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Old 05-11-2011, 07:37 PM   #1
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Rear end problems...: (

I had a fun filled day jerkin out my rear end! The guy I bought the car from never said anything about a big rear end leak but I noticed an oil spot on the cover but just tightened the bolts and went on my way, well three days after I bought it the damn thing locked up!
I had it towed to the house and cracked the cover and it didn't have a single drop of gear oil in it....the damn pinion bearing welded it's self to the housing and it cracked and chipped the carrier bearing mounting surface.
So now a new rear end is in order!
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Old 05-11-2011, 07:39 PM   #2
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Re: Rear end problems...: (

Damn, gotta love those honest sellers

You going to get the same rear or upgrade?
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Old 05-11-2011, 07:47 PM   #3
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Oh I'll definitely upgrade....the car was fast as hell when I got it! It would pull so f-ing hard from 3000 rpm's to 6200 rpm's and I looked at the gears and it had stock 2.73's in it! I have a Vortech on the way and now I'll have to get a new trac-lock and 3.73's....I thought it was fast before, it's gonna be scary fast in a couple of weeks!!!
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Old 05-11-2011, 07:48 PM   #4
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Re: Rear end problems...: (

Yah no kidding...I think a beefier rear would be a good idea, lol.

I got to get me fox someday.
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Old 05-11-2011, 07:54 PM   #5
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Yeah,Fox's are a blast to drive!
I should upgrade to 31 spline 5 lugs but I can't afford new wheels and tires right now....especially since I just bought the Vortech kit a week ago! My wife would kill me..lol
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Old 05-11-2011, 08:01 PM   #6
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Re: Rear end problems...: (

Yah the 5 lug conversion kits aren't bad, it's the new set of 5 lug wheels/tires that cost you the coin. You might be able to find a cheap set of v6 wheels or weld draglites...they'd fit the 5 lug without modification, but probably wouldn't look as good on the car.
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Old 05-11-2011, 08:20 PM   #7
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I've never really liked the weld or draglites, it has 17in chrome cobra r's on now...I know everybody and their dog has these but they sure do look good on a lowered fox!
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Old 05-12-2011, 03:04 AM   #8
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Re: Rear end problems...: (

that sux...guess god is telling you "Thoust first mod will be NEW SET OF GEARS!"

Beautiful lil baby Jesus with curly hair, I Wanna Go Fast!-Ricky Bobby
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Old 05-12-2011, 04:18 AM   #9
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That's awesome!
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Old 05-12-2011, 06:06 AM   #10
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Re: Rear end problems...: (

Always build a car from the rear forward : Rear end ,Suspension , Trans ..... then add power to the motor or your just looking for trouble ... what good's all the power if you can't put it to the ground ??
hey maybe that guy had NO-Idea the rear was leaking or out of gear oil ??
you know how Many people neglect that part of their cars ? some NEVER change their diff fluid .......
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Old 05-12-2011, 06:42 AM   #11
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You would think someone would notice two gallons of gear oil in their driveway...just sayin' but anyway, your right about beefing up the whole drive line...I thought about going with an aluminum drive shaft but the car rev's fast as hell without it so I'll wait a while on that and as for the stouter rear, I'm just going to put 3.73's in and a new trac-lok for now and if I snap an axle, which I'm sure I will...that's a better excuse to go all out with the rear end, at least as far as my wife "the boss" is concerned! An as for the transmission, it has a new T-5 but it won't last long but I have a parts car with a new one and new clutch so I'm good there for a while! I would like to have a bullet proof rear and a TKO or V-spec T-56 and all the goodies but all that will come with time! Can't afford it all at once!
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Old 05-12-2011, 11:22 AM   #12
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Re: Rear end problems...: (

ouch
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Old 05-12-2011, 12:16 PM   #13
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Lol..yeah
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Old 05-12-2011, 10:32 PM   #14
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Re: Rear end problems...: (

That sux!
Here's something that may help in the future.

Note to Self:
Self, always check the fluid levels in any used vehicle you purchase.
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Old 05-12-2011, 11:51 PM   #15
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I will from now on, most definitely! I hate learning from mistakes....Especially when it's an expensive mistake!
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Old 05-12-2011, 11:53 PM   #16
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Re: Rear end problems...: (

Quote:
Originally Posted by 86gt View Post
I will from now on, most definitely! I hate learning from mistakes....Especially when it's an expensive mistake!
please... i owned my car for 1 month then threw a rod. i would have rather blew the rear end...
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Old 05-13-2011, 12:02 AM   #17
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That sucks!! Yeah I am lucky in that it could have been something more expensive that went out....hopefully I won't grenade the engine in a week or so when my Vortech gets here!
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Old 05-13-2011, 12:03 AM   #18
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Re: Rear end problems...: (

Quote:
Originally Posted by 86gt View Post
That sucks!! Yeah I am lucky in that it could have been something more expensive that went out....hopefully I won't grenade the engine in a week or so when my Vortech gets here!
good luck. im scared to get on mine now. might blow up again lol
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Old 05-13-2011, 12:37 AM   #19
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Re: Rear end problems...: (

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....hopefully I won't grenade the engine in a week or so when my Vortech gets here!
Make sure you research supercharging a stock block 5.0.
They are pretty weak due to the thinwall casting techniques used to make them and will split down the middle if too much boost is used, or they are ran too hard without proper tuning first.
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Old 05-13-2011, 12:40 AM   #20
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Re: Rear end problems...: (

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Originally Posted by Trojan Horse View Post
Make sure you research supercharging a stock block 5.0.
They are pretty weak due to the thinwall casting techniques used to make them and will split down the middle if too much boost is used, or they are ran too hard without proper tuning first.
+1 good call
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Old 05-13-2011, 05:41 AM   #21
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I'm thinking I'll be alright...it's suppose to be a 347...it feels like one and the previous owner ran juice through it, not sure what shot he used but there's holes it the rear hatch area where a bracket would go and nos inline fuel pump on it and a wot switch on the tb...so I'm guessing it a low compression motor! We'll see?!?
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Old 05-13-2011, 05:42 AM   #22
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I've done my homework!
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Old 05-13-2011, 07:20 AM   #23
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Re: Rear end problems...: (

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I'm thinking I'll be alright...it's suppose to be a 347...
If you are lucky and they used an aftermarket block, then you may be, but a 347 is just a bored and stroked 302. Which means even more material has been removed from an already weak base.
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Old 05-13-2011, 07:33 AM   #24
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I realize that, that's why I ordered a base kit from Vortech. 5 to 6 lb's of boost will not be anywhere near enough to split a production block! I plan on increasing boost in slow small increments till I do actually break something then it will be time for a fully built R-block stroked to a 427 with at least 15lb's of boost
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Old 05-13-2011, 07:56 PM   #25
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Re: Rear end problems...: (

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I realize that, that's why I ordered a base kit from Vortech. 5 to 6 lb's of boost will not be anywhere near enough to split a production block! I plan on increasing boost in slow small increments till I do actually break something then it will be time for a fully built R-block stroked to a 427 with at least 15lb's of boost
From the personal experience of one of my friends, a Vortech at 6 lb's is quite enough to split the block right down the center.
Add that pressure to the overboring required to produce 347 CI.....just be careful and keep it well tuned.

I'm putting a Paxton Novi 2000 on my 86 GT.
I have a Keith Craft built stock block 306 CI that puts out 405 hp at the crankshaft.
Before I install the Paxton, I will be installing a DSS main stud girdle and windage tray, a Valley Girdle Pro, 60lb Siemans DEKA injectors, a Mr Freeze methanol injection system and an ABACO 97mm MAF. Then it will be tuned using the AFM PMS.
Those modifications along with a forged bottom end are said to be able to support up to 650 hp using a stock block. We'll see if they will. The Paxton will produce up to 20 PSI. I'm starting out at 8-12 psi and working my way up from there.
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