So I have a 86 mustang and my dad bought my 8.8 rear diff. So I took his 7.5 rear. I raced my car a few times and it broke. So I went to the junk yard and all I could find was another 7.5 It lasted 4 months with me smoking the tires every day and driving 100 miles a day to work. Its broke now too. I want my 8.8 back. So why are 7.5 so weak. Im stock engine with after market H pipe and flow masters. Performance air filter thats all.
2006-07-15 22:13:53 · 16 answers · asked by Anonymous in Cars & Transportation ➔ Car Makes ➔ Ford
hear this all the time.only thing wrong is from the blue oval on the grille to the rear bumper.by a bowtie and problem is solved.then park it,grow up and quit burning tires everyday (unless daddy buys them 4 u also)stock engine that is 20 yrs old with probably lots of miles and flow masters and now u think it is fast.my sons go cart can burn the tires,what is the big deal about it?i like the smell of burnt rubber too but if it was my daily driver then take it easy so u can drive it to work.u cant rod it now that it is broke can u?
2006-07-16 08:01:48 · answer #1 · answered by Anonymous · 2⤊ 1⤋
Because you probably got a 5.0 that the 7.5 rear end wasn't made for that torque....
All the 7.5 were made for were rangers and mustangs running anemic 4 cyl and 6 cyl. grocery getter engines. The rangers even went to an 8.8 rear end if you bought a 4x4 v6 model, because the rear end wasn't made for holding to abuse.
Go find a 8.8 or drop a 9 inch in the rear if you like smoking them... You're lucky that one survived 4 months...
2006-07-16 13:37:28 · answer #2 · answered by gearbox 7 · 0⤊ 0⤋
In 85 I believe they went with the 8.8. My 84 GT had the 7.5 and it blew once i did mods. I picked up a rebuilt 8.8 from a rearend shop with 355 gears and it rocked. Why you would let someone swap your rearend out to an inferior one is not right. Tell him to buy you one because he and you know darn well that a 7.5 is not what goes in. That was pretty crappy of him if you ask me. Oh and don't get me started on the crappy bowtie 305 and it's weak rearend...
2006-07-16 19:50:23 · answer #3 · answered by svt 3 · 0⤊ 0⤋
They are weak because they are smaller, thats the reason they made the 8.8, they normally brake the spider gears or pin. They use the same axles as the 8.8, the carrier is just weak.
2006-07-17 21:48:14 · answer #4 · answered by sunflowerlizard 6 · 0⤊ 0⤋
The 7.5 was made for the 4 and six cyl motors, lighter weight for them. 8.8 for sport models with the big motors.
2006-07-16 14:00:05 · answer #5 · answered by Josh S 7 · 0⤊ 0⤋
could be that a 20 year old car with a second or perhaps third hand diff, just can't take a clutch dropper like you at its advanced age.
Try to go easy on it or buy a car that can handel your smoke tyre style of driving.
;) H
2006-07-16 05:20:16 · answer #6 · answered by H 3 · 0⤊ 0⤋
go to www.car-parts.com and put your specs in. choose your location and if you answer the questions right...it will tell you a ton of places that you can get the right rearend and stop wasting your money on the wrong one. if the right one blows up. check our www.summitracing.com and buy a racing diff
2006-07-16 05:30:03 · answer #7 · answered by riccarper 1 · 0⤊ 0⤋
Your car is possessed with the soul of an ancient chinese warlord. Take it out into the country and leave it. If you sign the title and leave it on the seat, all your problems will disappear!!!
2006-07-16 05:19:14 · answer #8 · answered by troutpotato 4 · 0⤊ 0⤋
get a custom made 9" . even the chevy guys do that. if you sell the car you can pull the pig and stick in a cheap 3.00 set
2006-07-16 10:40:26 · answer #9 · answered by Thomas H 4 · 0⤊ 0⤋
Ain't nothing "weak" about a Ford. ya gave up the good and got less. Did ya learn a lesson?
2006-07-16 05:19:22 · answer #10 · answered by Anonymous · 0⤊ 0⤋