Never heard of a 9 inch 3:89 ???

[prayers1 153]

A guy has a Ford 9 inch 28 spline 3.89 posi t-lock 3rd member for $300.00. It was rebuilt 6 years ago and has about 100 miles. He tore his 1966 Fairlane GT apart and sold it off as parts.

 

I have the carrier, 28 spline axles and etc.. to build the rear.

Would like to know your opinion.

 

Also, I never heard of the gear ratio 3:89 or posi T-Lock. I'm familiar with 3:75, 3:90, 4:10 ratio's and Posi or Detroit Lockers.

 

Thanks, John

[prayers1 153]

A guy has a Ford 9 inch 28 spline 3.89 posi t-lock 3rd member for $300.00. It was rebuilt 6 years ago and has about 100 miles. He tore his 1966 Fairlane GT apart and sold it off as parts.

 

I have the carrier, 28 spline axles and etc.. to build the rear.

Would like to know your opinion.

 

Also, I never heard of the gear ratio 3:89 or posi T-Lock. I'm familiar with 3:75, 3:90, 4:10 ratio's and Posi or Detroit Lockers.

 

Thanks, John

[Cruzzar 22]

I believe that if you do the math, what is referred to as a 3:90 ratio is really 3:89! They are both the same.

[Cruzzar 22]

I believe that if you do the math, what is referred to as a 3:90 ratio is really 3:89! They are both the same.

[shelbyshelby 52]

I know ford made them. I had a set in the early 90's that were taken from a f100 truck. They really woke up my J-code 302.

[shelbyshelby 52]

I know ford made them. I had a set in the early 90's that were taken from a f100 truck. They really woke up my J-code 302.

[strokedwindsor 11]

i got one on my 69 mach1 3.89 from currie..

[strokedwindsor 11]

i got one on my 69 mach1 3.89 from currie..

[prayers1 153]

I have an 8" in there now and just did a complete brake rebuild. Will I be able to transfer the wheel cylinder's, brake hardware, backing plates and drums over to the 9". Both rears have 28 spline axle's. I do have the 28 spline axles for the 9", but was wondering if the 8" axles would also fit the 9". If not, what's is the difference?

[prayers1 153]

I have an 8" in there now and just did a complete brake rebuild. Will I be able to transfer the wheel cylinder's, brake hardware, backing plates and drums over to the 9". Both rears have 28 spline axle's. I do have the 28 spline axles for the 9", but was wondering if the 8" axles would also fit the 9". If not, what's is the difference?

[LiLMike 42]

Here is a thread that may help you.

 

http://forums.vintage-mustang.com/vintage-mustang-forum/333723-difference-between-8-9-housings-drums-axles.html

[LiLMike 42]

Here is a thread that may help you.

 

http://forums.vintage-mustang.com/vintage-mustang-forum/333723-difference-between-8-9-housings-drums-axles.html

[MikeStang 247]

Hell i have a Detroit true trac already set up and ready to go if you are looking to buy a ready to run unit....it is totally fresh, no use...but its for 31 spline axles.

I also have a set of backing plates for the big drums...they are fully assembled but i would replace all the hardware and shoes

[MikeStang 247]

Hell i have a Detroit true trac already set up and ready to go if you are looking to buy a ready to run unit....it is totally fresh, no use...but its for 31 spline axles.

I also have a set of backing plates for the big drums...they are fully assembled but i would replace all the hardware and shoes

[buening 63]

Mike, what are you asking for that 3rd member?

[buening 63]

Mike, what are you asking for that 3rd member?

[Guest Dirty Herri]

http://www.summitracing.com/parts/RMG-6901771/

 

I have set of 3.89 gears in my F100. Got them at Summit and were made by Richmond Gears.

[Guest Dirty Herri]

http://www.summitracing.com/parts/RMG-6901771/

 

I have set of 3.89 gears in my F100. Got them at Summit and were made by Richmond Gears.

[prayers1 153]

Can someone tell me what the difference is between a T-lock and a limited slip rear.

[prayers1 153]

Can someone tell me what the difference is between a T-lock and a limited slip rear.

[prayers1 153]

LiLMike,

Forgot to tell you, thank you for the good information.

[prayers1 153]

LiLMike,

Forgot to tell you, thank you for the good information.

[buening 63]

T-lock and limited slip are the exact same thing. Traction lock is essentially Fords name for a limited slip. They use clutches to transfer the power to the left tire. Others like a Detroit Locker, use gears.

[buening 63]

T-lock and limited slip are the exact same thing. Traction lock is essentially Fords name for a limited slip. They use clutches to transfer the power to the left tire. Others like a Detroit Locker, use gears.

[LiLMike 42]

You're welcome Prayers. I have received help here and glad I could return the favor.