2 Qs for those who have 4.10s

[RF Overlord]

I'm finally getting around to possibly doing the 4.10s this spring...I've had no trouble or funny noises from my rear end (TAF and martyo: {insert immature comments here}), but I thought I'd have the axle bearings replaced while the unit was open...how much extra trouble is this and what would the additional cost be?

2nd Q: Should I use synthetic lube and what brand/viscosity?

[sailsmen]

DRobin put in the 4:10 and found the axles were gauled. He just had the axels replaced.

I suggest you PM him.

[TooManyFords]

When I had my 4:30's put in, my dealer replaced mine too after inspection. We caught mine before it caused a serious problem.


John

[SergntMac]

2nd Q: Should I use synthetic lube and what brand/viscosity?
All right, who are you...And what have you done with Bob?

[Go Mifuni]

I'm finally getting around to possibly doing the 4.10s this spring...I've had no trouble or funny noises from my rear end (TAF and martyo: {insert immature comments here}), but I thought I'd have the axle bearings replaced while the unit was open...how much extra trouble is this and what would the additional cost be?

2nd Q: Should I use synthetic lube and what brand/viscosity?
I will also be putting in 4:10s soon (Dennis says I'll have them by Friday :D). I'm not sure if I'll get mine done before you, but let me know if you have the same axle wear problems as some of the others. I'm not looking forward to opening a can of worms but if something needs to be repaired or replaced I guess the earlier the better. :up:
As far as oil goes, I have been using Mobil 1 0w20.

[greyghost]

Have the bearings inspected and if they are good run them. Yes its that simple.

Series 2000 Amsoil gear lube 75-90W. (full synthetic GL-5 rated) if the clutches chatter add the special lube that Amsoil has. It does everything the little bottle of Ford additive does. Any questions on Amsoil just ask me or the other fellow on the list that is a dealer for there products.

[RF Overlord]

All right, who are you...And what have you done with Bob?

Geez...what am I, some sort of "Oil Thread Kingpin"...?

:lol:

I suppose I should have asked: "What brand/viscosity lube did you install with your 4.10s?"

[O's Fan Rich]

2nd Q: Should I use synthetic lube and what brand/viscosity?

Bob, I've seen these ads for KY warming lubricant. That sounds like fun. :banana: http://ky.com/index.jsp
But seriously. I was advised to run a good 75-90 weight in my newly rebuilt 9" for my Mustang project, along with a bottle of posi lube. But that's with new clutch plates. I am under the impression that the "natural" lubes allow the plates to grab better.

[TAF]

I'm finally getting around to possibly doing the 4.10s this spring...
I'm.....well.....I'm......spee chless :shake: :eek:

[Paul T. Casey]

Todd speechless??? I'm calling :bs:

[BillyGman]

I did two gear changes in my Marauder, and have performed the work myself. The second gear change was done merely because I wanted to go more extreme than the 4.10 gears, and so I opted for the 4.56's after trying out the 4.10's.

I simply bought good ole motorcraft 80W90 gear lube, and ofcourse one 4 oz bottle of the friction modifier additive since that's what the car comes w/from the factory.

I didn't have to replace any of the bearings at all since my car only had 1500 miles on it when I did the first gear change, and 2500 miles on it for the second gear change. However I did replace the pinion and differential bearings anyway since I do tend to be fussy about things.

But if you're going to do the work yourself, I wouldn't mess w/the axle bearings unless your car has been making noise that would indicate bearings. You need some very specific tools to remove and install the axle bearings, and it really isn't neccessary unless perhaps you have more than 50k on your car.

BTW, everything looked fine when I had the rear end on my Marauder apart as far as the axles go.

[SergntMac]

I'm.....well.....I'm......spee chless :shake: :eek:
And who are you? And, what have you done with Todd?

[jgc61sr2002]

[QUOTE=RF Overlord]Geez...what am I, some sort of "Oil Thread Kingpin"...?



Bob - Yes you are the "Oil Thread Kingpin". The axels and bearings should be covered by warranty. :)

[jgc61sr2002]

I'm.....well.....I'm......spee chless :shake: :eek:



Todd - An all time first. :)

[valleyman]

I'm finally getting around to possibly doing the 4.10s this spring...I've had no trouble or funny noises from my rear end (TAF and martyo: {insert immature comments here}), but I thought I'd have the axle bearings replaced while the unit was open...how much extra trouble is this and what would the additional cost be?

2nd Q: Should I use synthetic lube and what brand/viscosity?
I had the same question about the viscosity and carfixer said that Ford recommended 75/140 synthetic. I don't know how to post the link, but his reply was on 1-31-04 in the Garage forum.

[BillyGman]

uhm, valleyman, not to argue, but why would Ford recommend synthetic, when they routinely fill the differentials on all their cars from the factory w/Motorcraft 80W90 standard gear lube? Perhaps carfixer was told that if he does choose to use synthetic lube, then 75/140 weight would be what they would recommend.

Is that what you meant to say? Again, I'm not trying to argue about it, but simply trying to iron out any possible miscommunication here.

[vegasmarauder]

When we had the 300A rear axle fixed under warranty it started chattering afterward. I thought it needed a bottle of the additive, but the dealer said Ford calls for synthetic fluid without the additive anymore. When they took it apart again, they had to replace the center section due to "burned/welded" plates in the Traction-Loc. It works fine now without any additive (5K miles). So I will assume if you use the Ford synthetic you don't need the additive, even thought I personaly use it in all the other Ford rear ends...Just my .02 worth...

[Marauderjack]

Soooo....

What is it...75W90 Dino oil or 75W140 Synthetic?? :(

I bought two aluminum "Ford Motorsports" rear end girdles at Race Parts Dist. in Cornelius, NC yesterday and plan to put them on the MM and Cobra this weekend!! :up:

I think I put the Red Line 75W140 in the Cobra a couple of years ago but would really like to know what to do with the MM?? Both are 8.8" Posi's and don't require "Friction Modifiers" if synthetic is used?? :nono:

Marauderjack :pimp:

[FordNut]

This subject has been beat to death here. Check old threads.

I'm using the Ford rear end lube, 75/140 synthetic WITH the friction modifier. That was what was recommended when I got my gears replaced. I've got about 20,000 miles on them.

Some folks used the synthetic lube without the friction modifier, apparently with no issues.

[valleyman]

uhm, valleyman, not to argue, but why would Ford recommend synthetic, when they routinely fill the differentials on all their cars from the factory w/Motorcraft 80W90 standard gear lube? Perhaps carfixer was told that if he does choose to use synthetic lube, then 75/140 weight would be what they would recommend.

Is that what you meant to say? Again, I'm not trying to argue about it, but simply trying to iron out any possible miscommunication here.
Billy - not to worry, I don't take your response as an argument. I'm just passing on the info that carfixer posted a couple months ago when I had the same question about what viscosity to use. As far as dino oil versus synthetic, it seems that, other than price, the synthetics always come out ahead no matter what the application.

[BillyGman]

yes, the synthetic oil is said by many to be better, so I would never debate that. It's just that I've never heard of a Ford car that comes from the factory w/the synthetic stuff in it. If there are any that do, then it would be news to me.That's what I meant. No biggie though.

[drobin]

The axle and bearings come in kit format and includes full synthetic 75/140 oil with additive from Ford. Not necessary to change bearing unless axles become an issue.

Donald
"drobin"

[TooManyFords]

Be forewarned... When they did the axle and bearing deal on mine that the synthetic gear lube that was supposed to have the additive didn't. I had to take it back a week later because the clutches were chattering so bad I could feel it. The added the friction modifier and all has been well since.

FYI.

John "Patrick O'Friel"

[vegasmarauder]

We had the same problem after the axle change on a 300A. Clutches started chattering a week later. When I took it back for the additive, they said Ford said no to additive in the synthetic fluid and found the clutches were burned and put in a whole new center section under warranty.

[kurly]

OIL SCHMOIL. :lol:
HERE WE GO AGAIN !! :shake:
SEEMS LIKE OIL IS A VERY OPINIONATED SUBJECT :argue: