Chevy Impala SS Forum banner

1 - 13 of 13 Posts

·
Premium Member
Joined
·
15,727 Posts
Discussion Starter #1
So, anybody happen to have a stock length driveshaft with 1350 u-joints lying around that I can buy (or ideally borrow for a while)? My PST carbon fiber driveshaft that I bought in the forum group purchase in '07 and finally installed last year twisted itself apart at the joint up by the tranny yesterday. Not sure what happened but I can guaranty it wasn't HP-related...Note: stock u-joints are 1330 series, I have 1350 slip yoke and pinion installed, so a stock takeoff drive shaft won't work. Thanks.
 

·
Premium Member
Joined
·
20,281 Posts
.......My PST carbon fiber driveshaft that I bought in the forum group purchase in '07 and finally installed last year twisted itself apart at the joint up by the tranny yesterday. Not sure what happened......
Erik.....please post up when/if you find out what happened.

GLW purchase.

KW
 

·
Premium Member
Joined
·
15,727 Posts
Discussion Starter #4
Thanks to a great suggestion from Gerry (and also Paul Roswell) and the generosity of Mike Kender, I have a solution that will get me mobile in the short term - conversion u-joint and a borrowed stock drive shaft. I'll be sending the PST driveshaft back to them and I'll update when I have more info.
 

·
Premium Member
Joined
·
781 Posts
Temp fix.

Spicer makes a 1350/1310 u-joint if you need a temporary fix. I had to run one for a while in my '68 behind a 502 and it stood up to full throttle shifts that even a "built" LT1 can't match for torque. Give me a minute and I'll grab a pn..........

Jim
 

·
Premium Member
Joined
·
15,727 Posts
Discussion Starter #6
Thanks. That's what I'm doing (1350/1330 u-joint).
 

·
Premium Member
Joined
·
781 Posts

·
Premium Member
Joined
·
4,511 Posts
The stock impala is 3R, NOT 1330 or 1310

A 1350-1310 or 1350-1330 conversion joint will not work

The pre 71ish Chev used the 1.062 cup with external clips

Newer than that, they adopted the , common to Olds-Pont-Buick , 1.125 cup internal clips (typically a 3R)

1350 to GM 3R Series Combination Neapco Greaseable Universal Joint
 

·
Premium Member
Joined
·
4,511 Posts

·
Premium Member
Joined
·
15,727 Posts
Discussion Starter #10
Damn. Will temporarily using 1330 on the driveshaft side damage anything? I have the Moog 448 which is 1330/1350 but it hasn't been installed yet. I read your PM but assumed 3R and 1330 were two ways of referring to the same thing. I shouldn't have done that. When we did the group purchase years ago, the choices offered were "stock" 1330 u-joints or upgraded 1350 u-joints which required a replacement pinion. My understanding at the time and from re-reading that thread was that the stock driveshaft was 1330. In stock configuration, are both the driveshaft and the pinion 3R or is the pinion 1330?
 

·
Premium Member
Joined
·
4,511 Posts
1330 is a 1.062 ( 1 -1/16) external clip ( clips in yoke at ends of cups )

3R is a 1.125 (1- 1/8 ) internal clip ( clips on cup inner side of yoke )

From description of a Nepco 1330 to 3R conversion joint ,

1330 to GM 3R Series Combination Neapco Greaseable Universal Joint. This is a very popular and handy u-joint when connecting mismatched driveline components.

Use this to connect 1330 series components to GM 3R series components.

Neapco GREASEABLE U-Joint
Grease Fitting in body of u-joint
Requires regular maintenance intervals for long life
1330 series measures
Dimension B = 3.625 inches wide
Dimension D = 2 bearing caps are 1.0625 inch diameter
outside snap rings
GM 3R series measures
Dimension A = 3.625 inches wide
Dimension C = 2 bearing caps are 1.125 inch diameter with inside "C" Clips to lock the cap in place.
inside "C" Clips
The span between the yoke inner surfaces where the "C" Clips lock in is 2.562 inches


Can't see you retaining a 1330 in an Impala stock driveshaft .
 

·
Premium Member
Joined
·
4,511 Posts
To add, unless I am wrong and apologize if I am, I am very sure the production driveshaft is 3R everywhere.

It seems the aftermarket , especially with aluminum yokes , likes the outter clips style u-joints.
Possibly the smaller u-joint option was a 1330 front set up and a 1330-3R rear
Front would be their 1330 slip yoke and 1330 weld yoke
Rear would be 1330 weld yoke and a conversion joint to fit the 3R diff yoke

The above is a guess on my part
 

·
Premium Member
Joined
·
15,727 Posts
Discussion Starter #13
Thanks Gerry.
 
1 - 13 of 13 Posts
Top