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Unread 10-09-2008, 08:02 PM   #1
1dirtywhyjay
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Limited slip... more like limited thinking

#1So forgive me for for being new...
I have an 89 with dana 30's, det. locker front and rear.
I want to change the gear oil. I found the basic answers in the FAQ...
But the addative for limited slip? Sorry for sounding like an office wiener but how do I know if I have limited slip? this thing feels locked up and goes where it wants in 4low.

#2 I want to swap the fan clutch. the ask if i want forward or reverse.
If the fan is mounted behind rad it should be pulling right? reverse?

Thanks.

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Unread 10-09-2008, 09:03 PM   #2
Brandon_YJ
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If you have an LS there should be a badge on the pumpkin stating so.
But you say you have a Detroit locker? That's not a limited slip, that's a locker.
Unless you have an LS made by Detroit of course.

The fan behind the radiator should be pulling. Else the fan would be fighting against the wind entering the front of the vehicle.
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Unread 10-09-2008, 09:05 PM   #3
bigredcherokee
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Question 1. Your not going to need any addative just 75w-90.

Question 2. take your old one off and bring it to them they can cross ref the number on it.
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Unread 10-09-2008, 09:08 PM   #4
bigredcherokee
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Quote:
Originally Posted by Brandon_YJ View Post
If you have an LS there should be a badge on the pumpkin stating so.
But you say you have a Detroit locker? That's not a limited slip, that's a locker.
Unless you have an LS made by Detroit of course.

The fan behind the radiator should be pulling. Else the fan would be fighting against the wind entering the front of the vehicle.
Brandon your right, but I believe that its based more on the which way or Water pump is going. Eary I6 had a revers water pump I know this b/c I cracked the head on my 90 YJ b/c the rotation was diffrent.
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Unread 10-09-2008, 09:17 PM   #5
Brandon_YJ
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Quote:
Originally Posted by bigredcherokee View Post
Brandon your right, but I believe that its based more on the which way or Water pump is going. Eary I6 had a revers water pump I know this b/c I cracked the head on my 90 YJ b/c the rotation was diffrent.
Did you have a serp belt on yours? My 258 has a standard rotational pump on it, I replaced it a few months ago. I have v-belts.
The same as on my old AMC Eagle, v-belt equipped 258 and used a standard rotational pump.
I've never heard of the fan direction being based off the water pump style.
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Unread 10-09-2008, 09:30 PM   #6
pat8942
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The reason the fan is supposed to draw air from the front is to cool the radiator and engine.
If you drew hot air from the engine into the radiator it would hinder cooling considerably.
Quote:
Originally Posted by Brandon_YJ View Post
Did you have a serp belt on yours? My 258 has a standard rotational pump on it, I replaced it a few months ago. I have v-belts.
The same as on my old AMC Eagle, v-belt equipped 258 and used a standard rotational pump.
I've never heard of the fan direction being based off the water pump style.
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Unread 10-09-2008, 09:43 PM   #7
Brandon_YJ
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Quote:
Originally Posted by pat8942 View Post
The reason the fan is supposed to draw air from the front is to cool the radiator and engine.
If you drew hot air from the engine into the radiator it would hinder cooling considerably.
Yeah, that too.
I've still never heard of a fan direction being base on the water pump rotation though.
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Unread 10-09-2008, 10:23 PM   #8
bigsquat
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I know u stated u have a detroit, aussie reckomended that i run a 140 wt in there lockr to quiet it down a little. might not be the same in a detriot but the theory sounds good.
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Unread 10-10-2008, 06:58 AM   #9
muddy93
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Quote:
Originally Posted by Brandon_YJ View Post
Yeah, that too.
I've still never heard of a fan direction being base on the water pump rotation though.
stock clutch fan attaches to the water pump.

so if the water pump is reverse rotation, and you put a regular fan on it, the fan will be turning the wrong direction.
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Unread 10-10-2008, 01:47 PM   #10
NH2112
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Quote:
Originally Posted by pat8942 View Post
The reason the fan is supposed to draw air from the front is to cool the radiator and engine.
If you drew hot air from the engine into the radiator it would hinder cooling considerably.

Forklifts and other industrial equipment with rear-mounted engines do just that and generally don't overheat.
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Unread 10-11-2008, 03:24 PM   #11
1dirtywhyjay
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thank you for the input. I love this forum!
Thanks KEN
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Unread 04-12-2009, 03:40 PM   #12
242much
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get a griffin radiator and a set of electrical fans. lol, thread back from the dead.
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Unread 04-17-2009, 07:08 AM   #13
muddy93
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Quote:
Originally Posted by NH2112 View Post
Forklifts and other industrial equipment with rear-mounted engines do just that and generally don't overheat.

this is true, and in a trail only vehicle, you might not have any problems setting it up that way.
however, once you got up to highway speeds, and have all that air in front of the vehicle trying come in through the radiator, and the fan trying to push it out, I'd bet that it would overheat.
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