Need taller gears for my 62 Posi

[RustyCrank]

I have an original 3.90 Posi in my 62 and need to know if the lower ring and pinion gears will work with my posi unit. There were 2 different ratios offered in that year and it looks like non posi came in either 3.30(?) or 3.90 and cant imagine the carriers being too different as they both fit the same housing. I know the old Ford 9" route is an option, but just spent a pile of dough on the wife's 56 Nomad makeover and need to keep this as econo as possible....

Anyone done this swap?

Attached is a pic of the housing

[Captainfab]

What you have there is a 12 bolt truck rear differential. That should not be original to a '62 truck. If the backing plates are pressed on, then it is possible that your truck is a late production '62. The '63 12 bolts had the pressed on backing plates. On the 12 bolts the 4 series carrier works with 3.73 and lower gears (higher numerically) and the 3 series carrier works with 3.42 gears and higher gears (lower numerically).

[raycow]

I agree with the Captain. A stock 62 rear would have a round cover plate and a drop-out center section.

You are fortunate that a PO did the 12 bolt swap, because the gear selection is better and it is much easier to find a posi for it. I don't think anyone is making new posi units for the 62-earlier rear, and original ones are extremely scarce.

Ray

[1Bad62Pro/Street]

As far as a Ford 9 inch swap. I have done this swap.
I have the original 3.70 gear ratio. Good road gear.
Been wanting a 4.10 or 4.11 to give her a little more umph.
I believe CaptainFab is correct on the posi rear end.
Anyhoot... If you wanna do the 9 inch swap just hollar at me.
I'll tell you what you need to do. Check out my build thread as well.
I am very partial to 9 inch hineys. We have a stash of the kinda rare more sought
after ones.
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[RustyCrank]

Thanks guys for the replies and I should have attached the other view which shows this is a 10 bolt rear, and pretty sure it's the original for '62 - at least the two I have. All the mounts and panhard brakets are stone stock original too. Having said that, I'm finding that I apparently have a couple rare rear ends but both were from different trucks from different sellers here in the NW. Let me know if this helps?

[GMR-PERFORMANCE]

Not the best pic but you can see that what you have is not what is stock. I know that many have said the stock unit is not very strong. Myself would disagree with that. I have made too many 1/4 pass's to count with the stock set up with ET'S in the mid 11 second range best to date is a 11.10 pass. I run the snot out of that truck and that rear end has taken everything I can throw at it. I run a 27 inch tall slick that is 11 inches wide with a 5500 RPM launch.. Those tires hook like a monster. If I break it a 9 inch with 35 splines will go in it. But until then the stocker stays where it is at.

[raycow]

Originally Posted by RustyCrank

Thanks guys for the replies and I should have attached the other view which shows this is a 10 bolt rear, and pretty sure it's the original for '62 - at least the two I have. All the mounts and panhard brakets are stone stock original too.

Aha! That view makes all the difference. What you have there is a Dana 44 and it is likely out of a 60-62 GMC 1/2 ton. It is the only other rear that will bolt up to your trailing arms without having to move the perches. When you can find one of those it is a very good way to get better gearing and posi in a 60-62 Chevy. Gear and other parts availabilty is good. I looked for one of those for my 60 but finally gave up because they are so scarce.


Ray

[blackedoutharley]

And now that you have the info you need allow me to hijack the thread completely...

While you're getting pictures of the front end for Capt. Fab can you also get a bigger picture of the 3rd brake light with application info as well as the rear bumper?

Please?

[Captainfab]

I forgot about clicking on your avatar pic....that brings up a bigger pic. I thought about making a similar grill and headlights for my first '63 many years ago, but never got that far. What is the application for those headlights?

[jbgroby]

HI,
I have the same rear end a DANA 44 and switched from 3.90 to 3.23 see album link. bought everything from Precision Gear.

http://rides.webshots.com/album/570438270cjSEvE

Jake

[GMR-PERFORMANCE]

Hope no one minds if I hijack the thread a bit more...

The talk about brakes makes me think about the last summer before I tore the truck down for the frame off..

I was at a local car show/ parts swap meet. There was a guy there in a Z06 vette, a big sign in the front of the car at the show listing all the super duper go fast parts yada yada.. Long story short we leave at the same time and we know that we want to run them!!! Well we get the chance and in front of the vette is a 75 econline van going maybe 35 in a 65, so all clear the guy in the vette drops the hammer tires haze and the rear slides out and he is going around this van. I am right on his rear end and hammer the throttle well I almost park the truck in the back of the vette. I swear this guys eyes are the size of cue balls No chit.. I toy with him back on and off the gas and he sees that if he moves over I am going to get around so he does and I go rolling by .. little small block at 7600 rpm ( what a sound) so I get by and then go to stop for my turn...... AHHHH yes four wheel drum brakes.. I am two footing the pedal , with my hands under the wheel trying to push harder... I go smoking past my turn.. ... I get the old girl stopped and the front shoes are smoking so bad it looks like the truck is on fire!!! ... Was able to limp it home to find that all four shoes had shed the lining.. and made a big mess inside the drums..


SO I am looking forward to the new disc brakes.. Hope you guys enjoyed the side bar humor.

[RustyCrank]

I had so much fun changing everything I could get a plasma cutter or mig welder to reach on this truck, it's getting hard to remember everything...but here's a brief list of the majors;

88 Chev Celebrity headlights -the top view line angles followed the curve of the front end perfectly so they could be aligned. I had to cut a pocket into the core support but not too radical.

1/8 X 1" flat bar v-cut in the middle to follow curved front after headlights were installed. Made the combs first and got the shape I wanted then made the bars. The outer ends attach with screws so I can get to the headlights for servicing. I originally planned to do in aluminum, but later decided on steel for cost and the mono paint scheme

88 Acura door handles - once again they have a curve that fits the door perfect. Most effort then was making a fulcrum linkage to activate the stock inner door latch...then a trick to get the door locks working but thats a whole story in itself....

86 Blazer mirrors - I really liked how the shape followed the cab lines. legnthened the posts and built the mounting bracket inside the door, frenched in some tubing with a rubber gromet in the bottom.

72 C-10 tailgate sacrificed its ends with support arms to be cut into the 62 tailgate before the custom rolled panel was welded in. I replaced the latch springs with lighter ones on the ends so I could use a tailgate latch from a 66 El Camino mounted to the inside of the tail gate. The tonneau cover has a hidden release so you can get into it after rolling up.

72 Sport bumper with 66 Lincoln backup lights frenched in, and notched for the 4" exhaust tips (I stole that look off my G37 daily driver) The trailer hitch reciever is hidden behind the license plate that flips up when needed for boat hauling duty.

72 steel bed floor shortened 20'' to fit the short box. It was amazing how all the bolt holes lined up!

A freind gave me a 70 Buick Riviera so it got to donate power window regulators that I siamezed into the stock regulators. The steering column was also used.

92 Silverado bench and the front mounting holes lined right up to stock!

86 IROC Z28 instrument cluster modified to fit the stock 62 housing. I used the whole wiring harness from the Z28 so the VSS in the speedo was used with the FI computor.

[GMR-PERFORMANCE]

pic of the thrird light please!!!! I have been struggling with this on my own truck as even with LED tail lights I have a bad feeling about a grey hair trying to park there caddie into the box of my truck

[RustyCrank]

Sorry, had to run out to the garage and snap a pic for you. Your fear is exactly what motivated me!! Way too much work to get bumped.

BTW, I have a camera mounted above the license plate pointed right at the hitch ball for backing up to the trailer - did that after a few "hitching by feel" incidents required repainting the bumper.

Let me know if this helps or need a better shot

[GMR-PERFORMANCE]

That looks great how a rear shot as well.. What year is that light off make model maybe even a GM prt number

[Captainfab]

Thanks for the info

[RustyCrank]

Originally Posted by GMR-PERFORMANCE

That looks great how a rear shot as well.. What year is that light off make model maybe even a GM prt number

I'll get another rear shot this weekend in the daylight if I can, but found this source for you to get a new one. Wrecking yard units are usually pretty weathered.

http://www.1aauto.com/1A/TailLights/...tm_content=LTL

[bama63]

nice ride and great skillz