Auto-4speed conversion & U joints..80 model
Thread Starter
Le Mans Master
Joined: Jun 2007
Posts: 7,666
Likes: 1
From: Where it's always hot as Hell-South Louisiana.
St. Jude Donor '07-'08-'09-'10-'11-'12-'13
Auto-4speed conversion & U joints..80 model
Have read , and can not find an article about the difference between an automatic driveshaft vs. a 4 speed driveshaft (80 model) and their respective U joints. I am assuming they are different sized .
So I am currently acquiring parts for an 80 model automatic to 4 speed conversion. Super T10 trans, yoke and driveshaft are in my shop...
Seem to remember that a special U joint can be purchased for the rear whereas one side is sized for the driveshaft, the other side is sized for the rearend coupler. Thats right, a U joint with 2 different size cups...
Anyone know? (maybe I dreamed this?)
The driveshaft currently in the car is an automatic one, the 4 speed driveshaft has this numbered tag attached:
14014606XD
H E L P !
So I am currently acquiring parts for an 80 model automatic to 4 speed conversion. Super T10 trans, yoke and driveshaft are in my shop...
Seem to remember that a special U joint can be purchased for the rear whereas one side is sized for the driveshaft, the other side is sized for the rearend coupler. Thats right, a U joint with 2 different size cups...
Anyone know? (maybe I dreamed this?)
The driveshaft currently in the car is an automatic one, the 4 speed driveshaft has this numbered tag attached:
14014606XD
H E L P !
Burning Brakes
Joined: Apr 2007
Posts: 1,039
Likes: 62
From: Kona Hawaii
Try Denny's
Try these guys http://www.dennysdriveshaft.com/c29_corvette.html I got my 1330 spicer ujoints from them.Good luck
Thread Starter
Le Mans Master
Joined: Jun 2007
Posts: 7,666
Likes: 1
From: Where it's always hot as Hell-South Louisiana.
St. Jude Donor '07-'08-'09-'10-'11-'12-'13
Thought I could draw from someones experience ? thanks for anyone's response.
Burning Brakes
Joined: Oct 2011
Posts: 956
Likes: 86
From: McDonough Georgia
The AIM won't really help here. The auto tranny has a smaller diameter U joint than the manual.
To use the auto driveshaft with a super T10, like I am, you have to get the universal from summit racing.
That is the part number needed. I'll stop by and try to get it today and post.
To use the auto driveshaft with a super T10, like I am, you have to get the universal from summit racing.
That is the part number needed. I'll stop by and try to get it today and post.
Thread Starter
Le Mans Master
Joined: Jun 2007
Posts: 7,666
Likes: 1
From: Where it's always hot as Hell-South Louisiana.
St. Jude Donor '07-'08-'09-'10-'11-'12-'13
Try these guys http://www.dennysdriveshaft.com/c29_corvette.html I got my 1330 spicer ujoints from them.Good luck
Y E P !
I think thats what I need..... 1310 to 1330 .... will not know for sure till I start the project, but this smells like the one.
Anyone have more / better/ accurate info? Please and Thank You .
Thread Starter
Le Mans Master
Joined: Jun 2007
Posts: 7,666
Likes: 1
From: Where it's always hot as Hell-South Louisiana.
St. Jude Donor '07-'08-'09-'10-'11-'12-'13
The AIM won't really help here. The auto tranny has a smaller diameter U joint than the manual.
To use the auto driveshaft with a super T10, like I am, you have to get the universal from summit racing.
That is the part number needed. I'll stop by and try to get it today and post.
To use the auto driveshaft with a super T10, like I am, you have to get the universal from summit racing.
That is the part number needed. I'll stop by and try to get it today and post.
So, will I need said U joint for the rearend yoke?
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Burning Brakes
Joined: Oct 2011
Posts: 956
Likes: 86
From: McDonough Georgia
If you have the 4 speed driveshaft you won't have a problem.
The 1310-1330 U joint is for a T10 to automatic driveshaft.
The super duper heavy duty version at Summit is 18.95, part number PCN 253.
The 1310-1330 U joint is for a T10 to automatic driveshaft.
The super duper heavy duty version at Summit is 18.95, part number PCN 253.
Race Director
Joined: Nov 2002
Posts: 12,142
Likes: 54
From: Taylor Michigan
There conversion joints, and the one you may require would be a 1270-1310, my books are not with me...however I think its correct ..we sold several for diifferent applications and I know there out there...the number above is one of the most popular and can be interchanged if you find a smart counterman....
Melting Slicks
Joined: Aug 2004
Posts: 2,906
Likes: 228
From: Oakbank Manitoba
Here are some part numbers for the conversion U Joint you are looking for (1310/1330):
Precision Super Joint #253 (Summit Racing PCN-253)
Brute Force #1-0134BF
Neapco #1-0134
Performance Dynamics Dura-Lubed #2-0344
Spicer #5-134X
You are correct that you will need a conversion U joint. The 1980 diff driveshaft yoke is a 1310. Both automatic and manual transmission cars came with the same size diff yoke. The transmission yoke for the manual equipped cars had the bigger 1330 U joint.
You can verify that the 4-speed driveshaft has 1330 U joints by measuring the end cap distance (end to end). It should be 3.6250" (3 5/8"). If it was a 1310 U joint then the end cap distance would be 3.2190" (3 7/32").
Precision Super Joint #253 (Summit Racing PCN-253)
Brute Force #1-0134BF
Neapco #1-0134
Performance Dynamics Dura-Lubed #2-0344
Spicer #5-134X
You are correct that you will need a conversion U joint. The 1980 diff driveshaft yoke is a 1310. Both automatic and manual transmission cars came with the same size diff yoke. The transmission yoke for the manual equipped cars had the bigger 1330 U joint.
You can verify that the 4-speed driveshaft has 1330 U joints by measuring the end cap distance (end to end). It should be 3.6250" (3 5/8"). If it was a 1310 U joint then the end cap distance would be 3.2190" (3 7/32").
Last edited by KENS80V; Oct 25, 2011 at 09:54 PM.
Thread Starter
Le Mans Master
Joined: Jun 2007
Posts: 7,666
Likes: 1
From: Where it's always hot as Hell-South Louisiana.
St. Jude Donor '07-'08-'09-'10-'11-'12-'13
You are correct that you will need a conversion U joint. The 1980 diff driveshaft yoke is a 1310. Both automatic and manual transmission cars came with the same size diff yoke. The transmission yoke for the manual equipped cars had the bigger 1330 U joint.
You can verify that the 4-speed driveshaft has 1330 U joints by measuring the end cap distance (end to end). It should be 3.6250" (3 5/8"). If it was a 1310 U joint then the end cap distance would be 3.2190" (3 7/32").
My 4 speed shaft has 1 1310 U joint on one end, the other end has a 1330 joint...
I am assuming that the differential yoke is a 1310 ( 3 7/32 inch end cap -end cap) by reading your above information. I am not by my car to measure the existing diff. yoke.
If that is correct, then I will only need 1-1310 joint and 1-1330 joint....And will not need the special "conversion" joint.
Is that what you get ?
Thanks.
Drifting
Joined: Jul 1999
Posts: 1,542
Likes: 43
From: Plano TX
I used a take apart yoke at the trans on my DN 5 speed conversion. I then had the local driveline should but a new flange on the trans end of the drive shaft. This way I can get common joints if it fails on the road.
Melting Slicks
Joined: Aug 2004
Posts: 2,906
Likes: 228
From: Oakbank Manitoba
The 4-speed driveshaft you bought is from a 80/81 car.
Here are the part numbers for the U joints. I highly recommend SPICER
1310 (rear) #SPL22-1X
1330 (front) #SPL25-1X
You are correct saying the conversion U joint is not needed.
Here are the part numbers for the U joints. I highly recommend SPICER
1310 (rear) #SPL22-1X
1330 (front) #SPL25-1X
You are correct saying the conversion U joint is not needed.
Thread Starter
Le Mans Master
Joined: Jun 2007
Posts: 7,666
Likes: 1
From: Where it's always hot as Hell-South Louisiana.
St. Jude Donor '07-'08-'09-'10-'11-'12-'13
I will indeed buy the ones you recommend.
