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64 Vette….Rebuild 2.0
- Thread starter 76zimmer
- Start date
You've got all the toys don't you?
Nope still have a couple on the list to get yet....ha ha.
Ya know, I'm still in reasonable good health for my age, and have my finances in good shape, so I'm going to have fun while I can. I'm still saving like a fool too though.
Ya know, I'm still in reasonable good health for my age, and have my finances in good shape, so I'm going to have fun while I can. I'm still saving like a fool too though.
Can't say as I blame you.
do you have a Limited slip in the diff? If so you may need to replace that, in 63 and some of 64 a Eaton limited slip was used and there are no rebuild parts around for them any more
79rustyk10
3/4 ton status
Not very often you see a HD with an 80 inch evolution anymore... Nice bike, I gotta get one of those sometime.
And Ive always wondered how those Vettes handled with the leaf springs mounted that way?
another thing, When are you gonna adopt me?
And Ive always wondered how those Vettes handled with the leaf springs mounted that way?
another thing, When are you gonna adopt me?
The original diff (64 casting) has the old Eaton style in it, and I will be replacing it also. I have the housing/cover/pinion yoke/and side yokes all going to the strippers today. It will be rebuilt with a Detroit Truetrac, and 3.36's, by my local rearend guy.
Update, evidently the setup would be custom now, as the original shims used aren't available, and would have to be mill ground down to thickness needed for proper backspacing. So I may not use this Diff at all. Looking into other options now $$$$
The diff in the pic is a 69 unit, and has the more common 65 and up Eaton posi clutch pak in it. It will be getting sent to NJ to a specialist, that does a lot of hand work, by polishing the case, and carrier to get rid of stress risers. Then it will get some machine work with a machined cap installed with bigger bolts, a new hardened precision ground cross-shaft, new gears, bearings, etc., heat treated 10-17 spider gears, and precision ground shims. Not sure yet if I'll upgrade the side yoke axles, to some 30 spline Kick Ass axles.
Also ARP ring gear bolts, and a pinion spacer, to replace the crush sleeve. This allows for precise, repeatable pinion set up. Yeah that should chew through a grand in a hurry.
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Yeah the later EVO'S are good engines. I've put 20K on mine in the last 4 years, and only change oil, and maybe plugs a couple times just because. I do the scheduled maintenance by the Service manual, other than that, I'm real happy with it.
I rode a 75 Iron head sporty for 18 years before getting this bike, and wish I would have made it a priority about 15 years ago. I really like to ride it more than a 100 miles at a time. Back and forth to work just don't do much for me.
The Vette handles really good I think, I autocrossed it years ago, (low speed less than 100mph) with that stock 7 leaf spring in it, and some 520lb springs up front, and it did REAL good for an old beater (before the rebuild) I was running lap times as fast as a new 86 at the time. I had hp on him, but he definitely had handling on me, and anti lock brakes and tires too.
Funnernhell.
And about that adoption thing......are you a redheaded child?
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79rustyk10
3/4 ton status
well, it used to be kinda reddish, but it just brown now.
Which shims are not available? I know this summer i pulled a few diffs out of 64 and 63's and my boss had no issues rebuilding them with out custom shims
According to the source I have lined up to do the custom work, the 63-64 housings are slightly narrower than the 65+. Therefore the bearing side shims need to be reduced thickness if replacement is necessary to achieve proper backlash. If I was going to replace the carrier, and ring and pinion, this seems logical that the original shims couldn't be reused, and that they are cast iron (I'm not sure about the cast iron part, I haven't checked them to tell)
So If the setup is going to be anything more than "normal rebuild" I think I will shy away from this diff for use. I want something that will be strong enough for street use, but not worried about drag use with it.
I have a separate diff for drag use in the works.
Who do you work for?
So If the setup is going to be anything more than "normal rebuild" I think I will shy away from this diff for use. I want something that will be strong enough for street use, but not worried about drag use with it.
I have a separate diff for drag use in the works.
Who do you work for?
I worked for Veteran Automotive in Illinois. The shop is one of the top in the country for corvettes and he specializes in diff and transmissions rebuilds
well from what I've found the 63-64 diffs, with the Eaton posi, something about the shims in each side, are weird (according to a diff builder) and some of the thicker shims need to be ground for ideal clearances. Sure a lot of rebuilders put in what is close and call it good, but backlash suffers, and I don't want to take a chance on this.
And the Eaton carrier kinda sucks for nailing the throttle....which I just can't NOT DO. Its there and I use it.....alot. My car is no trailer/garage/show queen. I like to drive it a couple times a week in decent weather. I plan on making ~450hp and just don't want to have a ? about the rear diff busting on me.
And the Eaton carrier kinda sucks for nailing the throttle....which I just can't NOT DO. Its there and I use it.....alot. My car is no trailer/garage/show queen. I like to drive it a couple times a week in decent weather. I plan on making ~450hp and just don't want to have a ? about the rear diff busting on me.
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79rustyk10
3/4 ton status
dont you have an auto in it to save the rear end too? I know Id surely be wreckin stuff with an auto, let alone a 4 speed.
I do, I put in a T400 when I went through the car years ago, and got tired of the broken parts in the drivetrain with a clutch. I broke 2 trans tailshafts, 3 clutches, 2 gears (Muncie's) and one U-joint. Now granted this stuff was old, but even launching the car was to variable for my liking. With the narrow tires I have to run, an auto makes for pretty much trouble free launches, and I haven't broke anything YET.
The T-400 I just rebuilt again, this time with a Coan kit, Coan reverse pattern, no braking manual valve body, a Coan pro street sprag convertor, a 34 element direct drum, and deep aluminum pan. Oh baby its nice.
The T-400 I just rebuilt again, this time with a Coan kit, Coan reverse pattern, no braking manual valve body, a Coan pro street sprag convertor, a 34 element direct drum, and deep aluminum pan. Oh baby its nice.
79rustyk10
3/4 ton status
sounds wicked.
This is the original 64 Diff....note the busted spring retainer for the clutchpak.
These old Eaton units aren't rebuildable anymore...and they are weak to be hammering the throttle like I do. This would be requiring replacement, and custom shims to blueprint the assembly.
This is the 69 unit....this will be having everything inside it replaced with parts to take up to 550 hp. Shouldn't have to worry with my 327....
A chipped tooth on the 4.11 ring gear....
I will be using a 3.90 gearset, so the 4 series carrier isn't going to work anymore.
These old Eaton units aren't rebuildable anymore...and they are weak to be hammering the throttle like I do. This would be requiring replacement, and custom shims to blueprint the assembly.
This is the 69 unit....this will be having everything inside it replaced with parts to take up to 550 hp. Shouldn't have to worry with my 327....
A chipped tooth on the 4.11 ring gear....
I will be using a 3.90 gearset, so the 4 series carrier isn't going to work anymore.
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These are the parts for the 10/12 bolt build up for the rear diff.
The Corvette rear end has mostly 10 bolt spiders,cross shaft, posi case etc. from the factory. The posi case/ ring and pinion have both been cryogenically treated to change the metallurgy, and make them stronger. Cost 150$.
The posi case has been polished to eliminate stress risers, which can cause cracks, and the ring gear surface will trued up.
When these units fail, its usually the posi case that cracks, so strengthening that anyway possible is a good upgrade.
The spider gears, axle drive gears, and cross shaft, will be upgraded to 12 bolt heat treated parts.
The unit will have precision fit clutch paks, eliminating the retainer spring set that is stock. The carrier cap on the left will also be replaced with a precision fit steel cap and 1/2" bolts to eliminate the carrier trying to push out of the housing on heavy footed escapades. The right cap will have upgraded bolts. The ring gear bolts will be upgraded to ARP's which then have to have the head turned down to fit in the housing.
The axles will be upgraded to Tom's 31 spline K/A flanged axles, that will be hardened.
This will be a trick piece when done....
The Corvette rear end has mostly 10 bolt spiders,cross shaft, posi case etc. from the factory. The posi case/ ring and pinion have both been cryogenically treated to change the metallurgy, and make them stronger. Cost 150$.
The posi case has been polished to eliminate stress risers, which can cause cracks, and the ring gear surface will trued up.
When these units fail, its usually the posi case that cracks, so strengthening that anyway possible is a good upgrade.
The spider gears, axle drive gears, and cross shaft, will be upgraded to 12 bolt heat treated parts.
The unit will have precision fit clutch paks, eliminating the retainer spring set that is stock. The carrier cap on the left will also be replaced with a precision fit steel cap and 1/2" bolts to eliminate the carrier trying to push out of the housing on heavy footed escapades. The right cap will have upgraded bolts. The ring gear bolts will be upgraded to ARP's which then have to have the head turned down to fit in the housing.
The axles will be upgraded to Tom's 31 spline K/A flanged axles, that will be hardened.
This will be a trick piece when done....
xCaliK5x
1/2 ton status
Awesome. You car looks really great. Your block stamping idea is great. I'm the first person with the option to buy my wifes uncles 66 big block 435HP 427 vert when he wants to part with it. I will get it for cheap too. I know what your thinking, thats a big money car, but he has owned it since the late 70's when a 10 or so year old vette was worth nothing, it has some 70's mag wheels and fender flares on it, he had the frame replaced too, and the 427 is long gone in favor of a built 454 so its far from a future concourse car. My plans would be for a huge cubic inch big block with fuel injection, decent trans, suspension and brakes. It sits in the garage and hasn't run in years. 
If I fix it for him, he may want to drive it and not sell it too me for even longer.
If I fix it for him, he may want to drive it and not sell it too me for even longer.
thats kinda the way my car was when I bought it. Far from original, and I wanted a hot rod, but REALLY loved the mid year bodies. So damn the torpedoes full steam ahead with what I wanted it to be.
I endorse you do the same when you can.
And a high HP bigblock will be screaming to tear up that stock posi unit..
I endorse you do the same when you can.
And a high HP bigblock will be screaming to tear up that stock posi unit..
