Okay so I have been really interested in putting a 8.8 from a mustang that I found close by (literately the house behind me) so I was wondering what would the advantage be and does anyone have one installed? I know the 8.8 is more popular than the 8" but the 9" is where everyone goes but I don't need a 9" also have a leak where the driveshaft and differential connect at the u joint, what's the cause and fix? Also I have parts missing from my engine bay, It was an a/c car but someone tell me what each hole that's covered is for and its purpose thanks
Not sure about eng. bay,but the rear end is your pinyon seal leaking.Drop the driveshaft & remove the big nut in the center of the yoke & remove the yoke & replace the seal.
The firewall plate is covering up the holes for the evaporator and heater core lines. Hopefully the AC heater box is still behind the dashboard.
there is a...crush sleeve...that needs to be replaced at the same time. there is a spec. that it is set to. too tight/loose is big trouble. really need to pull the chunk and see if there is any excess wear on the gears from low lube, being it has been leaking.
An 8 inch rear can take a lot of street or track abuse and the 9 is basically for more extreme use or ease of gear selections - why do you feel the need to go to an 8.8?
It's crushed to a specific torque... All the has to be done is mark position relative to pinion shaft(punch a couple dots) and re-tighten nut to that point... Done deal...
The reason round seals go: The bearings on the component that passes through the seal are getting worn out...Causing said component to wobble/drift damaging the seal. Other reasons: Dried out/cracked(From old age)...Over heated/cooked...Damage from foregin object. You can pull the pinion completely from the housing.It sits in its' own carrier assembly. Look at the bolts surrounding the pinion support,should be 5 of em. Dont loose the shims behind the support cover (Look like steel gaskets) You need to put em back in upon re-assembly. With the pinion/support out of the housing, you can inspect it to a degree. Have new bearings/crush sleeve/seal installed on it and re-assemble. NOTE: this does not guarantee pinion depth will be correct and the diff may be noisey afterwards. Best bet...Just rebuild the diff completely. It will be cheaper than modifying/re-building an 8.8 to put in the car...
Unless there were obvious bearing issues(noisy/howling) or excessive back lash problems, I've never had a issue just poppin' out the old seal, installing a fresh one and retightning to my original mark... If the leak is from under the pinion nut, it's almost a sure bet bearings are worn/loose...
From the looks of where the grease appears to be coming from...I think you nailed it Krazy Comet... Looks like its leaking past the pinion nut.
