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Old 09-23-2012, 05:15 PM   #1
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Not the normal what gears question?

I have bought 3.73 Ford Racing gears twice now and twice I have had them break so what gears are better? I've heard that Richmond gears are fine if you just drag race but for a daily driver they have a loud whine. I have seen the usa gears and Yukon gears but I've been told the oem ford 3.73's are the best but what can I do about these Ford Racing gears that obviously don't last?
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Old 09-23-2012, 05:38 PM   #2
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Re: Not the normal what gears question?

you've had 2 sets in your one car?
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Old 09-23-2012, 05:41 PM   #3
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Yeah I put the first set in and they broke and messed up my differential and then I bought a eaton diff. And another set of ford racing 3.73's and 6 months later messed up in the rear again so Idk what the issue is with these gears that obviously can't handle it, and yes I paid for someone to install them both times and yes they know their stuff when it comes to racing and installing parts so I'm just at a loss for why these gears don't hold up?
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Old 09-23-2012, 05:45 PM   #4
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Re: Not the normal what gears question?

its not the gears... unless you got 2 bad sets in a row, most, if not everyone, on here uses FRPP gears, and this is the first time I've heard of this issue.
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Old 09-23-2012, 05:48 PM   #5
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Yeah I don't know what the issue is either because I trust my shop with all my car needs and I know they are installing them right its just not making sense why they are breaking Im just wondering if brenspeed can do something about this since I haven't had them in that long?
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Old 09-23-2012, 06:22 PM   #6
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Yea fears are something you should have to replace maybe once in the life of the vehicle. I wouldn't say any other gears are better necessarily, what's going wrong with them?
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Old 09-23-2012, 06:25 PM   #7
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The teeth are braking on the ring gear I think? I have the car in the shop now and they are going to check it out and let me know the damage but from the massive grinding in the rear I know the gears are done, I'm just hoping my differential is ok and my axles are ok as well
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Old 09-23-2012, 06:36 PM   #8
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That's not the gears breaking because the gears are weak, I'm not really well versed on differentials but no way is it weak gears
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Old 09-23-2012, 06:41 PM   #9
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Well then what could it be if its not the gears cause why would two sets break?
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Old 09-23-2012, 06:45 PM   #10
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Re: Not the normal what gears question?

Like I said I'm not well versed in differentials but I do know that there are many precision pieces in there that have require tight tolerances, I know you trust your shop, but maybe they aren't as good with differentials as they are with motors, gears are a different beast than motors or suspension
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Old 09-23-2012, 06:49 PM   #11
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Nah its not the shop they build everything and the guy in charge has been a mechanic with ford for 15 years and they know their stuff about everything so I don't think its the mechanic, but all I know is these gears have failed me twice now?
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Old 09-23-2012, 06:53 PM   #12
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Re: Not the normal what gears question?

don't know what to tell you, I would say have them throw stock gears back in for now and see if you have issues with those. how hard do you drive the car? what kind of suspension work is done?
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Old 09-23-2012, 07:03 PM   #13
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I drive my car like a Mustang guy should, I have lowering springs and that's it? But either way just not happy with these gears at the moment because they started whining before they went out?
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Old 09-23-2012, 07:03 PM   #14
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this is a weird situation. usually the gears are not the weak link. have you broken other parts also? like drive shaft, axles, etc?
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Old 09-23-2012, 07:05 PM   #15
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whining is caused from to much backlash or being set improperly. but if they didnt whine originally maybe the pinion load wasnt set properly? idk on this one but this isnt a common problem.
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Old 09-23-2012, 07:07 PM   #16
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I have a one piece aluminum driveshaft and eaton differential and I don't think the axles broke but I won't know until tomorrow for sure but it just makes such a horrible noise in in the rear end so it just makes me wonder what's going on?
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Old 09-23-2012, 08:33 PM   #17
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Re: Not the normal what gears question?

They are not installed right.
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Old 09-23-2012, 09:02 PM   #18
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Re: Not the normal what gears question?

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Originally Posted by ducatibrandon View Post
They are not installed right.
This was my exact thought the entire time... although he's adamant that his mechanic did not screw them up.

Like I said put stock gears back in and we will see if it is improper installation
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Old 09-23-2012, 09:04 PM   #19
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Quote:
Originally Posted by GrabberBlue5.0

This was my exact thought the entire time... although he's adamant that his mechanic did not screw them up.

Like I said put stock gears back in and we will see if it is improper installation
all though if they get them right this time then we will never know.
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Old 09-23-2012, 09:13 PM   #20
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Re: Not the normal what gears question?

true, but so far it would appear this mechanic is 0-2
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Old 09-23-2012, 09:18 PM   #21
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Quote:
Originally Posted by GrabberBlue5.0
true, but so far it would appear this mechanic is 0-2
good point
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Old 09-23-2012, 09:20 PM   #22
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Re: Not the normal what gears question?

even a broken clock is right twice a day lol
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Old 09-23-2012, 09:50 PM   #23
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Quote:
Originally Posted by CZYFAST
Yeah I put the first set in and they broke and messed up my differential and then I bought a eaton diff. And another set of ford racing 3.73's and 6 months later messed up in the rear again so Idk what the issue is with these gears that obviously can't handle it, and yes I paid for someone to install them both times and yes they know their stuff when it comes to racing and installing parts so I'm just at a loss for why these gears don't hold up?
They actually have to be installed properly or they wear out super fast... Could be the shop
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Old 09-23-2012, 10:30 PM   #24
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A good gear install will NOT whine. I had FRPP 4.10 gears installed and roasted the tires leaving the shop lol going in 20k miles NO whine. No issues at all.

---------- Post added at 10:30 PM ---------- Previous post was at 10:29 PM ----------

Quote:
Originally Posted by Jgill1992
A good gear install will NOT whine. I had FRPP 4.10 gears installed and roasted the tires leaving the shop lol going in 20k miles NO whine. No issues at all.
I had ford dealer install them btw.
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Old 09-23-2012, 11:27 PM   #25
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Well they didn't whine right away and I didn't have any issues for a long time and then I took the car on a ling road trip and they might have heated up but yeah its not the shop I can assure you guys of that because the shop I go to has been racing for years and I trust them and how do you mess up twice? Either way ill find out tomorrow what the story is?
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Old 09-23-2012, 11:30 PM   #26
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How do you get two sets of defective gears in a row?

All I'm trying to say that it's more likely that's it is anything but the quality of gears
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Old 09-23-2012, 11:33 PM   #27
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Re: Not the normal what gears question?

OP - I know you "trust" this shop, but you need to come to terms with the following facts.

1. The shop you trust does not know what they are doing and/or are ripping you off if they have installed these gears twice and are unsure of the cause of failure
2. There is (almost) no possible way you received two sets of gears that were defective from FRPP consecutively
3. If your car was lowered prior to the gear swap and you did not have issues, the problem is with the install
4. If your car was lowered at the same time of the gear install, the shop should have known better and suggested an UCA to correct the pinion angle if it was out of spec
5. If your shop is oblivious to all of the above, they are idiots. Take your care elsewhere.
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Old 09-23-2012, 11:33 PM   #28
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I'm not denying that I just wish I knew why, I mean the first time I think it was the stock differential going out but this time I don't know maybe I broke an axle? I won't know until tomorrow when the take the cover off lol
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Old 09-23-2012, 11:43 PM   #29
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Re: Not the normal what gears question?

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I'm not denying that I just wish I knew why, I mean the first time I think it was the stock differential going out but this time I don't know maybe I broke an axle? I won't know until tomorrow when the take the cover off lol
What makes you think that you broke an axle?
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Old 09-23-2012, 11:46 PM   #30
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If you heard the sound that came from the rear you would think the whole rear end blew up it was nasty sounding and could feel it in the seat when I tried to move forward but backing up it didn't make noise so Idk what I did lol
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Old 09-23-2012, 11:59 PM   #31
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Re: Not the normal what gears question?

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If you heard the sound that came from the rear you would think the whole rear end blew up it was nasty sounding and could feel it in the seat when I tried to move forward but backing up it didn't make noise so Idk what I did lol
Seriously, nobody I have ever heard of has broken an axle on an S197... Sounds like a ****ty install.
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Old 09-24-2012, 12:49 AM   #32
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Well its not like I have a stock car lol
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Old 09-24-2012, 07:40 AM   #33
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Re: Not the normal what gears question?

Whether its the shop or not, you should get free labor if you have them install new gears. If you have to pay, I'd take it to Ford garage.
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Old 09-24-2012, 08:02 AM   #34
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If they do determine its bad gears and replace them again, you should take it somewhere else to have the work double checked. Also make ur mech give u an answer as to why this happened. They should be trying to find out why as well, u know
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Old 09-24-2012, 08:07 AM   #35
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Re: Not the normal what gears question?

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If they do determine its bad gears and replace them again, you should take it somewhere else to have the work double checked. Also make ur mech give u an answer as to why this happened. They should be trying to find out why as well, u know
+1. Not like it happens everyday. And if it does, I wouldn't let them work on ****.
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