Rear-End gears

hemi_fan

Active Member

Apr 8, 2004

279

3

28

Ontario, Canada

Jun 3, 2004

#1

• Jun 3, 2004

• #1

I want to get some 4.10 gears for my car. I opted for them since I dont really do any highway driving, so they shouldnt hurt my mileage much, and they should give me a performance boost. BUT, what parts do I need to get in order to do a complete change to 4.10 gears other than the basic Ring and Pinion gears...?

 

ECU5.0

Banned

Jan 10, 2004

1,803

1

0

raleigh, nc

Jun 3, 2004

#2

• Jun 3, 2004

• #2

http://secure.50resto.com/product1.cfm?SID=1&Product_ID=1904&Category_ID=652
get that and some new gear oil and friction modifier. you might want to go ahead and rebuild the tracloc also and replace your axle bearings since the axles will come out anyways

 

hemi_fan

Active Member

Apr 8, 2004

279

3

28

Ontario, Canada

Jun 3, 2004

#3

• Jun 3, 2004

• #3

thanks, i was lookin at that, just wasnt sure if thats what i needed.

 

hemi_fan

Active Member

Apr 8, 2004

279

3

28

Ontario, Canada

Jun 3, 2004

#4

• Jun 3, 2004

• #4

Any idea how much gears would shave off of a 1/4 time? Say for example that I run 15.0 seconds stock with my 3.08s... any estimates?

 

90mustangGT

I felt sorry for girls because

Founding Member

Jan 15, 2002

2,773

17

89

Dallas, GA

Jun 3, 2004

#5

• Jun 3, 2004

• #5

You'll probally be in the low 14's, maby even 13's with something sticky on the rear wheels. Your going to love them!!!

 

beaver2489

Founding Member

Feb 26, 2002

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st. joseph missouri

Jun 3, 2004

#6

• Jun 3, 2004

• #6

going from 2.73's to 4.10's in a 5speed is supposed to shave off about .4sec +/-. It makes a huge SOTP difference. Oh, and I used some red RTV silicone to seal the rear cover. and go to walmart, they have a gear oil pump that screws to the top of the bottle and pumps the gear lube through a hose into the pumpkin. makes less of a mess. don't forget to put the friction mod fluid in!

 

maverick0716

Founding Member

Jan 12, 2002

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Chilliwack, BC, Canada

Jun 3, 2004

#7

• Jun 3, 2004

• #7

beaver2489 said:

going from 2.73's to 4.10's in a 5speed is supposed to shave off about .4sec +/-. It makes a huge SOTP difference. Oh, and I used some red RTV silicone to seal the rear cover. and go to walmart, they have a gear oil pump that screws to the top of the bottle and pumps the gear lube through a hose into the pumpkin. makes less of a mess. don't forget to put the friction mod fluid in!

Click to expand...

Yeah, maybe if you're roasting off the tires with the 4.10s.......in reality if you can get it to hook, you'll see huge gains.

 

hemi_fan

Active Member

Apr 8, 2004

279

3

28

Ontario, Canada

Jun 3, 2004

#8

• Jun 3, 2004

• #8

Wow, really!?! a full second off my times on a tire!?! thats wicked man. i thought it would be like .3 seconds or something...

 

fordman54935

Member

Jan 10, 2003

301

0

16

Wisconsin

Jun 4, 2004

#9

• Jun 4, 2004

• #9

If you plan on doing the swap yourself, you'll need a dial indicator and magnetic base to set the backlash. Also, inspect the carrier bearings and races as well as the wheel bearings, and I'd replace the axle seals too while you have the axles out (even if they aren't leaking). Other than that, you'll need some new shims as well to get the backlash set properly, which are available at your local Ford dealership or tranny/rear-end shop. There is a chart in the Chilton's Mustang repair manual that tells you which shim to use to correct for X amount of backlash, or i'm sure the dealership could has that chart available also.

Hope this helps!