...noticed the newer vettes have 2.something gearing they just use deeper trans gearing..euro cars have been doing it forever
Thats a joke must be an EPA thing
What fun is the car if youre romping on it and cant get out of 1st or 2nd gear?
Thats a joke must be an EPA thing
What fun is the car if youre romping on it and cant get out of 1st or 2nd gear?
Last edited by cv67; 10-15-2017 at 01:19 PM.
#32
First gear ratio
#33
Intermediate
#34
I also have the 2.59, and interested in readin the responses.
Small world! I'm in Irvine too, and looking for a closer shop rather than trekking all the way to J&D in Bellflower. Would you recommend this shop?
I just found out about those guys a week ago, and dropped my car off today at Mark's! Met Scott too, really friendly guys!
I do want more punch and I did have a 3.08 in my 1970 Vette, so to that end I have opted for the 3.36 rear end. It is a custom gear that Mike's Corvette offers in Anaheim.
It will have more get up and go, plus Mike's will handle the whole speedometer issue which I know is a complete pain for Vette's from 91-93 before the new on-board computer in 1994, which makes everything much more simple.
Thanks for all the input, I will let you know how it goes...
It will have more get up and go, plus Mike's will handle the whole speedometer issue which I know is a complete pain for Vette's from 91-93 before the new on-board computer in 1994, which makes everything much more simple.
Thanks for all the input, I will let you know how it goes...
S D, the corvette shop,,,,, its close by in costa mesa on logan st,,, also the guy next door is mike mcphail, he used to work for gm, and was responsible for a lot of special engineering that went into the lt1 engine, he also tuned and repaired mine, i will contact you via private email .
#35
I wish we had a shop here in South Florida that could do the whole job. Best I can find is one shop to pull the "Pumpkin" and then I take it to another shop to rebuild the differential including the new gear. I'm looking at a possible conflict between shops if the guy installing the new gears isn't on the same schedule as the shop that removes and replaces the differential. I feel like I might become a Ping Pong ball in this deal and it bothers me.
Any South Florida guys on the forum know of a local shop that will do the total job ?
Any South Florida guys on the forum know of a local shop that will do the total job ?
#37
Ft. Lauderdale/Davie...moving to Ocala before year end.
Last edited by sprink94; 10-22-2017 at 07:42 PM.