489 case 4:10 SG
- Thread starter RussDavis
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Hell, I'm starting to think my 3.91's are to much for my 5.7 hemi, so what are you going to use out of curiosity? Looks like a nice unit...glws!!
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RussDavis
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Because of my 727 trans, I'm going with 3:23 and move to 3:55 if needed. But I know 4:10 won,t cut it. Worked great with my 440
RussDavis
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Yes Dana power lock
RussDavis
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Sure Grip is the Chrysler name for a limited slip differential. It was optional on the 8-3/4" axles, 1958-1974. Two styles were used.
1958-1969 used the Dana Power-Lok (# 2881487). This unit utilized clutches for the differential locking action. The Power-Lok can be rebuilt using kit # 2070845 ( Mopar Performance [MP] # P4529484 ). In this assembly, axle driveshaft end thrust is taken by the thrust block assembly (replacement # 2881313). This Sure Grip appeared in the '741' and '742' assemblies. The axle bearings are: 25590 (Timken cone), and 25520 (Timken cup), (Chrysler numbers 1790523 and 696403). The Dana Power-Lok can be recognized by its bolt-together assembly, bolts around the side opposite the ring gear, and multiple openings exposing the cross shafts.
1969-1974 used the Borg Warner Spin Resistant (# 2881343). This unit utilized a spring-preloaded cone friction arrangement for the locking action. Axle end thrust is taken by the cross shaft. This Sure Grip appeared in '489' assemblies and 70 and later '741'/'742' assemblies. The differential axle bearings are: LM 104912 (Timken cone), and LM 104949 (Timken cup), (Chrysler numbers 2852729 and 2852728). The Borg Warner Spin Resistant unit can be recognized by its lack of bolts on the side opposite the ring gear (like the Dana), and two openings exposing the preload springs. Borg Warner sold this design to Auburn Gear who currently offers the replacement Sure Grip assemblies.
1958-1969 used the Dana Power-Lok (# 2881487). This unit utilized clutches for the differential locking action. The Power-Lok can be rebuilt using kit # 2070845 ( Mopar Performance [MP] # P4529484 ). In this assembly, axle driveshaft end thrust is taken by the thrust block assembly (replacement # 2881313). This Sure Grip appeared in the '741' and '742' assemblies. The axle bearings are: 25590 (Timken cone), and 25520 (Timken cup), (Chrysler numbers 1790523 and 696403). The Dana Power-Lok can be recognized by its bolt-together assembly, bolts around the side opposite the ring gear, and multiple openings exposing the cross shafts.
1969-1974 used the Borg Warner Spin Resistant (# 2881343). This unit utilized a spring-preloaded cone friction arrangement for the locking action. Axle end thrust is taken by the cross shaft. This Sure Grip appeared in '489' assemblies and 70 and later '741'/'742' assemblies. The differential axle bearings are: LM 104912 (Timken cone), and LM 104949 (Timken cup), (Chrysler numbers 2852729 and 2852728). The Borg Warner Spin Resistant unit can be recognized by its lack of bolts on the side opposite the ring gear (like the Dana), and two openings exposing the preload springs. Borg Warner sold this design to Auburn Gear who currently offers the replacement Sure Grip assemblies.
65 Plymouth Satellite 426
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5.7:
I Bet Those 4.10's Really Spin That Motor!
I Bet Those 4.10's Really Spin That Motor!
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Sure.....you can put any gear that's offered for the 8 3/4 89 case in it.
RussDavis
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I would rather have another one built than to waste the money allready spent building this one. Build cost on this one with new gears and clutches, and kit was just over 800. I have a good 3:23 for my car, that I would upgrade to a 3:55 if I need to.
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Dang, what was the labor charge to do it?
RussDavis
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Well to buy the case, the clutch SG The Richmond gears and kit, new clutch kit are over 500/550 then a professional set up. I would not have figured it either.
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So, the labor was around 250....sounds about right. I'm about to quote a guy 300 labor for a Dana 60 build.
696pack
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I may be interested as I am picking up a 66 Charger in the next week. I don't know what case it has in it but when I get it I will check and if this is still available I will let you know if I can use it.
shag766
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a lot of this stuff is about 13 ft over my head, tech wise. it impresses me how some of you guys know and retain this.
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I have a friend with a photographic memory...kinda pisses me off because I can only remember the numbers of the 89, 42 and the 41 cases. Both the 41 and 42 have the same first 5, 20707 with the 89 being 28814. I guess I've worked on enough of those that the numbers stuck lol I've always been a creature of habit tho but if I go someplace once, I can usually remember how to get there again.
RussDavis
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Deal pending Thanks
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