Best Place to Buy GM EATON 800 8.5" Posi
 

Time to find an 800# Eaton Posi.
1995 Impala SS 8.5 Inch Rear.

My 400lb will not hold the launch RPM.
Over 2500 rpm the Tires become unhinged. At or below launches fine.
Use to hit it at 3000 when the rear Brakes Held the Torque.
That is another fix coming.

Driving to the tracks and street most likely weakened the Grip Capability.

Want to buy a Eaton 800# but need advice the on better Clutch Pack.
Will then rebuild the current one but need advice on which Clutch Pack to use or have it Rebuilt.

Dan

Re: Best Place to Buy GM EATON 800 8.5" Posi
 

How about a spool now Dan since you're looking into a trailer?

Re: Best Place to Buy GM EATON 800 8.5" Posi
 

Scott:
Love the idea but in Pure Stock not allowed a Spool..

Dan

Re: Best Place to Buy GM EATON 800 8.5" Posi
 

RATS! Now I have to take my rear-end apart this winter ... :rolleyes:

Re: Best Place to Buy GM EATON 800 8.5" Posi
 

Dan--- why don't u just buy the 800# preload kit available under Eaton part number 29591-OOS this is the 800 pond pre load kit springs & plates available from Summit for $89.97 ---by th way Summit shows a picture of it ----Has to be cheaper than buying a whole posi unit for about $450 ---Good luck FED 387

Re: Best Place to Buy GM EATON 800 8.5" Posi
 

Thanks FED..
Yeah, seriously thought about that..!

A new Posi would be twice the cost to rebuild but simpler quicker to install.
PN for the Springs is $90, Carbon Disks another $119.00.
It is still good for the street and drag racing.

Have the option keeping it for a street project, the 94 Caprice SSuperwagon being set up for towing or sell to a B-Body racer.
Should be a wash after selling it.

In past have rebuilt a 12bolt Moroso Posi with new Springs from Al's Differentials.
Built a clamp tool out of 2x4 and to force them inside the cavity with a hammer.

Eaton has three types of clutch service kits.
OE, 18 disc (standard), 24 disc (high performance), the modern day, high tech 14 disc carbon fiber design.

Last night studied all about their characteristics.
Still need advice on which of the last 2 to buy.

Dan

Re: Best Place to Buy GM EATON 800 8.5" Posi
 

Call the Eaton tech line: 800-328-3250 Either Barney or Brent should be able to steer you in the right direction.

Re: Best Place to Buy GM EATON 800 8.5" Posi
 

That is great information..thanks.

D

Re: Best Place to Buy GM EATON 800 8.5" Posi
 

FYI..that Number is for some Florida Vacation spam..

Here is his correct information

Brent Bussell -Customer Support
Technical Specialist
Phone# (248)226-6762
Fax# (248)226-6740

Re: Best Place to Buy GM EATON 800 8.5" Posi
 

toll free # is 800-328-3850 x 6762-otherwise the other # is his direct line phone #-FED 387

Re: Best Place to Buy GM EATON 800 8.5" Posi
 

Thanks:

Brent suggested for Drag Racing using the 24 Disk Steels.
For the Street the 18 Disk Steels..

Dan

Re: Best Place to Buy GM EATON 800 8.5" Posi
 

Dan .. my Eaton catalog shows 1988 -96 10 bolt clip 8.5 / 8.6 with 30 spline 2.73 gear & up # 19559-010

Re: Best Place to Buy GM EATON 800 8.5" Posi
 

My apologies. I got the number from the product engineer in the cube next to them. He must have fat fingered the number.

Re: Best Place to Buy GM EATON 800 8.5" Posi
 

No Problem..

I have finger dyslexia too:eek:

Contacted Brent and he gave me a wealth of information.

Dan

Re: Best Place to Buy GM EATON 800 8.5" Posi
 

I spent more than half my life at the place where the original posi's were built and developed. Allmost all the service units used to be built by hand, they used channel lock pliers to install the preload plates and pounded them in with a hammer. Put as much shim as you can and still assemble the unit-to still be able to put in the pinion gears and washers. They used Texaco Marvak grease to hold the clips on the clutch packs and used gear lube to soak the individual clutches before assembly. It helps if you have a t wrench made from about a 6 inch piece of axle splined to turn the top gear. All the clutch packs were broken in on the factory units, so you may have to take the unit out and reshim if you use new clutch discs that aren't broken in. Make sure you don't use the slotted clutch discs, those were designed to prevent from breaking axles in the oem units unless you can't get anything else. The original units built before the 1980's had cut gears (with the gear teeth cut after the blank was machined)in them but in the 1980's they went to a forged tooth gear (gears were machined by locating on the gear teeth) that was far better than the earlier cut gears. The earlier gears can't be used with the later gears. Hope this provides some more info than what you had.