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  #1  
Old 02-23-2011, 02:28 PM
pcityranger pcityranger is offline
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Default Open diff

I have a 4x4 with open differentials, how much do u think it would cost to purchase and install torsen limited slip like in the fx4?
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  #2  
Old 02-23-2011, 02:32 PM
jack7481 jack7481 is offline
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Default Re: Open diff

it's costing me 455. for a detroit true track L/S and shims.
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  #3  
Old 02-23-2011, 02:41 PM
01_ranger_4x4 01_ranger_4x4 is offline
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Default Re: Open diff

more than its worth, the torsen is a junk LS. go for a detroit true trac.
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2001 Ranger 4x4 Stepside
-RCD Suspension lift
-33x12.5 BFG KM2's on Mickey Thomson classic locks
-4:56 gears
-Auburn gear LS
-James Duff traction bars
-Headers
-Flowmaster duals
-SCT X-Cal2 and some small exterior mods

http://www.cardomain.com/ride/2321189

2005 F-150 Lariat 4x4
-LED third brake light
-Weathertech floor liners
-Edge tuner
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  #4  
Old 02-23-2011, 02:55 PM
ben10 ben10 is offline
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Default Re: Open diff

Find a whole rear axle from a truck with ls, or but a true trac.
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  #5  
Old 02-23-2011, 02:57 PM
01_ranger_4x4 01_ranger_4x4 is offline
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Default Re: Open diff

Quote:
Originally Posted by ben10 View Post
Find a whole rear axle from a truck with ls, or but a true trac.
X2, even better idea, will be lots cheaper
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2001 Ranger 4x4 Stepside
-RCD Suspension lift
-33x12.5 BFG KM2's on Mickey Thomson classic locks
-4:56 gears
-Auburn gear LS
-James Duff traction bars
-Headers
-Flowmaster duals
-SCT X-Cal2 and some small exterior mods

http://www.cardomain.com/ride/2321189

2005 F-150 Lariat 4x4
-LED third brake light
-Weathertech floor liners
-Edge tuner
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  #6  
Old 02-28-2011, 08:03 AM
pcityranger pcityranger is offline
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Default Re: Open diff

Is the 455 for front and rear?
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2004 4.0 4x4 5spd xlt with 175k 4.10 axles, extended cab, cranked t-bars (not maxed), painted black interior, 32x11.5x15 bfg a/t and procomp steel rims
60/40 mod with a shorty console
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  #7  
Old 02-28-2011, 08:35 AM
Tommy2 Tommy2 is offline
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Posts: 102
Default Re: Open diff

The factory 7.5 Ford limited slips/trac-loks are good quality units. You can get them new for around $200. Used, maybe half that - and you can shim them up tight..but I would just buy new.

Summitracing has them for around $200. I found a new one on ebay for $170 shipped. Spent maybe another $20 on bearings, and $20 on fluid. I installed it last week.
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  #8  
Old 02-28-2011, 09:26 AM
pcityranger pcityranger is offline
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Default Re: Open diff

Thank you, im just trying to get some ideas on what it may run me. Ive just been told the factory L/S from ford are garbage and most seem to agree. Idk, im still deciding haha.
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2004 4.0 4x4 5spd xlt with 175k 4.10 axles, extended cab, cranked t-bars (not maxed), painted black interior, 32x11.5x15 bfg a/t and procomp steel rims
60/40 mod with a shorty console
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  #9  
Old 02-28-2011, 09:55 AM
Tommy2 Tommy2 is offline
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Default Re: Open diff

The factory Ford L/S's are not garbage at all. I've seen hundreds of Ford rear ends and been around them for years. They are fairly stout, rebuildable, etc.. Can't imagine what else anyone would want.

Now, on the other hand - the early L/S units made by Auburn which were used in the 7.5s in the early 80s - Those were garbage. Sadly, people will actually pay more for those thinking since they're a name brand they must be better. Those units wear out over time and are not rebuildable, and the spider gears are also tiny in them and blow up fairly easily. Especially when they were used behind modified V8 Mustangs. That's how the 7.5 got a reputation for being weak. A lot of misconceptions out there. Blow outs with the new style Ford L/S's are pretty rare and usually behind a pretty good amount of horsepower with slicks.

I'm new to the Ford Ranger world, and I see a lot of talk about swapping 8.8s into their Rangers. Unless you do a lot of towing, did a more than mild V8 conversion, I wouldn't bother.
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  #10  
Old 02-28-2011, 10:11 AM
01_ranger_4x4 01_ranger_4x4 is offline
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Default Re: Open diff

Quote:
Originally Posted by Tommy2 View Post
The factory Ford L/S's are not garbage at all. I've seen hundreds of Ford rear ends and been around them for years. They are fairly stout, rebuildable, etc.. Can't imagine what else anyone would want.

Now, on the other hand - the early L/S units made by Auburn which were used in the 7.5s in the early 80s - Those were garbage. Sadly, people will actually pay more for those thinking since they're a name brand they must be better. Those units wear out over time and are not rebuildable, and the spider gears are also tiny in them and blow up fairly easily. Especially when they were used behind modified V8 Mustangs. That's how the 7.5 got a reputation for being weak. A lot of misconceptions out there. Blow outs with the new style Ford L/S's are pretty rare and usually behind a pretty good amount of horsepower with slicks.

I'm new to the Ford Ranger world, and I see a lot of talk about swapping 8.8s into their Rangers. Unless you do a lot of towing, did a more than mild V8 conversion, I wouldn't bother.
while i agree that the trac-loc shouldnt be considered junk, it is a weak LS unit though and it fairly ineffective even when new and tight compared to other brands. i had about 60,000 on mine when it grenaded behind my 4.0 (side gears and spiders sheared teeth off) and i replaced it with an auburn gear unit that has performed circles around what my trac loc ever did but in the end its still a limited slip and they all have there weaknesses. might be different seeing as i have the 8.8 and its also not the 80's anymore so im sure improvements have been made by auburn. while on that note, the trac loc in the 9.75 axle in my F-150 is toast as well (70,000 miles) the trac locs arent known for lasting long and my experience with them backs that up.
__________________
2001 Ranger 4x4 Stepside
-RCD Suspension lift
-33x12.5 BFG KM2's on Mickey Thomson classic locks
-4:56 gears
-Auburn gear LS
-James Duff traction bars
-Headers
-Flowmaster duals
-SCT X-Cal2 and some small exterior mods

http://www.cardomain.com/ride/2321189

2005 F-150 Lariat 4x4
-LED third brake light
-Weathertech floor liners
-Edge tuner
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  #11  
Old 02-28-2011, 10:28 AM
Tommy2 Tommy2 is offline
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Default Re: Open diff

Quote:
Originally Posted by 01_ranger_4x4 View Post
while i agree that the trac-loc shouldnt be considered junk, it is a weak LS unit though and it fairly ineffective even when new and tight compared to other brands. i had about 60,000 on mine when it grenaded behind my 4.0 (side gears and spiders sheared teeth off) and i replaced it with an auburn gear unit that has performed circles around what my trac loc ever did but in the end its still a limited slip and they all have there weaknesses. might be different seeing as i have the 8.8 and its also not the 80's anymore so im sure improvements have been made by auburn. while on that note, the trac loc in the 9.75 axle in my F-150 is toast as well (70,000 miles) the trac locs arent known for lasting long and my experience with them backs that up.
Wow, you blew an 8.8 factory L/S behind only a 4.0 motor? Unless you were really rough with it, I'd say Im pretty surprised considering people race Mustangs with those setups. Usually people step up to 31 spline for a lot of HP, but the factory 28spline units still last pretty well.

I have seen trac-loks fail when there is a TON of slack in the clutch's. Thus making the spider gears really sloppy. Did you have any bad bearings or other issues in there also?

Trac loks do lose effectiveness over time when the clutch's wear - but that's usually pretty late in a vehicles life. Even then, you can usually reshim the clutch's, or replace them.

The early cone style Auburn units Ford put in their 7.5s were a joke.. Tiny spider gears. I don't think those cone style units are still used very often. GM used them too in the 80s on some vehicles. They were garbage.

I'm sure theres defintely better limited slips out there. I guess it just comes down to how important it is for your vehicle, how much life you want out of it, how much you can spend, etc.. I honestly don't know much about the aftermarket offerings for the 7.5. I'd imagine it's much more limited than the 8.8s. Thanks to all the Mustang aftermarket support, you have tons of options for them.


Edit: I didnt' even notice the OP has a 4.0 Ranger.. Whoops.. So all this 7.5 talk was for nothing I guess..

Last edited by Tommy2; 02-28-2011 at 10:31 AM.
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  #12  
Old 02-28-2011, 10:34 AM
01_ranger_4x4 01_ranger_4x4 is offline
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Default Re: Open diff

Quote:
Originally Posted by Tommy2 View Post
Wow, you blew an 8.8 factory L/S behind only a 4.0 motor? Unless you were really rough with it, I'd say Im pretty surprised considering people race Mustangs with those setups. Usually people step up to 31 spline for a lot of HP, but the factory 28spline units still last pretty well.

I have seen trac-loks fail when there is a TON of slack in the clutch's. Thus making the spider gears really sloppy. Did you have any bad bearings or other issues in there also?

Trac loks do lose effectiveness over time when the clutch's wear - but that's usually pretty late in a vehicles life. Even then, you can usually reshim the clutch's, or replace them.

The early cone style Auburn units Ford put in their 7.5s were a joke.. Tiny spider gears. I don't think those cone style units are still used very often. GM used them too in the 80s on some vehicles. They were garbage.

I'm sure theres defintely better limited slips out there. I guess it just comes down to how important it is for your vehicle, how much life you want out of it, how much you can spend, etc.. I honestly don't know much about the aftermarket offerings for the 7.5. I'd imagine it's much more limited than the 8.8s. Thanks to all the Mustang aftermarket support, you have tons of options for them.
well ill never say i was easy on it but i didnt drive it much different than most people. the bearing were replaced on the carrier and pinion when i did the re-gear, that was about 20,000 before the LS crapped out. i bought the truck with 10,000 on it and even then the trac loc was about usless offroad but that goes for nearly all LS units. the auburn i replaced it with is better but still not great but i did notice the side gears and such are much larger on the auburn unit.
__________________
2001 Ranger 4x4 Stepside
-RCD Suspension lift
-33x12.5 BFG KM2's on Mickey Thomson classic locks
-4:56 gears
-Auburn gear LS
-James Duff traction bars
-Headers
-Flowmaster duals
-SCT X-Cal2 and some small exterior mods

http://www.cardomain.com/ride/2321189

2005 F-150 Lariat 4x4
-LED third brake light
-Weathertech floor liners
-Edge tuner
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  #13  
Old 02-28-2011, 11:25 AM
Little Blue Little Blue is offline
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Default

My 2 cents. I have an 8.8 with the ltd slip and 4.10s and I was runnin that setup with an open diff and switching is the best decision I've made. I recommend swapping your entire axle for an 8.8 with factory ltd slip with your existing ratio. That's the easiest way to go. (PS: The 8.8 is damn near bulletproof stock.)
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  #14  
Old 02-28-2011, 07:14 PM
sgtsandman sgtsandman is offline
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Default Re: Open diff

Make note, everyone is only taking about the rear differential, you do not want to put a L/S or locker in the front. Just making sure that's understood since you asked.
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2011 Ranger XLT, 4X4, 4 door Super Cab. 4.0L, 5 Speed M50D-R1HD, 3.73:1, 8.8" open differential, Jason Pace cap
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  #15  
Old 02-28-2011, 07:28 PM
Jimmeh Jimmeh is offline
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Default Re: Open diff

Quote:
Originally Posted by sgtsandman View Post
Make note, everyone is only taking about the rear differential, you do not want to put a L/S or locker in the front. Just making sure that's understood since you asked.
Why?

As long as you get a locker that isn't a permanent lock you shouldn't have any issues. They make e-lockers for the front you know
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