where can i find a good set of gears?

[truegraw]

looking to go to 4:10's wheres a good place to find what i need for the swap without upgrading axles?

[gdsqdcr]

Sparta ... They are even a vendor here!

[ChiTownMaraud3r]

Don't need to upgrade axles, just buy the 4.10s online, find a reputable mustang shop and have them drop those bad boys in there.

Might be wise to check for leaky axle while they're down there.

[Curless]

Shoot Tommy an e-mail at Sparta Performance. We use him exclusively here at Curless Auto Repair. Prices are good and he's right on top of the shipping! We always get our orders with in two days! Thanks again Tommy!

[Haggis]

Tommy is the man!!!! :bows:

[SC Cheesehead]

Also, you're gonna want a tune to reset the shift schedule and speedo for the 4.10s.

[BCMARAUDING]

I'm looking at the Sparta 4.10's with the C package install kit as well as S spring and carbon clutches......anyone running that setup? Reviews?

I've chatted with Paul and he gave a good review just wondering if anyone else is running it?

Anyone have an approximate install time for the swap?

[fastblackmerc]

I'm looking at the Sparta 4.10's with the C package install kit as well as S spring and carbon clutches......anyone running that setup? Reviews?

I've chatted with Paul and he gave a good review just wondering if anyone else is running it?

Anyone have an approximate install time for the swap?

I've been running that setup for about 5years... didn't get them from Sparta though...

No problems.

Find a local shop that works on Mustangs, they can do the swap. Two maybe three hours to do the install.

Remember to get 70w140 gear oil. If you get synthetic fluid you don't need to use any friction modifier.

[BCMARAUDING]

I've been running that setup for about 5years... didn't get them from Sparta though...

No problems.

Find a local shop that works on Mustangs, they can do the swap. Two maybe three hours to do the install.

Remember to get 70w140 gear oil. If you get synthetic fluid you don't need to use any friction modifier.

Sweet! Thanks for the info!

[champ1173]

I've been running that setup for about 5years... didn't get them from Sparta though...

No problems.

Find a local shop that works on Mustangs, they can do the swap. Two maybe three hours to do the install.

Remember to get 70w140 gear oil. If you get synthetic fluid you don't need to use any friction modifier.

If it takes about 2-3 hours, How much do you think that is in labor?

[fastblackmerc]

If it takes about 2-3 hours, How much do you think that is in labor?

All depends on the shops labor rate which varies from shop to shop.

[Mr. Man]

If it takes about 2-3 hours, How much do you think that is in labor?
Better to overestimate the cost. You never know what sort of gremlins might pop up during the install. I'd go in thinking 100 bucks an hour hoping I'm over thinking it and if there is money left over yea bonus me :banana:

[lifespeed]

Unless you have rebuilt the axle assembly recently (yeah right) you may as well do the whole thing at one: axles, bearings and seals, clutches and side gears (or just replace the diff).

That stuff all wears out, and yours is probably at the end of it's life. Just guessing.

Doesn't make much sense to go in there for a gear change, then go back in a year or two and rebuild the thing because it is shot.

[tbone]

Change your clutches while you're at it. I learned the hard way......

[BCMARAUDING]

My 03 Marauder has 80,000kms (49,709miles) on the clock. Just wondering what your opinion was on a complete swap when I do the 4.10's? (axles, bearings and seals, clutches and side gears).

[fastblackmerc]

My 03 Marauder has 80,000kms (49,709miles) on the clock. Just wondering what your opinion was on a complete swap when I do the 4.10's? (axles, bearings and seals, clutches and side gears).

Probably won't need to do everything, but you'll never know until you open it up.

[lifespeed]

Clutches for sure, they are a wear item.

The rest of it look at carefully. Given the cost of labor (yours or hired), I would say any visible wear justifies replacement.

[Micahdogg]

Has anyone noticed ill effects with the carbon clutches? I imagine if they have too much friction and/or the upgraded spring is too stiff, it could make some chattering/grinding noises in tight parking lot type turns.

[fordmike65]

None at all. Smooth as butta.

[Micahdogg]

^ with 70w140 synthetic I assume?

[fordmike65]

Yes. Pre-soaked in friction modifier & a bottle added to fluid as well.

[Micahdogg]

Good to know, thanks for the feedback!

[fastblackmerc]

There is no need for friction modifer if using most synthetic fluids. Presoak the clutches in the synthetic fluid.

[GreekGod]

The 8.8 is a copy of the GM Salisbury rear axle. It is a crap axle, but we are stuck with it.

To "fix" an 8.8, the "best" repair is 31 spline axles, a solid pinion spacer, and an Eaton Truetrac.

I don't know if anyone makes 31 spline axles with ABS rings on them for 9" Ford bearings, but changing the axle tube ends over to the big Ford bearing ends would also be a great improvement over the very poor OEM design. The C-clip axle retainers and axle bearing wear surfaces are a cheap & poor design.

===================

[lifespeed]

The 8.8 is a copy of the GM Salisbury rear axle. It is a crap axle, but we are stuck with it.

To "fix" an 8.8, the "best" repair is 31 spline axles, a solid pinion spacer, and an Eaton Truetrac.

I don't know if anyone makes 31 spline axles with ABS rings on them for 9" Ford bearings, but changing the axle tube ends over to the big Ford bearing ends would also be a great improvement over the very poor OEM design. The C-clip axle retainers and axle bearing wear surfaces are a cheap & poor design.

I agree with half of what you wrote. The axle shafts and bearings are cheap and don't last. Welding on 9" axle housing ends to use a proper large bearing with 31 spline axles is a really nice fix, albeit expensive. Probably require some fabrication of the caliper mount also. Really the way to go, you'll never replace another axle and the bearings should last darn near forever.

The GM 12-bolt axle with 8.875" ring gear (after which the Ford 8.8" is patterned) is a very sturdy and long-wearing design, with the same exception of poor axle/bearing design. As an aside, the Pontiac versions included semi-floating axles from the factory, but were rare. Typically Chevrolet 12-bolt axles and bearings are upgraded by their owners to semi-floating as mentioned previously.

The Ford 8.8" carrier, ring and pinion are actually quite strong and have less parasitic drag than a Ford 9". When set up properly, with a solid pinion spacer, they are more than adequate for the vast majority of applications including drag racing.

[GreekGod]

...The GM 12-bolt axle with 8.875" ring gear (after which the Ford 8.8" is patterned) is a very sturdy and long-wearing design, with the same exception of poor axle/bearing design

The Ford 8.8" carrier, ring and pinion are actually quite strong and have less parasitic drag than a Ford 9". When set up properly, with a solid pinion spacer, they are more than adequate for the vast majority of applications including drag racing.

Yes, the 8.8 is strong, but I failed to mention that the axle tubes need welding to the center casting. Of course, the Salisbury design lacks a drop-out center section like the 9" has. I was told a weak point in the GM 12 bolt is the ring gear bolts?

http://www.chevyhiperformance.com/techarticles/0304_9_inch_12_bolt_rearend_co mparison/

=====

[lifespeed]

Yes, the 8.8 is strong, but I failed to mention that the axle tubes need welding to the center casting. Of course, the Salisbury design lacks a drop-out center section like the 9" has. I was told a weak point in the GM 12 bolt is the ring gear bolts?

http://www.chevyhiperformance.com/techarticles/0304_9_inch_12_bolt_rearend_co mparison/

=====

Funny you should mention that! I busted the ring gear bolts in my 1970 GTO with Chevy 12 bolt. Replaced with grade 8 and was fine.

[STEPS]

Also, you're gonna want a tune to reset the shift schedule and speedo for the 4.10s.




like he said