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View Full Version : Avanti rear gears??????



14x7
07-29-2009, 11:25 AM
What gears were in the avanti's when sold?;)sounds like they were steep gears i.e. (4:10)[8D]

sbca96
07-29-2009, 12:17 PM
Depends on the transmission, my '63 R1 with 3 spd MANUAL had a 3.73.

Tom

'63 Avanti, zinc plated drilled & slotted 03 Mustang Cobra 13" front disc/98 GT rear brakes, 03 Cobra 17" wheels, GM alt, 97 Z28 leather seats, soon: TKO 5-spd, Ported heads w/SST full flow valves, 'R3' 276 cam, Edelbrock AFB Carb, GM HEI distributor, 8.8mm plug wires

WCP
07-29-2009, 12:43 PM
I believe 3.73 was standard but 3.31 to 4.09 could be ordered. My 1st Avanti was originally shipped to Hawaii and had a 4.09 open end rear axle. It eventually came to Canada and then later purchased by me. I changed the rear end to a 3.31 for better cruising (R1 with A/C).

WCP
07-29-2009, 12:44 PM
I believe 3.73 was standard but 3.31 to 4.09 could be ordered. My 1st Avanti was originally shipped to Hawaii and had a 4.09 open end rear axle. It eventually came to Canada and then later purchased by me. I changed the rear end to a 3.31 for better cruising (R1 with A/C).

Gunslinger
07-29-2009, 12:48 PM
I was under the impression for Avanti's (automatics anyway), 3.31 was standard. I've also heard all cars were changed to a 3.73 as standard after a certain point. I do know my '70 Avanti has a 3.31 rear.

Gee...isn't figuring out what was standard and not with Studebakers fun?




Poet...Mystic...Soldier of Fortune. As always...self-absorbed, adversarial, cocky and in general a malcontent.

41 Frank
07-29-2009, 12:56 PM
3.54 was another ratio available.

tluz
07-29-2009, 03:58 PM
Mine is an automatic that came with 3:31. According to theavanti.com website's technical data (haven't checked Bob Johnstone's site) 3:31 was standard for automatics and 3:73 was standard for 4-speeds.

nels
07-29-2009, 04:11 PM
It seems like 3.31 was std in 63 for the R1 and 3.73 for the R2, also in 1963. Then in 64 all had 3.54 as standard.
I think gears offered were 2.87 through 4.89 or 5.13 (?). I know there were some production 4.55 axles built.

StudeRich
07-29-2009, 04:16 PM
quote:Originally posted by tluz

Mine is an automatic that came with 3:31. According to theavanti.com website's technical data (haven't checked Bob Johnstone's site) 3:31 was standard for automatics and 3:73 was standard for 4-speeds.

Usually it had more to do with whether an R1 or an R2 Engine was ordered, they wanted the R2's to PERFORM! and they usually have 3.73's.

At 35.9 cents for Super Premium, Chevron Custom Supreme 100 plus octane (White Pump), that was not a concern! [:p]

StudeRich

PackardV8
07-29-2009, 04:39 PM
To add to the confusion, my OEM [u]Studebaker Avanti Workshop Manual</u> says in General Specifications, page 7:

Not Supercharged
3-speed - 3.31
4-speed - 3.73
Auto - 3.34 (sic)

Supercharged
4-speed - 3.73
Auto - 3.73

Optional ratios: 3.07, 3.31, 3.73, 4.09, 4.55

Note that 3.54 is not listed as available.

thnx, jack vines



PackardV8

StudeRich
07-29-2009, 04:50 PM
quote:Originally posted by PackardV8

Note that 3.54 is not listed as available.

Jack, when it comes to Parts Issues, I have found the Parts Catalogs and even the Sales brochures, to be way more accurate than the Shop Manual.
Notice I did NOT say they are PERFECT, however! :D

I am sure you remember when we all bought those traction bar equipped Twin Traction complete 44 axle assy's in 3.54, 4.09 etc. at Newman & Altman at giveaway prices, about $125.00 in the 1970's! [^]

StudeRich

PackardV8
07-29-2009, 05:26 PM
FWIW, the green pages Jet Thrust Engine Equipment Parts Manual does list the 3.54 ratio as available for Model 64V only.

thnx, jack vines

PackardV8

DEEPNHOCK
07-29-2009, 07:20 PM
Be aware that a 3.73 and up swap will require a different carrier, if yours is lower.. (and vice versa)
Jeff[8D]

http://i77.photobucket.com/albums/j54/deepnhock/1937CEBearfootingArtwithLabelgif-1.jpghttp://i77.photobucket.com/albums/j54/deepnhock/SDClogo4forum.jpghttp://i77.photobucket.com/albums/j54/deepnhock/StudebakerTruckFarmerStickerA-1.jpghttp://www.racingstudebakers.com/avatar_01.jpghttp://i77.photobucket.com/albums/j54/deepnhock/GatorDadBigjpg-1-1.jpg

http://community.webshots.com/user/deepnhock

Chicken Hawk
07-29-2009, 10:06 PM
I believe the 3.92 and up NUMERICALLY takes a different carrier than the 3.73 and down NUMBERICALLY.

Ted


quote:Originally posted by DEEPNHOCK

Be aware that a 3.73 and up swap will require a different carrier, if yours is lower.. (and vice versa)
Jeff[8D]

http://i77.photobucket.com/albums/j54/deepnhock/1937CEBearfootingArtwithLabelgif-1.jpghttp://i77.photobucket.com/albums/j54/deepnhock/SDClogo4forum.jpghttp://i77.photobucket.com/albums/j54/deepnhock/StudebakerTruckFarmerStickerA-1.jpghttp://www.racingstudebakers.com/avatar_01.jpghttp://i77.photobucket.com/albums/j54/deepnhock/GatorDadBigjpg-1-1.jpg

http://community.webshots.com/user/deepnhock

DEEPNHOCK
07-29-2009, 10:13 PM
My notes said 3.73, but I write funny...
If I erred I apologize.
Just don't want people to shop and need extra stuff...
Jeff[8D]


quote:Originally posted by Chicken Hawk

I believe the 3.92 and up NUMERICALLY takes a different carrier than the 3.73 and down NUMBERICALLY.
Ted

[quote]Originally posted by DEEPNHOCK

Be aware that a 3.73 and up swap will require a different carrier, if yours is lower.. (and vice versa)
Jeff[8D]

Avantidon
07-30-2009, 07:01 AM
3.73 was the standard gear for most automatics especially all of the R-2s

Bob Langer
07-30-2009, 07:58 AM
From the Avanti dealer order guide.


http://i242.photobucket.com/albums/ff143/regnalbob/scan-10-1.jpg

Bob Langer
Glenshaw,PA

http://i242.photobucket.com/albums/ff143/regnalbob/cropped-1.jpg

StudeRich
07-30-2009, 03:06 PM
Yep; that makes sense Bob, if you had a bunch of '64 R2's & R3's running around with 3.73 or the optional in '63, 4.09 TT, you could have too many warranted Clutches, U-Joints, T-10's and maybe a few Engines to replace! They may have learned that in '63!

Of course for the Track/Strip, they did offer a Competition Clutch and optional dual valve springs, hotter Cam and even lower axle ratios for the R3, and that kind of obvious abuse would void the warranty anyway. [^]

StudeRich

Laemmle
07-30-2009, 07:32 PM
My Avanti was shipped with 3:54 gears....still wish I had taller gears....want better mileage and less stress on the block.




quote:Originally posted by StudeRich

Yep; that makes sense Bob, if you had a bunch of '64 R2's & R3's running around with 3.73 or the optional in '63, 4.09 TT, you could have too many warranted Clutches, U-Joints, T-10's and maybe a few Engines to replace! They may have learned that in '63!

Of course for the Track/Strip, they did offer a Competition Clutch and optional dual valve springs, hotter Cam and even lower axle ratios for the R3, and that kind of obvious abuse would void the warranty anyway. [^]

StudeRich

sbca96
07-31-2009, 12:25 AM
quote:Originally posted by Laemmle

My Avanti was shipped with 3:54 gears....still wish I had taller gears....want better mileage and less stress on the block.

A TKO 5 spd will fix you right up.;)

Tom

WCP
07-31-2009, 12:42 PM
My R2/T5 with 0.63 5th and 3.73 rear needs 60+mph to stay in 5th. Shows 21-2200 rpm at 115kph or 71mph. - definitely a thruway gear!