4:10 Diff case Heat question

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Jun 6, 2005 | 08:53 AM

SgtRock

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4:10 Diff case Heat question

Still wondering if anyone knows about the diff case heating up in a 7.5inch after a upgrade to 4:10 gears?

Anyone....anyone...???

Jun 6, 2005 | 11:44 AM

Monty06

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From: miami florida

you might have broken axle shafts cuasing the case to heat up becuase it's doing double duty check your work double check.

Jun 7, 2005 | 08:57 AM

Help I M Stuck

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From: MARYLAND

being that it's a C clip rear..if a axle was broken..it would slide out and the tire and existing shaft would be laying there..in other words..u wouldn't be able to drive it without the tires sliding out and off.
when u filled it..what weight gear oil did you use? It should have taken about 2 1/2 bottles.

Jun 7, 2005 | 10:42 AM

Monty06

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From: miami florida

that was is in his case yes not in mine i eliminated the c clip. so i had fun fixing it.

Jun 9, 2005 | 09:14 AM

SgtRock

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Dextron III -- 2.5 bottles roughly. Planning on draining it this weekend and taking a peek since its past the 500 mile mark. Heat is still there....still no jumping, grinding, screaming, or whining. My personal opinion is that its the quality of iron used for that Diff case...going to look into an alternate company or a custom case...we'll see after this 500 mile check up

Thanks for the ideas!

Rock
OUT!

Jun 9, 2005 | 02:17 PM

Help I M Stuck

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From: MARYLAND

what weight? off the the top of my head i think I used something like 80w90

Jun 23, 2005 | 08:25 AM

SgtRock

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Correction...not Dex III...that is tranny fluid...my bad. Anyway...it was 80 weight..I am switching to 90 or 120 weight this weeken or next. Will post results then.

Rock out

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Jun 23, 2005 | 10:49 AM

1987EBB2

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You might try some friction modifier also. A good place to get it online is http://www.brothersperformance.com/s...fmm19546a.html It's mostly a mustang shop, but they sell ford friction modifier. I used it in the rear end of my Rx7 to eliminate catching and chatter around corners. It worked prefectly. I'm assuming that it would also keep things cooler.

Their description:

This Ford Motorsport friction modifier must be added to your gear oil when changing your rear gears or performing a rear end oil change. This fluid protects the clutches in the rear differential from prematurely wearing out.
1 4oz bottle per rear axle.

Price: $7.99
Brand: Ford Motorsport
Part Num: FMM19546A

Hope this helps,
Brian