Enjoy 5% OFF at VEVOR Canada! and Support Canadian Poncho at the Same Time!
Members Login
Username 
 
Password 
    Remember Me  
Canadian Poncho Homepage -> Canadian Poncho -> The Library -> nomenclature
Post Info TOPIC: nomenclature
t-bucket


Member

Status: Offline
Posts: 15
Date:
nomenclature
Permalink  

is there any numbers in the VIN that would tell what the differential ratio is?? this would be much easier than pulling the diff out to see

__________________
when it's all said and done more will have been said than done !!
4SPEED427


A Poncho Legend!

Status: Offline
Posts: 50201
Date:
Permalink  

First, welcome here!

No, sorry there isn't. What year and vehicle are you dealing with?


__________________

1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
Nov 18 to Dec 2 Black Friday UP TO 50% OFF Plus Huge Coupons
Nov 18 to Dec 2 Black Friday UP TO 50% OFF Plus Huge Coupons
t-bucket


Member

Status: Offline
Posts: 15
Date:
Permalink  

I just put a 350 in my 55 pontiac I have 355 gears but my driveshaft won't fit into the 350 tranny sploines are different I guess they changed u-joint size in 56. So I'm looking for a new diff to get a lower gear ratio and a larger u-joint so I don't have to get a custom driveshaft made up thought it would be nice to know the numbers before I tore it out

__________________
when it's all said and done more will have been said than done !!
4SPEED427


A Poncho Legend!

Status: Offline
Posts: 50201
Date:
Permalink  

If you don't want to change ratio there should be a yoke available to fit your driveshaft and the TH350 AND a ujoint to fit all that!

Is the problem with your front yoke that it's coarse spline? I ran into that on a 63 Acadian with a powerglide. It has a coarse spline output shaft on it. A simple yoke swap solved the problem.


__________________

1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
65wagon


Poncho Master!

Status: Offline
Posts: 2115
Date:
Permalink  

wow i thaght i was the night owl



__________________
4SPEED427


A Poncho Legend!

Status: Offline
Posts: 50201
Date:
Permalink  

Me or T-bucket?

__________________

1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
t-bucket


Member

Status: Offline
Posts: 15
Date:
Permalink  

I have a yoke to fit the tranny but the u-joint that is on my driveshaft is too small for the yoke according to lordco there is no u-joint to cross over the small to the large Also I have a chev driveshaft with the right yoke but the u-joint won't fit the diff. hence changing the diff may solve my problems

__________________
when it's all said and done more will have been said than done !!
Nov 18 to Dec 2 Black Friday UP TO 50% OFF Plus Huge Coupons
Nov 18 to Dec 2 Black Friday UP TO 50% OFF Plus Huge Coupons
4SPEED427


A Poncho Legend!

Status: Offline
Posts: 50201
Date:
Permalink  

So the shaft you are wanting to use is the original 55 Pontiac shaft?

And this a Canadian Pontiac we are talking here?

__________________

1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
Led Zeppelin


Addicted!

Status: Offline
Posts: 124
Date:
Permalink  



Slowly rotate one tire exactly one revolution with your hand while watching the pinion yoke on the axle.
Count the number of times the pinion yoke makes a revolution.
The amount of times the pinion yoke turns represents your gear ratio.



__________________

1979 Pinto
4SPEED427


A Poncho Legend!

Status: Offline
Posts: 50201
Date:
Permalink  

I should tell you why I'm asking! I'm a parts man so I would like to see what I can find tomorrow for info.

__________________

1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
t-bucket


Member

Status: Offline
Posts: 15
Date:
Permalink  

yes it is a canadian pontiac came with a 261and a 2 speed powerglide
I'm going to walk through my buddys field of hulks tomorrow to see what I can find
my oold drive shaft uses a 507 with 1 inch caps and the new drivceshaft I have uses 534G u-joints

__________________
when it's all said and done more will have been said than done !!
427carl


A Poncho Legend!

Status: Offline
Posts: 35601
Date:
Permalink  

t-bucket wrote:

I just put a 350 in my 55 pontiac I have 355 gears but my driveshaft won't fit into the 350 tranny sploines are different I guess they changed u-joint size in 56. So I'm looking for a new diff to get a lower gear ratio and a larger u-joint so I don't have to get a custom driveshaft made up thought it would be nice to know the numbers before I tore it out

         Welcome to the site     glad your getting some better gears 

         4:56's are really cool for around town...



__________________

 
Nov 18 to Dec 2 Black Friday UP TO 50% OFF Plus Huge Coupons
Nov 18 to Dec 2 Black Friday UP TO 50% OFF Plus Huge Coupons
dualquadpete


Canadian Poncho Superstar!

Status: Offline
Posts: 5682
Date:
Permalink  

There are special U/joints that have 2 diff. end caps available. had to use them on 52 with Tremec 5spd to stock 86 ?? Monty d/shaft. Think I used a GM/Ford combo to fit the tremec frt. yoke but should be something available for rear pinion set up too?????

__________________

Some times I wake up GRUMPY, but today I let her sleep in    !!!!!!!! BLACKSTOCK Ont.
4SPEED427


A Poncho Legend!

Status: Offline
Posts: 50201
Date:
Permalink  

I looked for a combo joint Pete but no luck. His parts guy is right from what I see. Nothing.

A lot cheaper to change shafts than gears though.

__________________

1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
dualquadpete


Canadian Poncho Superstar!

Status: Offline
Posts: 5682
Date:
Permalink  

Still trying to figure out what T-Bucket is doing here??? Asks how to tell what ratio is in car,but then says he's got 3:55's or are they the replacement gears & he doesn't know whats in there??? Way back when, I had a 55 chevy & swapped out a few "pots" for diff ratio's but never had a u/joint problem, just trying to keep a rear end together,went to Olds rear end & that solved the "exploding" gears. Is it possible that the "new" pot has a diff pinion yoke on it for another application & thats why the u/joint won't fit??? The combo U/joint I got from NAPA wasn't even listed in their book, Miles,picked it off the shelf, but couldn't find it "listed" anywhere other than the pricing[Dam]

__________________

Some times I wake up GRUMPY, but today I let her sleep in    !!!!!!!! BLACKSTOCK Ont.
t-bucket


Member

Status: Offline
Posts: 15
Date:
Permalink  

thanks carl and others for the input
we solved the problem today and carl you were right it was as simple as a yoke swap.
Ii was trying to fit a yoke from a S-10 onto the end of my 55 shaft and they have different u-joints
once we got the right chevy car yoke everything fell into place

the reason I was interested in gear ratios is because I wanted taller gears
because I went from a six cly to a v-8. usually the 6cly gears are around 4 to 1 and those aren't what I wanted for cruising
I had several cars to choose from and pulling each one apart to see what the ratio was seamed like a lot of work

any way like I said all problems are solved for now motor tranny and difff all mounted

thanks

__________________
when it's all said and done more will have been said than done !!
Stephenzone


Canadian Poncho Superstar!

Status: Offline
Posts: 4771
Date:
Permalink  

welcome and any pics of the 55

__________________

sTevE

55 GMC, 70 Pontiac 2+2 rag
Nov 18 to Dec 2 Black Friday UP TO 50% OFF Plus Huge Coupons
Nov 18 to Dec 2 Black Friday UP TO 50% OFF Plus Huge Coupons
4SPEED427


A Poncho Legend!

Status: Offline
Posts: 50201
Date:
Permalink  

Glad it all worked out for you.

__________________

1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
t-bucket


Member

Status: Offline
Posts: 15
Date:
Permalink  

I'll post some pics when I get a chance ( and some help) I'm not very good with this computer thing

__________________
when it's all said and done more will have been said than done !!
Page 1 of 1  sorted by
 
Quick Reply

Please log in to post quick replies.
Canadian Poncho Homepage -> Canadian Poncho -> The Library -> nomenclature
Tweet this page Post to Digg Post to Del.icio.us
.
Support Canadian Poncho!
Select Amount:
<
.
.
.