help me ID this 8.8 rear end

[stangman16]

Can you tell me what vehicle this 8.8 rear end came from? This 8.8 is in my Mustang, but I'm having so many problems with it, it's unbelievable. Simple brake change? Not with this thing... I just want to check and make sure the collision center put the correct 8.8 in my '99 Mustang GT.

Here's what the tag on the differential cover reads:

S229H
3L27 88 1M17

I sure hope that 88 in the center isn't from an '88 mustang... Any suggestions what vehicle and year this thing is from? Thanks for any help!

 

[Chili]

Can you tell me what vehicle this 8.8 rear end came from? This 8.8 is in my Mustang, but I'm having so many problems with it, it's unbelievable. Simple brake change? Not with this thing... I just want to check and make sure the collision center put the correct 8.8 in my '99 Mustang GT.

Here's what the tag on the differential cover reads:

S229H
3L27 88 1M17

I sure hope that 88 in the center isn't from an '88 mustang... Any suggestions what vehicle and year this thing is from? Thanks for any help!

It is more likely that the 88 represents 8.8".. Similar to the 373 stamped on a 3.73 ring gear. Not sure though, good luck..

 

[Kilgore Trout]

3L27 = 3.27 gear ratio
88 = 8.8"

I think the 1M17 is the manuf date but I do not know how to decode it...

 

[Mustang5L5]

Yup, it's a 3.27 Limited slip rear end.

That means it came from either a 99-04 GT, a 96-98 Cobra or a 87-98 GT AODE with optional 3.27's.

Judging from the other numbers, it does sound like the correct rear end year span.

WHat problems do youy have exactly?

 

[stangman16]

Thanks for the replies, I appreciate it. Well, after having done the drivers side (which was a pain)... I had a problem getting the Caliper back on and aligned with the top bolt hole. I had to use a hammer and jam the bolt in a little bit. After doing the Passengers side, and noticing that both top and bottom bolts for the caliper mounting, were easily moved inward and outward for mounting the caliper. So, I'm guessing that the drivers side top bolt is messed up, and I'm not able to pull the mounting bolt/slider out (as so I've tried to)... Does that mean I would need a new caliper bracket?

With the passengers side, I couldn't get my tire off. I had to kick one side of the tire really hard & carefully so the car wouldn't tip over. The rim is kinda carved out now, where the rim connects to the axle (or is it the hub?) Well, that piece is rusted, but I don't really see how it could carve the rim like it had. It makes me furious to know that they forced it on there to begin with. I just cannot find a collision center who does honest work.. but then again, if you want something done right you've got to do it yourself. Lesson learned.

God bless, and good day!

 

[Mustang5L5]

Thanks for the replies, I appreciate it. Well, after having done the drivers side (which was a pain)... I had a problem getting the Caliper back on and aligned with the top bolt hole. I had to use a hammer and jam the bolt in a little bit. After doing the Passengers side, and noticing that both top and bottom bolts for the caliper mounting, were easily moved inward and outward for mounting the caliper. So, I'm guessing that the drivers side top bolt is messed up, and I'm not able to pull the mounting bolt/slider out (as so I've tried to)... Does that mean I would need a new caliper bracket?

Yes that is correct. The caliper bolts to the caliper bracket which then bolts to the axle flange bracket. There are two threaded spots for the bolts that hold the caliper to the caliper bracket. Each has a rubber boot on it and is designed to slide in and out slightly. That way when the pads wear down, the caliper self centers.

If 1 does not move. that means it's seized and you'll only wear down the pads on 1 side.

To fix it, take the caliper bracket off. The pins simply pull out. The boots will pop off and you can clean up the shaft and lubricate it with caliper grease. If it will not come out, you will need a new bracket.

It's actually a common problem and should be checked anytime you do rear brakes.

 

[stangman16]

Thanks, I'm guessing I'll need to replace it. I'll try and take it out and see what i've got. Any idea on how much that will cost?