Rebuild cone type sure-grip?

Posted By: DGS

Rebuild cone type sure-grip? - 03/21/11 01:13 PM

Has anyone rebuilt a cone type sure-grip? I know it is said that they're non-rebuildable but I found this on the site: http://www.moparts.org/Tech/Archive/axle/13.html

Sounds pretty simple to rebuilt and cheaper than a clutch type (I have access to a machining shop).

Correct me if I'm wrong but the sure-grip is a result of the friction of the cone and the case? That way I could machine the cones several times before the unit will be rendered useless.

I could get a cone unit for $120 - seller has no info about internal condition (got it part of a package deal) - original seller said it's ok. Good price?

Posted By: bigsbigelow

Re: Rebuild cone type sure-grip? - 03/21/11 02:05 PM

Price doesn't seem too bad considering new units are over $500. I say try it. I would have with mine but I am swapping my cone type for a clutch type my father gave me. The rebuild procedure definitely makes sense but when I talked to ring and pinion shops, they all told me cone types are NOT rebuild-able. Maybe they have not seen the Moparts tech archives.

Posted By: JohnRR

Re: Rebuild cone type sure-grip? - 03/21/11 02:16 PM

The rebuild is just a bandaid for a pisspoor design, think about why it needs to be rebuilt and the procedure. The cones have bottomed out, why ? Because they self destruct every time you make a turn. The gear oil is getting filled with small metal chips from this self destruction.

Posted By: Mick70RR

Re: Rebuild cone type sure-grip? - 03/21/11 02:17 PM

I rebuilt mine. I took 0.080" off each cone in a lathe and then put it back together with two 0.040" shims. Been on the car like that for 5 years and still working fine.

Posted By: crlush

Re: Rebuild cone type sure-grip? - 03/21/11 06:13 PM

Quote:

I rebuilt mine. I took 0.080" off each cone in a lathe and then put it back together with two 0.040" shims. Been on the car like that for 5 years and still working fine.

did the same thing, worked perfect.

Posted By: Russ_Davis

Re: Rebuild cone type sure-grip? - 03/21/11 06:33 PM

I've done a half dozen with several on the bench. Never had any problems with street cars. Won't last long racing. These lasted long lives from the factory, and there cheap and not hard to change.

Posted By: DJVCuda

Re: Rebuild cone type sure-grip? - 03/21/11 06:47 PM

Just pulled one out of my dads challenger - 383 4 speed car - he bought it new and it now has 114,000 miles on it

It lasted that long towing, daily driving and the occasional blast down the track with slicks.

One side was shot -the other cone was fine, but instead of band-aiding it he went with a Eaton Truetrac to get another 100k out of the rear

Posted By: 69L78Nova

Re: Rebuild cone type sure-grip? - 03/21/11 07:27 PM

I just picked one up for $40 in perfect working condition. Give it a shot. It's a good price

Posted By: DGS

Re: Rebuild cone type sure-grip? - 03/21/11 08:14 PM

I'll give it a shot - $120 doesn't seem to be a bad price. Although the true condition is unknown it looks fairly nice!

Posted By: scratchnfotraction

Re: Rebuild cone type sure-grip? - 03/21/11 10:10 PM

a member here on the board sell SS washer ready to install with directions on the how too

Trwaters IIRC

maybe PM him for a set of the washers/spacers and go for it

I have seen a few still going after one rebuild so far

i will be doing mine soon as well

good luck and post pics of the build

Posted By: RobX4406

Re: Rebuild cone type sure-grip? - 03/21/11 10:40 PM

Dr Diff has the shims as well.

Posted By: DaveRS23

Re: Rebuild cone type sure-grip? - 03/22/11 01:28 AM

I've machined several of them. Although not as strong a unit as the other, they have always worked fine. And I have never shimmed the gears, either.

Posted By: TrWaters

Re: Rebuild cone type sure-grip? - 03/27/11 02:37 PM

Quote:

The rebuild is just a bandaid for a pisspoor design, think about why it needs to be rebuilt and the procedure. The cones have bottomed out, why ? Because they self destruct every time you make a turn. The gear oil is getting filled with small metal chips from this self destruction.

GIVE IT UP MAN!!!!!!!!

A recent study shows that the worn cone material actually dissolves in the gear oil.

Yes, I have correct sized stainless shims made specifically for these. PM or email me.

Posted By: TrWaters

Re: Rebuild cone type sure-grip? - 03/27/11 02:51 PM

An earlier study suggested that as the metal cones wear, the particles are vaporized, and expelled out through the axle vent.

Posted By: JohnRR

Re: Rebuild cone type sure-grip? - 03/27/11 03:15 PM

Quote:

Quote:

The rebuild is just a bandaid for a pisspoor design, think about why it needs to be rebuilt and the procedure. The cones have bottomed out, why ? Because they self destruct every time you make a turn. The gear oil is getting filled with small metal chips from this self destruction.

GIVE IT UP MAN!!!!!!!! A recent study shows that the worn cone material actually dissolves in the gear oil.

Yes, I have correct sized stainless shims made specifically for these. PM or email me.

Tom, I'm not trying to take business from you but the cone type is what it is ... a bad design , but it does excel in one area , it generates business for replacement

Look at the current auburn cone type, it's a bigger piece of carp than the old Borg Warner