Help with speedo gears

Reply Subscribe

Thread Tools

Search this Thread

Jan 29, 2007 | 10:29 PM

gyopp

Thread Starter

Burning Brakes

Joined: Feb 2006

Posts: 1,173

Likes: 5

From: Paducah Ky

Help with speedo gears

Does anyone know what drive and driven gears should be in a 77 L48 with a T350 ???????????
Thanks

Jan 29, 2007 | 11:24 PM

Big2Bird

Le Mans Master

Joined: Dec 2006

Posts: 8,837

Likes: 1,028

What is your rear end ratio?

Jan 30, 2007 | 08:09 AM

gyopp

Thread Starter

Burning Brakes

Joined: Feb 2006

Posts: 1,173

Likes: 5

From: Paducah Ky

Yeah, I guess I left out a required detail. I am pretty sure it was 3.08

Jan 30, 2007 | 08:25 AM

Duke94

Le Mans Master

Joined: Mar 2001

Posts: 6,640

Likes: 287

From: Ann Arbor Michigan

Jan 30, 2007 | 03:47 PM

Bob3700

Racer

Joined: Dec 2006

Posts: 416

Likes: 40

From: Swansea IL

Duke - 4 spd please1

Duke,

Could you post the gear numbers for the 4 spd trans.

I have a 2.5 low gear 4 spd and 3:70 Final drive.

Thanks

Bob

Jan 30, 2007 | 04:14 PM

Duke94

Le Mans Master

Joined: Mar 2001

Posts: 6,640

Likes: 287

From: Ann Arbor Michigan

Quote:

Originally Posted by Bob3700

Duke,

Could you post the gear numbers for the 4 spd trans.

I have a 2.5 low gear 4 spd and 3:70 Final drive.

Thanks

Bob

What year? I looked in your profile and you have a fine collection of different years.

Duke

Jan 30, 2007 | 05:31 PM

GTR1999

Tech Contributor

Joined: Aug 1999

Posts: 15,154

Likes: 3,959

From: Connecticut, USA

Duke do you have a reference chart for all years? If so is this avail online? I was looking for the correct gear going from a 308 - 336 with TH400 and 225 15's. The 308 have a white gear but I'm not sure on the # of teeth.
Thanks for the help.
Gary

Jan 30, 2007 | 07:54 PM

Duke94

Le Mans Master

Joined: Mar 2001

Posts: 6,640

Likes: 287

From: Ann Arbor Michigan

Quote:

Originally Posted by GTR1999

I have a CD of the "Corvette Parts Manual" 1953-1982. It's basically the GM Corvette service parts manual scanned on to a CD so everything is there. The part with all the trans speedo gears is 13 pages long for 68-82 models (to much to post here). If you have a specific year, I'll post the correct page(s)

Actually this might be what you need.

Last edited by Duke94; Jan 30, 2007 at 07:58 PM. Reason: Add scans

Corvette Stories

The Best of Corvette for Corvette Enthusiasts

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Joe Kucinski

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Joe Kucinski

8 Coolest Corvette Pace Cars (and Replicas) of All Time

Verdad Gallardo

Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Joe Kucinski

Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Verdad Gallardo

Top 10 Corvettes Coming to Mecum Indy 2026!

Brett Foote

Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Michael S. Palmer

10 Revolutionary 'Corvette Firsts' Most People Don't Know

Joe Kucinski

5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Michael S. Palmer

2027 Corvette vs The World: Every C8 vs Its Closest Competitor

Joe Kucinski

Jan 30, 2007 | 08:48 PM

Bob3700

Racer

Joined: Dec 2006

Posts: 416

Likes: 40

From: Swansea IL

Speedo Gears

Duke,

Am looking for the correct gears for my 1970, 454 with a 4 spd and 3:70 final drive.

Thanks

Bob

Jan 30, 2007 | 10:24 PM

#10

gyopp

Thread Starter

Burning Brakes

Joined: Feb 2006

Posts: 1,173

Likes: 5

From: Paducah Ky

Thanks for the info Duke, that was just what I was looking for even though it is bad news. The chart tells me that I need to change my dirve gear as well as the driven gear.

Jan 31, 2007 | 12:35 AM

#11

Jclgodale3

Le Mans Master

Joined: Nov 2004

Posts: 6,128

Likes: 21

From: North Alabama

I have a 35o with a Borg Warner factory 4 speed with stock 2:72 rear gear. What speedo gear would I need?

Jan 31, 2007 | 06:23 PM

#12

Duke94

Le Mans Master

Joined: Mar 2001

Posts: 6,640

Likes: 287

From: Ann Arbor Michigan

Quote:

Originally Posted by Bob3700

Duke,

Am looking for the correct gears for my 1970, 454 with a 4 spd and 3:70 final drive.

Thanks

Bob

Bob,
This should do it.

Jan 31, 2007 | 06:26 PM

#13

Duke94

Le Mans Master

Joined: Mar 2001

Posts: 6,640

Likes: 287

From: Ann Arbor Michigan

Quote:

Originally Posted by Jclgodale3

I have a 35o with a Borg Warner factory 4 speed with stock 2:72 rear gear. What speedo gear would I need?

Jclgodale3. I don't see anything for a 2.72 axle. See the chart I just posted to Bob. It has the 71' on there as well.

Jan 31, 2007 | 06:41 PM

#14

GTR1999

Tech Contributor

Joined: Aug 1999

Posts: 15,154

Likes: 3,959

From: Connecticut, USA

Duke,
This is for my 72. I don't think they would have changed though but I know the 308 gear is white and it has never been changed. I bought the car in '78 with 40k miles on it.

Jan 31, 2007 | 07:26 PM

#15

Duke94

Le Mans Master

Joined: Mar 2001

Posts: 6,640

Likes: 287

From: Ann Arbor Michigan

Quote:

Originally Posted by GTR1999

Duke,
This is for my 72. I don't think they would have changed though but I know the 308 gear is white and it has never been changed. I bought the car in '78 with 40k miles on it.

Here's the 72' TH-400. Use the page from above (V73) which has the color and number of teeth by part number.

Jan 31, 2007 | 08:11 PM

#16

Jclgodale3

Le Mans Master

Joined: Nov 2004

Posts: 6,128

Likes: 21

From: North Alabama

Quote:

Originally Posted by Duke94

Jclgodale3. I don't see anything for a 2.72 axle. See the chart I just posted to Bob. It has the 71' on there as well.

Sorry...this is for the 1981 not the 71

Feb 1, 2007 | 09:28 AM

#17

Duke94

Le Mans Master

Joined: Mar 2001

Posts: 6,640

Likes: 287

From: Ann Arbor Michigan

Quote:

Originally Posted by Jclgodale3

Sorry...this is for the 1981 not the 71

Here's 80 and 81'. Not many choices.

Feb 1, 2007 | 10:32 AM

#18

gyopp

Thread Starter

Burning Brakes

Joined: Feb 2006

Posts: 1,173

Likes: 5

From: Paducah Ky

Hey Duke, betcha never new you were so popular before this thread.

Seriously, that is a great help. I didn't know that published info on this existed.

Feb 1, 2007 | 11:35 AM

#19

Duke94

Le Mans Master

Joined: Mar 2001

Posts: 6,640

Likes: 287

From: Ann Arbor Michigan

Quote:

Originally Posted by gyopp

Hey Duke, betcha never new you were so popular before this thread.

Seriously, that is a great help. I didn't know that published info on this existed.

For sure. I'll probably end up posting all 13 pages sooner or later. Just glad I can add something to this Forum.

Mar 1, 2007 | 09:37 PM

#20

jtp75_4spd

Intermediate

Joined: Feb 2007

Posts: 36

Likes: 0

From: Yardley PA

Speedo gear info for 75 Borg Warner 4 spd L48???

Also another question 75 shop manual says 75 4 spd was a saginaw, is that the same as a borg warner???

75 4 spd (L48, at least originally was now engine is far from that), rear gear is supposd to be stock so 1975 brochure says either 3.08 or 3.36 (hopefully 3.36)
Car is in upsate ny storage (at least hope it still is) til snow melts,
but may have to change out speedo gear. this spring....my 75 assy manual is back ordered....could u show me the 1975 Borg warner 4 spd speedo gear info from your manual??????
thnx very much!!!!!

Reply Share

First
Prev
1 / 2
Next
Last

Forum Jump