I was just wondering if there was any way to change the gears in my rearend from the 4.22 to around a 3.55 or something around there. Is the only way to change the whole rearend with something else? Is there any other rearends that interchange with mine. Any info would be a help.
Your 39 look like a canadian one, if yes you should run (if I'm not wrong) on a close drive line. You may consider to swap with a slight modification with a PG 53-54 rear end. I know (not sure) they are not the same lenght, but it's easy to modify.
A PG 53-54 rear end is a 3.55 ratio, enough to run to 65 mph.
Fitz.
__________________
www.FitzbackGarage.com Look for Easy Steering in your vintage Poncho, Look for the EasyDrive Power Steering System in the web site
Thanks for the info 427carl. But i dont have a chevy rearend in my car. It is an open drive rearend. Does anyone know what other cars may have a rearend the same as mine but with different gears thast may be interchangeable? I am sure this can't just be a Canadian Pontiac rearend and nothing else at all???
My car is Canadian built. I live in Vancouver, B.C. Canada. All the Canadian built 39 Pontiacs from my understanding have a open drive rearend with coil spring suspension, not leaf springs. Someone correct me if i am wrong. Here are some pictures, sorry not the greatest, i will try and get better ones.
TO PUT 3.50 GEARS IN A 39 I USED A 53 53 POWERGLIDE RING AND PINION AND TOOK THE SPLINED PART OF THE 53 54 DRIVE SHAFT AND PUT IT IN THE 39 THEY WORKED GREAT.
Iam pretty sure that this is different than a chevy rearend but not too sure. If there is someone that can tell me for sure that would be appreciated. Thanks for the help 427carl
I'm going thru my gm part book it covers from 37 to 51 and and interesting thing that come up is that in 39 they are listing a 25,26 and a 28 model that is imported. yours is also listed as a chieftain six sedan (25-19). all the other listing chev, olds buick and chev/maple leag/gmc trucks nothing imported.
the canadian ones list the engine for 39 as 6 Valve in Head and the imported ones list a 6 or 8 "L" Head. the Valve in Head ran from 37 to 40 and the "L" runs from 29-51 (book only goes to 51) still looking for other interesting trivia
My car is Canadian built. I live in Vancouver, B.C. Canada. All the Canadian built 39 Pontiacs from my understanding have a open drive rearend with coil spring suspension, not leaf springs. Someone correct me if i am wrong. Here are some pictures, sorry not the greatest, i will try and get better ones.
If it looks like a Canadian built, and says its a Canadian built, (by tag) then its got a CHEVROLET 37-54 rear end.....
-- Edited by 427carl on Monday 25th of October 2010 07:35:20 PM
My car is Canadian built. I live in Vancouver, B.C. Canada. All the Canadian built 39 Pontiacs from my understanding have a open drive rearend with coil spring suspension, not leaf springs. Someone correct me if i am wrong. Here are some pictures, sorry not the greatest, i will try and get better ones.
If it looks like a Canadian built, and says its a Canadian built, (by tag) then its got a CHEVROLET 37-54 rear end.....
-- Edited by 427carl on Monday 25th of October 2010 07:35:20 PM
I am confused. Isnt the chevy rearend closed drive and leaf spring. Does this mean my gears are the same inside??
same part number for drums (6 bolt) for chev/pontiac and olds. looks like the US used 5 bolt drums, interesting 39 is the only year back then pontiac (canada) used coils. i'm full of ufi today
I'm probably not helping, but when you say closed drive are you refering to a torque tube design with no u-joint on the rearend. isn't yours a torque tube? from what i can tell pontiac used the same rearend for a while but only had coil springs for one year.
Some years ago I rebuilt a 39 canadian Pontiac, I don't remember the series #, but it has a valve in head engine, straight axle in front and closed drive line. Anyway the drive train was like a chevy (with slight modification to the engine), with leaf spring in the rear, no coil
Fitz.
__________________
www.FitzbackGarage.com Look for Easy Steering in your vintage Poncho, Look for the EasyDrive Power Steering System in the web site
I'm probably not helping, but when you say closed drive are you refering to a torque tube design with no u-joint on the rearend. isn't yours a torque tube? from what i can tell pontiac used the same rearend for a while but only had coil springs for one year.
Mine is a open drive, with coil spring front and rear suspension. Yes closed i mean torque tube, mine is not. It is 6 lug bolt pattern. Seems like mine is some oddball creation??
Some years ago I rebuilt a 39 canadian Pontiac, I don't remember the series #, but it has a valve in head engine, straight axle in front and closed drive line. Anyway the drive train was like a chevy (with slight modification to the engine), with leaf spring in the rear, no coil
Fitz.
The imported pontiacs of 39 had leafs according to my GM parts book
Some years ago I rebuilt a 39 canadian Pontiac, I don't remember the series #, but it has a valve in head engine, straight axle in front and closed drive line. Anyway the drive train was like a chevy (with slight modification to the engine), with leaf spring in the rear, no coil
Fitz.
The imported pontiacs of 39 had leafs according to my GM parts book
with overhead engine?
Fitz.
__________________
www.FitzbackGarage.com Look for Easy Steering in your vintage Poncho, Look for the EasyDrive Power Steering System in the web site
.