Ideas on rear diff?
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Senior User
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From: Texas A&M
Ideas on rear diff?
Anyone here done a carrier swap on their bronco? i've got a limited slip in the front, open in back. A few questions:
Would the limited slip carrier from the front dana 44 fit in the rear 8.8"? (I dont think so, but hoping. well, wishing.)
Anyone think i'd even notice a difference off-roading (mostly just not-too-ugly-mud) between my current half limited slip half open setup and a all the way trak-lok setup?
...And is it worth the 300 bucks for a new rear carrier?
Fire away!
-Matt
1989 302 EB
4" Rancho Lift
33" General MTs
(soon to have 4.10 gears!)
Would the limited slip carrier from the front dana 44 fit in the rear 8.8"? (I dont think so, but hoping. well, wishing.)
Anyone think i'd even notice a difference off-roading (mostly just not-too-ugly-mud) between my current half limited slip half open setup and a all the way trak-lok setup?
...And is it worth the 300 bucks for a new rear carrier?
Fire away!
-Matt
1989 302 EB
4" Rancho Lift
33" General MTs
(soon to have 4.10 gears!)
New User
Joined: Feb 2002
Posts: 10
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Ideas on rear diff?
I just replaced rear gears, from 3.55 to 4.10. what a difference. I still need to do the front. I have all the parts. A new case is required to accept the new gears. part # for case is a 706945x spicer, and ring and pinion is a 707240.
Post Fiend
Joined: Nov 2002
Posts: 9,987
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From: Memphis, TN
Ideas on rear diff?
No, the front carrier won't fit the back, and no it's not worth $300 - you can almost buy a complete used axle for that. I think I have an old Trac-Lok 8.8" carrier in my junkpile, but you'd have to have it machined to accept the RABS tone ring for your application. You can probably find plenty of them in junkyards if you can find a truck with a damaged rear axle & the first digit of the axle code on the door sticker is "H".
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Senior User
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From: Texas A&M
Ideas on rear diff?
[updated:LAST EDITED ON 03-Nov-02 AT 08:29 PM (EST)]well im really confused now. due to the problems im having with my hubs i was basically mudding in 2wd today - and both of my rear tires were spinning just fine. isn't it true that if i have an open carrier in the back in low- or no-traction situations one tire should recieve no torque, and therefore not spin? so if both tires were gunning all the time, then do i have a limited slip, despite what my door sticker says?
whats this about machining? shouldn't any ford 8.8" carrier fit in my housing? also, i was advised by my mechanic to stay away from used differential parts. he said carriers dont really "wear out" but they can get warped by heat or by improper installation...and he said theres really no way to tell if theyre good or bad. is this true?
whats this about machining? shouldn't any ford 8.8" carrier fit in my housing? also, i was advised by my mechanic to stay away from used differential parts. he said carriers dont really "wear out" but they can get warped by heat or by improper installation...and he said theres really no way to tell if theyre good or bad. is this true?
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Joined: May 2001
Posts: 13,653
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From: Cabot, Arkansas
Ideas on rear diff?
Appearantly you do have a trac-loc.
Yes, any carrier will fit, he was talking about machining and older model 8.8 to run the Rear anti-lock brakes on a later model.
Used parts are always a crapshoot, but for the price you can usually do it two or three times for what new costs. (thats assuming you have too much time on your hands)
Yes, any carrier will fit, he was talking about machining and older model 8.8 to run the Rear anti-lock brakes on a later model.
Used parts are always a crapshoot, but for the price you can usually do it two or three times for what new costs. (thats assuming you have too much time on your hands)
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Ideas on rear diff?
The ability to spin both rear wheels isn't a foolproof indicator of a limited slip diff. If equal traction is present, it can happen. One car I have I can reliably smoke both rears evenly on dry pavement, and its an open diff. Best way to tell is put the rear axle up on jackstands, trans in Park. Rotate one wheel by hand. If it is easy to turn, and the other wheel rotates the opposite direction, its either an open diff, or a LSD with the clutches worn out.
A good LSD will make the wheel pretty hard to rotate, and the other wheel will rotate the opposite also. The torque you need to apply by hand to rotate the wheel on an LSD axle is the clutch pack breakaway torque. On an 8.8 is something like 40 - 50 lb. ft.
About whether rear LSD is worth it, absolutely. I'm amazed at what my Bronc can climb in just 2WD. Not so for a friends who had an open diff.
A good LSD will make the wheel pretty hard to rotate, and the other wheel will rotate the opposite also. The torque you need to apply by hand to rotate the wheel on an LSD axle is the clutch pack breakaway torque. On an 8.8 is something like 40 - 50 lb. ft.
About whether rear LSD is worth it, absolutely. I'm amazed at what my Bronc can climb in just 2WD. Not so for a friends who had an open diff.
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