what size rear,gears and spline in a 86?posi or mini spool?

J

johnsplowing207

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Mar 2, 2010

#1

• Mar 2, 2010

• #1

what size is the stock rear in my 86 5.0 5 speed,and what should the stock gears be and the spline on the axles?
and should I go with a posi or mini spool?

 

84Ttop

They make new pistons every day, so why worry?

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#2

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Look at the tag on the back cover. It is usally under one of the bolts, it should have all the info you need. Differant cars had differant gear ratios, so who know what it came with, or for that matter what anyone as done in the last 24 years. As far as a mini spool, NO Way! Get yourself a nice posi unit. Eather a track lok and rebuild the clutches or find a 31 spline truck diff and rebuild that w/ some new axles. Stock spline is 28 btw

 

tannerc91gt

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#3

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• #3

+1
you won't want a spool on the street. It should have an 8.8 rear

 

J

johnsplowing207

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#4

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is'nt a mini spool stronger?

 

84Ttop

They make new pistons every day, so why worry?

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#5

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A mini spool is for circle track cars. A good posi is all you need. There is a big differance between a Spool and a mini spool. A spool is one solid piece, whereas a mini spool just replaces the spider gears in your current differential.

 

Q

qwomack

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#6

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• #6

johnsplowing207 said:

is'nt a mini spool stronger?

Click to expand...

Stronger than what? A mini-spool is stronger than a track-lok but your axles become the weak link. Not only that, a mini-spool will go through tires so fast that it will actually be more expensive than a good new limited slip unit on the street.

My $0.02.

 

84Ttop

They make new pistons every day, so why worry?

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#7

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Spool or no spool, your driving determines your tire wear. The mini spool is no stronger than the track lok because it's in the same differential. x2 on stock axles being junk!

 

Q

qwomack

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#8

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84t-top said:

Spool or no spool, your driving determines your tire wear.

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You will dramatically increase tire wear with a spool going around corners.

 

84Ttop

They make new pistons every day, so why worry?

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#9

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All of the cars we have do have spools and are street driven everywhere, I mean we don't get 30,000 miles out of tires, but then again we have drag radials on all the time and go through 2 or 3 sets a year.

 

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johnsplowing207

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#10

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84t-top said:

All of the cars we have do have spools and are street driven everywhere, I mean we don't get 30,000 miles out of tires, but then again we have drag radials on all the time and go through 2 or 3 sets a year.

Click to expand...

do you need to use c-clips on a mini spool?

 

tannerc91gt

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#11

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I thought about a spool as I pretty much only drive straight and will be running radials and don't give a damn about mileage. But we'll see...

OP- I recommend a new tlock, no need for a spool

 

84Ttop

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#12

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johnsplowing207 said:

do you need to use c-clips on a mini spool?

Click to expand...

yes a mini spool still retains the stock c clips, but will only fit inside an open differential. in other words, you cant put a mini spool in place of your track lok. you could always be ghetto and weld the gears, but I would definatly not recommend that!

 

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johnsplowing207

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#13

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well since I only leave one goofy mark instead of two, I"m guessing its a open and not a posi.lol

 

84Ttop

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#14

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not nessicerally, you could have a worn out track lok that needs to be rebuilt. It's as simple as pulling the diff cover and looking at the diff. If it has a big s spring in the center around the pin and clutch packs on each side you have a track lok, if it has no spring or clutches - open rear.