Anyone done a gear change themselves? - Mustang Evolution

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Old 07-01-2010, 01:29 AM   #1
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Anyone done a gear change themselves?

I'm just an old country gearhead, and I do not see the reason to let anyone else have all the fun with my new hobby. I will be changing my 3:33 rear gears this weekend to a new set of FRPP 4:10s with new bearing set. I would appreciate any tips from someone that has done this before.
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Thanks as always for your time and thoughts
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Old 07-01-2010, 10:29 AM   #2
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Re: Anyone done a gear change themselves?

Changing gears without the help of someone that has done it before is not a good idea. I've done plenty of gear swaps. You need a push style mic gauge with a clamp to set the backlash. And you need an inch pounds torque wrench. Not the click style but one with a needle gauge to set the pinion preload. And you will need a vice style mic to see the thickness of the shims.

I usually don't steer people away from trying new things, but gears have to be set exactly right or they will whine and wear out faster. And once they start whining you can't go in and adjust them. You have to replace them.
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Old 07-01-2010, 10:53 AM   #3
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Re: Anyone done a gear change themselves?

simple answer, dont do it unless you know how (correctly) to do it. Even shops get it wrong... so let someone do it that knows how to do it and get in writing a warranty that the gears will not whine (there is no whine while they break it ect ect.. whine = not installed right)
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Old 07-01-2010, 02:30 PM   #4
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Re: Anyone done a gear change themselves?

Thanks for the input. I am going to have my son-in-law who is a heavy line teck for Chysler with me and we will be using the facilities at his shop. While he is not a Ford Fan nor has worked on a Mustang before he is their shops go-to guy on rear ends. Just not Dana's. So with old school and new school and my studing and you good folks advice----How could I go wrong?
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Old 07-01-2010, 08:54 PM   #5
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Re: Anyone done a gear change themselves?

Best thing to do is if you have a rearend at your disposal practice removing and reinstalling it, that's how I learned, yes you will need to buy the calipers as stated above. I got mine from ebay, name brand at a 1/3rd the price.
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Old 07-01-2010, 10:10 PM   #6
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Re: Anyone done a gear change themselves?

Taking pictures of assembled areas and which direction certain parts or units may have sat will help as well. Say you have 2 different sized bolts to take out and you don't want to have to remember where they go...take a pic with a digital camera for future reference...just a suggestion.
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Old 07-01-2010, 10:41 PM   #7
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Re: Anyone done a gear change themselves?

Great input--thank you
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Old 07-02-2010, 03:08 PM   #8
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Re: Anyone done a gear change themselves?

It's really not that bad, if you've got all the proper gear at your disposal. Pressing the bearing off the pinion, assuming they're set up similiarly to GM 10-bolt rear ends, is the hardest part. You've just got to measure everything and make sure it's all to spec, and be prepared to take it apart and change shims until it's right.
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Old 07-17-2010, 06:43 PM   #9
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Re: Anyone done a gear change themselves?

Well the 4:10s are in and no whine. They make first a little jerky if your trying to idle along in a parking lot. They also decreased my gas milage by 4 to 5 mph. That was the bad--Now the GOOD--
The car gets up and goes like a scalded pup. Third is a monster torque gear as at 60 you can goose it and the front just jumps. Floor it in second and the rear will try to break lose on you. Over all very happy but I think if I had to do it all over again I would go for the 3:73s for an all around better driving up-grade.
PS
Found that loose feeling and rattle I was asking about--Sway bar was not torqued on the drivers side. Wonder what up-grades to do next? Supension?
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Old 09-10-2010, 04:30 PM   #10
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Re: Anyone done a gear change themselves?

Did you take and pictures ? I'm replacing mine week after next with 3.73's and have all the required tools including a press. But sure could use your tips or pic's. Never done it before but have done everything else.
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Old 09-10-2010, 06:28 PM   #11
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Re: Anyone done a gear change themselves?

Does anybody know if you can use a rear end out of a 92-93 in a 94-95 I've got a good deal on a $75 8.8 3L73 out of a 93 and would like to put it in my 94 thanks
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Old 09-11-2010, 11:44 AM   #12
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Re: Anyone done a gear change themselves?

http://www.yukongear.com/Downloads/T...structions.pdf
Heres a link I found helpfull. It's pretty straight foward job, the only hard part I had was getting the old gears pressed out
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Old 09-14-2010, 02:09 PM   #13
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Re: Anyone done a gear change themselves?

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Originally Posted by Straublittleman View Post
Does anybody know if you can use a rear end out of a 92-93 in a 94-95 I've got a good deal on a $75 8.8 3L73 out of a 93 and would like to put it in my 94 thanks
The rear end works but is about 0.75" narrower.
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Old 09-14-2010, 09:44 PM   #14
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Re: Anyone done a gear change themselves?

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The rear end works but is about 0.75" narrower.
Thanks! Maybe now I can burn both back tires off instead of one.
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Old 09-14-2010, 11:07 PM   #15
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Re: Anyone done a gear change themselves?

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Thanks! Maybe now I can burn both back tires off instead of one.
No problem! Ever seen those drifter cars----do it
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Old 09-14-2010, 11:23 PM   #16
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Re: Anyone done a gear change themselves?

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No problem! Ever seen those drifter cars----do it
Maybe when I get the supercharged motor installed
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Old 09-14-2010, 11:42 PM   #17
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Re: Anyone done a gear change themselves?

Believe me..with a cold air 4.6 chiped and 410 you can drift to your hearts content--use second hand tires
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Old 09-15-2010, 07:40 PM   #18
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Re: Anyone done a gear change themselves?

Need any specs let me know I will look them up. Remember 4.10's for automatics and 3.73's for manual's its just what works best.
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Old 09-15-2010, 10:45 PM   #19
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Re: Anyone done a gear change themselves?

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Need any specs let me know I will look them up. Remember 4.10's for automatics and 3.73's for manual's its just what works best.
I agree, but gee where was that info before I put in my 410's with my manual? It is one hell of a slot car
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Old 09-15-2010, 11:16 PM   #20
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Re: Anyone done a gear change themselves?

Some guy I met the other day told me that 3.73's were the wrong answer and I should go with 3.55's. I have a 5spd
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Old 09-16-2010, 01:42 AM   #21
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Re: Anyone done a gear change themselves?

I know if you want to swap to a 8.8, 3.55 are easier to find but the difference between the two gear ratio you probably wouldn't see much difference. 2-3 mph difference on the speedo.
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Old 09-16-2010, 07:27 AM   #22
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Re: Anyone done a gear change themselves?

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I know if you want to swap to a 8.8, 3.55 are easier to find but the difference between the two gear ratio you probably wouldn't see much difference. 2-3 mph difference on the speedo.
Been there done that. I have a 2008 GT manual, CIA, SCT tuner on 98Oct prem gas race tune and I will tell you that while it is fun the 373 would have been a better all around choice from the 331 that was in it. If I had the 355 I would have probley left it alone as there would not have been that much diff to the 373, knowing what I know now.
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