Gears whining?? - Ford Mustang Forum
 
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post #1 of 9 (permalink) Old 11-03-2010 Thread Starter
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Gears whining??

So i have done plenty of research and it seems Motive Performance gears are known for whining. I am about to upgrade from 3.73 to 4.10 gears this weekend and was wondering if anyone knew how to not make these gears whine? My 3.73 gears whine alottt right now. Anyone know? I have the 7.5" rear end.


2010 V6 Mustang Auto pony package
Go: BBK Shorty Headers, Dual Exhaust, 4.10 Gears w/ LSD, 93 Octane SCT Tuned, Bosch Plat 4 Spark Plugs, J&M Camber plates, 06 GT Shocks/Struts, BBK CAI, Eibach lowering springs
Show: Steeda Strut tower brace, 4.0 Billet fuel door, Blackout rear end

Future mods: SD Coil pack/wires, Drag Radials.

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post #2 of 9 (permalink) Old 11-03-2010
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Its all in how the teeth are machined and how they are meshing up.

I've heard the FRPP ones are quieter but not sure if they make 4.10s for a 7.5" rear...



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post #3 of 9 (permalink) Old 11-03-2010 Thread Starter
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Yea, I think the only company that makes em for the 7.5 are Motive.

2010 V6 Mustang Auto pony package
Go: BBK Shorty Headers, Dual Exhaust, 4.10 Gears w/ LSD, 93 Octane SCT Tuned, Bosch Plat 4 Spark Plugs, J&M Camber plates, 06 GT Shocks/Struts, BBK CAI, Eibach lowering springs
Show: Steeda Strut tower brace, 4.0 Billet fuel door, Blackout rear end

Future mods: SD Coil pack/wires, Drag Radials.

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post #4 of 9 (permalink) Old 11-03-2010
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Ford has 4.10s in the Ranger 7.5" rear ends. At least my 2001 ranger 2.3L has them stock.

2008 manual GT with deluxe trim, Edelbrock e-force, FRPP GTB Mufflers. 3.73 gears, Coast Ultralight Drive-shaft. 18" OEM Polished Bullitts, Webelectric Sequentials, XM built into the Shaker 500. Alarm and Escort RedLine.
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post #5 of 9 (permalink) Old 11-03-2010
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Having installed 3.73 Motive gears in my '06 pony, I have posted this a couple of times. First, check that the gear backlash is on the low side of the install tolerance (.008 to .010 inch). Second, replace the gear oil with 75-140 wt oil, I like Amsoil but probably any good synthetic gear oil should be fine.
Good Luck.
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post #6 of 9 (permalink) Old 11-03-2010 Thread Starter
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Ok ok gotcha. Thats good because I actually have the oil 75 140(Royal Purple) to put in it this time. The last oil I used was like 75 90 I believe. Thanks for the tip. I'll be sure to do that.

2010 V6 Mustang Auto pony package
Go: BBK Shorty Headers, Dual Exhaust, 4.10 Gears w/ LSD, 93 Octane SCT Tuned, Bosch Plat 4 Spark Plugs, J&M Camber plates, 06 GT Shocks/Struts, BBK CAI, Eibach lowering springs
Show: Steeda Strut tower brace, 4.0 Billet fuel door, Blackout rear end

Future mods: SD Coil pack/wires, Drag Radials.

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post #7 of 9 (permalink) Old 11-04-2010
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my motive 3.73`s dont whine at all, at any speed. ive been running that royale purple. also used it to break in the gears, then replaced it with new.

05 V6 auto,
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post #8 of 9 (permalink) Old 11-04-2010 Thread Starter
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Yea, ive heard diffrent stories on breaking in gears. How do you break in yours? My mechanic said just break em in on the track lol. I've heard some people say do a figure 8 in an empty parking lot.

2010 V6 Mustang Auto pony package
Go: BBK Shorty Headers, Dual Exhaust, 4.10 Gears w/ LSD, 93 Octane SCT Tuned, Bosch Plat 4 Spark Plugs, J&M Camber plates, 06 GT Shocks/Struts, BBK CAI, Eibach lowering springs
Show: Steeda Strut tower brace, 4.0 Billet fuel door, Blackout rear end

Future mods: SD Coil pack/wires, Drag Radials.

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post #9 of 9 (permalink) Old 11-04-2010
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Quote:
Originally Posted by Siloras View Post
Yea, ive heard diffrent stories on breaking in gears. How do you break in yours? My mechanic said just break em in on the track lol. I've heard some people say do a figure 8 in an empty parking lot.
are you installing them?

gear whine is all relative...but it is all in the installation. get you a good mech that has done it before with ALL the eqpt necessary for checking backlash and ink pattern and follow best pratices recommendations....

i ve heard break'n period is the first 500-1,000 miles, driving it at moderate speed (no track time or crazy donuts burnouts) and changing the oil after that first 1,000 miles...
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