problems after 4:10 swap?

78mach1 · July 3rd, 2009, 07:37 PM

well i finished up my 4:10 swap. when we were done i measured 8 thousandths of an inch of back lash. and when we painted em and rolled em they looked great. not to shallow not to deep, not to high not to low.

when i am accelerating from about 35, there is a slight hum, and after about 65 there is a slight vibration threw out the whole vehicle, checked drive shaft its tight, checked bolts there tight, i did the u joint a month ago.

what do you think?.....probably going to pull the diff cover and take another look inside.

1slo5.0 · July 3rd, 2009, 09:02 PM

Gears aren't installed correctly. Pull it apart ASAP before you do permanant damge to the gear set.

78mach1 · July 3rd, 2009, 10:28 PM

Originally Posted by 1slo5.0

Gears aren't installed correctly. Pull it apart ASAP before you do permanant damge to the gear set.

ya i parked it tell sunday when i will have time tow work on it.

what would cause the vibration?

1slo5.0 · July 4th, 2009, 12:22 AM

Originally Posted by 78mach1

ya i parked it tell sunday when i will have time tow work on it.

what would cause the vibration?

Wrong shims. Its most likely too lose. If it howls on decceleration, it confirms that the clearance is too lose.

78mach1 · July 4th, 2009, 04:01 AM

Originally Posted by 1slo5.0

Wrong shims. Its most likely too lose. If it howls on decceleration, it confirms that the clearance is too lose.

would that have shown up in the back lash measurement?

mine is howling during acceleration, and makes zero noise during decceleration.

1slo5.0 · July 5th, 2009, 11:36 AM

Originally Posted by 78mach1

would that have shown up in the back lash measurement?

mine is howling during acceleration, and makes zero noise during decceleration.

It should have been noticed when you meausured.
They aren't used gears, are they?

78mach1 · July 5th, 2009, 04:58 PM

Originally Posted by 1slo5.0

It should have been noticed when you meausured.
They aren't used gears, are they?

the gears were in seans car for a short time. the teeth werent even shiny yet.

im taking it apart today to check it out.

White Thunder · July 6th, 2009, 12:12 AM

blame sean! lol jk

78mach1 · July 6th, 2009, 03:15 PM

Originally Posted by White Thunder

blame sean! lol jk

im considering that lol jk.

no i pull its all apart and rechecked all my measurements, everything looks great, i painted the pinion and rolled it, it couldnt look better.

now is it possibe for the posi to be what is wining?

e3sean · July 6th, 2009, 03:22 PM

they were bran new and set up by a reputable shop in my car and they still had a very low hum to them under acceleration. i herd the richmonds are very touchy when it comes to that but i never had any vibration.. and there was no visable wear at all when i pulled them out. i didnt even have but a few hundo miles on them.

78mach1 · July 7th, 2009, 01:09 AM

Originally Posted by e3sean

they were bran new and set up by a reputable shop in my car and they still had a very low hum to them under acceleration. i herd the richmonds are very touchy when it comes to that but i never had any vibration.. and there was no visable wear at all when i pulled them out. i didnt even have but a few hundo miles on them.

there is not doubt in my mind that they were used or abused or not installed correctly, they looks great and the teeth looked great!.......i think this small vibration might be something im feeling in my drive line that i never felt before because of my old gearing. im considering buying an aluminum drive shaft.

93hatch · July 7th, 2009, 01:27 PM

blame sean

he pee'd on them before they were mailed out

July 3rd, 2009, 07:37 PM	#1
78mach1 Hardcore Enthusiast Join Date: Oct 2007 Location: utah Posts: 1,365 iTrader: 0 reviews	problems after 4:10 swap? well i finished up my 4:10 swap. when we were done i measured 8 thousandths of an inch of back lash. and when we painted em and rolled em they looked great. not to shallow not to deep, not to high not to low. when i am accelerating from about 35, there is a slight hum, and after about 65 there is a slight vibration threw out the whole vehicle, checked drive shaft its tight, checked bolts there tight, i did the u joint a month ago. what do you think?.....probably going to pull the diff cover and take another look inside.

July 3rd, 2009, 09:02 PM	#2
1slo5.0 MM Ninjas! 1990 Mustang LX 9.36@143 mph Join Date: Jan 2006 Location: North Fond du Lac, Wisconsin Posts: 11,375 iTrader: 1 reviews	Gears aren't installed correctly. Pull it apart ASAP before you do permanant damge to the gear set. __________________ My daily driver has 16 cylinders and 4400hp @ 1000 rpm.... ***1988 Mustang GT - Stock....almost

July 6th, 2009, 03:22 PM	#10
e3sean I Post Entirely Way Too Much 1988 lx 9.68@142 Join Date: Nov 2007 Location: goldsboro NC Posts: 5,594 iTrader: 0 reviews	they were bran new and set up by a reputable shop in my car and they still had a very low hum to them under acceleration. i herd the richmonds are very touchy when it comes to that but i never had any vibration.. and there was no visable wear at all when i pulled them out. i didnt even have but a few hundo miles on them. __________________

July 7th, 2009, 01:27 PM	#12
93hatch Banned 1992 Lx 11.39@119.24 Join Date: Jan 2008 Location: Az Posts: 11,665 iTrader: 0 reviews	blame sean he pee'd on them before they were mailed out __________________ [QUOTE=93mustank;2577445]We speed tested my right arm for quickness in shifts... So he could design the cam for proper shift recovery.[/QUOTE]

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